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

Abstract

The present invention discloses a grabbing unit, a grabbing device, a battery string stacking device and a battery string stacking method, wherein the grabbing unit comprises a clamping tool grabbing component for grabbing a clamping tool, a battery cell grabbing component for grabbing a battery cell and a welding strip clamping component for clamping a welding strip group; wherein the grabbing unit is configured such that after the clamping tool grabbing component grabs the clamping tool, the welding strip clamping component clamps the head end of the welding strip group at one end of the clamping tool, and the battery cell grabbing component grabs the battery cell located below the welding strip group; wherein the front section of the welding strip group close to the head end is located between the clamping tool and the battery cell, and the rear section of the welding strip group extends beyond the battery cell; after the grabbing unit releases the clamping tool, the welding strip group and the battery cell, the front section of the welding strip group is stacked on the battery cell, and the clamping tool is stacked on the front section of the welding strip to position the welding strip group. The technical solution provided by the present invention can greatly improve the stacking efficiency of battery strings in battery string production.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic cell self-production, and in particular to a grabbing unit, a grabbing device, a battery string stacking device and a battery string stacking method. Background Art

[0002] In the production process of photovoltaic cells, there is a process of using cell string welding equipment to weld cell cells and welding ribbons to form cell strings.

[0003] Before welding to form a battery string, the battery cells and welding ribbons are first stacked. The traditional way of stacking the battery cells and welding ribbons is to respectively transport the welding ribbons to a conveying device through a welding ribbon transporting device and transport the battery cells through a battery cell transporting device, so that the welding ribbons and battery cells are stacked in sequence on the conveying device.

[0004] However, the current stacking method of battery cells and welding ribbons is inefficient, which affects the production cycle of battery components. Summary of the invention

[0005] The object of the present invention is to provide a grasping unit, a grasping device, a battery string stacking device and a battery string stacking method to improve the stacking efficiency of battery cells and welding strips.

[0006] In order to achieve the above-mentioned object, the present invention provides a gripping unit, the gripping unit comprising a clamping tool gripping component for gripping a clamping tool, a cell gripping component for gripping a cell, and a solder strip clamping component for clamping a solder strip group, wherein the solder strip group comprises a plurality of parallel solder strips;

[0007] Wherein, the grasping unit is configured such that after the clamping tool grasping component grasps the clamping tool, the solder ribbon clamping component clamps a head end of the solder ribbon group at one end of the clamping tool, and the battery cell grasping component grasps the battery cell located below the solder ribbon group; wherein the front section of the solder ribbon group close to the head end is located between the clamping tool and the battery cell, and the rear section of the solder ribbon group extends beyond the battery cell; after the grasping unit releases the clamping tool, the solder ribbon group and the battery cell, the front section of the solder ribbon group is stacked on the battery cell, and the clamping tool is stacked on the front section of the solder ribbon to position the solder ribbon group.

[0008] Preferably, the clamping tool grabbing component is configured to be able to absorb the clamping tool;

[0009] And / or, the battery cell grasping component is configured to be able to absorb the battery cell.

[0010] Preferably, the clamping tool grabbing component comprises an electromagnet for adsorbing the clamping tool;

[0011] And / or, the battery cell grasping component includes a plurality of suction cups for adsorbing the battery cell.

[0012] According to another aspect of the present invention, there is further provided a gripping device, comprising n gripping units as described above, wherein the n gripping units are arranged in a straight line and are configured to be able to move away from and approach each other along a straight line; wherein the i+1th gripping unit is located at an end of the i-th gripping unit away from the welding strip clamping component of the i-th gripping unit, wherein n is any natural number greater than 1, and i is any natural number from 1 to n-1.

[0013] Preferably, the gripping device further comprises a cutting mechanism arranged close to the (i+1)th gripping unit and used for cutting the welding strip clamped by the (i)th gripping unit.

[0014] Preferably, the n grabbing units are configured to be arranged in sequence from high to low.

[0015] According to another aspect of the present invention, there is further provided a battery string stacking device, the battery string stacking device comprising: a pressing tool bearing device, a battery cell bearing device, a welding strip providing device, a conveying device and the grasping device as described above; the pressing tool bearing device is configured to carry n pressing tools; the battery cell bearing device is configured to carry n battery cells, and the welding strip providing device is configured to provide a plurality of parallel welding strips;

[0016] Wherein, after each grabbing unit of the grabbing device grabs a pressing tool from the pressing tool carrying device, the solder strip clamping component of the first grabbing unit of the grabbing device grabs a plurality of solder strips from the solder strip providing device, and pulls the clamped solder strips to move above the battery cell carrying device, and each of the grabbing units grabs a battery cell from the battery cell carrying device;

[0017] After the n grasping units of the grasping device grasp the battery cells, they move away from each other so that two adjacent grasping units are spaced by a preset distance, and after the solder strip clamping components of each grasping unit clamp the solder strips respectively, each grasping unit cuts the solder strips accordingly, so that each grasping unit grasps a stacked assembly formed by stacking the battery cells, a plurality of cut solder strips and a pressing tool;

[0018] The stacked assemblies grasped by the n grasping units of the grasping device are released onto the conveying device, wherein the battery cells of a subsequent stacked assembly are stacked on the rear section of the welding ribbon group of a previous stacked assembly.

[0019] Preferably, the battery string stacking equipment also includes a solder strip gripper arranged corresponding to each gripping unit of the gripping device, and the solder strip gripper is arranged to grip the tail of the solder strip at the cutting position when cutting the solder strip, and when the gripping device moves the gripped stacking assembly to the conveying device, the solder strip gripper clamps the tail of the solder strip.

[0020] Preferably, each of the solder strip grippers is provided with a solder strip cutting component for cutting the solder strip.

[0021] Preferably, the solder strip providing device includes 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 device is configured to press the pulled solder strip so that the middle part of the solder strip obtained by each of the grabbing units after cutting is pressed into a flat or bent structure.

[0022] Preferably, the battery string stacking device further comprises a solder strip cutting component arranged close to the i+1th grabbing unit, and the solder strip clamped by the i-th grabbing unit is cut by the solder strip cutting component close to the i+1th grabbing unit;

[0023] The battery string stacking device further includes a cutting mechanism, and the welding strip grasped by the nth grasping unit is cut by the cutting mechanism.

[0024] Preferably, a tail clamp is provided at one end of the conveying device, and after the nth grasping unit of the grasping device releases the stacking assembly it holds onto the conveying device, the tail end of the welding ribbon of the stacking assembly is clamped and positioned by the tail clamp.

[0025] Preferably, the battery string stacking equipment is provided with at least two grasping devices, and the at least two grasping devices alternately release the grasped stacking components onto the conveying device.

