CN111755568A

CN111755568A - Method for stacking battery strings

Info

Publication number: CN111755568A
Application number: CN202010552456.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Wuxi Lead Intelligent Equipment Co Ltd
Current assignee: Wuxi Lead Intelligent Equipment Co Ltd
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2020-10-09

Abstract

The application discloses a method for stacking battery strings, which comprises the following steps: firstly, laying a battery piece, then laying a welding strip on the battery piece, and enabling a first end of the welding strip to be positioned on the upper surface of the battery piece and a second end to protrude out of the battery piece, thereby forming a series welding unit; after at least two series welding units are constructed, lamination is carried out; enough series welding units can be stacked once to directly form a battery string; when the number of the series welding units of the primary lamination is not enough, the lamination assembly is formed, and a plurality of groups of lamination assemblies are stacked to form the battery string. Therefore, the time for laying the battery piece and the welding strip one by one can be omitted by preparing the series welding units and overlapping the series welding units, and the preparation efficiency of the battery string is further accelerated.

Description

Method for stacking battery strings

Technical Field

The application relates to the technical field of photovoltaic equipment, in particular to a method for serially stacking batteries.

Background

When a battery string is prepared by a traditional method, referring to fig. 1, a battery piece 1' is usually laid, then a welding strip 2' is laid on the battery piece 1', and the second end of the welding strip 2' falls behind the battery piece 1 '; then, laying a battery piece 1' again, covering the second end of the laid welding strip 2' with the battery piece 1', laying a welding strip 2' on the battery piece 1', and similarly, dropping the second end of the welding strip 2' behind the battery piece 1 '; then, the second end of the welding strip 2 ″ is paved with a battery piece 1' ", and the welding strip 2 '" … … is paved on the battery piece 1' ", so that a battery piece and a welding strip are paved successively to finally form a battery string.

The preparation method of the battery string is low in efficiency.

Disclosure of Invention

The application provides a battery string lamination method, which aims to solve the problem of low battery string preparation efficiency in the prior art.

In order to solve the technical problem, the application adopts a technical scheme that: provided is a method for stacking a battery string, which includes the following steps: constructing a series welding unit: firstly, laying a battery piece, then laying a welding strip on the battery piece, and enabling a first end of the welding strip to be positioned on the upper surface of the battery piece and a second end to protrude out of the battery piece; constructing a plurality of series welding units; laminating: after the plurality of series welding units are overlapped, any two adjacent series welding units are overlapped, wherein the lower surface of the battery piece of one series welding unit is overlapped above the second end of the welding strip of the other series welding unit.

Further, when a plurality of series welding units are constructed, at least two series welding units are constructed simultaneously.

Further, when stacking, the series welding units are carried one by one, so that a succeeding series welding unit is stacked above a preceding series welding unit.

Further, before lamination, a plurality of series welding units are arranged along a straight line; during lamination, the series welding units are lifted, so that the heights of the series welding units are increased or decreased gradually; moving the series welding unit in a direction in which the straight line extends; when the horizontal projection parts of two adjacent series welding units are overlapped, the series welding units are close to each other in the height direction, and lamination is realized.

Furthermore, when a series welding unit is constructed, a plurality of welding strips are laid on a battery piece; wherein any one of the solder strips extends along a linear direction; a plurality of welding strips are arranged at intervals along the other linear direction; the two linear directions are perpendicular to each other in the horizontal plane.

Further, a plurality of series welding units are stacked to form a battery string; or a plurality of series welding units are stacked to form a laminated assembly; constructing a plurality of lamination assemblies; stacking a plurality of laminated assemblies to form a battery string; in the battery string, any two adjacent laminated assemblies are adopted, wherein the battery plate of the first series welding unit in one laminated assembly is stacked above the second end of the welding strip of the last series welding unit in the other laminated assembly; the first series welding unit is a series welding unit in the laminated assembly, wherein the battery plate is not connected with the second end of the welding strip; the last series welding unit is a series welding unit which is contained in the laminated sheet assembly and does not connect the second end of the welding strip with the battery sheet.

Further, the series welding unit also comprises a net pressing part; after the welding strips are laid on the battery pieces, the pressing net is pressed on the battery pieces so as to press the pressing net to compress the welding strips on the battery pieces.

Further, when the series welding unit is constructed, the welding strip is bent, so that the extending directions of the first end and the second end of the welding strip are not collinear any more.

Further, after lamination, the series welding unit is welded, so that the battery plate and the welding strip are bonded together.

Further, when the series welding unit is constructed, the battery piece and/or the welding strip are/is coated with the soldering flux; and during welding, the high-temperature hot melting soldering flux is used for conveniently bonding the battery piece and the welding strip.

The application provides a method for stacking battery strings, which comprises the following steps: firstly, laying a battery piece, then laying a welding strip on the battery piece, and enabling a first end of the welding strip to be positioned on the upper surface of the battery piece and a second end to protrude out of the battery piece, thereby forming a series welding unit; after at least two series welding units are constructed, lamination is carried out; enough series welding units can be stacked once to directly form a battery string; when the number of the series welding units of the primary lamination is not enough, the lamination assembly is formed, and a plurality of groups of lamination assemblies are stacked to form the battery string. Therefore, the time for laying the battery piece and the welding strip one by one can be omitted by preparing the series welding units and overlapping the series welding units, and the preparation efficiency of the battery string is further accelerated.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

fig. 1 is a conventional battery string construction;

FIG. 2 is a first series welding unit and its lamination pattern;

FIG. 3 is the assembly of FIG. 2 after lamination of the tandem weld unit;

FIG. 4 is a second series welding unit and its lamination pattern;

FIG. 5 is an assembly after lamination by the series welding unit shown in FIG. 4;

FIG. 6 is a third series welding unit and its lamination pattern;

FIG. 7 is the assembly of FIG. 6 after lamination of the tandem weld unit;

FIG. 8 is a schematic top view of the assembly of FIG. 7 after lamination;

FIG. 9 is a fourth series welding unit and its lamination pattern;

FIG. 10 is the assembly of FIG. 9 after lamination of the tandem weld unit;

FIG. 11 is a schematic top view of a tandem welding unit including a press mesh;

FIG. 12 is a front view schematic of the structure of FIG. 11;

fig. 13 is a battery string constructed from the stacked assembly of fig. 6;

fig. 14 is a battery string constructed from the stacked assembly of fig. 9;

fig. 15 is a schematic view of a case where a battery string is continuously produced;

fig. 16 is a schematic structural view of a series welding apparatus.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

The application discloses a battery string lamination method, which comprises the following steps:

the series welding unit 10 is constructed: laying the battery piece 1 and the welding strip 2, so that the first end 2a of the welding strip 2 is positioned on the battery piece 1, and the second end 2b of the welding strip 2 protrudes out of the battery piece 1;

constructing a plurality of series welding units 10;

laminating: after the plurality of series welding units 10 are stacked, any two adjacent series welding units 10 are stacked, wherein the battery sheet 1 of one series welding unit 10 is stacked on the second end 2b of the welding strip of the other series welding unit 10.

Specifically, the battery string stacking method disclosed in the present application is different from the conventional method shown in fig. 1 in that: the series welding unit 10 is constructed. By constructing the series welding unit 10 such that the stack of laminations is stacked one on top of the other by a conventional one cell, a set of weld bands … …, a direct stack of series welding units 10 is achieved.

