Battery cell tab pre-folding correction mechanism

Abstract

The utility model relates to a battery cell tab pre-folding correction mechanism in the field of pre-folding correction, which comprises a working table and a jig for placing a battery cell, the jig is arranged on the working table, a support frame is arranged on the working table, the support frame is connected with a material moving and conveying device for clamping and driving the battery cell to move, and the material moving and conveying device is arranged on the working table. A tab pre-folding device used for bending a battery cell tab, a tab correction device used for correcting the battery cell tab and a discharging jig used for placing the battery cell are sequentially arranged on the workbench in the conveying direction of the material moving and conveying device, and a detection device used for correcting and detecting the tab is connected to the end, close to the correction station, of the supporting frame. According to the utility model, the position and the shape of the tab of the battery cell can be detected through the detection device, and the skew tab on the battery cell can be accurately corrected through the tab correction device according to data provided by the detection device, so that the yield of connection between the tab and the battery cell and the consistency of product quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of pre-folding correction, especially to the field of battery cell, and specifically relates to a cell tab pre-folding correction mechanism. BACKGROUND

[0002] The tab of the cell, as an important component of the battery, has a wide application field and technical value. The tab of the cell, as an important component of the battery, is mainly responsible for connecting the cell and the external circuit to realize the transmission of current. The tab can be divided into aluminum tab, nickel tab, copper-nickel-plated tab, etc. according to its material, including but not limited to small-sized lithium batteries such as mobile phones, computers, and unmanned aerial vehicles, and large-sized power batteries such as new energy electric vehicles and energy storage power stations. The performance of the tab directly affects the safety and service life of the battery, so the handling of the tab is particularly important in the battery manufacturing process.

[0003] The cell tab pre-folding correction mechanism is a key device in the battery manufacturing process, which mainly functions to pre-fold and correct the tab before the cell assembly to ensure that the tab can be correctly and firmly connected to the cell, while avoiding tab folding and breaking in subsequent processes, and further improving the connection between the tab and the cell. The basic structure of the existing cell tab pre-folding correction mechanism generally includes a pre-folding device and a correction device. The existing tab correction is generally applied to cylindrical electrical properties. The pre-folding device pre-folds the tab at a preset angle. The correction device further corrects and adjusts the pre-folded tab through precise guiding and positioning mechanisms to ensure that it meets the design requirements.

[0004] However, the existing cell tab pre-folding correction mechanism has some defects. First, as the energy density of lithium-ion batteries continues to increase and the thickness of battery substrates continues to decrease, the existing tab connection in the cell generally needs to be placed in the center of the cell to improve the stability and reliability of the tab connection. However, the existing cell lacks a tab deviation correction function, which causes a certain deviation in the connection between the tab and the cell, leading to tab failure in subsequent connection and use, affecting the stability and reliability of the battery, in addition, the structure of some existing tab correction mechanisms is complex, which cannot meet the large-scale and high-efficiency battery production requirements, thereby affecting the correction effect of the tab and the performance and safety of the battery. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve the above defects and provide a cell tab pre-folding correction mechanism to solve the technical problem of the lack of corresponding deviation correction function in the existing tab connection to the cell in the above background technology, which affects the stability and reliability of the subsequent use of the battery tab, thereby being not conducive to the production and use of the cell.

[0006] The utility model discloses a purpose is realized through the following mode:

[0007] The utility model discloses a battery cell tab pre -folding correction mechanism, including work table and the fixture for placing the battery cell, and the fixture sets up on the work table, be provided with support frame on the work table, be connected with the material removal conveying device for clamping and drive battery cell and move on support frame, the work table is provided with feeding station, pre -folding station, correction station and unloading station in proper order along the conveying direction of material removal conveying device, and the pre -folding station, correction station and unloading station on the work table are provided with tab pre -folding device for the tab bending of battery cell, tab correction device for correcting the tab of battery cell and unloading fixture for placing battery cell, and the tab correction device includes the correction clamp that can open -close type clamps tab and is used for drive correction clamp and moves the drive assembly of correction, and the one end close to correction station on support frame is connected with detection device for correcting the detection of tab,

[0008] When the battery cell tab is bent through the tab pre -folding device, through material removal conveying device clamping battery cell and moving to the tab correction device, uses detection device to detect the tab, through drive assembly can drive correction clamp and move to the tab of correction station, thereby making correction clamp can clamp and rectify the tab.