[0026] According to another aspect of the present invention, a battery string stacking method is also provided, the battery string stacking method comprising:

[0027] Carrying the i-th stacked assembly onto the conveying device, the stacked assembly comprising sequentially stacked battery cells, welding ribbon groups and pressing fixtures, where i is any natural number greater than 0;

[0028] Wherein, the step of conveying the i-th stacked component onto the conveying device comprises:

[0029] Controlling the grabbing unit as described above to grab a pressing tool;

[0030] Controlling the grabbing unit to clamp a welding ribbon group;

[0031] Controlling the grabbing unit to grab a battery cell;

[0032] Controlling the grabbing unit to release the battery cell, the welding ribbon group and the pressing tool onto the conveying device, wherein the front section of the welding ribbon group released by the grabbing unit is stacked on the battery cell, and the pressing tool is stacked on the front section of the welding ribbon group;

[0033] Set i to i+1, continue to execute the step of conveying the i-th stacking assembly to the conveying device, and stack the battery cells of the i-th stacking assembly on the rear section of the welding ribbon group of the i-1-th stacking assembly.

[0034] Preferably, at least two of the grabbing units are provided, and the at least two grabbing units take turns to carry the stacking assembly onto the conveying device.

[0035] According to another aspect of the present invention, there is further provided a battery string stacking method, the battery string stacking method comprising: using each grabbing unit of the grabbing device as described above to grab a pressing tool, a welding ribbon group and a battery cell respectively, the pressing tool, the welding ribbon group and the battery cell grabbed by each of the grabbing units forming a stacking assembly;

[0036] The n stacked assemblies grasped by the grasping device are released onto the conveying device, so that the battery cells of the latter stacked assembly are stacked on the rear section of the welding ribbon group of the former stacked assembly.

[0037] Preferably, each grabbing unit of the grabbing device as described above grabs the pressing tool, the welding ribbon group and the battery cell respectively, including:

[0038] Control each grabbing unit of the grabbing device to grab a pressing tool respectively;

[0039] Controlling the solder strip clamping component of the first gripping unit of the gripping device to clamp a plurality of parallel solder strips;

[0040] Controlling the gripping device to pull the clamped solder strip to a preset position, and allowing each of the gripping units to pick up a battery cell;

[0041] Controlling the n grabbing units of the grabbing device to move away from each other so that two adjacent grabbing units are spaced apart by a preset distance, and the solder strip clamping components of each grabbing unit clamp the solder strip respectively;

[0042] The welding strips are cut corresponding to each of the grabbing units, so that each grabbing unit clamps a welding strip group formed by cutting.

[0043] Preferably, controlling the solder strip clamping component of the first gripping unit of the gripping device to clamp a plurality of parallel solder strips comprises:

[0044] Control the first grabbing unit to descend to the height where the soldering strip is located; the soldering strip clamping component of the first grabbing unit clamps the soldering strip;

[0045] The controlling the grasping device to pull the clamped welding strip to a preset position and making each grasping unit grasp a battery sheet includes:

[0046] The n grabbing units of the grabbing device move to the preset position, and during the movement, the n grabbing units of the grabbing device are controlled to rise and fall to the same height;

[0047] The n grabbing units at the same height descend to grab the battery sheet.

[0048] Preferably, the corresponding each of the grabbing units cuts the welding strip, including:

[0049] Grab the soldering tape by using the soldering tape gripper at the position where each grabbing unit cuts the soldering tape;

[0050] The soldering ribbon is cut at a position close to the soldering ribbon gripper.

[0051] Preferably, the step of releasing the n stacked assemblies grasped by the grasping device onto a conveying device so that the battery sheet of a subsequent stacked assembly is stacked on the rear section of the welding ribbon group of a previous stacked assembly comprises:

[0052] Controlling the i-th grabbing unit of the grabbing device to release the grabbed i-th stacking component onto the conveying device;

[0053] Controlling the i+1th grabbing unit to release the grabbed i+1th stacking assembly, so that the battery cell of the i+1th stacking assembly is stacked on the rear section of the welding ribbon group of the ith stacking assembly;

[0054] The solder ribbon gripper holding the solder ribbon group of the i-th stacked component releases the gripped solder ribbon group;

[0055] After the nth stacking assembly grasped by the grasping device is released on the conveying device, the battery string stacking method further comprises: clamping the welding ribbon group of the nth stacking assembly released by the grasping device by a tail clamp arranged at the end of the conveying device.

[0056] Preferably, the step of releasing the n stacked components grasped by the grasping device onto a conveying device comprises:

[0057] Controlling the n grabbing units of the grabbing device to be raised and arranged from front to back, and the n grabbing units are close to each other, so that the battery sheet of the stacked assembly of the latter grabbing unit is located above the welding ribbon group of the former grabbing unit;

[0058] Control the first end of the conveyor belt of the conveying device to extend step by step in a direction away from the second end by the length of a placement unit each time, so as to form a loading station with a length of a placement unit at the first end;

[0059] The first end of the conveyor belt is extended in a direction away from the second end by the length of a placement unit each time, and the gripping device is controlled to release a stacking assembly on the loading station until n stacking assemblies are released on the conveying device.

[0060] Preferably, the step of releasing the n stacked components grasped by the grasping device onto a conveying device comprises:

[0061] Controlling the n grabbing units of the grabbing device to be raised and arranged from front to back, and the n grabbing units are close to each other, so that the battery sheet of the stacked assembly of the latter grabbing unit is located above the welding ribbon group of the former grabbing unit;

[0062] Controlling the first end of the conveyor belt of the conveying device to extend stepwise in a direction away from the second end by the length of n placement units, so as to form an empty loading station at the first end;

[0063] The grasping device places the grasped n stacking components into the loading station.

[0064] In the technical solution provided by the present invention, each grasping unit can grasp the stacked pressing tooling, welding ribbon group and battery cells at one time, thereby releasing the stacked assembly consisting of the pressing tooling, welding ribbon group and battery cells as a whole, thereby greatly improving the stacking efficiency of battery cells and welding ribbons during the battery string production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 A gripping device having three gripping units according to one embodiment of the present invention;

[0066] Figure 2 for Figure 1 The schematic diagram of the gripping device gripping a clamping tool is shown;

[0067] Figure 3 A schematic diagram of a gripping device gripping a clamping tool from a clamping tool carrying device and moving toward a welding strip providing device according to an embodiment of the present invention;

[0068] Figure 4 A schematic diagram of a first gripping unit of a gripping device gripping a welding strip;

[0069] Figure 5 A schematic diagram of three grabbing units of the grabbing device pulling the welding ribbon to the battery cell carrier and grabbing the battery cell from the battery cell carrier;

[0070] Figure 6 A schematic diagram of the gripping devices being separated from each other by a preset distance after gripping the battery sheet, and the solder strip gripper gripping the solder strip to be cut;

[0071] Figure 7 It is a schematic diagram of the height arrangement of three grabbing units of the grabbing device;

[0072] Figure 8-Figure 11 A schematic diagram of a grasping device gradually releasing a plurality of grasped stacked components onto a conveying device;

[0073] Fig.12 A schematic diagram of a conveying device conveying the stacked components toward a hot pressing device after the gripping device releases the stacked components on the conveying device;

[0074] Fig.13 It is a structural schematic diagram of a conveying device;

[0075] Fig.14 A schematic diagram of providing battery cells and a pressing tool to battery string production equipment on both sides through a battery cell conveying device and a pressing tool conveying device according to one embodiment of the present invention;

[0076] Fig.15 A schematic diagram of providing battery cells and a pressing tool to a battery string production device on both sides through a battery cell conveying device and a pressing tool conveying device according to another embodiment of the present invention.