Through the construction of the series welding unit 10, the steps of feeding the battery plate 1 and the welding strips 2 and the step of laminating can be separated; thereby, in the process of preparing the battery string 20, the feeding of the battery sheet 1 and the welding strips 2, and the lamination of the string welding units 10 can be simultaneously achieved.

It should be added that the solder ribbon 2 is of a long ribbon type structure, and has two opposite ends, i.e. a first end 2a and a second end 2b, along the length direction of the solder ribbon 2. After lamination, the solder strips 2 can connect the battery pieces 1 of two adjacent series-welded units 10, wherein the first end 2a is connected with the battery piece 1 of the series-welded unit 10 where the solder strip is located, and the second end 2b is connected with the battery piece 1 of the other series-welded unit 10.

It should be noted that, for the welding belt 2, the structure and function (connecting the battery cell 1) of the first end 2a and the second end 2b are the same, and therefore, the first end 2a and the second end 2b are distinguished, which is only for convenience of description and understanding. Therefore, when the first end 2a, the second end 2b and the relationship between the first end and the second end and the battery piece 1 are described in the present application, only one case of the solder strip 2 is expressed, and not the absolute case of the solder strip 2. Specifically, the first end 2a of the solder strip refers to a series welding unit, and the solder strip 2 is connected with one end of the corresponding battery piece 1; however, the "first end 2 a" may be actually any one end of the solder ribbon 2. Of course, reference should be made to the detailed description of the embodiments for further ease of understanding.

It should be added that the series welding unit 10 provided by the present application does not limit the specific connection manner of the battery plate 1 and the welding strip 2. For example, the battery piece 1 has a front surface and a back surface, and the first end 2a of the solder strip may be laid on the front surface of the battery piece 1 or on the back surface of the battery piece 1; when a plurality of welding strips 2 are laid on a battery piece 1, part of the welding strips 2 can be laid on the front surface of the battery piece 1, and part of the welding strips 2 can be laid on the back surface of the battery piece 1.

Similarly, a plurality of series welding units 10 for lamination are constructed, and the connection modes of the battery plate 1 and the welding strip 2 in the series welding units 10 can be different. In one embodiment, after lamination, the first end 2a and the second end 2b of the solder strip 2 in part of the series welding unit 10 are respectively connected with the front sides of two adjacent battery pieces 1, and the first end 2a and the second end 2b of the solder strip 2 in part of the series welding unit 10 are respectively connected with the back sides of two adjacent battery pieces 1; for example, referring to fig. 2, wherein all of the battery cells 1 face upward; after lamination, in any three adjacent series welding units 10, two welding strips are connected with two adjacent battery pieces 1, wherein one welding strip 2 is connected with the back surfaces of the two battery pieces 1, and the other welding strip is connected with the front surfaces of the two battery pieces 2. In another embodiment, one end of the partial welding strip 2 is connected with the front surface of the battery piece 1, the other end of the partial welding strip is connected with the back surface of the battery piece 1, and the partial welding strip is simultaneously connected with the front surfaces of two adjacent battery pieces 1 and/or the back surfaces of two adjacent battery pieces 1.

Of course, the connection mode between the battery sheet 1 and the welding strip 2 may be the same in each series welding unit 10. For example, the first end 2a of the solder ribbon of each series welding unit 10 is lapped on the back surface of the battery piece 1. In one embodiment, referring to fig. 3, all the battery pieces 1 face upward to form a lamination, wherein in any two adjacent series welding units 10, the welding strip 2 connecting the two battery pieces 1 is located below the two battery pieces 1. In another embodiment, referring to fig. 6, all the battery pieces 1 face upwards to form a stacked structure, wherein in any two adjacent series welding units 10, the welding strips 2 connecting two battery pieces 1 have first ends 2a on the back of the battery pieces 1 and second ends 2b on the front of another battery piece 1.

For example, the first end 2a of the solder ribbon of each series welding unit 10 is lapped on the front surface of the battery piece 1. In one embodiment, referring to fig. 4, all the battery pieces 1 face upwards to form a stacked structure, wherein in any two adjacent series welding units 10, the welding strips 2 connecting two battery pieces 1 have first ends 2a overlapping the front surfaces of the battery pieces 1 and second ends 2b at the back surfaces of the other battery pieces 1.

In addition, in some special processes, all the battery pieces 1 may be laminated with the back faces facing upwards; or, the front of part of the cell sheet 1 faces upwards, and the back of part of the cell sheet 1 faces upwards; the orientation of the battery plate 1 can be adjusted correspondingly when the series welding unit 10 is constructed, and/or the contact position of the welding strip 2 on the battery plate 1 can be adjusted, and/or the lamination position of the series welding unit 10 can be adjusted according to requirements when the series welding unit 10 is laminated.

In summary, the lamination positions of the series welding units 10 and the series welding units 10 (for example, one series welding unit 10 is stacked above or below the welding strip 2 of another series welding unit 10), and the connection modes of the battery plate 1 and the welding strip 2 in the series welding unit 10 can be various according to the process requirements, and the application is not limited specifically.

In addition, for one series welding unit 10, it usually includes only one battery sheet 1, but according to the specification and process requirements of the battery sheet 1, a plurality of welding strips 2 (for example, six, nine, etc.) may be laid on one battery sheet 1; the welding strips 2 are arranged corresponding to the grid lines on the surface of the battery piece 1, and can play a role in guiding current when two adjacent battery pieces 1 are connected.

Further, in a series welding unit 10, when a plurality of welding strips 2 are laid on a battery piece 1, the extending directions of the welding strips 2 may be uniform (i.e., any welding strip 2 extends along a straight line direction); the welding strips 2 are arranged at intervals along the other straight line direction; wherein, the extending direction of the solder strip 2 and the arrangement direction of the solder strip 2 are mutually vertical in the horizontal plane. For example, referring to fig. 5, fig. 5 is a top view of the stacked assembly of the embodiment of fig. 4, in which a series welding unit 10 includes a battery plate 1 and nine solder strips 2, the solder strips 2 extend in the left-right direction, and the nine solder strips are spaced apart in the up-down direction.

Furthermore, after lamination, a plurality of series welding units 10 are overlapped and arranged along a straight line direction and are in a long strip shape; it can be seen that, for the laminated assembly, the solder ribbons 2 of each series welding unit 10 extend in the linear direction. For convenience of description, the linear direction is referred to as a first direction; in the horizontal plane, a direction perpendicular to the first direction is a second direction. It will be appreciated that the assembly after lamination, in any of the tandem cells 10. The plurality of solder strips 2 are arranged in the second direction. For example, referring to fig. 5, the stacked assembly extends in the left-right direction, wherein each solder ribbon 2 extends in the left-right direction, and nine solder ribbons in one series welding unit 10 are arranged at intervals in the up-down direction.

Therefore, during lamination, the overlapped series welding units 10 and the welding strips 2 on the overlapped series welding units need to be adjusted to extend towards the first direction; alternatively, when the series welding unit 10 is prepared, the solder ribbon 2 is caused to extend toward the first direction; when the states of the series welding units 10 are consistent and are arranged along the first direction, the series welding units 10 are moved along the first direction to be close to each other, and then the lamination of the series welding units 10 can be realized.

Of course, depending on the process, in other embodiments, one series welding unit 10 may include only one welding strip 2; alternatively, one series welding unit 10 may include a plurality of battery plates 2 (the plurality of battery plates 2 may be connected by welding strips 2, or may be connected in direct contact with each other); alternatively, the orientation of the solder ribbons 2 in a series welding unit 10 may be different … … from each other and is not particularly limited in this application.