[0009] Further in the above description, the material removal conveying device includes a horizontal movement sliding table, a material taking and clamping assembly slidingly arranged on the horizontal movement sliding table, and a horizontal movement driving motor for driving the material taking and clamping assembly to slide along the horizontal movement sliding table. The horizontal movement sliding table is installed on the inner side of the support frame. The horizontal movement sliding table is connected with the material taking and clamping assembly through a sliding seat. The horizontal movement driving motor is installed on the horizontal movement sliding table. The material taking and clamping assembly can be driven to move by the moving sliding table, so that the material taking and clamping assembly can clamp and convey the battery cell in the feeding station to the corresponding pre-folding station or correction station or unloading station, thereby improving the efficiency and continuity of battery cell production.

[0010] Further in the above description, the material taking and clamping assembly includes a lifting and sliding member, a material taking rack installed on the lifting and sliding member, and a suction accessory for negative pressure adsorption of the battery cell. The lifting and sliding member is installed vertically on the side surface of the sliding seat. The suction accessory is installed on the material taking rack. The sliding seat is connected with a material taking and lifting driving member for driving the material taking rack to perform lifting movement along the lifting and sliding member through a material taking and supporting plate.

[0011] Specifically, the battery cell in the feeding station can be adsorbed and taken by the suction accessory, and can be slid to the corresponding pre-folding station or correction station or unloading station along the moving sliding table. Specifically, the suction accessory can be driven to press and adsorb the corresponding battery cell by the lifting and sliding member. The suction accessory is a negative pressure adsorption disc, so that the battery cell can be adsorbed by negative pressure, thereby achieving adsorption and taking.

[0012] Optionally, in some embodiments, the suction attachment can be provided with several, so that it can be matched with pre-folding and correction for multi-station production and processing, improving the production efficiency of the battery cell.

[0013] Further in the above description, the jig includes a feeding jig, a pre-folding jig and a correction jig, and the top of the feeding jig, the pre-folding jig, the correction jig and the discharging jig is provided with a positioning groove for matching the placement of the battery cell. Specifically, the feeding jig, the pre-folding jig, the correction jig and the discharging jig are matched with the feeding station, the pre-folding station, the correction station and the discharging station, so that the positioning groove on the jig is used for convenient clamping and installing the battery cell.

[0014] Further in the above description, by providing opposite clamping plates on the feeding jig, the pre-folding jig, the correction jig and the discharging jig, the spacing of the positioning groove can be adjusted by the opposite clamping plates to adapt to battery cells of different sizes, further improving the adaptability and convenience of the jig.

[0015] Further in the above description, the support frame is respectively provided with a first pressing block and a second pressing block for matching the pre-folding jig and the correction jig, and the support frame is connected with a first pressing driving element and a second pressing driving element, so that the first pressing driving element and the second pressing driving element can be used to drive the first pressing block and the second pressing block to move up and down relative to the pre-folding jig and the correction jig.

[0016] The first pressing driving element and the second pressing driving element can drive the first pressing block and the second pressing block to press the battery cell on the pre-folding jig and the correction jig, further improving the stability of the subsequent pre-folding or correction of the tab, preventing the displacement of the battery cell on the pre-folding jig and the correction jig, and improving the accuracy and reliability of the pre-folding or correction.

[0017] Further in the above description, the tab pre-folding device includes a Y-axis sliding table, a Z-axis sliding table, a pair of clamping plates and a clamping driving element for driving the pair of clamping plates to open and close upward and downward clamping action, the Y-axis sliding table is installed on the workbench, and one end of the Y-axis sliding table extends towards the pre-folding jig, the Z-axis sliding table is installed vertically on the Y-axis sliding table, so that the Y-axis sliding table can drive the Z-axis sliding table to slide along the Y-axis direction to the side of the pre-folding jig, the clamping driving element is slidingly installed on the Z-axis sliding table, and a pair of clamping plates are respectively installed on the opposite ends of the clamping driving element, and the clamping ends of the pair of clamping plates can extend towards the pre-folding jig, so that the Z-axis sliding table can drive the clamping driving element to slide along the Z-axis direction.

