CN112490331A - Grabbing unit, grabbing device, battery string stacking equipment and battery string stacking method - Google Patents

Abstract

The invention discloses a grasping unit, grasping device, battery string stacking equipment and battery string stacking method. The battery sheet grabbing part of the sheet and the welding strip clamping part for clamping the welding strip group; wherein, the grabbing unit is set so that after the clamping tool grabbing part grabs the clamping tool, the welding strip clamping part is pressed One end of the clamping tool clamps the head end of the welding ribbon group, and the cell grabbing part grabs the battery slice located under the welding belt group; the front part of the welding belt group close to the head end is located between the clamping tool and the battery slice, and the welding The rear part of the belt group extends beyond the battery sheet; after the gripping unit releases the pressing tool, the welding belt group and the battery sheet, the front part of the welding belt group is stacked on the battery sheet, and the pressing tool is stacked on the front section of the welding tape Partially position the ribbon group. The technical solution provided by the present invention can greatly improve the stacking efficiency of the battery string in the production of the battery string.

Description

Grabbing unit, grabbing device, battery string stacking equipment and battery string stacking method

Technical Field

The invention relates to the technical field of photovoltaic cell self-production, in particular to a grabbing unit, a grabbing device, a cell string stacking device and a cell string stacking method.

Background

In the production process of the photovoltaic cell, a cell string is formed by welding a cell and a welding strip by using cell string welding equipment.

Before welding to form a battery string, firstly, stacking a battery piece and a welding strip, wherein in the traditional stacking mode of the battery piece and the welding strip, the welding strip is conveyed to a conveying device through a welding strip conveying device and the battery piece is conveyed through a battery piece conveying device respectively, so that the welding strip and the battery piece are stacked on the conveying device in sequence.

However, the current stacking mode of the battery plate and the welding strip is low in efficiency, and the production cycle of the battery assembly is influenced.

Disclosure of Invention

The invention aims to provide a grabbing unit, a grabbing device, battery string stacking equipment and a battery string stacking method, so that the stacking efficiency of battery pieces and welding strips is improved.

In order to achieve the purpose, the invention provides a grabbing unit, which comprises a pressing tool grabbing component for grabbing a pressing tool, a battery piece grabbing component for grabbing a battery piece and a welding strip clamping component for clamping a welding strip group, wherein the welding strip group comprises a plurality of parallel welding strips;

the grabbing unit is arranged in such a way that after the compaction tool grabbing component grabs the compaction tool, the welding strip clamping component clamps the head end of one welding strip group at one end of the compaction tool, and the battery piece grabbing component grabs the battery piece below the welding strip group; the front section part of the welding strip group close to the head end is positioned between the pressing tool and the battery piece, and the rear section part of the welding strip group extends beyond the battery piece; after the grabbing unit releases the pressing tool, the welding strip group and the battery piece, the front section part of the welding strip group is overlapped on the battery piece, and the pressing tool is overlapped on the front section part of the welding strip to position the welding strip group.

Preferably, the compaction tool grabbing component is arranged to be capable of adsorbing the compaction tool;

and/or the battery piece grabbing part is arranged to be capable of adsorbing the battery piece.

Preferably, the grabbing tool grabbing component comprises an electromagnet for adsorbing the pressing tool;

and/or the battery piece grabbing part comprises a plurality of suckers for sucking the battery pieces.

According to another aspect of the present invention, there is also provided a grasping apparatus including n grasping units as described above, the n grasping units being arranged in a straight line and the n grasping units being disposed so as to be able to move away from and approach each other along the straight line; the (i + 1) th grabbing unit is located at one end, far away from the solder strip clamping part of the ith grabbing unit, wherein n is any natural number larger than 1, and i is any natural number from 1 to n-1.

Preferably, the grabbing device further comprises a cutting mechanism which is arranged close to the (i + 1) th grabbing unit and used for cutting the welding strip clamped by the (i) th grabbing unit.

Preferably, n gripping units are arranged to be sequentially arranged from high to low.

According to still another aspect of the present invention, there is also provided a battery string stacking apparatus including: the pressing tool bearing device, the battery piece bearing device, the welding strip providing device, the conveying device and the grabbing device are arranged on the pressing tool bearing device; the pressing tool bearing device is used for bearing n pressing tools; the battery piece bearing device is used for bearing n battery pieces, and the welding strip providing device is used for providing a plurality of parallel welding strips;

after each grabbing unit of the grabbing device respectively grabs a compaction tool from the compaction tool bearing device, a welding strip clamping part of a first grabbing unit of the grabbing device clamps a plurality of welding strips from the welding strip providing device and pulls the clamped welding strips to move to the upper side of the battery piece bearing device, and each grabbing unit grabs a battery piece from the battery piece bearing device;

after the n grabbing units of the grabbing device grab the battery pieces and then are far away from each other, so that two adjacent grabbing units are spaced by a preset distance, and after a welding strip is respectively clamped by a welding strip clamping part of each grabbing unit, the welding strip is cut corresponding to each grabbing unit, so that each grabbing unit grabs a stacking assembly formed by stacking the battery pieces, a plurality of cut welding strips and a pressing tool;

the stacked assembly gripped by the n gripping units of the gripping device is released on the conveying device, wherein the battery plate of the next stacked assembly is stacked on the rear section part of the solder ribbon group of the previous stacked assembly.

Preferably, the battery string stacking device further comprises a solder strip gripper arranged corresponding to each grabbing unit of the grabbing device, the solder strip gripper is arranged to grab a solder strip tail at a cutting position when the solder strip is cut, and the solder strip gripper grips the solder strip tail in the process that the grabbing device moves the grabbed stacking assembly onto the conveying device.

Preferably, each solder strip gripper is provided with a solder strip cutting component for cutting the solder strip.

Preferably, the solder strip providing device comprises one or at least two solder strip pressing devices arranged at intervals along the length direction of the solder strip, and the solder strip pressing devices are arranged for pressing the pulled solder strip, so that the middle part of the solder strip obtained by each grabbing unit after cutting is pressed into a flat or bent structure.

Preferably, the battery string stacking apparatus further includes a solder strip cutting part disposed near the (i + 1) th grasping unit, and the solder strip gripped by the (i) th grasping unit is cut by the solder strip cutting part near the (i + 1) th grasping unit;

the battery string stacking equipment further comprises a cutting mechanism, and the welding strip grabbed by the nth grabbing unit is cut by the cutting mechanism.

Preferably, a tail clamp is arranged at one end of the conveying device, and after the nth grabbing unit of the grabbing device releases the held stacked assembly on the conveying device, the tail end of the welding strip of the stacked assembly is clamped and positioned by the tail clamp.

Preferably, the battery string stacking apparatus is provided with at least two of the gripping devices, and the at least two gripping devices alternately release the gripped stacked assemblies on the conveying device.

