Battery cell string welding equipment and battery cell string welding method

Abstract

This invention discloses a battery cell stringing system and method. The battery cell stringing system includes: a welding conveying device for conveying battery cells and welding strips; a welding strip traction device for pulling and laying the welding strip onto the welding conveying device; and a welding strip pressing device, including a main body, which includes a mounting frame, a welding strip pressing fixture, and a fixture gripping component. The fixture gripping component is mounted on the mounting frame and is configured to grip the welding strip pressing fixture and release it onto the welding strip. The main body also includes a pre-pressing component, which is configured to pre-press the welding strip onto the welding strip before releasing the welding strip pressing fixture. During the process of the welding strip pressing fixture moving downwards and pressing onto the welding strip, the downward extension height of the pre-pressing component gradually decreases relative to the mounting frame. The technical solution provided by this invention can improve the positioning effect and laying efficiency of the welding strip on the welding conveying device, thereby improving the production efficiency of battery strings.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic cell production, and in particular relates to a cell string welding device and a cell string welding 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] During the battery cell string welding process, the welding ribbon needs to be laid on the welding conveyor belt first, and then the battery cells are stacked on the welding ribbon. During the stacking process, in order to prevent the welding ribbon from shifting on the welding conveyor belt, the handling tool needs to press on the welding ribbon to position the welding ribbon on the conveyor belt, and then the battery cells can be stacked.

[0004] At present, the tooling used for pressing the welding strip is usually composed of a single row of pressing pins, which has a poor effect on the positioning of the welding strip. Moreover, when pressing the welding strip, only a part of the welding strip can be pressed. When welding, it is necessary to set up welding pressing pins to press and weld, which is inefficient. If the row of pressing pins is set too wide, the pressing pins will interfere with the traction of the welding strip, or bend the welding strip clamped by the traction of the welding strip, which is not conducive to production. Summary of the invention

[0005] In view of this, the present invention aims to propose a battery cell string welding device and a battery cell string welding method to solve the problem that the positioning effect of the welding strip by the pressing welding strip tooling in the prior art is poor, and the method of positioning the welding strip by using the pressing welding strip tooling and the welding pressure needle is inefficient.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] The present invention provides a battery cell string welding system, the battery cell string welding system comprising:

[0008] A welding conveying device, wherein the welding conveying device is used to convey battery cells and welding strips;

[0009] A welding tape traction device, wherein the welding tape traction device is configured to be able to traction the welding tape and lay the welding tape onto the welding conveying device;

[0010] A pressure welding strip device, the pressure welding strip device includes a main body mechanism, the main body mechanism includes a mounting frame, a pressure welding strip tool and a tool grabbing component, the tool grabbing component is installed on the mounting frame, and the tool grabbing component is configured to be able to grab the pressure welding strip tool and release the pressure welding strip tool on the welding strip to compress the welding strip; the main body mechanism also includes a pre-pressing component that can be telescopic relative to the mounting frame, the pre-pressing component is configured to pre-press the welding strip before the tool grabbing component releases the pressure welding strip tool, and in the process of the pressure welding strip tool moving down to press on the welding strip, the height of the pre-pressing component extending downward is gradually reduced relative to the mounting frame.

[0011] Preferably, the pre-pressing component is slidably mounted on the mounting frame, and the pre-pressing component can slide down from the mounting frame and be pressed on the welding strip by gravity;

[0012] Alternatively, an elastic component for applying elasticity to the pre-pressing component is provided between the pre-pressing component and the mounting frame, and the elastic component can press the pre-pressing component against the welding strip through elasticity;

[0013] Alternatively, the pre-pressing component is an elastic component installed on the mounting frame, and the elastic component is pressed on the welding strip by elasticity.

[0014] Preferably, the pre-pressing component comprises a plurality of pre-pressing needles mounted on the mounting frame, and an elastic component is arranged between each of the pre-pressing needles and the mounting frame.

[0015] Preferably, the press-welding strip tool comprises a tool frame and a pressing part mounted on the tool frame for pressing the welding strip;

[0016] The pre-pressing component is installed on the tooling frame, an elastic component is arranged between the pre-pressing component and the tooling frame, or the pre-pressing component is an elastic component installed on the tooling frame.