[0018] Since the initial position of the tab is deviated to the upper end of the battery cell, at this time, the pair of clamping plates on the clamping drive member can be moved to the side of the pre-bending jig through the Y-axis sliding table, the tab is clamped by the pair of clamping plates, and the clamping plate clamping the tab is driven to move to the center of the battery cell under the driving of the Y-axis sliding table and the Z-axis sliding table, the tab is bent under the support of the pre-bending jig, and the tab is centered in the preset position of the battery cell.

[0019] The whole bending process needs the clamping plate to continuously clamp the tab, so as to ensure that the tab does not rebound, skew or break during the bending process, and meanwhile, the Y-axis sliding table and the Z-axis sliding table can accurately control the bending angle and the bending position of the tab, thereby laying a good foundation for the subsequent plastic film packaging process and improving the yield and consistency of the product.

[0020] Further in the above description, the driving assembly comprises a moving assembly, a lifting assembly and a correction drive member, the moving assembly is installed on the workbench, and the moving end of the moving assembly extends to the correction jig, the lifting assembly is installed vertically on the moving assembly and can drive the correction drive member to adjust the lifting, the lifting assembly is provided with a mounting plate for mounting the correction drive member, the mounting plate is provided with a guide member, and the correction clamp is slidably installed on the guide member, so that the correction drive member can drive the correction clamp to reciprocally slide along the guide member through the driving end.

[0021] Through the moving assembly, the pair of clamping blocks on the correction clamp can be moved to the side of the pre-bending jig, the tab is clamped by the pair of clamping blocks, and the correction clamp clamping the tab is driven to move to the center of the battery cell along the guide member under the driving of the correction drive member, so that the tab is centered in the preset position of the battery cell.

[0022] Optionally, in some embodiments, the number of correction clamps and correction drive members is matched with the number of tab of the battery cell.

[0023] Further in the above description, the detection device comprises a CCD camera, and a connecting plate for mounting the CCD camera is connected to the support frame through a connecting rod, and the connecting plate can be slidably adjusted along the connecting rod.

[0024] Specifically, the CCD camera is electrically connected with an external controller, so that the CCD camera can be paired with the detection module of the controller after taking a photo of the tab, and the tab correction device is driven by the correction module of the controller to correct the tab.

[0025] The utility model discloses a beneficial effect: through the setting of jig, make the electric core can stably place on the workbench, avoided the movement or the shake of electric core in the processing, thereby improve the precision and stability of processing treatment, the reasonable layout of multistation makes the pre -folding and correction process of electric core tab can orderly, continuously carry out, thereby make material transfer conveying device can clamp and drive electric core along the predetermined path movement, realize the automation transmission of electric core between different stations, reduced manual intervention, improved the automation degree and production efficiency of production line, the tab pre -folding device can carry out accurate bending treatment to electric core tab, ensured that the shape and angle of tab meet the design requirement, the detection device can carry out the correction detection to the position and shape of electric core tab, make the tab correction device on the correction station can according to the data provided by detection device, carry out accurate deviation correction to the skew tab on electric core, make it pass through the open -and -shut type correction clamp and move to the tab nearby to tab, and through the open -and -shut type correction clamp and clamp tab, thereby can under the movement of drive assembly and drive the correction clamp of clamping tab, can correct and adjust the skew tab, reduce the skew deviation of tab on electric core, lay a good foundation for subsequent aluminum plastic film packaging process, improve the yield rate and product quality consistency of tab and electric core connection. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the whole structure schematic diagram of first direction of this embodiment;

[0027] Figure 2 It is the whole structure schematic diagram of second direction of this embodiment;

[0028] Figure 3 It is the local structure connection schematic diagram of this embodiment;

[0029] Figure 4 It is the structure schematic diagram of material transfer conveying device in this embodiment;

[0030] Figure 5 It is the front view angle structure schematic diagram of tab pre -folding device in this embodiment;