[0077] Description of Reference Numerals

[0078] 1-grabbing unit; 11-clamping tool grabbing component; 12-welding strip clamping component; 13-cell grabbing component; 2-clamping tool carrying device; 3-welding strip providing device; 31-cutting mechanism; 32-welding strip pressing device; 4-cell carrying device; 5-welding strip gripper; 6-conveyor device; 61-conveyor belt; 62-base; 63-stepping platform; 631-mounting bracket; 64-fixed platform; 65-conveyor belt driving mechanism; 651-active roller; 652-first guide roller; 653-second guide roller; 654-tensioning roller; 7-tail clamp; 8-hot pressing device; 10-cell conveyor device; 20-clamping tool conveyor device. DETAILED DESCRIPTION

[0079] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present disclosure will be more comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0080] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known structures, methods, devices, implementations, materials or operations are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0081] For ease of description, spatially relative terms such as "upper", "lower", "left", "right", etc. may be used herein to describe the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the elements described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can also be positioned in other ways, such as rotated 90 degrees or in other orientations, and the spatially relative descriptions used here can be interpreted accordingly.

[0082] The present invention provides a grabbing unit, such as Figure 1 As shown ( Figure 1 Three gripping units 1 are shown. The gripping unit 1 comprises a clamping fixture gripping component 11 for gripping a clamping fixture, a cell gripping component 13 for gripping a cell, and a solder strip clamping component 12 for clamping a solder strip group, wherein the solder strip group comprises a plurality of parallel solder strips;

[0083] Wherein, the grabbing unit is configured such that after the clamping tool grabbing component 11 grabs the clamping tool, the solder strip clamping component 12 clamps the head end of the solder strip group at one end of the clamping tool, and the battery cell grabbing component 13 grabs the battery cell located below the solder strip group; wherein the front section of the solder strip group close to the head end is located between the clamping tool and the battery cell, and the rear section of the solder strip group extends beyond the battery cell; after the grabbing unit releases the clamping tool, the solder strip group and the battery cell, the front section of the solder strip group is stacked on the battery cell, and the clamping tool is stacked on the front section of the solder strip group to position the solder strip group.

[0084] In one embodiment of the present invention, the clamping tool grabbing component 11 is configured to be able to absorb the clamping tool. Preferably, the clamping tool grabbing component 11 is an electromagnet, which can absorb the clamping tool when the electromagnet is powered on and release the clamping tool when the power is off. Figure 2 It shows the state that the clamping tool grabbing component 11 absorbs the clamping tool A;

[0085] The welding strip clamping component 12 may include a plurality of clamping claws, each clamping claw clamping a welding strip;

[0086] The cell gripping component 13 is configured to be able to absorb the cell. Preferably, the cell gripping component 13 includes a plurality of suction cups for absorbing the cell.

[0087] The grabbing unit provided by the present invention can grab the pressing tool, the welding ribbon group and the battery cell at one time, and the grabbed pressing tool, welding ribbon group and battery cell are stacked in sequence to form a stacking assembly. When producing a battery string, the stacking assembly grabbed by the latter grabbing unit is released on the rear section of the welding ribbon group of the stacking assembly released by the former grabbing unit to realize the stacking of the welding ribbon group and the battery cell, and the stacked welding ribbon group and the battery cell are pressed and positioned by the pressing tool. Therefore, the use of the grabbing unit to stack the welding ribbon group and the battery cell has high production efficiency.

[0088] According to another aspect of the present invention, a gripping device is provided, the gripping device comprising n gripping units 1 as described above, the n gripping units 1 being arranged in a straight line and being arranged to be able to move away from and approach each other along the straight line, so that the gripping device can simultaneously grip n stacked assemblies consisting of a clamping tool A, a welding ribbon group B and a battery cell C. Figure 1 The gripping device shown comprises three gripping units 1 which can grip three stacked components at a time.

[0089] Among them, the i+1th grabbing unit is located at the end of the i-th grabbing unit away from the solder tape clamping component 12 of the i-th grabbing unit, so that when the solder tape clamping component 12 of the i-th grabbing unit clamps the head end of the solder tape group B, the tail end of the solder tape group B extends toward the i+1th grabbing unit; wherein, n is any natural number greater than 1, and i is any natural number from 1 to n-1.

[0090] In a preferred embodiment, the gripping device further comprises a cutting mechanism disposed near the (i+1)th gripping unit for cutting the solder strip clamped by the (i)th gripping unit, so that the solder strip clamped by the (i)th gripping unit can be cut by the cutting mechanism.

[0091] Preferably, a cutting mechanism for cutting the solder strip clamped by the i-th grabbing unit can be arranged at the solder strip clamping component 12 of the i+1-th grabbing unit. When the solder strip clamping component 12 of the i-th grabbing unit clamps the solder strip, the cutting mechanism close to the i+1-th grabbing unit cuts the solder strip at the tail end to obtain the solder strip group of the i-th grabbing unit.

[0092] Preferably, the n grabbing units 1 are arranged in sequence from high to low, so that after the n grabbing units 1 grab a stacked assembly consisting of a clamping tool A, a welding ribbon group B and a battery cell C respectively, they are close to each other in a high-low arrangement state, such as Figure 7 As shown, the battery cells of the stacked assembly grasped by the i+1th grasping unit can be stacked on the rear section of the soldering ribbon group of the stacked assembly grasped by the i-th grasping unit, so that when the grasping device releases the grasped n stacked assemblies, the n stacked assemblies are already in a stacked state, and the stacking of battery cells and soldering ribbons can be achieved by releasing them downwards.

[0093] According to another aspect of the present invention, a battery string stacking device is further provided, the battery string stacking device comprising: a pressing tool bearing device 2, a battery cell bearing device 4, a welding strip providing device 3, a conveying device 6 and the grasping device as described above; the pressing tool bearing device 2 is configured to carry n pressing tools A; the battery cell bearing device 4 is configured to carry n battery cells C, and the welding strip providing device 3 is used to provide multiple parallel welding strips;

[0094] Each of the gripping units 1 of the gripping device grips a clamping tool A (such as Figure 3 After that, the solder strip clamping component 12 of the first gripping unit 1 of the gripping device clamps a plurality of parallel solder strips (such as Figure 4 As shown), the clamped welding strip is pulled to move above the battery cell carrying device 4, and each of the grabbing units 1 grabs a battery cell C from the battery cell carrying device 4 (as shown Figure 5 shown),

[0095] After the n grabbing units 1 of the grabbing device grab the battery cell C, Figure 6 As shown, the battery cell carrying device 4 is moved away from the bottom of the grasping device, and the n grasping units 1 are moved away from each other so that two adjacent grasping units 1 are spaced a preset distance apart. After the solder strip clamping components 12 of each grasping unit clamp the solder strip respectively, the solder strip is cut corresponding to each grasping unit 1, so that each grasping unit 1 grasps a stacked assembly formed by stacking a battery cell C, multiple cut solder strips and a clamping tool A.