[0017] Preferably, the clamping part includes a plurality of pressing pins arranged on the tooling frame, the pre-pressing part includes a plurality of pre-pressing pins arranged on the tooling frame, elastic parts are arranged between the pressing pins and the pre-pressing pins and the tooling frame, and the top surface of the pre-pressing pins is higher than the top surface of the pressing pins.

[0018] Preferably, the main body mechanism further comprises a cell adsorption component mounted on the mounting frame, wherein the cell adsorption component is configured to be able to adsorb cell sheets and stack the adsorbed cell sheets on the welding strip after the pre-pressing component is pre-pressed on the welding strip;

[0019] Among them, the installation positions of the tooling grabbing component and the battery cell adsorption component on the mounting frame are set so that when the pressure welding strip tooling grabbed by the tooling grabbing component is pressed on the first welding strip segment of the welding strip, the battery cell adsorbed by the battery cell adsorption component is pressed on the second welding strip segment of the welding strip.

[0020] Preferably, the pre-pressing component is mounted on the mounting frame, and the pre-pressing component is arranged between the tooling grabbing component and the battery cell adsorption component;

[0021] The mutual distances among the tool grabbing component, the pre-pressing component and the battery cell adsorption component are adjustable.

[0022] Preferably, the tooling grabbing component comprises at least one electromagnet capable of magnetically adsorbing the pressure welding strip tooling, wherein the electromagnet can adsorb the tooling when powered on and release the tooling when powered off.

[0023] Preferably, the pressure welding belt device further comprises a rotatable mechanical arm and a lifting mechanism installed on the mechanical arm, and the main body mechanism is installed at a driving end of the lifting mechanism to be driven to rise and fall by the lifting mechanism.

[0024] According to another aspect of the present invention, a battery cell string welding method is further provided, characterized in that the battery cell string welding method comprises:

[0025] S1, clamping one end of a welding ribbon of a preset length, and pulling and laying the welding ribbon on a welding conveying device;

[0026] S2, using a pre-pressing component to pre-press the unclamped welding strip section of the welding strip onto the welding conveying device, and releasing the clamped end of the welding strip;

[0027] S3, pressing the welding tape pressing tool onto the first welding tape segment of the welding tape;

[0028] S4, stacking the battery cell on the second welding strip segment of the welding strip;

[0029] Steps S1, S2, S3 and S4 are performed cyclically to form a battery string in which the welding strips and battery cells are stacked in sequence.

[0030] The technical solution provided by the present invention can improve the positioning effect of the welding strip on the welding conveying device and the laying efficiency of the welding strip, thereby greatly improving the production efficiency of the battery string. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute improper limitations on the present invention.

[0032] In the attached picture:

[0033] Figure 1 A schematic diagram of the structure of a battery cell string welding device according to one embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the structure of a main body mechanism according to an embodiment of the present invention;

[0035] Figure 3 for Figure 2 The structural diagram of the main mechanism shown is viewed from another angle;

[0036] Figure 4 It is a schematic diagram of the structure in which a pre-pressing needle is installed on the press welding strip tooling.

[0037] Description of reference numerals:

[0038] 1-welding conveying device; 2-pressure welding belt device; 21-main body; 211-mounting frame; 2111-pressure needle mounting strip; 2112-suction cup mounting block; 212-electromagnet; 213-pre-pressure needle; 214-suction cup; 215-connecting part; 22-mechanical arm; 23-lifting mechanism; 3-pressure welding belt tooling; 31-tooling frame; 32-pressure needle; 4-battery cell. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] The present invention provides a battery cell string welding system, the battery cell string welding system comprising:

[0043] A welding conveying device 1, wherein the welding conveying device 1 is used to convey battery cells and welding strips;

[0044] A welding tape traction device, wherein the welding tape traction device is configured to be able to traction the welding tape and lay the welding tape onto the welding conveying device 1;

[0045] A pressure welding tape device 1, the pressure welding tape device 1 includes a main body mechanism 21, the main body mechanism 21 includes a mounting frame 211, a pressure welding tape tool and a tool grabbing component, the tool grabbing component is installed on the mounting frame 211, and the tool grabbing component is configured to be able to grab the pressure welding tape tool and release the pressure welding tape tool on the welding tape to compress the welding tape; the main body mechanism 21 also includes a pre-compression component that can be retracted relative to the mounting frame 211, the pre-compression component is configured to pre-press the welding tape before the tool grabbing component releases the pressure welding tape tool, and in the process of the pressure welding tape tool moving down to press on the welding tape, the height of the pre-compression component extending downward is gradually reduced relative to the mounting frame.