Further, two methods for constructing the series welding unit 10 are detailed by way of example:

example 1.

When the series welding unit 10 is constructed, the battery piece 1 is laid first, then the welding strip 2 is laid on the battery piece 1, and the first end 2a of the welding strip 2 is positioned on the upper surface of the battery piece 1, and the second end 2b protrudes out of the battery piece 1.

Specifically, referring to fig. 4 and 5, after one battery piece 1 is laid, nine welding strips 2 are laid on the upper surface of the battery piece 1; in this embodiment, the first end 2a of the solder strip 2 is specifically the right end of the solder strip 2 shown in the figure, and the second end 2b is specifically the left end of the solder strip 2 shown in the figure; at this time, the right end of the solder strip 2 is connected to the upper surface of the battery piece 1, and the left end falls on the left side of the battery piece 1.

And constructing at least two series welding units 10 and laminating the series welding units so that the lower surface of the battery plate 1 of one series welding unit 10 is overlapped above the second end 2b of the welding strip of the other series welding unit 10 of the two adjacent series welding units 10.

With continued reference to fig. 4 and 5, the stacked assembly of the plurality of series welding units 10, wherein any two adjacent series welding units 10, the battery plate 1 of the left series welding unit 10, are stacked above the second end 2b of the welding strip of the right series welding unit 10.

With further reference to fig. 4 and 5, the assembly after lamination, viewed from right to left, is below the left tandem welding unit 10 at the right tandem welding unit 10.

Example 2.

When the series welding unit 10 is constructed, the welding strip 2 is firstly laid, and then the battery piece 1 is laid on the first end 2a of the welding strip 2, so that the lower surface of the battery piece 1 is connected with the first end 2a of the welding strip, and the second end 2b of the welding strip 2 protrudes out of the battery piece 1.

Specifically, referring to fig. 6, after nine solder strips 2 are laid, a battery piece 1 is laid above the first end 2a of the solder strip; in this embodiment, the first end 2a of the solder strip 2 is specifically the left end of the solder strip 2 shown in the figure, and the second end 2b is specifically the right end of the solder strip 2 shown in the figure; at this time, the left end of the solder strip 2 is connected to the lower surface of the cell 1, and the right end thereof is located at the right side of the cell 1.

And constructing at least two series welding units 10 and laminating the series welding units so that the upper surfaces of the battery plates 1 of the two adjacent series welding units 10 are overlapped below the second ends 2b of the welding strips of the other series welding unit 10.

With continued reference to fig. 6, a plurality of series-welded units 10 are stacked to form a stacked assembly, wherein any two adjacent series-welded units 10, the battery plate 1 of the right series-welded unit 10, are stacked below the second end 2b of the welding strip of the left series-welded unit 10.

With continued reference to fig. 6, viewing the assembly from right to left after lamination, the assembly is below the left series-welded unit 10 at the right series-welded unit 10.

It should be noted that the embodiment shown in fig. 4 or 5 has a substantially identical assembly configuration after lamination as the embodiment shown in fig. 6, except that the protruding solder strip 2 of the last series-welding unit 10 is attached to the front side of the corresponding cell 1 or the back side of the corresponding cell 1; this distinction does not affect the construction of the battery string 20; the construction of the battery string 20 is described in detail below.

When a plurality of series welding units 10 are constructed, the series welding units 10 may be constructed one by one, or at least two series welding units may be constructed at the same time. For example, when four series welding units 10 are constructed at a time, four battery pieces 1 may be laid at a time in the first direction; and laying corresponding welding strips 2 on the battery piece 1. Thus, four series welding units 10 are obtained at a time, and the lamination efficiency can be accelerated.

Further, when a plurality of series welding units 10 are constructed simultaneously, a plurality of battery pieces 1 and a plurality of sets of solder strips 2 may be laid such that the battery pieces 1 are arranged along a first direction, and the solder strips 2 extend along the first direction. Thus, by moving the series welding units 10 in the first direction, a rapid lamination can be achieved.

It is easy to think that whether the series welding unit 10 is constructed one by one or a plurality of series welding units 10 are constructed at the same time, the orientations of the battery plate 1 and the welding strip 2 in the series welding units 10 can be diversified, and only when the lamination is carried out, the series welding units 10 need to be adjusted to be consistent in orientation so as to meet the lamination requirement.

Further, two lamination methods of the series welding unit 10 are detailed by way of example:

example 3.

When stacking, the series welding units 10 are carried one by one so that the succeeding series welding unit 10 is stacked on the preceding series welding unit 10.

It should be explained that after lamination, any two adjacent series welding units 10 are stacked, wherein the battery plate 1 of one series welding unit 10 is stacked on the second end 2b of the welding strip of the other series welding unit 10. At this time, "another series welding unit 10" is defined as a preceding series welding unit 10, and "one of the series welding units 10" is defined as a succeeding series welding unit 10. Specifically, the second end 2b of the tab of the preceding series welding unit 10 is pressed by the battery cell 1 of the succeeding series welding unit 10.

For example, the assembly after the lamination shown in fig. 4 or 5 is constructed; after obtaining a plurality of built series welding units 10, firstly, transporting one series welding unit 10 to a lamination station; after the series welding unit 10 falls to the lamination station, the second end 2b of the welding strip protrudes out of the left side of the battery piece 1, and the main body of the welding strip 2 extends along a first direction (namely, the left and right directions in the figure); then, the second series welding unit 10 is conveyed to the lamination station, and the battery plate 1 of the second series welding unit 10 falls above the second end 2b of the welding strip of the previous series welding unit 10; the second end 2b of the welding strip of the second series welding unit 10 protrudes out of the left side of the battery piece 1, and the main body of the welding strip 2 extends along the first direction; the third series welding unit 10 is transported further so that the battery plate 1 thereof falls … … above the second end 2b of the welding strip of the second series welding unit 10, and the lamination is performed one by one.

As another example, the laminated assembly shown in FIG. 6 is constructed; after obtaining a plurality of built series welding units 10, firstly, transporting one series welding unit 10 to a lamination station; after the series welding unit 10 falls to the lamination station, the second end 2b of the welding strip protrudes out of the right side of the battery piece 1, and the main body of the welding strip extends along a first direction (namely, the left and right directions in the figure); then, the second series welding unit 10 is conveyed to the lamination station, and the battery plate 1 of the second series welding unit 10 falls below the second end 2b of the welding strip of the previous series welding unit 10; wherein, the second end 2b of the welding strip of the second series welding unit 10 protrudes at the right side of the battery piece 1, and the main body of the welding strip 2 extends along the first direction; the third series welding unit 10 is transported further so that its cell pieces 1 fall … … below the second end 2b of the welding strip of the second series welding unit 10, and the lamination is performed one by one.

Example 4.

Before lamination, a plurality of series welding units 10 are arranged along a straight line; during lamination, the series welding units 10 are lifted, so that the heights of the series welding units 10 are increased or decreased gradually; moving the series welding unit 10 in a direction in which the straight line extends; when the horizontal projection portions of two adjacent series welding units 10 are overlapped, the series welding units 10 are close to each other in the height direction, and lamination is realized.

A linear direction in which the plurality of series welding units 10 are arranged, i.e., a first direction; after the plurality of series welding units 10 are arranged in the first direction, the lamination can be performed by moving the series welding units 10 in the first direction.