According to still another aspect of the present invention, there is also provided a battery string stacking method including:

carrying an ith stacking assembly to a conveying device, wherein the stacking assembly comprises a battery plate, a welding strip group and a pressing tool which are sequentially stacked, and i is any natural number greater than 0;

wherein, carry the ith subassembly that stacks to conveyor and include:

controlling the grabbing unit to grab a compaction tool;

controlling the grabbing unit to clamp one welding strip group;

controlling the grabbing unit to grab a battery piece;

controlling the grabbing unit to release the battery plate, the solder strip group and the pressing tool on the conveying device, wherein a front section part of the solder strip group released by the grabbing unit is overlapped on the battery plate, and the pressing tool is overlapped on the front section part of the solder strip group;

setting i as i +1, continuing the step of conveying the ith stacking assembly to the conveying device, and stacking the battery plate of the ith stacking assembly on the rear section part of the welding strip group of the (i-1) th stacking assembly.

Preferably, the grabbing units are provided with at least two, and the at least two grabbing units carry the stacked assemblies onto the conveying device in turn.

According to still another aspect of the present invention, there is also provided a battery string stacking method including: each grabbing unit of the grabbing device is used for grabbing a compaction tool, a welding strip group and a battery piece respectively, and the compaction tool, the welding strip group and the battery piece grabbed by each grabbing unit form a stacking assembly;

and releasing the n stacked assemblies grabbed by the grabbing device on a conveying device, so that the battery plate of the next stacked assembly is stacked on the rear section part of the welding strip group of the previous stacked assembly.

Preferably, each grabbing unit adopting the grabbing device as described above respectively grabs the pressing tool, the solder strip group and the battery piece, and includes:

controlling each grabbing unit of the grabbing device to grab a pressing tool respectively;

controlling a welding strip clamping component of a first grabbing unit of the grabbing device to clamp a plurality of parallel welding strips;

controlling the grabbing device to pull the clamped welding strip to move to a preset position, and enabling each grabbing unit to pick up one battery piece;

controlling the n grabbing units of the grabbing device to be away from each other so that two adjacent grabbing units are spaced by a preset distance, and respectively clamping the welding strip by a welding strip clamping part of each grabbing unit;

and cutting the solder strips corresponding to each grabbing unit, so that each grabbing unit clamps one cut solder strip group.

Preferably, the solder strip holding member of the first gripping unit of the gripping device is controlled to hold a plurality of parallel solder strips, and the method comprises the following steps:

controlling the first grabbing unit to descend to the height of the solder strip; the welding strip clamping component of the first grabbing unit clamps the welding strip;

the control the grabbing device pulls the solder strip that is held to move to preset position to make every the unit of grabbing snatch a battery piece, include:

the n grabbing units of the grabbing device move to the preset position, and in the moving process, the n grabbing units of the grabbing device are controlled to ascend and descend to the same height;

and the n grabbing units at the same height descend to grab the battery piece.

Preferably, the cutting of the solder strip by each corresponding grabbing unit comprises:

grabbing the solder strip by a solder strip gripper at the position of the cut solder strip corresponding to each grabbing unit;

and cutting the welding strip at a position close to the welding strip gripper.

Preferably, the releasing the n stacked assemblies, which are gripped by the gripping device, on the conveying device so that the battery plate of the latter stacked assembly is stacked on the rear end portion of the solder ribbon group of the former stacked assembly includes:

controlling an ith grabbing unit of the grabbing device to release the grabbed ith stacked assembly on the conveying device;

controlling the (i + 1) th grabbing unit to release the grabbed (i + 1) th stacked assembly, so that the battery plate of the (i + 1) th stacked assembly is stacked on the rear section part of the welding strip group of the (i) th stacked assembly;

the solder strip gripper clamping the solder strip group of the ith stacked assembly releases the captured solder strip group;

after the nth stacked assembly gripped by the gripping device is released on the conveying device, the battery string stacking method further includes: and clamping the solder strip group of the nth stacked assembly released by the grabbing device through a tail clamp arranged at the end part of the conveying device.

Preferably, the releasing the n stacked assemblies gripped by the gripping device onto the conveying device includes:

controlling the n grabbing units of the grabbing device to be arranged in a lifting mode from front to back, and enabling the n grabbing units to be close to each other, so that the battery piece of the stacked assembly of the following grabbing unit is located above the welding strip group of the previous grabbing unit;

controlling a first end of a conveying belt of the conveying device to extend for the length of one placing unit step by step along the direction far away from a second end, and forming a feeding station with the length of one placing unit at the first end;

and the first end of the conveying belt extends for the length of one placing unit in each step along the direction far away from the second end, and the gripping device is controlled to release one stacking assembly on the feeding station until the n stacking assemblies are all released on the conveying device.

Preferably, the releasing the n stacked assemblies gripped by the gripping device onto the conveying device includes:

controlling the n grabbing units of the grabbing device to be arranged in a lifting mode from front to back, and enabling the n grabbing units to be close to each other, so that the battery piece of the stacked assembly of the following grabbing unit is located above the welding strip group of the previous grabbing unit;

controlling the first end of a conveying belt of the conveying device to extend the length of the n placing units in a stepping mode along the direction far away from the second end, and forming an empty feeding station at the first end;

the grabbing device places the n grabbed stacked assemblies to the feeding station.

According to the technical scheme provided by the invention, each grabbing unit can grab the stacked pressing tool, the welding strip group and the battery piece at one time, so that the stacked assembly consisting of the pressing tool, the welding strip group and the battery piece is integrally released, and the stacking efficiency of the battery piece and the welding strip can be greatly improved in the production process of the battery string.

Drawings

Fig. 1 is a gripping device provided with three gripping units according to an embodiment of the present invention;

FIG. 2 is a schematic view of the gripping device shown in FIG. 1 gripping a compression tool;

FIG. 3 is a schematic view of the gripping device gripping a compaction tool from a compaction tool carrier and moving toward a weld bead providing device in accordance with one embodiment of the invention;

FIG. 4 is a schematic view of a first gripper unit of the gripping device gripping the solder strip;

fig. 5 is a schematic diagram of three grabbing units of the grabbing device pulling the solder strips onto the cell piece carrying device and grabbing the cell pieces from the cell piece carrying device;

FIG. 6 is a schematic view showing the gripping devices separated from each other by a predetermined distance after gripping the battery pieces and the solder strip gripper gripping the solder strip to be cut;

FIG. 7 is a schematic view of a high-low arrangement of three gripper units of the gripper apparatus;

FIGS. 8-11 are schematic views of the gripping device gradually releasing the gripped plurality of stacked assemblies onto the conveyor;

FIG. 12 is a schematic view of the conveyor transporting the stacked assemblies toward the autoclave after the gripper releases the stacked assemblies onto the conveyor;

FIG. 13 is a schematic view of the structure of the conveying device;

fig. 14 is a schematic diagram of a cell sheet and a pressing tool provided to a string production device on both sides by a cell sheet conveying device and a pressing tool conveying device according to an embodiment of the present invention;

fig. 15 is a schematic view illustrating the supply of a cell and a pressing tool to a string manufacturing apparatus provided at both sides by a cell feeding device and a pressing tool feeding device according to another embodiment of the present invention.