[0031] Figure 6 It is the side view angle structure schematic diagram of tab pre -folding device in this embodiment;

[0032] Figure 7 It is the whole structure schematic diagram of tab correction device in this embodiment;

[0033] Figure 8 It is the side view angle structure schematic diagram of tab correction device in this embodiment;

[0034] Figure 9 It is the connection structure schematic diagram of correction clamp in this embodiment;

[0035] Figure 10 It is a partial structure schematic view of the tab correcting device in the embodiment;

[0036] Figure 11 It is a structure schematic view of the detecting device in the embodiment;

[0037] The reference signs in the drawings are as follows:

[0038] 1 - workbench, 2 - support frame, 3 - feeding jig, 4 - pre-folding jig, 5 - correcting jig, 6 - discharging jig, 7 - positioning groove, 8 - first pressing block, 9 - second pressing block, 10 - first pressing driving member, 11 - second pressing driving member, 12 - connecting rod, 13 - connecting plate;

[0039] 100 - material moving and conveying device, 101 - transverse moving slide, 102 - material taking and clamping assembly, 1021 - lifting slide, 1022 - material taking frame, 1023 - suction accessory, 1024 - material taking support plate, 1025 - material taking lifting driving member, 103 - transverse moving driving motor, 104 - sliding seat;

[0040] 200 - tab pre-folding device, 201 - Y-axis slide, 202 - Z-axis slide, 203 - clamping plate, 204 - clamping driving member;

[0041] 300 - tab correcting device, 301 - correcting clamp, 302 - moving assembly, 303 - lifting assembly, 304 - correcting driving member, 305 - mounting plate, 306 - guide, 307 - clamping block;

[0042] 400 - detecting device. DETAILED DESCRIPTION

[0043] The utility model will be described in further detail in combination with the drawings and specific embodiments.

[0044] In the embodiment, refer to Figures 1-11The specific implementation of the cell tab pre-folding correction mechanism includes a workbench 1 and a jig for placing the cell, the jig is arranged on the workbench 1, a support frame 2 is arranged on the workbench 1, a material moving and conveying device 100 for clamping and moving the cell is connected to the support frame 2, an upper material loading station, a pre-folding station, a correction station and a lower material unloading station are sequentially arranged on the workbench 1 along the conveying direction of the material moving and conveying device 100, the pre-folding station, the correction station and the lower material unloading station on the workbench 1 are respectively provided with a tab pre-folding device 200 for cell tab bending, a tab correction device 300 for correcting the cell tab and a lower material unloading jig 6 for placing the cell, the tab correction device 300 includes a correction clamp 301 capable of clamping the tab in an opening and closing manner and a driving assembly for moving and correcting the correction clamp 301, one end of the support frame 2 close to the correction station is connected with a detection device 400 for correcting and detecting the tab;

[0045] When the cell tab is bent by the tab pre-folding device 200, the cell is moved to the tab correction device 300 by the material moving and conveying device 100, the tab is detected by the detection device 400, and the correction clamp 301 can be moved to the tab at the correction station by the driving assembly, so that the correction clamp 301 can clamp and correct the tab.

[0046] Referring to Figure 3 and Figure 4 , the material moving and conveying device 100 includes a transverse sliding table 101, a material taking and clamping assembly 102 slidingly arranged on the transverse sliding table 101 and a transverse driving motor 103 for driving the material taking and clamping assembly 102 to slide along the transverse sliding table 101, the transverse sliding table 101 is installed on the inner side of the support frame 2, the transverse sliding table 101 is connected with the material taking and clamping assembly 102 through a sliding seat 104, and the transverse driving motor 103 is installed on the transverse sliding table 101.

[0047] The material taking and clamping assembly 102 can be driven to move by the moving sliding table, so that the material taking and clamping assembly 102 can clamp and convey the cell at the upper material loading station to the corresponding pre-folding station or correction station or lower material unloading station, thereby improving the efficiency and continuity of cell production. Specifically, the transverse sliding table 101 is composed of a belt driving module, so that the transverse driving motor 103 drives the material taking and clamping assembly 102 to slide along the extension direction of the transverse sliding table 101 through the belt.