[0046] When laying the welding tape on the welding conveyor device 1, the welding tape traction device clamps one end of the welding tape of a preset length and pulls the welding tape to the preset position of the welding conveyor device 1. The pre-pressing component of the welding tape pressing device 1 can pre-press the unclamped welding tape segment of the welding tape on the welding conveyor device 1, and then the welding tape traction device releases the clamped end of the welding tape. After the welding tape is laid on the welding conveyor device as a whole, the tooling grabbing component releases the welding tape pressing tooling on the welding tape to achieve the pressing and positioning of the welding tape.

[0047] In the process of gradually lowering and laying the welding ribbon, the battery cell string welding system uses a pre-compression component to pre-compress the welding ribbon, which can effectively prevent the welding ribbon from deviating due to free falling due to loss of restraint when laying the welding ribbon. Therefore, the welding ribbon pressing device has a good effect in positioning the welding ribbon, which can effectively improve the laying efficiency of the welding ribbon, and thus help improve the production speed and production quality of the battery string.

[0048] In a preferred embodiment of the present invention, the structure of the pressure welding belt device 1 is as follows Figure 1 As shown, it includes a rotatable mechanical arm 22 and a lifting mechanism 23 installed on the mechanical arm 22, and the main body mechanism 21 is installed at the driving end of the lifting mechanism 23. In this way, the mechanical arm 22 can drive the installation body 21 to rotate between a grabbing position capable of grabbing the pressure welding belt tooling and a pressure welding belt position for releasing the pressure welding belt tooling, and the lifting mechanism 23 drives the lifting.

[0049] In this embodiment, the structure of the installation body 21 is as follows: Figure 2 and Figure 3 As shown, the installation body 21 includes a mounting frame 211, and a tooling grabbing component and a pre-pressing component are arranged on the mounting frame 211. A connecting portion 216 can be arranged on the mounting frame 211, so as to be installed on the lifting mechanism 23 of the mechanical arm 22 through the connecting portion 216.

[0050] Preferably, the tooling grabbing component includes at least one electromagnet 212 capable of magnetically adsorbing the pressure welding strip tooling, wherein the electromagnet 212 can adsorb the pressure welding strip tooling when powered on and release the pressure welding strip tooling when powered off.

[0051] More preferably, electromagnets 212 are respectively arranged on opposite sides of the mounting frame 211, and the two electromagnets 212 can be adsorbed from two sides of the welding strip tooling, wherein the connection direction of the two electromagnets 212 is substantially consistent with the width direction of the welding strip to be pressed.

[0052] It should be understood that the tooling grasping component capable of grasping the pressure welding strip tooling is not limited to being configured as an electromagnet 212 capable of adsorbing the tooling, and may also be configured in a manner capable of clamping the tooling using a clamping claw, for example.

[0053] In this embodiment, the pre-pressing component includes a plurality of pre-pressing needles 213 installed on the mounting frame 211, and an elastic component is arranged between each of the pre-pressing needles 213 and the mounting frame 211, so that the pre-pressing needle 213 can be extended and retracted relative to the mounting frame 211. In this way, when the mounting frame 211 gradually descends to release the welding strip pressing tooling, the distance between the mounting frame 211 and the welding strip to be pressed is reduced, so that the plurality of pre-pressing needles 213 can be retracted relative to the mounting frame 211 while being pressed on the welding strip.

[0054] Specifically, a long strip-shaped mounting bar 2111 is provided on the mounting frame 211, and a plurality of pre-pressing pins 213 are installed in the opening of the mounting bar 2111, and a spring for applying elastic force to the pre-pressing pins 213 can be provided in the opening. The plurality of pre-pressing pins 213 are arranged at intervals, and the spacing between adjacent pre-pressing pins 213 can be set equal to the spacing between the plurality of solder strips to be pressed, so that each pre-pressing pin 213 can be pressed on one solder strip.