Description of the reference numerals

1-a grabbing unit; 11-pressing the tool to grab the component; 12-a solder strip holding member; 13-a cell gripping member; 2, pressing a tool bearing device; 3-a solder strip supply device; 31-a cutting mechanism; 32-a solder strip pressing device; 4-a cell sheet carrying device; 5-welding a belt gripper; 6-a conveying device; 61-a conveyor belt; 62-a base; 63-step platform; 631-a mounting bracket; 64-a stationary platform; 65-conveyor belt drive mechanism; 651-drive roll; 652-a first guide roll; 653 — a second guide roll; 654-tension roller; 7-tail clamp; 8-a hot-pressing device; 10-a cell piece conveying device; and 20, pressing the tool conveying device.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known structures, methods, devices, implementations, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may also be otherwise oriented, such as by rotation through 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.

The invention provides a grabbing unit, as shown in fig. 1 (fig. 1 shows three grabbing units 1), the grabbing unit 1 comprises a pressing tool grabbing component 11 for grabbing a pressing tool, a battery piece grabbing component 13 for grabbing a battery piece and a welding strip clamping component 12 for clamping a welding strip group, and the welding strip group comprises a plurality of parallel welding strips;

after the compaction tool grabbing component 11 grabs the compaction tool, the welding strip clamping component 12 clamps the head end of one welding strip group at one end of the compaction tool, and the battery piece grabbing component 13 grabs the battery piece below the welding strip group; the front section part of the welding strip group close to the head end is positioned between the pressing tool and the battery piece, and the rear section part of the welding strip group extends beyond the battery piece; after the grabbing unit releases the pressing tool, the welding strip group and the battery piece, the front section part of the welding strip group is overlapped on the battery piece, and the pressing tool is overlapped on the front section part of the welding strip group to position the welding strip group.

In an embodiment of the present invention, the pressing tool grabbing component 11 is configured to be capable of adsorbing the pressing tool, and preferably, the pressing tool grabbing component 11 is an electromagnet, and is capable of adsorbing the pressing tool when the electromagnet is powered on and releasing the pressing tool when the electromagnet is powered off. As shown in fig. 2, the state that the pressing tool grabbing part 11 adsorbs the pressing tool a is shown;

the solder strip holding member 12 may include a plurality of jaws, each jaw holding a solder strip;

the cell gripping member 13 is provided so as to be able to absorb the cell. Preferably, the cell gripping member 13 includes a plurality of suction cups for sucking the cell.

The grabbing unit provided by the invention can grab the pressing tool, the welding strip group and the battery piece at one time, and the grabbed pressing tool, the welding strip group and the battery piece are sequentially stacked to form a stacked assembly. When the battery string is produced, the stacking assembly grabbed by the last grabbing unit is released on the rear section part of the welding strip group of the stacking assembly released by the previous grabbing unit to stack the welding strip group and the battery piece, and the stacked welding strip group and the battery piece are pressed and positioned through the pressing tool. Therefore, the grabbing unit is adopted to stack the welding strip group and the battery piece, and the production efficiency is high.

According to another aspect of the present invention, there is also provided a grasping apparatus including n grasping units 1 as described above, the n grasping units 1 being arranged in a line and the n grasping units 1 being disposed to be able to move away from and close to each other along the line, so that the grasping apparatus can grasp n stacked assemblies of the pressing tool a, the solder ribbon group B, and the battery cell C at the same time. The gripping device shown in fig. 1 comprises three gripping units 1, which can grip three superposed assemblies at a time.

The (i + 1) th grabbing unit is located at the end part, far away from the solder strip clamping part 12 of the (i) th grabbing unit, so that when the solder strip clamping part 12 of the (i) th grabbing unit clamps the head end of the solder strip group B, the tail end of the solder strip group B extends towards the (i + 1) th grabbing unit; wherein n is any natural number larger than 1, and i is any natural number from 1 to n-1.

In a preferred embodiment, the gripping device further comprises a cutting mechanism which is arranged close to the (i + 1) th gripping unit and is used for cutting the welding strip clamped by the (i) th gripping unit, so that the welding strip clamped by the (i) th gripping unit is cut by the cutting mechanism.

Preferably, a cutting mechanism for cutting the solder ribbon held by the ith gripping unit may be provided at the solder ribbon holding member 12 of the (i + 1) th gripping unit, and the solder ribbon group of the (i) th gripping unit is obtained by cutting at the trailing end of the solder ribbon by the cutting mechanism near the (i + 1) th gripping unit while the solder ribbon is held by the solder ribbon holding member 12 of the (i) th gripping unit.

Preferably, n gripping units 1 are arranged in sequence from top to bottom, so that after the n gripping units 1 respectively grip a stacked assembly composed of the pressing tool a, the solder ribbon group B and the battery piece C, the n gripping units are close to each other in the state of being arranged from top to bottom, as shown in fig. 7, the battery piece of the stacked assembly gripped by the (i + 1) th gripping unit can be stacked on the rear section part of the solder ribbon group of the stacked assembly gripped by the (i) th gripping unit, so that when the gripping device releases the n gripped stacked assemblies, the n stacked assemblies are already in the stacked state, and stacking of the battery piece and the solder ribbon can be realized by downward releasing the n stacked assemblies.

According to another aspect of the present invention, there is also provided a battery string stacking apparatus including: the pressing tool bearing device 2, the battery piece bearing device 4, the welding strip providing device 3, the conveying device 6 and the grabbing device are arranged in the pressing tool bearing device; the pressing tool bearing device 2 is used for bearing n pressing tools A; the cell piece carrying device 4 is used for carrying n cell pieces C, and the welding strip providing device 3 is used for providing a plurality of parallel welding strips;

after each grabbing unit 1 of the grabbing device respectively grabs a compaction tool a (shown in fig. 3) from a compaction tool carrying device 2, a solder strip clamping part 12 of a first grabbing unit 1 of the grabbing device clamps a plurality of parallel solder strips (shown in fig. 4) from the solder strip providing device 3, and pulls the clamped solder strips to move to the upper side of the cell piece carrying device 4, and each grabbing unit 1 grabs a cell piece C (shown in fig. 5) from the cell piece carrying device 4;

after the n grabbing units 1 of the grabbing device grab the battery piece C, as shown in fig. 6, the battery piece bearing device 4 is moved away from the lower part of the grabbing device, the n grabbing units 1 are far away from each other so that the two adjacent grabbing units 1 are separated by a preset distance, and after the welding strips are respectively clamped by the welding strip clamping parts 12 of each grabbing unit, the welding strips are cut corresponding to each grabbing unit 1, so that each grabbing unit 1 grabs a stacking assembly formed by stacking the battery piece C, a plurality of cut welding strips and the pressing tool a.