It will be readily appreciated that the first direction is not a particular direction, and is the lamination direction of the series welding unit 10.

Specifically, after the plurality of series welding units 10 are arranged along the first direction, in any two adjacent series welding units 10, the battery piece 1 of one series welding unit 10 faces the second end 2b of the welding strip of the other series welding unit 10.

The series welding units 10 are lifted, so that the heights of the series welding units 10 are gradually increased or decreased, and according to the process requirement, in any two adjacent series welding units 10, the battery piece 1 of one series welding unit 10 is higher than the second end 2b of the welding strip of the other series welding unit 10, or the battery piece 1 of one series welding unit 10 is lower than the second end 2b of the welding strip of one series welding unit 10; so as to move the series welding unit 10 in the first direction to overlap with the horizontally projected portion of the adjacent series welding unit 10. When the horizontal projection parts of two adjacent series welding units 10 are overlapped, the battery plate 1 of one series welding unit 10 is positioned right above the second end 2b of the welding strip of the other series welding unit 10.

It should be noted that after the heights of the plurality of series welding units 10 are increased or decreased, when the series welding units 10 are moved along the first direction, the series welding unit 10 with the lower height may be moved toward the series welding unit 10 with the higher height, or the series welding unit 10 with the higher height may be moved toward the series welding unit 10 with the lower height. Of course, in some special cases, it is also possible to move a part of the series welding unit 10 with a lower height toward the series welding unit 10 with a higher height, and move another part of the series welding unit 10 with a higher height toward the series welding unit 10 with a lower height. It is only necessary to ensure that, in the final series welding units 10, the horizontal projections of any two adjacent series welding units 10 are partially overlapped.

Moving these series welding units 10 in the height direction enables the series welding units 10 to approach each other until the battery piece 1 contacts the second end 2b of the welding strip. Similarly, when moving in the height direction, the series welding unit 10 with a lower height may move toward the series welding unit 10 with a higher height, or the series welding unit 10 with a higher height may move toward the series welding unit 10 with a lower height. Of course, in some special cases, it is also possible to move a part of the series welding unit 10 with a lower height toward the series welding unit 10 with a higher height, and move another part of the series welding unit 10 with a higher height toward the series welding unit 10 with a lower height. It is sufficient to ensure that any two adjacent series-welded units 10 are in contact in the final series-welded units 10.

In addition, whether moving in the first direction or the height direction, the plurality of series welding units 10 in the lamination can move simultaneously, one by one, and can also partially move simultaneously and partially move … … one by one to meet the requirement of the lamination.

To further increase the lamination efficiency, a plurality of the series welding units 10 can be moved in a first direction, and the series welding units 10 can be moved in a height direction; it is sufficient to ensure that the series welding unit 10 with the higher height is not lower than the series welding unit 10 with the lower height before the series welding unit 10 with the higher height horizontally moves to coincide with the projection part of the series welding unit 10 with the lower height in the two adjacent series welding units 10.

When the plurality of series welding units 10 are moved in the first direction, the foremost or rearmost series welding unit 10 may be relatively fixed in the first direction. For example, when the first direction is the left-right direction, the front-most or rear-most one of the series welding units 10 means the left-most or right-most one of the series welding units 10; when laminating, the leftmost or rightmost one of the series welding units 10 can be moved horizontally without waiting for the other series welding units 10 to approach it.

Similarly, when a plurality of the series welding units 10 are moved in the height direction, the foremost or rearmost series welding unit 10 may be relatively fixed in the height direction. For example, when the first direction is the left-right direction, the front-most or rear-most one of the series welding units 10 means the left-most or right-most one of the series welding units 10; when stacking, the leftmost or rightmost one of the series welding units 10 may not move vertically, and wait for the other series welding units 10 to be lifted to the height increasing or decreasing.

It is easily conceivable that one of the tandem welding units 10 at the forefront or the rearmost may be fixedly provided; when laminating, the series welding unit 10 does not move horizontally or vertically, and the lamination can be realized.

For example, the assembly after the lamination shown in fig. 4 or 5 is constructed; a plurality of series welding units 10 are arranged along a first direction, namely the left and right direction in the figure; at this time, the second end 2b of the solder strip of each series welding unit 10 protrudes to the left of the battery piece 1, and the solder strip 2 extends in the first direction; lifting the series welding units 10 to enable the plurality of series welding units 10 to be gradually increased in height from right to left; translating the series-welded units 10 along a first direction so that the projected parts of adjacent series-welded units 10 are overlapped; all the series welding units 10 are lowered at the same time so that the series welding units 10 are overlapped.

As another example, the laminated assembly shown in FIG. 6 is constructed; a plurality of series welding units 10 are arranged along a first direction, namely the left and right direction in the figure; at this time, the second end 2b of the solder strip of each series welding unit 10 protrudes out of the right side of the battery piece 1, and the solder strip 2 extends in the first direction; lifting the series welding units 10 to enable the heights of the series welding units 10 to be gradually reduced from left to right; translating the series-welded units 10 along a first direction so that the projected parts of adjacent series-welded units 10 are overlapped; all the series welding units 10 are lowered at the same time so that the series welding units 10 are overlapped.

Because the grid line of the surface of the battery piece 1 is sunken and runs into the groove, and the welding strip 2 can be clamped in the groove, in some embodiments, the battery piece does not need to be moved in the height direction during lamination. After the plurality of series welding units 10 are arranged along the first direction, the grid line position of the rear series welding unit 10 is opposite to the second end 2b of the welding strip of the front series welding unit 10; the series welding units 10 are directly translated along the first direction, so that the series welding units 10 are close to each other, and the welding strip 2 of the first series welding unit 10 gradually extends into the grid line groove of the second series welding unit 10.

In the case of the series welding unit 10, only the battery plate 1 and the welding strip 2 are laid, and the relative positions of the battery plate 1 and the welding strip 2 are unstable, so that the battery plate 1 and the welding strip 2 may be relatively displaced during the lamination process or the assembly transferring process after the lamination process, and the accuracy of the lamination process is further affected.

To this end, in one embodiment, the series welding unit 10 further includes a press mesh 3; the pressing net 3 is laid on the battery piece 1 and can press the welding strip 2 on the battery piece 1. Through pressing the net 3, can compress tightly welding strip 2 on battery piece 1, and then the relative position of injecing welding strip 2 and battery piece 1.

Further, when a plurality of welding strips 2 are laid on one battery piece 1, one pressing net 3 may include a plurality of groups of pressing pins capable of correspondingly pressing the welding strips 2. Furthermore, a plurality of pressing pins are arranged in the linear direction, that is, when a group of pressing pins is pressed on the corresponding welding strip 2, a short part of the welding strip 2 can be pressed, but not a little, so that the welding strip 2 is pressed better, and the stable state of the welding strip 2 is ensured.

Two methods of laying the press wire 3 are detailed by way of example:

example 5.

When the series welding unit 10 shown in fig. 4 or 5 is constructed, the first end 2a of the welding strip is positioned on the upper surface of the battery piece 1; at the moment, firstly laying a battery piece 1, and then laying a welding strip 2 on the upper surface of the battery piece 1, so that a first end 2a of the welding strip is lapped on the battery piece 1, and a second end 2b of the welding strip falls on the left side of the battery piece 1; then, a pressing net 3 is laid on the battery piece 1, so that a pressing pin of the pressing net 3 correspondingly presses against the first end 2a of each welding strip, and the welding strips 2 are further pressed on the battery piece 1.