[0048] Referring to Figure 3 and Figure 4The taking clamping assembly 102 includes a lifting slide 1021, a taking rack 1022 mounted on the lifting slide 1021, and a suction accessory 1023 for negative pressure adsorption of the battery cell. The lifting slide 1021 is vertically mounted on the side of the sliding seat 104. The suction accessory 1023 is mounted on the taking rack 1022. The sliding seat 104 is connected with a taking lifting driving piece 1025 for driving the taking rack 1022 to move up and down along the lifting slide 1021 through a taking support plate 1024.

[0049] Specifically, the battery cell in the feeding station can be adsorbed and taken by the suction accessory 1023 and can be slid to the corresponding pre-folding station or correction station or discharging station along the moving sliding table. Specifically, the suction accessory 1023 can be driven to press and adsorb the corresponding battery cell by the lifting slide 1021. The suction accessory 1023 is a negative pressure adsorption disc, which can adsorb and take the battery cell by negative pressure adsorption. The lifting driving piece in the embodiment is a gas cylinder. As shown in Figure 4 In the embodiment, the suction accessory 1023 can be provided with six, and each two is provided in a pair, so as to form three pairs for matching feeding, pre-folding, correction and discharging for multi-station continuous production processing, thereby improving the production efficiency of the battery cell.

[0050] Referring to Figure 3 , the jig includes a feeding jig 3, a pre-folding jig 4 and a correction jig 5. The top of the feeding jig 3, the pre-folding jig 4, the correction jig 5 and the discharging jig 6 is provided with a positioning groove 7 for matching and placing the battery cell. The feeding jig 3, the pre-folding jig 4, the correction jig 5 and the discharging jig 6 are matched and arranged corresponding to the feeding station, the pre-folding station, the correction station and the discharging station, so that the positioning groove 7 on the jig is used for conveniently clamping and mounting the battery cell. Specifically, two positioning grooves 7 are provided on each jig in the embodiment, so that two battery cells can be placed at the same time, and are matched with a pair of suction accessories 1023, thereby realizing double-station processing.

[0051] In some embodiments, by arranging opposite clamping plates on the feeding jig 3, the pre-folding jig 4, the correction jig 5 and the discharging jig 6, the spacing of the positioning grooves 7 can be adjusted by the opposite clamping plates to adapt to battery cells of different sizes, thereby further improving the adaptability and installation convenience of the jig.

[0052] Referring to Figure 3 , the support frame 2 is provided with a first pressing block 8 and a second pressing block 9 for matching the pre-folding jig 4 and the correction jig 5, respectively. The support frame 2 is connected with a first pressing driving piece 10 and a second pressing driving piece 11, so that the first pressing driving piece 10 and the second pressing driving piece 11 can drive the first pressing block 8 and the second pressing block 9 to move up and down relative to the pre-folding jig 4 and the correction jig 5, respectively.

[0053] The first pressing driving member 10 and the second pressing driving member 11 are arranged to drive the first pressing block 8 and the second pressing block 9 to press the battery cell on the pre-folding jig 4 and the correction jig 5, thereby improving the stability of the subsequent pre-folding or correction of the tab, preventing the displacement of the battery cell on the pre-folding jig 4 and the correction jig 5, and improving the accuracy and reliability of the pre-folding or correction. The first pressing driving member 10 and the second pressing driving member 11 in the embodiment are both air cylinders, and the support frame 2 is provided with guide rods connected with the pressing blocks, thereby further ensuring the stability and reliability of the lifting of the first pressing block 8 and the second pressing block 9 by the air cylinders.