In one embodiment, preferably, as shown in fig. 5 and 6, the battery string stacking apparatus further includes a solder ribbon gripper 5 provided corresponding to each of the grasping units 1 of the grasping device, the solder ribbon gripper 5 is configured to grasp a solder ribbon at a cutting position when cutting the solder ribbon, thereby facilitating cutting, and the solder ribbon gripper 5 grips the solder ribbon of the corresponding grasping unit 1 during the grasping and stacking assembly of the grasping device moves onto the conveying device.

For cutting the welding strip provided by the welding strip providing device 3, the battery string stacking device further comprises a welding strip cutting part which is arranged close to the (i + 1) th grabbing unit 1; like this the ith snatchs the solder strip of the unit centre gripping by being close to the (i + 1) th snatchs the unit the solder strip cuts the part and cuts, the battery cluster stacks equipment still including cutting the mechanism, the nth snatchs the unit snatch the solder strip by cutting the mechanism and cutting, snatch the solder strip that the unit snatched and cut by the mechanism 31 that cuts among the solder strip providing device 3 as the third in figure 6.

Specifically, as shown in fig. 6, after each solder strip gripper 5 grips the solder strip at the corresponding position, the solder strip held by the first gripping unit located at the rightmost side is cut by the solder strip cutting member disposed near the second gripping unit, the solder strip held by the second gripping unit is cut by the solder strip cutting member disposed near the third gripping unit, and the solder strip held by the third gripping unit is cut by the cutting mechanism 31, so that each gripping unit can obtain the cut solder strip group. The head end of a solder strip group obtained by cutting each grabbing unit is clamped by a solder strip clamping part 12, the tail end of the solder strip group is clamped by a corresponding solder strip gripper 5, and then each solder strip gripper 5 moves to a conveying device 6 along with the grabbing device to release the grabbed stacked assembly.

It will be understood by those skilled in the art that a solder strip cutting member for cutting the solder strip may also be provided on each solder strip holder 5. Specifically, when the solder strip is cut, each solder strip gripper 5 grips the solder strip of the corresponding gripping unit, and cuts the solder strip through the solder strip cutting part arranged on the solder strip gripper 5.

In this embodiment, preferably, the solder strip providing apparatus 3 includes one or at least two solder strip pressing apparatuses 32 arranged at intervals along the length direction of the solder strip, and the solder strip pressing apparatus 32 is configured to press the pulled solder strip, so that the middle portion of the solder strip obtained by each grabbing unit after cutting is pressed into a flat or bent structure. As shown in fig. 3 and 4, three solder strip pressing devices 32 are arranged at intervals along the length direction of the solder strip pulled by the first grabbing unit, that is, each solder strip pressing device 32 presses the solder strip to be grabbed by one grabbing unit, or only one solder strip pressing device 32 may be arranged, and the solder strip pressing devices 32 sequentially press the solder strip for multiple times. The middle part of the solder strip to be grabbed by each grabbing unit pressed by the solder strip pressing device 32 refers to the part between two adjacent battery plates when the solder strip is stacked on the battery plate. In this embodiment, the solder strip pressing device 32 is used to press the middle portion of the solder strip into a flat or bent structure, so as to prevent the battery piece located below the front portion of the solder strip and the battery piece located above the rear portion of the solder strip from being pressed and deformed or damaged at the middle portion.

After the solder ribbons are cut so that each grasping unit 1 grasps a stacked assembly formed by stacking the battery chip C, the cut solder ribbons, and the pressing tool a, as shown in fig. 8 to 11, the stacked assemblies grasped by the n grasping units 1 of the grasping device are sequentially released on the conveying device 6, wherein the battery chip C of the latter stacked assembly is stacked on the rear end portion of the solder ribbon of the former stacked assembly.

Preferably, after each gripping unit 1 of the gripping device has gripped a respective stack, n gripping units 1 that are remote from each other are first arranged to be raised from front to back and then brought closer together, so that the battery plates C of the stack gripped by the subsequent gripping unit are stacked on the rear portion of the solder ribbon group B of the stack gripped by the preceding gripping unit, and after the stacks gripped by the n gripping units of the gripping device have been brought closer together, the stack is placed on the conveying device 6.

Preferably, a tail clamp 7 is arranged at one end of the conveying device 6, and after the nth grabbing unit of the grabbing device releases the held stacked assembly on the conveying device 6, the tail end of the welding strip of the stacked assembly is clamped and positioned by the tail clamp 7.

In this embodiment, the conveying device 6 includes a conveying belt and a conveying belt driving mechanism for driving the conveying belt to operate, the first end of the conveying belt is set to extend in a stepping manner in a direction away from the second end and return in a stepping manner in a direction toward the second end, wherein the conveying belt extends in a stepping manner in a direction away from the second end by a predetermined length, the conveying belt forms an empty feeding station at the first end, and the stacked components captured by the capturing device are placed on the feeding station.

In this embodiment, the specific process of releasing the n stacked components gripped by the gripping device on the conveying device 6 is as follows:

the n grabbing units 1 of the grabbing device are arranged in a lifting mode from front to back, and the n grabbing units 1 are close to each other, so that the battery plate C of the stacked assembly of the following grabbing unit is located above the welding strip group B of the previous grabbing unit;

the first end of the conveying belt extends the length of the n placing units step by step along the direction far away from the second end to form a feeding station with the length of the n placing units;

the grabbing device places the n grabbed stacked assemblies on the feeding station.

After a preset number of the stacking assemblies are placed on the conveying belt, the conveying belt conveys towards the second end.

In another embodiment, the first end of the conveyor belt may be stepped by the length of one placing unit at a time in the direction away from the second end, and the gripping device may release one stacked assembly at the feeding station formed by the stepped extension until the n stacked assemblies gripped by the gripping device are all placed on the conveyor device 6; after a preset number of the stacking assemblies are placed on the conveying belt, the conveying belt conveys towards the second end.

It should be noted that each placement unit in the present application has a length that is configured to place a stacking assembly.

Specifically, the gripping device releases the stacking assembly one at a time at the feeding station when the conveying belt steps by the length of one placing unit each time, and when the stacking assembly is placed, the released portion of the stacking assembly where the battery piece is stacked is placed on the rear section portion of the solder ribbon group of the previous stacking assembly, and the rear section portion of the solder ribbon group of the stacking assembly is placed at the feeding station. Further, if the placed stacking assembly is not the last stacking assembly in a battery string, the length of the stepped placing unit is the sum of the length of one battery piece and the piece distance between the stacked battery pieces; when the placed stacking assembly is the last in a battery string, the length of a stepped placing unit is the length of a battery piece plus the distance between strings;

the gripping device can place the n stacked assemblies at the feeding stations of the n placing unit lengths each time the conveyor belt is stepped by the length of the n placing units, and in particular, when the stacked battery piece part of the solder ribbon group of the first stacked assembly of the n stacked assemblies is placed on the rear section part of the solder ribbon group of the previous stacked assembly on the conveyor belt, the rear section part of the solder ribbon group of the last stacked assembly of the n stacked assemblies is located at the outermost end part of the feeding station. Further, if the n stacked assemblies are placed without including the last stacked assembly in a battery string, the distance of the n placing units is the length of the n battery pieces plus the n piece pitch, and if the n stacked assemblies are placed with including the last stacked assembly in a battery string, the distance of the n placing units is the length of the n battery pieces plus the n-1 piece pitch and a string pitch because the length of the solder ribbon between adjacent battery strings is longer than the length of the solder ribbon at the middle portion of one battery string.