[0096] In a specific embodiment, preferably, Figure 5 and Figure 6 As shown, the battery string stacking device also includes a solder strip gripper 5 arranged corresponding to each gripping unit 1 of the gripping device, and the solder strip gripper 5 is arranged to grip the solder strip at the cutting position when cutting the solder strip, so as to facilitate cutting, and in the process of the gripping device gripping the stacking assembly and moving it to the conveying device, the solder strip gripper 5 clamps the solder strip of the corresponding gripping unit 1.

[0097] In order to cut the solder strip provided by the solder strip providing device 3, the battery string stacking device further includes a solder strip cutting component arranged near the i+1th grabbing unit 1; thus, the solder strip clamped by the i-th grabbing unit is cut by the solder strip cutting component near the i+1th grabbing unit, and the battery string stacking device further includes a cutting mechanism, and the solder strip grasped by the n-th grabbing unit is cut by the cutting mechanism, such as Figure 6 The solder strip grasped by the third grasping unit is cut by the cutting mechanism 31 in the solder strip providing device 3.

[0098] Specifically, Figure 6 In the embodiment, after each soldering strip gripper 5 grips the soldering strip at the corresponding position, the soldering strip clamped by the first gripping unit on the far right is cut by the soldering strip cutting component arranged near the second gripping unit, the soldering strip clamped by the second gripping unit is cut by the soldering strip cutting component arranged near the third gripping unit, and the soldering strip clamped by the third gripping unit is cut by the cutting mechanism 31, so that each gripping unit can obtain a cut soldering strip group. The head end of the soldering strip group cut by each gripping unit is clamped by the soldering strip clamping component 12, and the tail end is clamped by the corresponding soldering strip gripper 5, and then each soldering strip gripper 5 moves with the gripping device to the conveying device 6 to release the gripped stacked components.

[0099] Those skilled in the art can understand that a solder strip cutting component for cutting the solder strip can also be provided on each solder strip gripper 5. Specifically, when cutting the solder strip, each solder strip gripper 5 grabs the solder strip of the corresponding grabbing unit and cuts it by the solder strip cutting component provided on the solder strip gripper 5.

[0100] In this embodiment, preferably, the solder strip providing device 3 includes one or at least two solder strip pressing devices 32 arranged at intervals along the length direction of the solder strip, and the solder strip pressing device 32 is configured to press the pulled solder strip so that the middle part of the solder strip obtained by each of the grabbing units after cutting is pressed into a flat or bent structure. Figure 3 and Figure 4 As shown, three welding strip pressing devices 32 are arranged at intervals along the length direction of the welding strip pulled by the first grabbing unit, that is, each welding strip pressing device 32 presses the welding strip to be grabbed by a grabbing unit, or only one welding strip pressing device 32 is arranged, and the welding strip pressing device 32 presses the welding strip multiple times in sequence. Among them, the middle part of the welding strip to be grabbed by each grabbing unit pressed by the welding strip pressing device 32 refers to the part located between two adjacent battery cells when the welding strip and the battery cell are stacked. In this embodiment, the welding strip pressing device 32 is used to press the middle part of the welding strip into a flat or bent structure, which can prevent the battery cell located below the front section of the welding strip and the battery cell located above the rear section of the welding strip from being deformed or damaged by the pressing in the middle part.

[0101] After cutting the solder strip so that each grabbing unit 1 grabs a stacked assembly formed by stacking the battery cell C, the cut solder strip and the pressing tool A, Figure 8-Figure 11 As shown, the stacked components grasped by the n grasping units 1 of the grasping device are released on the conveying device 6 in sequence, wherein the battery cell C of the latter stacked component is stacked on the rear section of the welding strip of the former stacked component.

[0102] Among them, preferably, after each grasping unit 1 of the grasping device grasps a stacking component respectively, n grasping units 1 that are far away from each other are first arranged to rise from front to back, and then approach each other, so that the battery cell C of the stacking component grasped by the latter grasping unit is stacked on the rear section of the welding strip group B of the stacking component grasped by the former grasping unit. After the stacking components grasped by the n grasping units of the grasping device are stacked close to each other, the stacking components are placed on the conveying device 6.

[0103] Preferably, a tail clamp 7 is provided at one end of the conveying device 6 , and after the nth grasping unit of the grasping device releases the stacking assembly it holds onto the conveying device 6 , the tail end of the welding ribbon of the stacking assembly is clamped and positioned by the tail clamp 7 .

[0104] In this embodiment, the conveying device 6 includes a conveyor belt and a conveyor belt driving mechanism for driving the conveyor belt to operate, and the first end of the conveyor belt is configured to be able to stepwise extend in a direction away from the second end and to stepwise return in the direction of the second end, wherein the conveyor belt extends a predetermined length in each step in the direction away from the second end, and the conveyor belt forms an empty loading station at the first end, and the stacking assembly grasped by the grasping device is placed on the loading station.

[0105] In this embodiment, the specific process of releasing the n stacked components grasped by the grasping device onto the conveying device 6 is as follows:

[0106] The n gripping units 1 of the gripping device are arranged in an ascending manner from front to back, and the n gripping units 1 are close to each other, so that the battery cell C of the stacked assembly of the latter gripping unit is located above the welding ribbon group B of the former gripping unit;

[0107] The first end of the conveyor belt is extended stepwise by the length of n placement units in a direction away from the second end, so as to form a loading station with the length of n placement units;

[0108] The gripping device places the gripped n stacked components on the loading station.

[0109] After a preset number of the stacking assemblies are placed on the conveyor belt, the conveyor belt is conveyed toward the second end.

[0110] In another embodiment, the first end of the conveyor belt may be arranged to step forward by the length of a placement unit each time in a direction away from the second end, and the grasping device may release a stacking component at the loading station formed by the stepping extension each time the first end of the conveyor belt steps forward by the length of a placement unit in a direction away from the second end, until the n stacking components grasped by the grasping device are all placed on the conveying device 6; after a preset number of the stacking components are placed on the conveyor belt, the conveyor belt is conveyed in the direction of the second end.

[0111] It should be noted here that the length of each placement unit in the present application is set to be able to place a stacking component.