In this embodiment, the series welding unit 10 on which the press net 3 is laid is structured as shown in fig. 7.

Example 6.

When the series welding unit 10 shown in fig. 6 is constructed, the first end 2a of the welding strip is positioned on the lower surface of the battery piece 1; at this time, the solder strip 2 is laid first, and then the battery piece 1 is laid above the first end 2a of the solder strip, so that the first end 2a of the solder strip is connected with the lower surface of the battery piece 1, and the second end 2b falls on the right side of the battery piece 1.

In this embodiment, in one series welding unit 10, the welding strip 2 is pressed by the corresponding battery plate 1, and if the pressing net 3 is laid directly when the series welding unit 10 is constructed, the pressing net 3 affects the lamination of the series welding unit 10. Specifically, when the laminated assembly shown in fig. 6 is constructed, after lamination, in any two adjacent series welding units 10, the battery plate 1 of one series welding unit 10 is laminated below the second end 2b of the welding strip of the other series welding unit 10; at this time, if the pressing net 3 is laid on the upper surface of the battery piece 1 of one series welding unit 10, the second end 2b of the welding strip of the other series welding unit 10 cannot be stacked on the battery piece 1 of the series welding unit 10.

For this purpose, the pressing net 3 may press the first end 2a of the welding strip against the battery plate 1 in the lamination process as the second end 2b of the welding strip of one series welding unit 10 approaches the battery plate 1 of another series welding unit 10. Or, the pressing net 3 may be laid on the battery piece 1 after the second end 2b of the welding strip of one series welding unit 10 is stacked on the upper surface of the battery piece 1 of another series welding unit 10 after lamination, so as to press the second end 2b of the welding strip on the battery piece 1.

In this embodiment, the series welding unit 10 on which the press net 3 is laid is structured as shown in fig. 8.

Therefore, the two groups of welding strips 2 can be tightly pressed on the battery piece 1 by laying the pressing net 3; one set of solder strips 2 is pressed by the battery plate 1, and the other set of solder strips 2 is directly pressed by the pressing net 3.

The battery string 20 can be constructed by constructing the string welding units 10 such that a plurality of the string welding units 10 are stacked.

Specifically, the battery string 20 is formed by laminating a predetermined number of the series welding units 10, and the head portion of the battery string 20 has a head end welding strip 2A connected to and protruding from the first battery plate 1, and the tail portion of the battery string 20 has a tail end welding strip 2B connected to and protruding from the last battery plate 1, wherein the head end welding strip 2A and the tail end welding strip 2B are also used for connecting bus bars (not shown) so as to implement the bus bars of the battery string 20.

For convenience of description, a portion of the battery string 20, excluding the head end bonding tape 2A and/or the tail end bonding tape 2B, formed by stacking a plurality of series-welded units 10 is referred to as a "stacked portion" of the battery string 20.

In addition, the head end welding strip 2A and the tail end welding strip 2B are the same as the common welding strip 2 connected between two adjacent series-welded unit battery pieces 1 in the same battery string 20, and have a plurality of grid lines which are arranged at intervals and connected with the battery pieces 1 according to the process requirement.

Two methods of constructing the lamination portion of the battery string 20 are detailed by way of example:

example 7.

A predetermined number of the series welding units 10 are constructed and the series welding units 10 are arranged in the first direction, and the lamination portion of the battery string 20 can be constructed by moving the series welding units 10 in the height direction and the first direction such that the series welding units 10 are stacked with reference to the lamination method as set forth in example 4.

Alternatively, the lamination series welding units 10 are stacked one by one, and the lamination portion of the battery string 20 is formed when the predetermined number of the lamination series welding units 10 are stacked according to the lamination method as shown in example 3.

In brief, a plurality of the series welding units 10 are stacked to form the battery string 20. The construction of the battery string 20 can be directly completed by stacking a sufficient number of series welding units 10 at a time, or the construction of the battery string 20 can be gradually completed by stacking a sufficient number of series welding units 10 one by one.

Example 8.

A plurality of series welding units 10 are stacked to form a laminated assembly; constructing a plurality of lamination assemblies; stacking a plurality of stacked plate assemblies to form a battery string 20; any two adjacent laminated assemblies in the battery string 20, wherein the battery sheet 1 of the first series welding unit 10 in one laminated assembly is stacked on the second end 2b of the welding strip of the last series welding unit 10 in the other laminated assembly; wherein, the first series welding unit 10 is a series welding unit 10 which is arranged in the laminated sheet assembly and contains the battery sheet 1 and is not connected with the second end 2b of the welding strip; the last series welding unit 10 is a series welding unit 10 in the lamination assembly, which contains a second end 2b of the welding strip that is not connected with the battery plate 1.

It is to be explained that, in this embodiment, the number of the series welding units 10 constituting the laminate assembly does not satisfy the requirement of constructing the battery string 20; for example, 16 series welding units 10 are required for one battery string 20, and 4 series welding units 10 are stacked into a stacked assembly at one time, so that 4 stacked assemblies are required to be constructed, and then 4 stacked assemblies are stacked to finally form the battery string 20.

Through constructing the laminated assembly, the trouble of laminating each series welding unit 10 one by one can be avoided, and the equipment is huge and the operation is complex when the battery string 20 is directly formed by one-time lamination.

In addition, when a plurality of laminated assemblies are constructed, each laminated assembly can be constructed one by one, and at least two groups of laminated assemblies can be constructed simultaneously, so that the preparation efficiency of the battery string 20 is further improved.

It should also be explained that the laminate assembly and the battery string 20 each include a plurality of the series welding units 10, stacked along a straight line; to this end, any laminate assembly, or any battery string 20, regardless of its final configuration, includes a first series welding unit 10 and a last series welding unit. For convenience of understanding, any "first series welding unit 10" refers to the series welding units 10 of the stacked series welding units 10, wherein the battery plate 1 is not in contact with the series welding unit 10 of the other series welding unit welding strip 2; and any "last series-welding unit 10" refers to a plurality of series-welding units 10 after lamination, wherein the welding strip 2 does not contact the series-welding unit 10 of another series-welding unit cell 1. For example, fig. 4 or 5 show a laminated assembly in which the first series welding unit 10 is the rightmost series welding unit 10 and the last series welding unit 10 is the leftmost series welding unit 10. For another example, fig. 6 shows a stacked assembly in which the first series welding unit 10 is the leftmost series welding unit 10, and the last series welding unit 10 is the rightmost series welding unit 10.

Further, regarding the lamination method between the lamination assemblies, the lamination method is similar to that of the series welding unit 10, and is not described herein.

In the above, reference is made to "stacked assembly" for several times, which may be a battery string 20 directly constructed by stacking one or a stacked assembly constructed by stacking one or more stacks.

Although the assembly formed by stacking the series welding units 10 is referred to as a "battery string", it is conceivable that the entire battery string 20 cannot be formed by stacking only the series welding units 10 shown in fig. 4 or 6, and that the head end welding tape 2A or the tail end welding tape 2B should be laid at the head end or the tail end of the stacked assembly. However, it is easily understood that the "battery string" can be surely constructed by the lamination string welding unit 10.

Two methods of constructing the complete battery string 20 are detailed by way of example:

example 9.

Laying a head end welding strip 2A; so that the battery sheet 1 of the first series-welded unit 10 in the battery string 20 is superposed on the leading end weld 2A.