[0054] With reference to Figure 5 and Figure 6 , the tab pre-folding device 200 comprises a Y-axis sliding table 201, a Z-axis sliding table 202, a pair of clamping plates 203, and a clamping driving member 204 for driving the pair of clamping plates 203 to perform an up-and-down clamping action. The Y-axis sliding table 201 is installed on the workbench 1 and extends to the pre-folding jig 4 at one end. The Z-axis sliding table 202 is installed vertically on the Y-axis sliding table 201, so that the Y-axis sliding table 201 can drive the Z-axis sliding table 202 to slide along the Y-axis direction to the side of the pre-folding jig 4. The clamping driving member 204 is slidingly installed on the Z-axis sliding table 202, and the pair of clamping plates 203 are respectively installed on the opposite ends of the clamping driving member 204. The clamping ends of the pair of clamping plates 203 can extend to the pre-folding jig 4, so that the Z-axis sliding table 202 can drive the clamping driving member 204 to slide along the Z-axis direction.

[0055] Since the initial position of the tab is deviated to the upper end of the battery cell, at this time, the pair of clamping plates 203 on the clamping driving member 204 can be moved to the side of the pre-folding jig 4 by the Y-axis sliding table 201. The tab is clamped by the pair of clamping plates 203, and the clamping plates 203 clamping the tab are driven to move to the center of the battery cell under the driving of the Y-axis sliding table 201 and the Z-axis sliding table 202. Under the pressing support of the pre-folding jig 4 and the first pressing driving member 10, the tab is bent, so that the tab is centered in the preset position of the battery cell. The clamping driving member 204 adopts a finger air cylinder.

[0056] The clamping plates 203 need to continuously clamp the tab during the entire bending process, so as to ensure that the tab does not rebound, skew or break during the bending process. Meanwhile, the Y-axis sliding table 201 and the Z-axis sliding table 202 are both composed of a lead screw transmission module, so that the bending angle and position of the tab can be accurately controlled by the lead screw transmission module, thereby laying a good foundation for the subsequent aluminum-plastic film packaging process and improving the yield and consistency of the aluminum-plastic film packaging products.

[0057] With reference to Figures 7-10The driving assembly comprises a moving assembly 302, a lifting assembly 303 and a correction driving member 304, the moving assembly 302 is installed on the workbench 1, and the moving end of the moving assembly 302 extends towards the correction jig 5, the lifting assembly 303 is vertically installed on the moving assembly 302 and can drive the correction driving member 304 to lift and adjust, the lifting assembly 303 is provided with an installation plate 305 for installing the correction driving member 304, the installation plate 305 is provided with a guide member 306, and the correction clamp 301 is slidingly installed on the guide member 306, so that the correction driving member 304 can drive the correction clamp 301 to reciprocally slide along the guide member 306 through the driving end.

[0058] The opening and closing clamping end of the correction clamp 301 is connected with a pair of clamping blocks 307 for clamping the electrode lug of the battery cell, so that the correction clamp 301 can drive the pair of clamping blocks 307 to open and close the clamping action on the electrode lug.

[0059] Since the position of the electrode lug is easy to deviate to the lateral direction of the battery cell, there is a certain inclination angle between the electrode lug and the battery cell, for example, inner eight, outer eight or skew, etc. At this time, the detection device 400 takes a photo of the electrode lug of the battery cell and matches it with the preset range position of the control system, when the electrode lug is skewed, the pair of clamping blocks 307 on the correction clamp 301 can be moved to the side of the pre-folding jig 4 through the moving assembly 302, the electrode lug is clamped by the pair of clamping blocks 307, and the correction clamp 301 clamping the electrode lug is driven by the correction driving member 304 to move along the guide member 306 to the center of the battery cell, so that the electrode lug is centered in the preset position of the battery cell. The correction driving member 304 is composed of a through-type linear screw stepper motor.

[0060] Specifically, in the embodiment, two groups of correction clamps 301 are provided, and the two groups of correction clamps 301 are symmetrically arranged on the guide member 306. Specifically, the number of correction clamps 301 is four, the number of correction driving members 304 is matched with the number of correction clamps 301, and each correction driving member 304 can drive one correction clamp 301 to slide along the guide member 306, so as to be used for clamping the positive electrode lug and the negative electrode lug arranged on the same side of the battery, so that each correction clamp 301 can clamp the positive electrode lug and the negative electrode lug and correct the deviation under the driving of the correction driving member 304, further ensuring the center distance between the positive electrode lug and the negative electrode lug, laying a good foundation for the subsequent aluminum-plastic film packaging process, and improving the yield and consistency of the product.