[0112] Specifically, when the conveyor belt steps forward by the length of a placement unit each time, the gripping device releases a stacking assembly at the loading station each time, and when placing the stacking assembly, the portion of the released stacking assembly with stacked cells is placed on the rear section of the soldering ribbon group of the previous stacking assembly, and the rear section of the soldering ribbon group of the stacking assembly is placed at the loading station. Furthermore, if the stacking assembly placed is not the last stacking assembly in a battery string, the length of a placement unit stepped forward is the sum of the length of a cell and the spacing between cells after stacking; and when the stacking assembly placed is the last in a battery string, the length of a placement unit stepped forward is the length of a cell plus the distance of a string spacing;

[0113] When the conveyor belt steps forward by the length of n placement units each time, the gripping device can place n stacking components at the loading station of the length of n placement units. Specifically, when placing, the portion of the welding tape group of the first stacking component of the n stacking components stacked with battery cells is placed on the rear section of the welding tape group of the previous stacking component on the conveyor belt, and the rear section of the welding tape group of the last stacking component of the n stacking components is located at the outermost end of the loading station. Further, if the placed n stacking components do not include the last stacking component in a battery string, the distance of the n placement units is the length of n battery cells plus n inter-cell spacings. If the placed n stacking components include the last stacking component in a battery string, the distance of the n placement units is the length of n battery cells plus n-1 inter-cell spacings and a string spacing, because the length of the welding tape between adjacent battery strings is longer than the length of the welding tape in the middle of a battery string.

[0114] The length of the battery cell mentioned here refers to the length of the battery cell along the conveying direction of the conveyor belt.

[0115] In order to enable the conveyor belt of the conveyor device 6 to extend step by step, the conveyor device 6 can be specifically configured as follows: Fig.13 The structure shown in the figure, the conveying device 6 includes a conveyor belt 61, and also 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, wherein: 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 stepwise toward or away from the fixed platform 64 in the conveying direction of the conveyor belt 61 (the fixed platform 64 is close to the second end of the conveyor belt relative to the stepping platform 63);

[0116] The conveyor belt 61 is arranged on the fixed platform 64 and the stepping platform 63. When the stepping platform 63 moves away from the fixed platform 64, the conveyor belt 61 moves from bottom to top at the end of the stepping platform 63 away from the fixed platform 64, so that the upper surface of the conveyor belt 61 extends in a stepwise manner along the stepping platform 63 in a direction away from the fixed platform 64, that is, the conveyor belt 61 extends toward the first end;

[0117] The conveyor belt driving mechanism 35 driving the conveyor belt 61 includes a driving roller 651, a first guide roller 652, a second guide roller 653 and a tensioning roller 654;

[0118] The active roller 651 is arranged at the end of the fixed platform 64 away from the stepping platform 63, and is driven to rotate by the driving motor. The first guide roller 652 is located at the end of the stepping platform 63 away from the fixed platform 64, and the first guide roller 652 and the second guide roller 653 are installed on the stepping platform 63. The tensioning roller 654 is located below the first guide roller 652 and the second guide roller 653. The tensioning roller 654 is arranged to be able to move back and forth along the conveying direction of the conveyor belt 61 to thereby tension the conveyor belt 61. Specifically, a tensioning roller 654 can be arranged on the base 62 along the conveying direction of the conveyor belt 61. The tensioning roller 654 moves back and forth along the slide rail under the drive of the tensioning roller driving cylinder; the conveyor belt 61 is sequentially wound around the active roller 651, the first guide roller 652, the second guide roller 653 and the tensioning roller 654, wherein the second guide roller 653 is located on the transmission surface of the conveyor 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 with the stepping platform 63, and guide the conveyor belt 61 to move and extend upward from the bottom, so that the first end of the conveyor belt 61 forms a loading station.

[0119] It can be understood that in order to form an empty loading station at the first end of the conveying device, the conveying device 6 can also adopt other structural forms. For example, the conveying device 6 moves as a whole toward the first end, and then the conveyor belt runs toward the second end. The loading station can also be formed at the first end of the conveying device.

[0120] In the technical solution provided by the present invention, in order to improve the stacking production efficiency of the battery string, two sets of the battery string stacking equipment can be provided, such as Fig.14 In the embodiment shown, the two sets of battery string stacking equipment are arranged in parallel, and between the two sets of battery string stacking equipment, a battery cell conveying device 10 and a pressing tool conveying device 20 can be arranged, wherein the battery cell conveying device 10 provides battery cells C to the battery cell carrying device 4, and the pressing tool conveying device 20 provides the pressing tool A to the pressing tool carrying device 2. Fig.14In the illustrated embodiment, a cell conveying device 10 simultaneously provides cells to the cell string stacking devices on both sides, and a pressing tool conveying device 20 simultaneously provides pressing tools to the cell string stacking devices on both sides.

[0121] exist Fig.15 In the illustrated embodiment, two battery cell conveying devices 10 and two pressing tool conveying devices 20 are provided between the two sets of battery string stacking equipment. Each battery cell conveying device 10 provides battery cells to one set of battery string stacking equipment, and each pressing tool conveying device provides a pressing tool to one battery string stacking equipment.

[0122] According to another aspect of the present invention, a battery string stacking method is further provided, wherein the battery string stacking method uses a grabbing unit 1 as described above to grab a pressing tool A, a welding ribbon group B and a battery cell C, and the battery string stacking method comprises:

[0123] The i-th stacked assembly is conveyed onto the conveying device 6, wherein the stacked assembly includes sequentially stacked battery cells C, welding ribbon groups B and pressing tools A, where i is any natural number greater than 0;

[0124] Wherein, the step of conveying the i-th stacked component onto the conveying device comprises:

[0125] Controlling the grabbing unit 1 as described above to grab a pressing tool A;

[0126] Controlling the grabbing unit 1 to clamp a welding ribbon group B;

[0127] Controlling the grabbing unit 1 to grab a battery cell C;

[0128] Control the grabbing unit 1 to release the battery cell C, the welding ribbon group B and the pressing tool A onto the conveying device 6, wherein the front section of the welding 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 of the welding ribbon group;

[0129] Set i to i+1, continue the step of conveying the i-th stacking assembly to the conveying device 6, and stack the battery cell C of the i-th stacking assembly on the rear section of the welding ribbon group B of the i-1-th stacking assembly.

[0130] Preferably, at least two gripping units 1 are provided, and at least two gripping units 1 take turns to carry the stacking assembly to the conveying device 6 .

[0131] According to another aspect of the present invention, a battery string stacking method is further provided, the battery string stacking method comprising: using each grabbing unit 1 of the grabbing device as described above to grab a pressing tool A, a welding ribbon group B and a battery cell C respectively, and the pressing tool A, the welding ribbon group B and the battery cell C grabbed by each of the grabbing units 1 form a stacking assembly;

[0132] The n stacked assemblies grasped by the grasping device are released onto the conveying device 6, so that the battery cell C of the next stacked assembly is stacked on the rear section of the welding ribbon group B of the previous stacked assembly.

[0133] Wherein, each grabbing unit 1 using the grabbing device as described above grabs the pressing tool A, the welding ribbon group B and the battery cell C respectively, specifically including:

[0134] Control each grabbing unit 1 of the grabbing device to grab a pressing tool A respectively;

[0135] Controlling the solder strip clamping component 12 of the first gripping unit 1 of the gripping device to clamp a plurality of parallel solder strips;

[0136] Control the gripping device to pull the clamped solder strip to a preset position, and enable each gripping unit 1 to pick up a battery cell C;

[0137] The n grasping units 1 of the grasping device are controlled to move away from each other so that two adjacent grasping units are spaced at a preset distance, and the solder strip clamping components 12 of each grasping unit 1 clamp the solder strip respectively; the solder strip is cut corresponding to each grasping unit 1, so that each grasping unit 1 clamps a cut solder strip group.