It should be explained that, for the lamination part of the battery string 20, except for the last series welding unit 10, the welding strips 2 of the other series welding units 10 are common welding strips 2 for connecting two adjacent battery plates 1; therefore, the head end bonding tape 2A is connected to the battery piece 1 of the first series welding unit 10 such that the head end bonding tape 2A protrudes from the other side of the battery piece 1 to facilitate connection of the bus bar.

In one embodiment, the battery piece 1 and the corresponding solder strip 2 may be directly laid on the first end solder strip 2A when the first series welding unit 10 is constructed; at this time, the first series welding unit 10, which can be regarded as the battery string 20, includes a head end welding strip 2A, a battery piece 1 and a common welding strip 2; when laminating, other series welding units 10 are laminated behind the first series welding unit 10.

Further, since the second end 2B of the solder ribbon of the last series welding unit 10 is left free and is not connected to other battery cells 1, the solder ribbon 2 of the last series welding unit 10 may be set as the terminal solder ribbon 2B. Specifically, the end welding strips 2B are laid together corresponding to the battery pieces 1 when the last series welding unit 10 is constructed.

Thereby, the lamination is finished, and the battery string 20 is obtained, the head of the battery string 20 having the head end bonding tape 2A and the tail having the tail end bonding tape 2B.

In another embodiment, the first series welding unit 10 may be stacked on the head end bonding tape 2A at the time of stacking. Specifically, at this time, the series welding units 10 are independently constructed, and when the lamination is completed, the first series welding unit 10 is correspondingly stacked above or below the head end welding strip 2A, and the other series welding units 10 are stacked behind the first series welding unit 10. The last series welding unit 10 and the tail end welding strip 2B are constructed in the same manner; eventually a complete battery string 20 is constructed.

For example, the battery string 20 shown in fig. 9 is constructed, the lamination portion of which is constituted by the string welding unit 10 shown in fig. 4 or fig. 5; in this battery string 20, the first series-wound unit 10 is the rightmost series-wound unit 10. Therefore, when the battery string 20 is constructed, a group of (nine) head end welding strips 2A may be laid in the first direction, a battery piece 1 may be laid above the left end of the head end welding strips 2A, and a group of common welding strips 2 may be laid on the upper surface of the battery piece 1 in the first direction, thereby forming the first series welding unit 10. Or after the head end welding strip 2A is laid, a first series welding unit 10 comprising a battery piece 1 and a group of common welding strips 2 is independently constructed, and then the first series welding unit 10 is overlapped above the left end of the head end welding strip 2A. A plurality of series welding units 10 are constructed and stacked on the left side of the first series welding unit 10. When the last series welding unit 10 is constructed, a battery piece 1 is laid firstly, and then a group of tail end welding strips 2B are laid on the upper surface of the battery piece 1. When laminating, the last series welding unit 10 is laid on the leftmost side.

As another example, a battery string 20 shown in fig. 10 is constructed, the lamination portion of which is constituted by the string welding unit 10 shown in fig. 6; it can be seen that the first series-wound unit 10 in the battery string 20 is the leftmost series-wound unit 10. Therefore, when the battery string 20 is constructed, a group of (nine) head end welding strips 2A may be laid in the first direction, then the first series welding unit 10 is constructed independently, and when the battery string is laminated, the first series welding unit 10 is laminated below the right end of the head end welding strips 2A. Or, a group of common welding strips 2 are laid along the first direction, a battery piece 1 is laid above the left end of each welding strip 2, and a group of head end welding strips 2A are laid above the battery piece 1. A plurality of series welding units 10 are constructed and stacked below the right side of the first series welding unit 10. When the last series welding unit 10 is constructed, a group of tail end welding strips 2B are laid firstly, and then a battery piece 1 is laid above the left end of each tail end welding strip 2B. When laminating, the last series welding unit 10 is laid on the rightmost side.

Example 10.

By constructing the string welding unit 10 and stacking a plurality of string welding units 10, one battery string 20a is constructed: another battery string 20b is constructed on the second end 2b of the solder ribbon of the last series-welding unit 10 in the battery string 20 a: so that the battery plate 1 of the first series-welding unit 10 in the battery string 20b is overlapped on the second end 2b of the welding strip of the last series-welding unit 10 in the battery string 20 a; decide the solder strip of connecting two battery strings for two battery strings separation.

It should be noted that the head end bonding tape 2A and the tail end bonding tape 2B are special bonding tapes for connecting bus bars, which completely conform to the process specification of the battery string 20. In a specific embodiment, the first end welding strip 2A and the last end welding strip 2B are welding strips with the same specification, which are longer than the common welding strip 2 connecting two adjacent battery plates 1 in one battery string 20.

In the actual production of the battery strings 20, the respective battery strings 20 may be constructed one by one in accordance with the method given in example 9.

In order to further speed up the construction of the battery string 20, a plurality of battery strings 20 may be constructed in series, that is, the construction of the next battery string 20b may be continued directly after the previous battery string 20a by the manner of example 10. By the mode, the work flow of laying the head end welding strip 2A and the tail end welding strip 2B at each time can be omitted, and the work is accelerated.

In addition, after the battery string 20a is constructed, the battery string 20b can be constructed on the last series welding unit 10; alternatively, the battery string 20a and the battery string 20b may be constructed at the same time, and when the battery string 20b is to be stacked, the battery string 20a is stacked behind the battery string 20 b; alternatively, when the last string welding unit 10 of the battery string 20a is started to be constructed, the battery string 20b … … is constructed on the last string welding unit 10

As can be seen from the above, the solder strips connected between the two battery strings, that is, the solder strip of the last series-welding unit 10 in the battery string 20 a; after cutting the solder strip, the solder strip is divided into two parts, wherein one part is connected with the battery string 20a, and the other part is connected with the battery string 20 b; here, a part of the connected battery string 20a becomes the end tab 2B of the battery string 20a, and a part of the connected battery string 20B becomes the head tab 2A of the battery string 20B.

For this reason, the solder ribbon connecting the two battery strings 20 is longer than the general solder ribbon 2 connecting the two adjacent battery pieces 1 in one battery string 20 according to the specification requirement of the process.

Thus, in the last battery string 20a of the battery strings 20a, the battery sheet 1 is a conventional battery sheet, but the welding strip 2 is another longer welding strip different from the common welding strip 2, the head end welding strip 2A and the tail end welding strip 2B; the first end 2a of the special solder strip is connected with the corresponding battery piece 1, and the second end 2b is connected with the first battery piece 1 of the battery string 20 b.

By constructing the battery string 20b directly behind the battery string 20a, the battery string 20 can be constructed continuously; as will be readily appreciated, these successively constructed battery strings 20 each extend in a first direction.

In one embodiment, when constructing the battery string 20b, the battery piece 1 and the solder ribbon 2 may be directly laid on the second end 2b of the solder ribbon of the last series-welding unit 10 in the battery string 20a, so as to construct the first series-welding unit 10 of the battery string 20 b.

In this embodiment, when stacking, if the battery string 20a is already constructed and no longer moves in the horizontal or vertical direction, the first series-welded unit 10 of the battery string 20b remains stationary with respect to the battery string 20a until another series-welded unit 10 is stacked behind it. If the last series-welding unit 10 of the battery string 20a needs to move horizontally or vertically, the first series-welding unit 10 of the battery string 20b moves along with the last series-welding unit 10, and is matched with other series-welding units 10 of the battery string 20b to realize lamination.