[0061] Referring to Figure 11 The detection device 400 comprises a CCD camera, and the support frame 2 is connected with a connecting plate 13 for installing the CCD camera through a connecting rod 12, and the connecting plate 13 can slide and adjust along the connecting rod 12.

[0062] Specifically, the CCD camera is electrically connected with the external controller, so that the CCD camera can take a picture of the tab and match with the detection module of the controller, and the tab correction device 300 is driven by the correction module of the controller to correct the tab.

[0063] In the embodiment, the same side of the square battery cell is provided with one positive tab and one negative tab, and the correction jig 5 is a double station, that is, two positioning grooves 7 are arranged, so that two square battery cells can be placed at the same time, and four correction clamps 301 are used to clamp the corresponding tabs for correction.

[0064] The specific use process of the embodiment is as follows:

[0065] Loading, two square battery cells are placed on the positioning groove 7 of the loading jig 3 through the previous process, the suction accessory 1023 is driven by the transverse sliding table 101 to move above the loading jig 3, and the battery cell is suctioned under the drive of the material taking lifting drive 1025, and is placed on the pre-folding jig 4 through the loading conveying of the transverse sliding table 101,

[0066] Pre-folding, the first pressing block 8 is driven by the first pressing drive 10 to press the battery cell on the pre-folding jig 4, so as to prevent displacement or skewing during subsequent bending, the clamping drive 204 is driven by the Y-axis sliding table 201 and the Z-axis sliding table 202 to move the clamping plate 203 to the tab of the battery cell, and a pair of clamping plates 203 are driven by the clamping drive 204 to clamp the two tabs at the same time, so that the tabs can be bent to the center position of the battery cell under the movement of the Y-axis sliding table 201 and the Z-axis sliding table 202;

[0067] Correction, the pre-folding of the tab and the pressing of the battery cell are released, the battery cell is suctioned by the suction accessory 1023 and moved to the positioning groove 7 of the correction jig 5 along the transverse sliding table 101, the second pressing block 9 is driven by the second pressing drive 11 to press the battery cell on the correction jig 5, the tab is detected by the CCD camera, the CCD is connected with the external control system, the moving assembly 302 can drive the correction clamp 301 to move to the tab, the correction clamp 301 clamps the corresponding tab through a pair of clamping blocks 307, and the correction clamp 301 can be driven by the correction drive 304 to move along the guide 306. Specifically, the positive tab and the negative tab of each battery cell are corrected and centered on the center of the battery cell, so as to adjust the center distance of the positive tab and the negative tab, improve the use stability and reliability of the subsequent battery cell tab, and lay a good foundation for the subsequent aluminum plastic film packaging process, improve the yield of aluminum plastic film packaging and the consistency of products.

[0068] Unloading, the corrected battery cell is moved to the positioning groove of the unloading jig by the transverse sliding table 101 and the suction accessory 1023.

[0069] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the disclosed technical content without departing from the technical solution of the present application, and any equivalent embodiment with equivalent changes is equivalent to the above embodiment. Any simple modification, equivalent change and modification of the above embodiment according to the present application are within the scope of the technical solution of the present application.

Claims

1. A mechanism for correcting pre-folding of electrode tabs of a battery cell, comprising a worktable and a jig for placing the battery cell, the jig being arranged on the worktable, characterized in that: The workbench is provided with a support frame, and a material moving and conveying device for clamping and moving the battery cell is connected to the support frame. The workbench is sequentially provided with a feeding station, a pre-bending station, a correcting station and a discharging station along the conveying direction of the material moving and conveying device. The pre-bending station, the correcting station and the discharging station on the workbench are respectively provided with a tab pre-bending device for tab ear bending of the battery cell, a tab ear correcting device for correcting the tab ear of the battery cell and a discharging jig for placing the battery cell. The tab ear correcting device comprises a correcting clamp capable of opening and closing to clamp the tab ear and a driving assembly for moving and correcting the correcting clamp. One end of the support frame near the correcting station is connected with a detection device for correcting and detecting the tab ear. After the tab ear of the battery cell is bent by the tab ear pre-bending device, the battery cell is moved to the tab ear correcting device by the material moving and conveying device. The tab ear is detected by the detection device. The correcting clamp can be moved to the tab ear of the correcting station by the driving assembly, so that the correcting clamp can clamp and correct the tab ear.