[0138] Wherein, controlling the solder strip clamping component 12 of the first gripping unit 1 of the gripping device to clamp a plurality of parallel solder strips comprises: controlling the first gripping unit 1 to descend to the height where the solder strips are located; the solder strip clamping component 12 of the first gripping unit clamps the solder strips;

[0139] The method of controlling the grasping device to pull the clamped welding strip to a preset position and making each grasping unit 1 grasp a battery cell C comprises: the n grasping units 1 of the grasping device are moved to the preset position, and during the movement, the n grasping units 1 of the grasping device are controlled to rise and fall to the same height; the n grasping units 1 at the same height descend to grasp the battery cell C.

[0140] Wherein, the corresponding cutting of the welding strip by each of the grabbing units 1 specifically includes:

[0141] Grasp the solder strip by the solder strip gripper 5 at the position where the solder strip is cut corresponding to each grabbing unit;

[0142] The soldering strip is cut at a position close to the soldering strip gripper 5 .

[0143] The step of releasing the n stacked assemblies grasped by the grasping device onto the conveying device 6 so that the battery cell C of the next stacked assembly is stacked on the rear section of the welding ribbon group B of the previous stacked assembly comprises:

[0144] Controlling the i-th gripping unit 1 of the gripping device to release the gripped i-th stacking component onto the conveying device 6;

[0145] Control the i+1th grabbing unit to release the grabbed i+1th stacking assembly, so that the battery cell C of the i+1th stacking assembly is stacked on the rear section of the welding ribbon group B of the i-th stacking assembly;

[0146] The solder ribbon gripper 5 holding the solder ribbon group of the i-th stacked component releases the gripped solder ribbon group B;

[0147] After the nth stacking assembly grasped by the grasping device is released on the conveying device 6 , the battery string stacking method further comprises: clamping the welding ribbon group B of the nth stacking assembly released by the grasping device by the tail clamp 7 provided at the end of the conveying device 6 .

[0148] When the n stacked components grasped by the grasping device are released on the conveying device 6, the n grasping units of the grasping device are first controlled to rise and arrange from front to back, and the n grasping units 1 are close to each other, so that the battery cell C of the stacked component of the latter grasping unit is located above the welding strip group B of the former grasping unit; then, each grasping unit is controlled to release the grasped stacked components on the conveying device 6 at the same time, or the i-th grasping unit is first controlled to place the stacked components on the conveying device 6, and then the i+1-th grasping unit is lowered to place the grasped stacked components on the conveying device 6.

[0149] The specific process of stacking battery strings is described in detail below according to the specific implementation method (such as Figure 3-Figure 12 shown):

[0150] like Figure 3 As shown, 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 a clamping tool A from the clamping tool carrying device 2 respectively;

[0151] like Figure 4As shown, the gripping device is controlled to move to the welding strip providing device 3, the first gripping unit 1 of the gripping device is lowered to the height of the welding strip, and the welding strip clamping component 12 of the first gripping unit 1 clamps the welding strip; wherein, before the gripping unit 1 clamps the welding strip or when the gripping unit 1 clamps and pulls the welding strip to a preset position, the preset part of the welding strip is pressed into a flat or bent structure by the welding strip pressing device;

[0152] like Figure 5 As shown, the gripping device pulls the clamped welding ribbon and moves it to the battery cell carrying device 4. During the movement, the three gripping units 1 of the gripping device are lifted to the same height, and the three gripping units 1 at the same height are lowered to the battery cell carrying device 4 to grip the battery cell C;

[0153] like Figure 6 As shown, the cell carrier 4 is removed, and the three gripping units 1 of the gripping device are controlled to move away from each other so that two adjacent gripping units are spaced a preset distance apart, and the solder strip clamping components 12 of each gripping unit 1 clamp the solder strip respectively;

[0154] Control three solder strip grippers 5 to respectively correspond to a gripping unit 1 to grip the position of the solder strip to be cut, and then cut the solder strip, so that each gripping unit 1 respectively clamps an independent stacking assembly consisting of a clamping tool A, a solder strip group B obtained by cutting, and a battery cell C;

[0155] Then, the three gripping units 1 of the gripping device are controlled to be raised and arranged from front to back, and the three gripping units 1 are close to each other, so that the battery cell C of the stacked assembly of the latter gripping unit is located above the welding ribbon group B of the former gripping unit, as shown in FIG. Figure 7 The status shown;

[0156] The grabbing device is controlled to move to the conveying device 6, and the conveying belt of the conveying device 6 is stepped toward the grabbing device so that each stacked component grabbed by the grabbing device is released on the conveying device 6. The specific process is as follows:

[0157] like Figure 8 As shown, the three grabbing units of the grabbing device are arranged in an elevated manner from front to back, and after the three grabbing units 1 are close to each other, they move to the first end of the conveying device 6 (of course, the three grabbing units can also be close to each other and stacked after the grabbing device moves to the first end of the conveyor belt), wherein the stacked assembly grabbed by the grabbing device is located above the first end of the conveyor belt and is close to the vertical distance of the conveyor belt;

[0158] The conveyor belt of the conveyor device 6 steps forward by the length of a placement unit in a direction away from the second end (i.e., in a direction toward the grasping device), so that when the first stacking component grasped by the first grasping unit of the grasping device is partially located above the conveyor device 6, the second grasping unit and the third grasping unit begin to descend, and when the conveyor device 6 steps forward until the first stacking component is completely located on the conveyor device 6, the first stacking component is released; when the second grasping unit stacks the battery cell C of the second stacking component on the rear section of the welding ribbon group B of the first stacking component, as shown in FIG. Fig. 9 As shown, the soldering ribbon gripper 5 grasping the first stacked assembly releases the grasped soldering ribbon (the soldering ribbon gripper 5 can specifically release the soldering ribbon under the thrust of the conveyor belt stepping, or by other means such as manually removing the soldering ribbon gripper);

[0159] When the conveyor belt of the conveyor device 6 continues to step forward, so that the second stacked assembly is completely located on the conveyor device 6, and the third grabbing unit stacks the battery cell C of the grabbed third stacked assembly on the rear section of the welding ribbon group B of the second stacked assembly, as shown in FIG. Fig.10 As shown, the solder ribbon gripper 5 grasping the second stacked assembly releases the grasped solder ribbon;

[0160] When the conveyor belt continues to step forward so that the third stacking assembly is completely located on the conveying device 6, as shown in FIG. Fig.11 As shown, the tail clamp 7 located at the end of the conveying device 6 clamps the solder ribbon group B of the third stacked component, and the solder ribbon gripper 5 clamping the third stacked component releases the solder ribbon.

[0161] Then, the stacked components are released further to the conveying device 6 by a subsequent gripping device.