The length of the battery piece is the length of the battery piece along the conveying direction of the conveying belt.

In order to enable the conveying belt of the conveying device 6 to extend step by step, the conveying device 6 may be specifically configured as the structure shown in fig. 13, where the conveying device 6 includes a conveying belt 61, and further includes a base 62, a fixed platform 64, a stepping platform 63, and a platform moving mechanism for driving the stepping platform 63 to move, where: the fixed platform 64 is fixedly connected to the base 62, the stepping platform 63 is slidably connected to the base 62, and the platform moving mechanism can drive the stepping platform 63 to move towards or away from the fixed platform 64 in the conveying direction of the conveying belt 61 (the fixed platform 64 is close to the second end of the conveying belt relative to the stepping platform 63);

the conveying belt 61 is arranged on the fixed platform 64 and the stepping platform 63, and when the stepping platform 63 moves away from the fixed platform 64, the conveying belt 61 moves from bottom to top at the end part of the stepping platform 63 away from the fixed platform 64, so that the upper surface of the conveying belt 61 extends along the stepping platform 63 in a stepping direction away from the fixed platform 64, that is, the conveying belt 61 extends towards the first end;

the conveying belt driving mechanism 35 for driving the conveying belt 61 to run comprises a driving roller 651, a first guide roller 652, a second guide roller 653 and a tension roller 654;

the driving roller 651 is arranged at the end of the fixed platform 64 far away from the stepping platform 63 and is driven to rotate by a driving motor, the first guide roller 652 is arranged at the end of the stepping platform 63 far away from the fixed platform 64, the first guide roller 652 and the second guide roller 653 are arranged on the stepping platform 63, the tensioning roller 654 is arranged below the first guide roller 652 and the second guide roller 653, the tensioning roller 654 is arranged to be capable of moving back and forth along the conveying direction of the conveying belt 61 to be adjusted so as to tension the conveying belt 61, specifically, a slide rail extending along the conveying direction of the conveying belt 61 can be arranged on the base 62, and the tensioning roller 654 is driven by the tensioning roller driving cylinder to move back and forth along the slide rail; the conveying belt 61 is sequentially wound on a driving roller 651, a first guide roller 652, a second guide roller 653 and a tension roller 654, wherein the second guide roller 653 is positioned on the conveying surface of the conveying belt 61; when the stepping platform 63 moves away from the fixed platform 64, the first guide roller 652 and the second guide roller 653 move along with the stepping platform 63 and guide the conveying belt 61 to move upward and extend from below, so that the first end of the conveying belt 61 forms a feeding station.

It will be appreciated that the conveyor 6 may also take other forms in order to provide that the first end of the conveyor forms an empty loading station, for example, the conveyor 6 is moved in its entirety in the direction of the first end, and the conveyor belt is then moved in the direction of the second end, or the loading station may be provided at the first end of the conveyor.

In the technical scheme provided by the invention, in order to improve the stacking production efficiency of the battery strings, two sets of battery string stacking equipment can be arranged, as shown in an embodiment shown in fig. 14, the two sets of battery string stacking equipment are arranged in parallel, and a battery piece conveying device 10 and a pressing tool conveying device 20 can be arranged between the two sets of battery string stacking equipment, wherein the battery piece conveying device 10 provides a battery piece C for a battery piece bearing device 4, and the pressing tool conveying device 20 provides a pressing tool a for a pressing tool bearing device 2. In the embodiment shown in fig. 14, one cell conveying device 10 simultaneously supplies the cell to the cell string stacking apparatuses on both sides, and one pressing tool conveying device 20 simultaneously supplies the pressing tools to the cell string stacking apparatuses on both sides.

In the embodiment shown in fig. 15, two cell sheet conveying devices 10 and two pressing tool conveying devices 20 are arranged between the two sets of cell string stacking devices, each cell sheet conveying device 10 respectively provides a cell sheet for one set of cell string stacking devices, and each pressing tool conveying device respectively provides a pressing tool for one cell string stacking device.

According to another aspect of the present invention, there is also provided a battery string stacking method, which uses one grabbing unit 1 as described above to grab the pressing tool a, the welding strip group B and the battery piece C, and includes:

carrying an ith stacking assembly to the conveying device 6, wherein the stacking assembly comprises a battery piece C, a welding strip group B and a pressing tool A which are sequentially stacked, and i is any natural number greater than 0;

wherein, carry the ith subassembly that stacks to conveyor and include:

controlling the grabbing unit 1 to grab a pressing tool A;

controlling the grabbing unit 1 to clamp one welding strip group B;

controlling the grabbing unit 1 to grab a battery piece C;

controlling the grabbing unit 1 to release the battery cell C, the solder ribbon group B and the pressing tool a on the conveying device 6, wherein a front section part of the solder ribbon group released by the grabbing unit 1 is stacked on the battery cell C, and the pressing tool a is stacked on the front section part of the solder ribbon group;

setting i to i +1, the step of conveying the i-th stacked assembly to the conveying device 6 is continued, and the battery plate C of the i-th stacked assembly is stacked on the rear section portion of the solder ribbon group B of the i-1 th stacked assembly.

Preferably, the gripping units 1 are provided with at least two, and at least two gripping units 1 alternately convey the stacked assemblies onto the conveying device 6.

According to still another aspect of the present invention, there is also provided a battery string stacking method including: each grabbing unit 1 of the grabbing device respectively grabs a compaction tool A, a welding strip group B and a battery piece C, and the compaction tool A, the welding strip group B and the battery piece C grabbed by each grabbing unit 1 form a stacking assembly;

the n stacked assemblies gripped by the gripping device are released on the conveying device 6 so that the battery chip C of the latter stacked assembly is stacked on the rear end portion of the ribbon group B of the former stacked assembly.

Wherein, adopt as above every grabbing unit 1 of grabbing device snatch respectively and compress tightly frock A, weld and take group B and battery piece C, specifically include:

controlling each grabbing unit 1 of the grabbing device to grab a pressing tool A respectively;

controlling a welding strip clamping part 12 of a first grabbing unit 1 of the grabbing device to clamp a plurality of parallel welding strips;

controlling the grabbing device to pull the clamped welding strip to move to a preset position, and enabling each grabbing unit 1 to pick up one battery piece C;

controlling n grabbing units 1 of the grabbing device to be away from each other so that two adjacent grabbing units are spaced by a preset distance, and respectively clamping a solder strip by a solder strip clamping part 12 of each grabbing unit 1; the solder strips are cut corresponding to each of the grasping units 1 so that each grasping unit 1 holds one cut solder strip group.