[0055] It should be understood that the pre-pressing component is not limited to being provided in the form of a plurality of pre-pressing needles 213, and may also be provided in other forms that can be pressed on the solder strip. For example, the pre-pressing component may also be provided as an integral structure that can be pressed on a plurality of parallel solder strips, such as a long strip, and an elastic component is provided between the long strip and the mounting frame 211, so that the long strip can be extended and retracted relative to the mounting frame 211.

[0056] In addition, it can also be understood that, in order to allow the pre-pressing component to be able to expand and contract relative to the mounting frame 211, in addition to providing an elastic component between the pre-pressing component and the mounting frame 211 so that the elastic component presses the pre-pressing component against the welding strip by elastic force, the pre-pressing component can also be slidably mounted on the mounting frame 211, and the pre-pressing component can slide down from the mounting frame 211 and press on the welding strip by gravity. For example, an opening can be provided on the mounting frame 211, and the pre-pressing component is located in the opening and can slide along the opening. When the mounting frame 211 is located above the welding strip to be pressed, the pre-pressing component can slide down by gravity and press on the welding strip;

[0057] In addition, the pre-pressing component itself may be an elastic component installed on the mounting frame 211, and the elastic component is pressed on the welding strip by elasticity.

[0058] In this embodiment, the pressure welding tape device is further provided with a battery cell adsorption component, and the battery cell adsorption component is configured to adsorb the battery cell 4 and stack the battery cell 4 on the welding tape.

[0059] Specifically, Figure 2 and Figure 3 As shown, the battery cell adsorption component is a plurality of suction cups 214 mounted on a mounting frame 211. To make the suction cup 214 have a stronger adsorption force, an adsorption hole can be set at the center position of the suction cup 214. A suction pipeline connected to the adsorption hole can be set in the mounting block 12 of the mounting frame 211 on which the suction cup 214 is mounted. By sucking the gas from the adsorption hole, the suction cup 214 can have a stronger adsorption force to adsorb the battery cell 4.

[0060] When laying the solder strips and cells, refer to Figure 1After the pre-pressing component pre-presses the end of the welding ribbon that is not clamped by the welding ribbon traction device, the welding ribbon traction device releases the clamped end of the welding ribbon, so that the welding ribbon is laid as a whole at the predetermined position of the welding conveyor 1, and then the tooling grabbing component releases the welding ribbon tooling 3 on the first welding ribbon segment of the welding ribbon, and the battery cell adsorption component releases the battery cell 4 on the second welding ribbon segment of the welding ribbon. Among them, the welding ribbon tooling 3 and the battery cell 4 can be released at the same time, or one of the battery cell 4 and the welding ribbon tooling 3 can be released first, and then the other one is placed.

[0061] In this embodiment, preferably, the pre-pressing component is arranged between the tooling grabbing component and the cell adsorbing component. In this way, the pre-pressing component is pressed on the middle part of the welding strip of a preset length, the welding strip pressing tool is pressed on the first welding strip segment on one side of the pre-pressing part, and the cell is pressed on the second welding strip segment on the other side of the pre-pressing part.

[0062] Preferably, the mutual distances between the tooling grabbing component, the pre-pressing component and the cell adsorption component are adjustable, so that the relative positions of the welding strip tooling, the pre-pressing component and the cell on the welding strip to be pressed can be adjusted.

[0063] Specifically, a slide rail may be provided on the mounting frame 211, and the tooling grabbing component, the pre-pressing component, and the cell adsorption component may move along the slide rail and be locked when moved to a preset position. The tooling grabbing component, the pre-pressing component, and the cell adsorption component may be locked by a fastener such as a jack screw or may be clamped by a clamping component.

[0064] The present invention also provides another embodiment, which is different from the above embodiment in that the pre-pressing component is not arranged on the mounting frame 211, but is arranged on the pressure welding belt tooling.