[0162] The above description is about the situation that the conveyor belt steps one placement unit length each time, and a loading station with a placement unit length is formed at the first end of the conveyor belt. In this case, the gripping device releases one stacking component each time. It is understandable that the conveyor belt can also be set to step n placement unit lengths each time, and the n stacking components grabbed by the gripping device can be released at the loading station at one time. The following description is still based on the situation that the gripping device has three gripping units as an example:

[0163] Specifically, the three grabbing units of the grabbing device are arranged in an elevated manner from front to back, and after the three grabbing units 1 are close to each other, they 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 at a relatively close vertical distance to the conveying belt;

[0164] The conveyor belt of the conveying device 6 steps in a direction away from the second end (i.e., in a direction toward the grasping device) by the length of three battery cells. During the stepping of the conveyor belt, the soldering ribbon gripper 5 on the grasping device for grasping the soldering ribbon is pushed. The three soldering ribbon grippers 5 release the soldering ribbon under the action of the thrust. The loading station with the length of three battery cells on the conveyor belt moves to the bottom of the n stacked assemblies. The grasping device releases the three stacked assemblies at the loading station (refer to Fig.11 The state shown in the figure), wherein the end of the welding strip of the last stacked assembly is clamped and positioned by the tail clamp 7 provided at the end of the conveying device 6.

[0165] Then, the stacked components are released further to the conveying device 6 by a subsequent gripping device.

[0166] After a preset number of stacking components are placed on the conveying device 6, the conveying device conveys the carried stacking components toward the second end.

[0167] The above description is that the conveyor belt of the conveyor device 6 steps in the direction of the gripping device so that each stacked component grabbed by the gripping device is released on the conveyor device 6 in sequence. It can be understood that each stacked component can also be released by the conveyor belt of the conveyor device 6 stepping in the direction away from the gripping device. In this method, the process of releasing each stacked component by the gripping device is as follows;

[0168] The first gripping unit of the gripping device releases the first stacking assembly at the end of the conveying device 6;

[0169] During the process of the first grabbing unit releasing the first stacked component, the second grabbing unit and the third grabbing unit descend, and then the second grabbing unit stacks the battery cells of the second stacked component on the rear section of the soldering ribbon group of the first stacked component, and the conveying device 6 steps forward to enable the second stacked component to be completely moved onto the conveying device 6. During this process, the soldering ribbon gripper 5 grabbing the first stacked component releases the grabbed soldering ribbon, and the soldering ribbon gripper 5 can be separated from the soldering ribbon when the stacked component is carried by the conveying belt and moves in a direction away from the gripping device;

[0170] When the conveyor belt steps forward until the second stacked assembly is completely placed on the conveyor device 6, the third grabbing unit stacks the battery cell C of the third stacked assembly on the rear section of the solder ribbon group of the second stacked assembly. During this process, the solder ribbon gripper 5 grabbing the second stacked assembly releases the grabbed solder ribbon.

[0171] The conveyor belt of the conveyor device 6 moves forward again, and the third stacked component is completely moved onto the conveyor device 6. At this time, the rear section of the solder tape group B of the third stacked component is clamped by the tail clamp 7 set at the end of the conveyor device 6, and the solder tape gripper 5 clamping the third stacked component releases the clamped solder tape.

[0172] In order to improve the stacking efficiency of the battery strings, the battery string stacking equipment may be provided with at least two grasping devices, and the at least two grasping devices alternately grasp the stacking components and release them onto the conveying device.

[0173] In addition, if Fig.12 As shown, the conveying device 6 conveys the stacked components to the bottom of the hot pressing device 8, and the hot pressing device 8 performs hot pressing on the stacked components, so that the stacked battery cells and welding ribbon groups are fixed together.

[0174] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A gripping unit, characterized in that: The grabbing unit comprises a clamping tool grabbing component for grabbing a clamping tool, a cell grabbing component for grabbing a cell, and a soldering strip clamping component for clamping a soldering strip group, wherein the soldering strip group comprises a plurality of parallel soldering strips; Wherein, the grasping unit is configured such that after the clamping tool grasping component grasps the clamping tool, the solder ribbon clamping component clamps a head end of the solder ribbon group at one end of the clamping tool, and the battery cell grasping component grasps the battery cell located below the solder ribbon group; wherein the front section of the solder ribbon group close to the head end is located between the clamping tool and the battery cell, and the rear section of the solder ribbon group extends beyond the battery cell; after the grasping unit releases the clamping tool, the solder ribbon group and the battery cell, the front section of the solder ribbon group is stacked on the battery cell, and the clamping tool is stacked on the front section of the solder ribbon to position the solder ribbon group.

2. The gripping unit according to claim 1, characterized in that: The clamping tool grabbing component is configured to be able to absorb the clamping tool; And / or, the battery cell grasping component is configured to be able to absorb the battery cell.

3. The gripping unit according to claim 1, characterized in that: The clamping tool grabbing component includes an electromagnet for adsorbing the clamping tool; And / or, the battery cell grasping component includes a plurality of suction cups for adsorbing the battery cell.

4. A gripping device, characterized in that: The gripping device comprises n gripping units according to any one of claims 1 to 3, wherein the n gripping units are arranged in a straight line and are configured to be able to move away from and approach each other along the straight line; wherein the i+1th gripping unit is located at an end of the i-th gripping unit away from the welding strip clamping component of the i-th gripping unit, wherein n is any natural number greater than 1, and i is any natural number from 1 to n-1.

5. The gripping device according to claim 4, characterized in that: The gripping device further comprises a cutting mechanism disposed near the (i+1)th gripping unit and used for cutting the welding strip clamped by the (i)th gripping unit.

6. The gripping device according to claim 4 or 5, characterized in that: The n grabbing units are configured to be arranged in sequence from high to low.

7. A battery string stacking device, characterized in that: The battery string stacking device comprises: a pressing tool bearing device, a battery cell bearing device, a welding strip providing device, a conveying device and a grasping device according to claim 4; the pressing tool bearing device is configured to carry n pressing tools; the battery cell bearing device is configured to carry n battery cells, and the welding strip providing device is configured to provide multiple parallel welding strips; Wherein, after each grabbing unit of the grabbing device grabs a pressing tool from the pressing tool carrying device, the solder strip clamping component of the first grabbing unit of the grabbing device grabs a plurality of solder strips from the solder strip providing device, and pulls the clamped solder strips to move above the battery cell carrying device, and each of the grabbing units grabs a battery cell from the battery cell carrying device; After the n grasping units of the grasping device grasp the battery cells, they move away from each other so that two adjacent grasping units are spaced by a preset distance, and after the solder strip clamping components of each grasping unit clamp the solder strips respectively, each grasping unit cuts the solder strips accordingly, so that each grasping unit grasps a stacked assembly formed by stacking the battery cells, a plurality of cut solder strips and a pressing tool; The stacked assemblies grasped by the n grasping units of the grasping device are released onto the conveying device, wherein the battery cells of a subsequent stacked assembly are stacked on the rear section of the welding ribbon group of a previous stacked assembly.