Wherein, the solder strip clamping part 12 of the first grabbing unit 1 for controlling the grabbing device clamps a plurality of parallel solder strips, and comprises: controlling the first grabbing unit 1 to descend to the height of the solder strip; the welding strip clamping part 12 of the first grabbing unit clamps the welding strip;

the control the grabbing device pulls the clamped welding strip to move to a preset position, and each grabbing unit 1 grabs one battery piece C, and the control method comprises the following steps: the n grabbing units 1 of the grabbing device move to the preset position, and in the moving process, the n grabbing units 1 of the grabbing device are controlled to ascend and descend to the same height; the n grasping units 1 at the same height descend to grasp the cell C.

Wherein, it specifically includes to correspond every grabbing unit 1 cuts the solder strip:

the welding strip is grabbed by a welding strip grabbing hand 5 at the position of the cutting welding strip corresponding to each grabbing unit;

the solder strip is cut at a position close to the solder strip holder 5.

The releasing of the n stacked assemblies, which are gripped by the gripping device, on the conveying device 6 so that the battery chip C of the latter stacked assembly is stacked on the rear end portion of the solder ribbon group B of the former stacked assembly includes:

controlling the ith gripping unit 1 of the gripping device to release the gripped ith stacked component on the conveying device 6;

controlling the (i + 1) th grabbing unit to release the grabbed (i + 1) th stacked assembly, so that the battery plate C of the (i + 1) th stacked assembly is stacked on the rear section part of the solder ribbon group B of the (i) th stacked assembly;

the solder strip gripper 5 for gripping the solder strip group of the ith stacked assembly releases the gripped solder strip group B;

after the nth stacked assembly gripped by the gripping device is released on the conveying device 6, the battery string stacking method further includes: and clamping the welding strip group B of the nth stacked assembly released by the grabbing device through a tail clamp 7 arranged at the end part of the conveying device 6.

When the n stacked assemblies grabbed by the grabbing device are released on the conveying device 6, firstly controlling the n grabbing units of the grabbing device to be lifted from front to back, and enabling the n grabbing units 1 to be close to each other, so that the battery sheet C of the stacked assembly of the next grabbing unit is positioned above the welding strip group B of the previous grabbing unit; and then controlling each grabbing unit to release the grabbed stacked components on the conveying device 6 at the same time, or firstly controlling the ith grabbing unit to place the stacked components on the conveying device 6, then descending the (i + 1) th grabbing unit and then placing the grabbed stacked components on the conveying device 6.

The specific process of stacking the battery strings is described in detail below according to the specific embodiment (as shown in fig. 3-12):

as shown in fig. 3, in this embodiment, the gripping device is provided with three gripping units 1, and each gripping unit 1 of the gripping device is controlled to grip one pressing tool a from the pressing tool carrier 2;

as shown in fig. 4, the grabbing device is controlled to move to the solder strip providing device 3, the first grabbing unit 1 of the grabbing device descends to the height of the solder strip, and the solder strip clamping part 12 of the first grabbing unit 1 clamps the solder strip; before the welding strip is clamped by the grabbing unit 1 or when the welding strip is clamped and pulled to a preset position by the grabbing unit 1, pressing the preset position of the welding strip into a flat or bent structure by the welding strip pressing device;

as shown in fig. 5, the grabbing device pulls the clamped solder strip to move to the cell piece carrying device 4, in the moving process, the three grabbing units 1 of the grabbing device are lifted to the same height, and the three grabbing units 1 at the same height are lowered to the cell piece carrying device 4 to grab the cell piece C;

as shown in fig. 6, removing the cell carrier 4, and controlling three grabbing units 1 of the grabbing device to move away from each other so that two adjacent grabbing units are spaced by a preset distance, and the solder strip clamping part 12 of each grabbing unit 1 clamps the solder strip;

the three welding strip grippers 5 are controlled to respectively correspond to the positions, to be cut, of the grabbing units 1, where the welding strips are grabbed, and then the welding strips are cut, so that each grabbing unit 1 respectively clamps an independent stacking assembly consisting of a pressing tool A, a welding strip group B obtained by cutting and a battery piece C;

then, three of the grasping units 1 of the grasping apparatus are controlled to be arranged to be raised from front to rear, and the three grasping units 1 are brought close to each other so that the cell C of the stacked assembly of the latter grasping unit is positioned above the solder ribbon group B of the former grasping unit, as in the state shown in fig. 7;

controlling the gripping device to move to the conveying device 6, and enabling each stacked component gripped by the gripping device to be released on the conveying device 6 by the conveying belt of the conveying device 6 in a stepping mode towards the gripping device, wherein the specific process comprises the following steps:

as shown in fig. 8, the three gripper units of the gripper device are arranged raised from front to back and the three gripper units 1 are moved to the first end of the conveyor 6 after being brought close to each other (of course, it is also possible that the three gripper units are stacked close to each other after the gripper device has been moved to the first end of the conveyor belt), wherein the stacked assembly gripped by the gripper device is located at a position above the first end of the conveyor belt and at a short vertical distance from the conveyor belt;

the conveyor belt of the conveyor device 6 is stepped by the length of one placing unit in the direction away from the second end (i.e. in the direction towards the gripping device) so that the second gripping unit and the third gripping unit start to descend when the first stacked component part gripped by the first gripping unit of the gripping device is positioned above the conveyor device 6, and the first stacked component is released when the conveyor device 6 is stepped until the first stacked component is fully positioned on the conveyor device 6; when the second grabbing unit is used for piling the battery plate C of the second piled assembly on the rear section part of the solder strip group B of the first piled assembly, as shown in FIG. 9, the solder strip grabbing hand 5 of the first piled assembly is grabbed to release the grabbed solder strip (the solder strip grabbing hand 5 can release the solder strip under the pushing force of the stepping of the conveying belt specifically, or the solder strip grabbing hand is removed manually by other means);

when the conveyor belt of the conveying device 6 continues to step so that the second stacked assembly is completely positioned on the conveying device 6 and the third grabbing unit is used for stacking the battery plate C of the grabbed third stacked assembly on the rear section part of the solder strip group B of the second stacked assembly, as shown in FIG. 10, the solder strip grabber 5 of the second stacked assembly releases the grabbed solder strip;

when the tape is advanced further so that the third nest assembly is fully seated on the conveyor 6, as shown in fig. 11, the tail clamp 7 at the end of the conveyor 6 holds the solder ribbon group B of the third nest assembly and the solder ribbon gripper 5 holding the third nest assembly releases the solder ribbon.

The latter gripping device then continues to release the stacked assembly to the transport device 6.