2. The mechanism for correcting the pre-folding of the electrode tab of the battery cell according to claim 1, wherein: The material moving and conveying device comprises a horizontal moving slide, a material taking and clamping assembly slidingly arranged on the horizontal moving slide and a horizontal moving driving motor for driving the material taking and clamping assembly to slide along the horizontal moving slide. The horizontal moving slide is installed on the inner side of the support frame. The horizontal moving slide is connected with the material taking and clamping assembly through a sliding seat. The horizontal moving driving motor is installed on the horizontal moving slide.

3. The mechanism for correcting the pre-folding of the electrode tab of the battery cell according to claim 2, wherein: The material taking and clamping assembly comprises a lifting and sliding member, a material taking frame installed on the lifting and sliding member and a suction member for negative pressure adsorption of the battery cell. The lifting and sliding member is vertically installed on the side surface of the sliding seat. The suction member is installed on the material taking frame. The sliding seat is connected with a material taking and lifting driving member for driving the material taking frame to lift and move along the lifting and sliding member through a material taking and supporting plate.

4. The mechanism for correcting the pre-folding of the electrode tab of the battery cell according to claim 1, wherein: The jig comprises a feeding jig, a pre-bending jig and a correcting jig. The top of each of the feeding jig, the pre-bending jig, the correcting jig and the discharging jig is provided with a positioning groove for placing the battery cell.

5. The mechanism for correcting the pre-folding of the electrode tab of the battery cell according to claim 4, wherein: The support frame is respectively provided with a first pressing block and a second pressing block for the pre-bending jig and the correcting jig. The support frame is connected with a first pressing driving member and a second pressing driving member. The first pressing driving member and the second pressing driving member can be used to drive the first pressing block and the second pressing block to lift and move relative to the pre-bending jig and the correcting jig, respectively.

6. The mechanism for correcting the pre-folding of the electrode tab of the battery cell according to claim 5, wherein: The tab ear pre-bending device comprises a Y-axis slide, a Z-axis slide, a pair of clamping plates and a clamping driving member for driving the pair of clamping plates to perform opening and closing clamping action. The Y-axis slide is installed on the workbench and extends towards the pre-bending jig at one end. The Z-axis slide is vertically installed on the Y-axis slide, so that the Y-axis slide can drive the Z-axis slide to slide along the Y-axis direction to the pre-bending jig. The clamping driving member is slidingly installed on the Z-axis slide. The pair of clamping plates are respectively installed on the opposite ends of the clamping driving member. The clamping ends of the pair of clamping plates can extend towards the pre-bending jig. The Z-axis slide can drive the clamping driving member to slide along the Z-axis direction.

7. The mechanism for pre-correcting the folding of the electrode tabs of the battery cell according to any one of claims 4-6, characterized in that: The driving assembly comprises a moving assembly, a lifting assembly and a correction driving part, the moving assembly is installed on the workbench, and the moving end of the moving assembly extends towards the correction jig, the lifting assembly is installed vertically on the moving assembly and can drive the correction driving part to adjust the lifting, the lifting assembly is provided with an installation plate for installing the correction driving part, the installation plate is provided with a guide part, and the correction clamp is slidably installed on the guide part, so that the correction driving part can drive the correction clamp to reciprocatingly slide along the guide part through the driving end.

8. The mechanism for correcting the pre-folding of the electrode tab of the battery cell according to claim 7, wherein: The opening and closing clamping end of the correction clamp is connected with a pair of clamping blocks for clamping the electrode lug of the battery cell, so that the correction clamp can drive the pair of clamping blocks to perform the opening and closing clamping action on the electrode lug.

9. The mechanism for correcting the pre-folding of the electrode tab of the battery cell according to claim 7, wherein: The detection device comprises a CCD camera, and a connecting plate for installing the CCD camera is connected to the support frame through a connecting rod, and the connecting plate can be adjusted to slide along the connecting rod.

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