In another embodiment, the series-welded units 10 are constructed first when the battery string 20b is constructed, and the first series-welded unit 10 of the battery string 20b is laminated on the second end 2b of the welding strip of the last series-welded unit 10 in the battery string 20a when the battery string 20b is laminated.

In this embodiment, each series welding unit 10 is independently constructed and is stacked above or below the welding strip of the last series welding unit 10 in the battery string 20a when being stacked.

In addition, when the solder ribbon for connecting the two battery strings is cut off according to the length requirements of the head end solder ribbon 2A and the tail end solder ribbon 2B, the solder ribbon can be divided into two parts, one part is connected with the battery string 20a, and the other part is connected with the battery string 20B; a portion of the solder strip may also be cut out so that the solder strip includes a cut-out, excess portion in addition to the two portions connecting the two battery strings.

In addition, when the last series welding unit 10 of the battery string 20a is constructed, a solder ribbon for connecting two battery strings is laid, and then the solder ribbon is cut. For example, the solder strips can be cut off after being laid on the corresponding battery pieces 1; wherein, a part of the connected battery pieces 1 forms a battery string 20a along with the last series welding unit 10; the cut-off portion constitutes the leading end welding tape 2A of the battery string 20b, and the series welding unit 10 of the battery string 20b is stacked behind the leading end welding tape 2A. For example, after the first series welding unit 10 of the battery string 20b is laid on the solder ribbon, the solder ribbon can be cut. For example, the solder ribbon is cut after the battery string 20b is completely laid.

However, it is easy to think that just laying a series welding unit 10 on the welding strip, the relative position of the two is unstable, and the connection of the two can be affected when cutting. For this purpose, in one embodiment, after at least the last series welding unit 10 of the battery string 20a and the first series welding unit 10 of the battery string 20b are set, the welding strip for connecting the two battery strings 20 is cut.

For the series welding unit 10, it may be shaped by welding. Specifically, after lamination, the series welding unit 10 is welded, so that the battery piece 1 and the welding strip 2 can be bonded together. The welding can be realized through high-temperature hot melt adhesive, and then the battery piece 1 is fixed with the solder strip. In one embodiment, the flux may be applied to the battery plate 1 and/or the solder strip 2 when the series welding unit 10 is constructed; and during welding, the high-temperature hot melting soldering flux is used for bonding the battery plate 1 and the welding strip 2. Before the battery piece 1 and the welding strip 2 are laid together, the surface of the battery piece 1 or the welding strip 2 can be coated with soldering flux; alternatively, after the battery piece 1 and the solder strip 2 are laid together, the connection position of the two may be coated with the flux.

It should be noted that, although only the "battery string 20 a" and the "battery string 20 b" are illustrated, it is easy to associate that any two adjacent battery strings may be continuously constructed in the above-described manner. With the method of example 10, the first battery string is laid with the first solder strip 2A, and the subsequent battery strings can be continuously constructed by laying the longer special solder strips.

Further, when the series welding unit 10 shown in fig. 4 or 6 is constructed, one battery piece 1 is connected above one end of the welding strip 2, and the other battery piece 1 is connected below the other end; at this time, the long solder ribbon 2 may not be accurately attached to the surface of each battery cell 1. For this reason, when the series welding unit 10 is constructed, the solder ribbon 2 may be bent such that the extending directions of the first end 2a and the second end 2b of the solder ribbon are no longer collinear.

For example, the solder strip 2 may be bent in the height direction such that the first end 2a and the second end 2b of the solder strip are at different heights but extend in the same direction.

In one embodiment, the solder strip 2 shown in fig. 4 is bent; wherein, a group of welding strips 2 are connected between any two adjacent series welding units 10; the cell 1 of one series welding unit 10 is positioned below the first end 2a of the welding strip, and the cell 1 of the other series welding unit 10 is positioned above the second end 2b of the welding strip; at this time, the first end 2a is higher than the second end 2 b.

In another embodiment, the solder strip 2 shown in fig. 6 is bent; wherein, a group of welding strips 2 are connected between any two adjacent series welding units 10; the cell 1 of one series welding unit 10 is positioned above the first end 2a of the welding strip, and the cell 1 of the other series welding unit 10 is positioned below the second end 2b of the welding strip; at this time, the first end 2a is lower than the second end 2 b.

With continued reference to the solder strip 2 shown in fig. 4 or 6, it can be seen that the first end 2a and the second end 2b are stepped by bending so that the solder strip 2 is substantially Z-shaped, and the first end 2a and the second end 2b extend horizontally in the left-right direction. After the lamination, a battery piece 1 is connected with the first end 2a, and another battery piece 1 is connected with the second end 2b, and the surfaces of the two battery pieces 1 can be flatly attached to the welding strip 2, so that the stability of the lamination is ensured.

The following examples detail one way of constructing the battery string 20:

four series welding units 10 are constructed simultaneously: simultaneously carrying the four battery pieces 1 to a lamination station so that the four battery pieces 1 are arranged in the left-right direction (i.e., the first direction in this embodiment); simultaneously carrying four groups of welding strips 2 to correspond to the four battery slices 1 one by one, so that the first ends 2a of the welding strips are positioned on the upper surfaces of the corresponding battery slices 1, and the second ends 2b of the welding strips protrude out of the left sides of the corresponding battery slices 1; simultaneously carrying the four pressing nets 3 to correspond to the four battery pieces 1 one by one, so that the pressing nets 3 tightly press the corresponding first ends 2a of the welding strips on the battery pieces 1;

obtaining four series welding units 10;

lifting the series welding units 10 along the height direction, so that the series welding units 10 are from right to left, and the height is increased gradually;

the series welding units 10 are moved rightwards to any two adjacent series welding units 10, the battery plate 1 of the left series welding unit 10 is suspended above the second end 2b of the welding strip of the right series welding unit 10, and the horizontal projection parts of the battery plate and the welding strip are overlapped;

lowering the series-welding units 10 in the height direction so that the adjacent series-welding units 10 are in contact with each other;

obtaining a lamination assembly; the cell 1 of the rightmost series welding unit 10 is not connected with the second end 2b of the welding strip of the other series welding units 10, and the second end 2b of the welding strip of the leftmost series welding unit 10 is not connected with the cell 1 of the other series welding unit 10;

continuing to build a second lamination assembly in accordance with the method described above; when four battery pieces 1 are conveyed, the rightmost battery piece 1 is directly laid on the second end 2b of the welding strip of the leftmost series welding unit 10 in the previous laminated assembly;

while constructing a second lamination assembly, feeding the previous laminated assembly to a welding station; at the moment, the welding station is arranged in front of the lamination station along the left and right directions; at a lamination station, four series welding units 10 are stacked to form a lamination assembly; after the lamination assembly is constructed, the lamination assembly can move rightwards and is close to a welding station while being far away from a lamination station; the assembly to be laminated leaves the lamination station, and a new round of preparation and lamination of the series welding unit 10 can be started at the vacant lamination station; the laminated assembly entering the welding station can be welded, so that the connection of the battery piece 1 and the welding strip 2 is shaped;

in addition, when the lamination assembly leaves the lamination station, the second end 2b of the welding strip of the last series welding unit 10 stays at the first lamination station, so that the first series welding unit 10 of the next lamination assembly is directly constructed on the second end 2b of the welding strip;

during the construction of the second lamination assembly, four series welding units 10 are also obtained, and then the three series welding units 10 on the left side are stacked on the series welding unit 10 on the rightmost side, i.e. on the first lamination station; therefore, the two laminated assemblies are connected into a whole along the left-right direction while the second laminated assembly is completed;

the second lamination assembly moves rightwards to be close to the welding station and the vacant lamination station;

continuing to construct the third laminated assembly according to the method, and connecting the three laminated assemblies into a whole along the left-right direction while finishing the third laminated assembly;