What has been described above is the case where the conveyor belt is stepped by the length of one depositing unit at a time, forming a loading station of one depositing unit length at the first end of the conveyor belt, in which case the gripping device releases one stacking assembly at a time. It will be appreciated that it is also possible to arrange for the conveyor belt to be stepped by the length of n depositing units at a time, and for the n stacking assemblies gripped by the gripping device to be released at the loading station in one go. The following is also described by taking as an example a case where the gripping apparatus has three gripping units:

specifically, three grabbing units of the grabbing device are arranged in a lifting mode from front to back, and after the three grabbing units 1 are close to each other, the three grabbing units move to the first end of the conveying device 6, and the stacked components grabbed by the grabbing device are above the conveying belt and are close to the conveying belt in vertical distance;

the conveying belt of the conveying device 6 steps the length of the three battery pieces in the direction away from the second end (i.e. in the direction towards the gripping device), the gripping device is pushed by the conveying belt to grip the solder strip grippers 5 of the solder strip, the three solder strip grippers 5 release the solder strip under the action of the pushing force, the feeding station with the length of the three battery pieces of the conveying belt moves to the position below the n stacked assemblies, and the gripping device releases the three stacked assemblies at the feeding station (refer to the state shown in fig. 11), wherein the end part of the solder strip of the last stacked assembly is clamped and positioned by the tail clamp 7 arranged at the end part of the conveying device 6.

The latter gripping device then continues to release the stacked assembly to the transport device 6.

After a predetermined number of stacked components have been placed on the conveyor device 6, the conveyor device conveys the loaded stacked components in the direction of the second end.

What has been described above is that the conveyor belt of the conveyor device 6 causes the respective superposed assemblies gripped by the gripping device to be released in sequence on the conveyor device 6 by stepping in the direction of the gripping device. It will be understood that the release of the respective superimposed assembly by the gripping device can also be carried out by stepping the conveyor belt of the conveyor device 6 away from the gripping device, in such a way that the gripping device releases the respective superimposed assembly as follows;

the first gripping unit of the gripping device releases the first superposed assembly at the end of the conveyor device 6;

during the process that the first grabbing unit releases the first stacked assembly, the second grabbing unit and the third grabbing unit descend, then the second grabbing unit stacks the battery plate of the second stacked assembly on the rear section part of the welding strip group of the first stacked assembly, the conveying device 6 is stepped forwards to enable the second stacked assembly to be completely moved to the conveying device 6, during the process, the welding strip gripper 5 grabbing the first stacked assembly releases the grabbed welding strip, and the welding strip gripper 5 can be separated from the welding strip when the stacked assembly is carried by the conveying belt to move towards the direction far away from the grabbing device;

when the conveyor belt is stepped until the second stacked assembly is completely placed on the conveyor device 6, the third grasping unit stacks the battery chip C of the third stacked assembly on the rear portion of the solder ribbon group of the second stacked assembly, in the process, the solder ribbon gripper 5 of the second stacked assembly grasps the solder ribbon to release the grasped solder ribbon,

the conveying belt of the conveying device 6 is stepped forward again, the third stacking assembly is completely moved onto the conveying device 6, at the moment, the rear section part of the solder strip group B of the third stacking assembly is clamped by a tail clamp 7 arranged at the end part of the conveying device 6, and the solder strip gripper 5 for clamping the third stacking assembly releases the clamped solder strip.

In order to improve the stacking efficiency of the battery strings, the battery string stacking device can be provided with at least two gripping devices, and the at least two gripping devices alternately release the gripping and stacking assemblies on the conveying device.

Further, as shown in fig. 12, the conveying device 6 conveys the stacked individual stacked assemblies to below the hot press device 8, and the stacked assemblies are hot pressed by the hot press device 8, so that the stacked battery plates and the solder ribbon groups are fixed together.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the individual specific technical features in any suitable way. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims (22)

1. The grabbing unit is characterized by comprising a pressing tool grabbing component, a battery piece grabbing component and a welding strip clamping component, wherein the pressing tool grabbing component is used for grabbing a pressing tool;

the grabbing unit is arranged in such a way that after the compaction tool grabbing component grabs the compaction tool, the welding strip clamping component clamps the head end of one welding strip group at one end of the compaction tool, and the battery piece grabbing component grabs the battery piece below the welding strip group; the front section part of the welding strip group close to the head end is positioned between the pressing tool and the battery piece, and the rear section part of the welding strip group extends beyond the battery piece; after the grabbing unit releases the pressing tool, the welding strip group and the battery piece, the front section part of the welding strip group is overlapped on the battery piece, and the pressing tool is overlapped on the front section part of the welding strip to position the welding strip group.

2. The grasping unit according to claim 1, wherein the hold-down tool grasping member is configured to be capable of attracting the hold-down tool;

and/or the battery piece grabbing part is arranged to be capable of adsorbing the battery piece.

3. The grasping unit according to claim 1, wherein the grasping tool grasping member includes an electromagnet for attracting the pressing tool;

and/or the battery piece grabbing part comprises a plurality of suckers for sucking the battery pieces.

4. A gripping apparatus, characterized in that the gripping apparatus comprises n gripping units according to any one of claims 1-3, the n gripping units being arranged in a straight line and the n gripping units being arranged to be able to move away from and towards each other along a straight line; the (i + 1) th grabbing unit is located at one end, far away from the solder strip clamping part of the ith grabbing unit, wherein n is any natural number larger than 1, and i is any natural number from 1 to n-1.

5. The grasping apparatus according to claim 4, wherein the grasping apparatus further comprises a cutting mechanism provided near the (i + 1) th grasping unit for cutting the solder ribbon held by the (i) th grasping unit.

6. The grasping apparatus according to claim 4 or 5, wherein n of the grasping units are provided so as to be capable of being arranged in order from high to low.

7. A battery string stacking apparatus, characterized in that the battery string stacking apparatus comprises: the pressing tool bearing device, the battery piece bearing device, the welding strip providing device, the conveying device and the grabbing device according to claim 4; the pressing tool bearing device is used for bearing n pressing tools; the battery piece bearing device is used for bearing n battery pieces, and the welding strip providing device is used for providing a plurality of parallel welding strips;

after each grabbing unit of the grabbing device respectively grabs a compaction tool from the compaction tool bearing device, a welding strip clamping part of a first grabbing unit of the grabbing device clamps a plurality of welding strips from the welding strip providing device and pulls the clamped welding strips to move to the upper side of the battery piece bearing device, and each grabbing unit grabs a battery piece from the battery piece bearing device;

after the n grabbing units of the grabbing device grab the battery pieces and then are far away from each other, so that two adjacent grabbing units are spaced by a preset distance, and after a welding strip is respectively clamped by a welding strip clamping part of each grabbing unit, the welding strip is cut corresponding to each grabbing unit, so that each grabbing unit grabs a stacking assembly formed by stacking the battery pieces, a plurality of cut welding strips and a pressing tool;

the stacked assembly gripped by the n gripping units of the gripping device is released on the conveying device, wherein the battery plate of the next stacked assembly is stacked on the rear section part of the solder ribbon group of the previous stacked assembly.

8. The battery string stacking apparatus according to claim 7, further comprising a solder ribbon gripper provided corresponding to each of the gripping units of the gripping device, the solder ribbon gripper being configured to grip a solder ribbon at a cutting position when cutting the solder ribbon, and to grip the solder ribbon during the gripping device moves the gripped stacking assembly onto the conveying device.