[0065] like Figure 4 The welding strip pressing tool 3 shown in the figure comprises a tool frame 31 and a pressing part mounted on the tool frame 31 for pressing the welding strip;

[0066] The pre-pressing component is mounted on the tooling frame 31, and an elastic component is arranged between the pre-pressing component and the tooling frame 31, or the pre-pressing component is an elastic component mounted on the tooling frame 31. In this way, the pre-pressing component can be retracted relative to the tooling frame 31 during the process of pre-pressing the welding strip and gradually pressing the pressing component downward on the welding strip.

[0067] Specifically, the clamping part of the welding strip tool 3 for clamping the welding strip includes a plurality of clamping pins 32 arranged on the tool frame 31, and the pre-clamping part includes a plurality of pre-clamping pins 213 arranged on the tool frame 31. Elastic parts are arranged between the clamping pins 32 and the pre-clamping pins 213 and the tool frame 31, and the top surface of the pre-clamping pins 213 is higher than the top surface of the clamping pins 32. In this way, when the tool grabbing part of the mounting frame 211 grabs the welding strip tool 3 and the mounting frame 211 descends to a preset position, the pre-clamping pins 213 arranged on the welding strip tool 3 can pre-contact the welding strip and press on the welding strip, and then when the welding strip tool 3 gradually descends until the clamping pins 32 press on the welding strip, the pre-clamping pins 213 shrink relative to the tool frame 31 while clamping the welding strip.

[0068] Furthermore, the multiple pressing pins 32 on the pressing welding strip tooling 3 in this embodiment can be arranged in multiple rows, and the multiple rows correspond to a group of welding strips to be pressed, that is, the spacing between two adjacent rows of pressing pins 32 can be arranged to be equal to the spacing between the welding strips to be pressed, so that each row of pressing pins 32 can be pressed on a welding strip. Among them, each row of pressing pins 32 is correspondingly provided with at least one pre-pressing pin 213, so that each welding strip has a pre-pressing pin 213 for pre-pressing. Preferably, the pre-pressing pins 213 corresponding to the multiple rows of pressing pins 32 are arranged in a row, and the multiple rows of pressing pins 32 form multiple rows (the pressing pins 32 in each row are arranged at intervals along the length direction of the welding strip, and the pressing pins 32 in each row are arranged along the width direction of the welding strip).

[0069] The tool frame 31 of the pressure welding strip tool 3 includes a mounting body for mounting the pressure pin 32 and the pre-pressure pin 213 and gripping parts located on both sides of the mounting body, and the tool gripping parts on the mounting frame 211 (the tool gripping parts can be set as electromagnets 212) can be respectively adsorbed on the gripping parts on both sides. Preferably, the mounting body can be set as a hollow mesh structure to reduce the weight of the tool frame 31.

[0070] It should be understood that, in the present embodiment, the clamping portion installed on the tooling frame 31 is not limited to being in the form of a plurality of pressing pins 32, and the pre-pressing component is not limited to being in the form of a plurality of pre-pressing pins 213. For example, both the clamping portion and the pre-pressing component may be an integral block structure that can be pressed onto a plurality of welding strips.

[0071] According to another aspect of the present invention, a battery cell string welding method is also provided, the battery cell string welding method comprising:

[0072] S1, clamping one end of a welding ribbon of a preset length, and pulling and laying the welding ribbon on a welding conveying device;

[0073] S2, using a pre-pressing component to pre-press the unclamped welding strip section of the welding strip onto the welding conveying device, and releasing the clamped end of the welding strip;

[0074] S3, pressing the welding tape pressing tool onto the first welding tape segment of the welding tape;

[0075] S4, stacking the battery cell on the second welding strip segment of the welding strip;

[0076] Steps S1, S2, S3 and S4 are performed cyclically to form a battery string in which the welding strips and battery cells are stacked in sequence.

[0077] The welding conveyor device can convey the stacked welding ribbons and battery cells to the welding station, where they are fixed by welding.

[0078] The battery cell string welding method provided by the present invention has a good positioning effect of the welding strip on the welding conveying device, which can improve the laying efficiency of the welding strip, thereby improving the production efficiency of the battery string.