8. The battery string stacking device according to claim 7, characterized in that: The battery string stacking equipment also includes a solder strip gripper arranged corresponding to each gripping unit of the gripping device, and the solder strip gripper is arranged to grip the solder strip at the cutting position when cutting the solder strip, and when the gripping device moves the gripped stacking assembly to the conveying device, the solder strip gripper clamps the solder strip.

9. The battery string stacking device according to claim 8, characterized in that: Each of the welding strip grippers is provided with a welding strip cutting component for cutting the welding strip.

10. The battery string stacking device according to claim 7, characterized in that: The solder strip providing device includes 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 device according to claim 7, characterized in that: The battery string stacking device further comprises a solder strip cutting component disposed near the i+1th grabbing unit, and the solder strip clamped by the i-th grabbing unit is cut by the solder strip cutting component near the i+1th grabbing unit; The battery string stacking device further includes a cutting mechanism, and the welding strip grasped by the nth grasping unit is cut by the cutting mechanism.

12. The battery string stacking device according to any one of claims 7 to 11, characterized in that: A tail clamp is provided at one end of the conveying device. After the nth grasping unit of the grasping device releases the stacking assembly held on the conveying device, the tail end of the welding ribbon of the stacking assembly is clamped and positioned by the tail clamp.

13. The battery string stacking device according to any one of claims 7 to 11, characterized in that: The battery string stacking equipment is provided with at least two grasping devices, and the at least two grasping devices alternately release the grasped stacking components onto the conveying device.

14. A battery string stacking method, characterized in that: The battery string stacking method comprises: Carrying the i-th stacked assembly onto the conveying device, the stacked assembly comprising sequentially stacked battery cells, welding ribbon groups and pressing fixtures, where i is any natural number greater than 0; Wherein, the step of conveying the i-th stacked component onto the conveying device comprises: Controlling the grabbing unit described in any one of claims 1 to 3 to grab a pressing tool; Controlling the grabbing unit to clamp a welding ribbon group; Controlling the grabbing unit to grab a battery cell; Controlling the grabbing unit to release the battery cell, the welding ribbon group and the pressing tool onto the conveying device, wherein the front section of the welding ribbon group released by the grabbing unit is stacked on the battery cell, and the pressing tool is stacked on the front section of the welding ribbon group; Set i to i+1, continue to execute the step of conveying the i-th stacking assembly to the conveying device, and stack the battery cells of the i-th stacking assembly on the rear section of the welding ribbon group of the i-1-th stacking assembly.

15. The battery string stacking method according to claim 14, characterized in that: At least two of the grabbing units are provided, and the at least two grabbing units take turns to carry the stacking assembly onto the conveying device.

16. A battery string stacking method, characterized in that: The battery string stacking method comprises: using each grabbing unit of the grabbing device according to any one of claims 4 to 6 to grab a pressing tool, a welding ribbon group and a battery cell respectively, and the pressing tool, the welding ribbon group and the battery cell grabbed by each of the grabbing units form a stacking assembly; The n stacked assemblies grasped by the grasping device are released onto the conveying device, so that the battery cells of the latter stacked assembly are stacked on the rear section of the welding ribbon group of the former stacked assembly.

17. The battery string stacking method according to claim 16, characterized in that: Each gripping unit of the gripping device according to any one of claims 4 to 6 grips the pressing tool, the welding ribbon group and the battery cell respectively, comprising: Control each grabbing unit of the grabbing device to grab a pressing tool respectively; Controlling the solder strip clamping component of the first gripping unit of the gripping device to clamp a plurality of parallel solder strips; Controlling the gripping device to pull the clamped solder strip to a preset position, and allowing each of the gripping units to pick up a battery cell; Controlling the n grabbing units of the grabbing device to move away from each other so that two adjacent grabbing units are spaced apart by a preset distance, and the solder strip clamping components of each grabbing unit clamp the solder strip respectively; The welding strips are cut corresponding to each of the grabbing units, so that each grabbing unit clamps a welding strip group formed by cutting.

18. The battery string stacking method according to claim 17, characterized in that: Controlling the solder strip clamping component of the first gripping unit of the gripping device to clamp a plurality of parallel solder strips comprises: Control the first grabbing unit to descend to the height where the soldering strip is located; the soldering strip clamping component of the first grabbing unit clamps the soldering strip; The controlling the grasping device to pull the clamped welding strip to a preset position and making each grasping unit grasp a battery sheet includes: The n grabbing units of the grabbing device move to the preset position, and during the movement, the n grabbing units of the grabbing device are controlled to rise and fall to the same height; The n grabbing units at the same height descend to grab the battery sheet.

19. The battery string stacking method according to claim 17, characterized in that: The corresponding each of the grabbing units cuts the welding strip, including: Grab the soldering tape by using the soldering tape gripper at the position where each grabbing unit cuts the soldering tape; The soldering ribbon is cut at a position close to the soldering ribbon gripper.

20. The battery string stacking method according to claim 19, characterized in that: The step of releasing the n stacked assemblies grasped by the grasping device onto a conveying device so that the battery sheet of a subsequent stacked assembly is stacked on the rear section of the welding ribbon group of a previous stacked assembly comprises: Controlling the i-th grabbing unit of the grabbing device to release the grabbed i-th stacking component onto the conveying device; Controlling the i+1th grabbing unit to release the grabbed i+1th stacking assembly, so that the battery cell of the i+1th stacking assembly is stacked on the rear section of the welding ribbon group of the ith stacking assembly; The solder ribbon gripper holding the solder ribbon group of the i-th stacked component releases the gripped solder ribbon group; After the nth stacking assembly grasped by the grasping device is released on the conveying device, the battery string stacking method further comprises: clamping the welding ribbon group of the nth stacking assembly released by the grasping device by a tail clamp arranged at the end of the conveying device.

21. The battery string stacking method according to any one of claims 16 to 19, characterized in that: The step of releasing the n stacked components grasped by the grasping device onto a conveying device comprises: Controlling the n grabbing units of the grabbing device to be raised and arranged from front to back, and the n grabbing units are close to each other, so that the battery sheet of the stacked assembly of the latter grabbing unit is located above the welding ribbon group of the former grabbing unit; Control the first end of the conveyor belt of the conveying device to extend step by step in a direction away from the second end by the length of a placement unit each time, so as to form a loading station with a length of a placement unit at the first end; The first end of the conveyor belt extends in a direction away from the second end by the length of a placement unit each time, and the gripping device is controlled to release a stacking component on the loading station until n stacking components are released on the conveying device.

22. The battery string stacking method according to any one of claims 16 to 19, characterized in that: The step of releasing the n stacked components grasped by the grasping device onto a conveying device comprises: Controlling the n grabbing units of the grabbing device to be raised and arranged from front to back, and the n grabbing units are close to each other, so that the battery sheet of the stacked assembly of the latter grabbing unit is located above the welding ribbon group of the former grabbing unit; Controlling the first end of the conveyor belt of the conveying device to extend stepwise in a direction away from the second end by the length of n placement units, so as to form an empty loading station at the first end; The grabbing device places the grabbed n stacking components into the loading station.

Images