……

when the number of the series welding units 10 is enough, the laminated assemblies connected into a whole form the laminated part of the battery string 20;

when the last series welding unit 10 of the lamination part of the battery string 20 is prepared, a long special welding strip is laid on the corresponding battery piece 1;

constructing a second battery string 20 according to the above method, and laying a first battery piece 1 on the long special welding strip when preparing a first laminated assembly in the second battery string 20, so that the lower surface of the battery piece 1 presses the second end 2b of the welding strip; then, a common solder strip 2 is laid on the cell 1, and a pressing net 4 … … is laid on the solder strip 2

The first lamination assembly of the second battery string 20 is attached behind the previous battery string 20; after the first lamination assembly is finished, the first lamination assembly moves rightwards to be close to a welding station and an empty lamination station; to begin construction of the second lamination assembly … …

And (3) after the first laminated assembly of the second battery string 20 enters a welding station and welding is completed, cutting the welding strip between the two battery strings 20 by using a cutter.

Further, the application also provides a battery string preparation device, which can realize the battery string lamination method; the battery string preparation device includes: a cell sheet feeding device 100 for supplying a cell sheet 1; a solder strip feeding device 200 for supplying the solder strip 2; a lamination device 300 which is provided downstream of the battery sheet feeding device 100 and the solder ribbon feeding device 200 and is capable of receiving the battery sheet 1 supplied from the battery sheet feeding device 100 and the solder ribbon 2 supplied from the solder ribbon feeding device 200; the battery plate 1 and the welding strips 2 constitute a series welding unit 10 in the lamination device 300.

Specifically, the lamination device 300 can provide a platform for receiving the battery piece 1 and the solder strip 2; the battery plate feeding device 100 and the solder strip feeding device 200 cooperate with each other to complete the laying of the battery plate 1 and the solder strip 2 in the laminating device 300, so that the battery plate 1 and the solder strip 2 form the series welding unit 10.

Thus, a plurality of series welding units 10 are constructed in the lamination device 300, and the series welding units 10 are stacked to form the lamination assembly or the battery string 20.

Wherein the lamination device 300 is also capable of providing a lamination robot capable of picking up and stacking the tandem welding unit 10. Similarly, the battery plate feeding device 100 and the solder strip feeding device 200 may also respectively include a feeding robot, which can pick up the battery plate 1 or the solder strip 2 and correspondingly lay the battery plate 1 and the solder strip 2 while conveying the battery plate 1 or the solder strip 2 to the stacking device 300.

Further, the battery string preparation apparatus further includes a mesh pressing circulation device 400 provided at one side of the lamination device 300 for supplying the mesh pressing 3.

Through pressing net circulating device 400, can carry and press net 3 to in lamination device 300 for press net 3 to compress tightly and weld area 2 at battery piece 1 upper surface, so that guarantee that the relative position of battery piece 1 and weld area 2 is stable.

Further, the net pressing 3 can be recycled, and after the welding of the laminated battery pieces 1 and the welding strips 2 is finished, the net pressing circulating device 400 can also take down the net pressing 3 so as to recycle the net pressing 3.

The application also provides series welding equipment, which comprises the battery series preparation device and a welding device 500; the welding device 500 is provided downstream of the lamination device 300, and can weld the built series welding unit 10.

The welding device 500 may include an oven, the oven includes a heating element (such as a heating rod, an infrared lamp, etc.) capable of providing heat, and after the built series welding unit 10 enters the oven, the high temperature of the oven can thermally melt the flux coated between the battery piece 1 and the welding strip 2, so as to bond the battery piece 1 and the welding strip 2.

Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. Such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims

1. A method of stacking battery strings, comprising the steps of:

building a series welding unit (10): firstly laying a battery piece (1), then laying a welding strip (2) on the battery piece (1), and enabling a first end (2a) of the welding strip (2) to be positioned on the upper surface of the battery piece (1) and a second end (2b) to protrude out of the battery piece (1);

-building up a plurality of said series welding units (10);

laminating: after the plurality of series welding units (10) are overlapped, any two adjacent series welding units (10) are overlapped, wherein the lower surface of the battery piece (1) of one series welding unit (10) is overlapped above the second end (2b) of the welding strip of the other series welding unit (10).

2. The battery string lamination method according to claim 1, wherein at least two of the string welding units (10) are constructed simultaneously when constructing a plurality of the string welding units (10).

3. The battery string stacking method according to claim 1, wherein, during stacking, the string welding units (10) are handled one by one such that a succeeding string welding unit (10) is stacked above a preceding string welding unit (10).

4. The method of claim 1, wherein a plurality of the series welding units (10) are arranged in a line before lamination;

during lamination, lifting the series welding units (10) to enable the heights of the series welding units (10) to be gradually increased or decreased;

-moving the stringer (10) in the direction of the rectilinear extension;

when the horizontal projection parts of two adjacent series welding units (10) are overlapped, the series welding units (10) are close to each other in the height direction, and lamination is realized.

5. The battery string lamination method according to claim 1, wherein a plurality of welding strips (2) are laid on one battery piece (1) when constructing one string welding unit (10);

wherein any one of the solder strips (2) extends along a straight line direction; the welding strips (2) are arranged at intervals along the other linear direction; the two linear directions are perpendicular to each other in a horizontal plane.

6. The battery string stacking method according to any one of claims 1 to 5, wherein a plurality of the string welding units (10) are stacked to constitute the battery string (20); alternatively, the first and second electrodes may be,

a plurality of series welding units (10) are stacked to form a laminated assembly;

constructing a plurality of the lamination assemblies;

a plurality of the laminated assemblies are stacked to form a battery string (20);

any two adjacent laminated assemblies in the battery string (20), wherein the battery sheet (1) of the first series welding unit (10) in one laminated assembly is overlapped above the second end (2b) of the welding strip of the last series welding unit (10) in the other laminated assembly;

wherein the first series welding unit (10) is a series welding unit (10) in the laminated sheet assembly, and the battery sheet (1) is not connected with the second end (2b) of the welding strip; the last series welding unit (10) is a series welding unit (10) in the laminated sheet assembly, wherein the second end (2b) of the welding strip is not connected with the battery piece (1).

7. The battery string lamination method according to any one of claims 1 to 5, wherein the string welding unit (10) further comprises a press mesh (3);

after the welding strip (2) is laid on the battery piece (1), the pressing net (3) is pressed on the battery piece (1), so that the pressing net (3) compresses the welding strip (2) on the battery piece (1).

8. The cell string lamination method according to any one of claims 1 to 5, wherein the welding ribbon (2) is bent such that the extending directions of the first end (2a) and the second end (2b) of the welding ribbon are no longer collinear when the series welding unit (10) is constructed.

9. The method of stacking battery strings according to any one of claims 1 to 5, wherein after stacking, the string welding unit (10) is welded so that the battery sheet (1) and the welding strip (2) are bonded together.

10. The battery string lamination method according to claim 9, wherein the battery pieces (1) and/or the solder ribbons (2) are coated with the flux when the string welding unit (10) is constructed;

and during welding, the high-temperature hot melting soldering flux is used for bonding the battery piece (1) and the welding strip (2).