9. The battery string stacking apparatus according to claim 8, wherein each of the solder ribbon grips is provided with a solder ribbon cutting member for cutting a solder ribbon.

10. The battery string stacking apparatus according to claim 7, wherein the solder strip providing device comprises one or at least two solder strip pressing devices arranged at intervals along the length direction of the solder strip, and the solder strip pressing devices are configured to press the pulled solder strip, so that the middle part of the solder strip obtained by each grabbing unit after cutting is pressed into a flat or bent structure.

11. The battery string stacking apparatus according to claim 7, further comprising a solder ribbon cutting part provided near the (i + 1) th grasping unit, the solder ribbon held by the (i) th grasping unit being cut by the solder ribbon cutting part near the (i + 1) th grasping unit;

the battery string stacking equipment further comprises a cutting mechanism, and the welding strip grabbed by the nth grabbing unit is cut by the cutting mechanism.

12. The battery string stacking apparatus according to any one of claims 7 to 11, wherein a tail clamp is provided at one end of the conveying device, and the tail end of the solder ribbon of the stacked assembly is clamped and positioned by the tail clamp after the n-th grasping unit of the grasping device releases the held stacked assembly on the conveying device.

13. The battery string stacking apparatus according to any one of claims 7 to 11, wherein the battery string stacking apparatus is provided with at least two of the gripping devices, which alternately release the gripped stacked assembly on the conveying device.

14. A method of stacking a battery string, the method comprising:

carrying an ith stacking assembly to a conveying device, wherein the stacking assembly comprises a battery plate, a welding strip group and a pressing tool which are sequentially stacked, and i is any natural number greater than 0;

wherein, carry the ith subassembly that stacks to conveyor and include:

controlling the gripping unit of any one of claims 1-3 to grip a compaction tool;

controlling the grabbing unit to clamp one welding strip group;

controlling the grabbing unit to grab a battery piece;

controlling the grabbing unit to release the battery plate, the solder strip group and the pressing tool on the conveying device, wherein a front section part of the solder strip group released by the grabbing unit is overlapped on the battery plate, and the pressing tool is overlapped on the front section part of the solder strip group;

setting i as i +1, continuing the step of conveying the ith stacking assembly to the conveying device, and stacking the battery plate of the ith stacking assembly on the rear section part of the welding strip group of the (i-1) th stacking assembly.

15. The method of claim 14, wherein at least two of the plurality of gripper units are provided, and wherein at least two of the plurality of gripper units alternately convey the stacked assembly onto the conveyor.

16. A method of stacking a battery string, the method comprising: adopting each grabbing unit of the grabbing device of any one of claims 4 to 6 to grab a pressing tool, a welding strip group and a battery piece respectively, wherein the pressing tool, the welding strip group and the battery piece grabbed by each grabbing unit form a stacked assembly;

and releasing the n stacked assemblies grabbed by the grabbing device on a conveying device, so that the battery plate of the next stacked assembly is stacked on the rear section part of the welding strip group of the previous stacked assembly.

17. The method for stacking the battery strings according to claim 16, wherein each of the grabbing units adopting the grabbing device of any one of claims 4 to 6 respectively grabs the pressing tool, the solder ribbon group and the battery piece, and comprises:

controlling each grabbing unit of the grabbing device to grab a pressing tool respectively;

controlling a welding strip clamping component of a first grabbing unit of the grabbing device to clamp a plurality of parallel welding strips;

controlling the grabbing device to pull the clamped welding strip to move to a preset position, and enabling each grabbing unit to pick up one battery piece;

controlling the n grabbing units of the grabbing device to be away from each other so that two adjacent grabbing units are spaced by a preset distance, and respectively clamping the welding strip by a welding strip clamping part of each grabbing unit;

and cutting the solder strips corresponding to each grabbing unit, so that each grabbing unit clamps one cut solder strip group.

18. The method of claim 17, wherein controlling the solder ribbon holding member of the first grasping unit of the grasping device to hold a plurality of parallel solder ribbons comprises:

controlling the first grabbing unit to descend to the height of the solder strip; the welding strip clamping component of the first grabbing unit clamps the welding strip;

the control the grabbing device pulls the solder strip that is held to move to preset position to make every the unit of grabbing snatch a battery piece, include:

the n grabbing units of the grabbing device move to the preset position, and in the moving process, the n grabbing units of the grabbing device are controlled to ascend and descend to the same height;

and the n grabbing units at the same height descend to grab the battery piece.

19. The battery string stacking method according to claim 17, wherein the cutting of the solder ribbon corresponding to each of the grasping units includes:

grabbing the solder strip by a solder strip gripper at the position of the cut solder strip corresponding to each grabbing unit;

and cutting the welding strip at a position close to the welding strip gripper.

20. The battery string stacking method according to claim 19, wherein the releasing the n stacked assemblies, which are gripped by the gripping device, on the conveying device so that the battery piece of the latter stacked assembly is stacked on the rear end portion of the tab group of the former stacked assembly, comprises:

controlling an ith grabbing unit of the grabbing device to release the grabbed ith stacked assembly on the conveying device;

controlling the (i + 1) th grabbing unit to release the grabbed (i + 1) th stacked assembly, so that the battery plate of the (i + 1) th stacked assembly is stacked on the rear section part of the welding strip group of the (i) th stacked assembly;

the solder strip gripper clamping the solder strip group of the ith stacked assembly releases the captured solder strip group;

after the nth stacked assembly gripped by the gripping device is released on the conveying device, the battery string stacking method further includes: and clamping the solder strip group of the nth stacked assembly released by the grabbing device through a tail clamp arranged at the end part of the conveying device.

21. The battery string stacking method according to any one of claims 16 to 19, wherein the releasing the stacked n assemblies gripped by the gripping device on a conveying device includes:

controlling the n grabbing units of the grabbing device to be arranged in a lifting mode from front to back, and enabling the n grabbing units to be close to each other, so that the battery piece of the stacked assembly of the following grabbing unit is located above the welding strip group of the previous grabbing unit;

controlling a first end of a conveying belt of the conveying device to extend for the length of one placing unit step by step along the direction far away from a second end, and forming a feeding station with the length of one placing unit at the first end;

and the first end of the conveying belt extends for the length of one placing unit in a stepping mode in the direction away from the second end, the gripping device is controlled to release one stacking assembly on the feeding station until the n stacking assemblies are all released on the conveying device.

22. The battery string stacking method according to any one of claims 16 to 19, wherein the releasing the stacked n assemblies gripped by the gripping device on a conveying device includes:

controlling the n grabbing units of the grabbing device to be arranged in a lifting mode from front to back, and enabling the n grabbing units to be close to each other, so that the battery piece of the stacked assembly of the following grabbing unit is located above the welding strip group of the previous grabbing unit;

controlling the first end of a conveying belt of the conveying device to extend the length of the n placing units in a stepping mode along the direction far away from the second end, and forming an empty feeding station at the first end;

the grabbing device places the n grabbed stacked assemblies to the feeding station.

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