[0079] Those skilled in the art should understand that the specific structures and processes shown in the above specific embodiments are only exemplary and not restrictive. Moreover, those skilled in the art can combine the various technical features shown above in various possible ways to form new technical solutions, or make other changes, which are all within the scope of the present invention.

Claims

1. A battery cell string welding system, characterized in that: The battery cell string welding system comprises: A welding conveying device, wherein the welding conveying device is used to convey battery cells and welding strips; A welding tape traction device, wherein the welding tape traction device is configured to be able to traction the welding tape and lay the welding tape onto the welding conveying device; A pressure welding strip device, the pressure welding strip device comprises a main body mechanism, the main body mechanism comprises a mounting frame, a pressure welding strip tool and a tool grabbing component, the tool grabbing component is mounted on the mounting frame, and the tool grabbing component is configured to grab the pressure welding strip tool and release the pressure welding strip tool on the welding strip to compress the welding strip; the main body mechanism also comprises a pre-compression component that can be telescopic relative to the mounting frame, the pre-compression component is configured to pre-press the welding strip before the tool grabbing component releases the pressure welding strip tool, and in the process of the pressure welding strip tool moving down to press on the welding strip, the height of the pre-compression component extending downward is gradually reduced relative to the mounting frame; The press-welding strip tool comprises a tool frame and a pressing part installed on the tool frame for pressing the welding strip; The pre-pressing component is slidably mounted on the mounting frame; the pre-pressing component can slide down from the mounting frame and be pressed on the welding strip by gravity; Alternatively, an elastic component for applying elasticity to the pre-pressing component is provided between the pre-pressing component and the mounting frame, and the elastic component can press the pre-pressing component against the welding strip through elasticity; Alternatively, the pre-pressing component is an elastic component installed on the mounting frame, and the elastic component is pressed on the welding strip by elasticity.

2. The battery cell string welding system according to claim 1, characterized in that: The pre-pressing component comprises a plurality of pre-pressing needles mounted on the mounting frame, and an elastic component is arranged between each of the pre-pressing needles and the mounting frame.

3. The battery cell string welding system according to claim 1, characterized in that: The main body mechanism further comprises a battery cell adsorption component mounted on the mounting frame, wherein the battery cell adsorption component is configured to be able to adsorb battery cells and stack the adsorbed battery cells on the welding strip after the pre-pressing component is pre-pressed on the welding strip; Among them, the installation positions of the tooling grabbing component and the battery cell adsorption component on the mounting frame are set so that when the pressure welding strip tooling grabbed by the tooling grabbing component is pressed on the first welding strip segment of the welding strip, the battery cell adsorbed by the battery cell adsorption component is pressed on the second welding strip segment of the welding strip.

4. The battery cell string welding system according to claim 3, characterized in that: The pre-pressing component is installed on the mounting frame, and the pre-pressing component is arranged between the tooling grabbing component and the battery cell adsorption component; The mutual distances among the tool grabbing component, the pre-pressing component and the battery cell adsorption component are adjustable.

5. The battery cell string welding system according to any one of claims 1 to 4, characterized in that: The tooling grabbing component includes at least one electromagnet capable of magnetically adsorbing the pressure welding strip tooling. The electromagnet can adsorb the tooling when power is on and release the tooling when power is off.

6. The battery cell string welding system according to any one of claims 1 to 4, characterized in that: The pressure welding belt device also includes a rotatable mechanical arm and a lifting mechanism installed on the mechanical arm. The main body mechanism is installed at the driving end of the lifting mechanism to be driven to rise and fall by the lifting mechanism.

7. A battery cell string welding method, characterized in that: Using the battery cell string welding system according to any one of claims 1 to 6, the battery cell string welding method comprises: S1, clamping one end of a welding ribbon of a preset length, and pulling and laying the welding ribbon on a welding conveying device; S2, using a pre-pressing component to pre-press the unclamped welding strip section of the welding strip onto the welding conveying device, and releasing the clamped end of the welding strip; S3, pressing the welding tape pressing tool onto the first welding tape segment of the welding tape; S4, stacking the battery cell on the second welding strip segment of the welding strip; Steps S1, S2, S3 and S4 are performed cyclically to form a battery string in which the welding strips and battery cells are stacked in sequence.

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