A soft package lithium ion battery pack tab bending and flattening device and method

Abstract

The application discloses a kind of soft package lithium ion battery pack tab's bending and flattening device and method, the device includes rack, tab bending and flattening mechanism and battery pack positioning mechanism;The method comprises: one, the position of fixed soft package battery pack;Two, bend and pre-press flat tab;Three, soft package battery pack shift;Four, tab is flattened;Five, take out soft package battery pack.The application utilizes this bending and flattening device to bend and flatten tab, tab bending pliers is inserted from the side of tab, and chamfer is opened in the end of tab bending pliers, effectively prevent tab bending failure problem caused by soft package tab protruding position skew;Simultaneously, using first linear guide screw slide table to control tab bending module, can accurately control the consistency of tab bending direction, avoid the problem such as direction not right, size not one caused by artificial bending, can greatly reduce the labor intensity of staff, reduce manpower and human investment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of lithium battery assembly production, in particular to a soft package lithium ion battery pack tab bending and flattening device and method. BACKGROUND

[0002] Polymer lithium ion soft package battery is widely used in plant protection unmanned aerial vehicles and energy storage battery products in recent years due to its flexible shape and size, fast charging speed, excellent cycle characteristics, environmental friendliness and other advantages. Generally, the polymer lithium ion battery cell group is composed of multiple small capacity single batteries combined in parallel or series. Laser production and processing technology, as a kind of traditional welding technology, has been widely used in lithium battery production and manufacturing equipment. Compared with the traditional welding method, laser welding technology is more advanced, has high economic benefits, and safety hazards are well handled. When using laser welding, the product tab to be welded needs to be bent and flattened to the reflow pad or the connecting plate pad in advance. Conventionally, we use manual tab bending and roller flattening, which results in low production efficiency, bending direction errors, and cannot meet the requirements of production technology. Therefore, a device capable of realizing tab bending and flattening is proposed to solve the above problems. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a soft package lithium ion battery pack tab bending and flattening device to solve the above problems. When the tab bending and flattening device is used to bend and flatten the tab, the tab bending pliers are inserted from the side of the tab, and a chamfer is formed at the end of the tab bending pliers, which effectively prevents the bending failure caused by the skew of the soft package tab extension position. At the same time, the first linear guide screw sliding table is used to control the tab bending module, which can accurately control the consistency of the tab bending direction, avoid the problems of incorrect direction and inconsistent size caused by manual bending, greatly reduce the labor intensity of workers, and reduce the investment in manpower and resources.

[0004] To solve the above technical problems, the technical solution adopted by the present application is: a soft package lithium ion battery pack tab bending and flattening device, characterized by: comprising a rack, a tab bending and flattening mechanism arranged on the rack, and a battery pack positioning mechanism arranged on the rack and used to fix the position of the tab bending and flattening mechanism.

[0005] The rack comprises a box type rack platform, a mounting rack body arranged on the box type rack platform, and a moving assembly arranged at the bottom of the box type rack platform.

[0006] The tab bending and flattening mechanism comprises a tab bending unit and a tab flattening unit arranged on the bottom surface of the upper fixed plate.

[0007] The tab bending unit includes a first linear guide screw slide horizontally arranged on the bottom surface of the upper fixed plate and a tab bending module arranged on the slider of the first linear guide screw slide. The first linear guide screw slide and the tab bending module are connected by a first transition plate arranged horizontally.

[0008] The tab bending module includes a width adjustment component disposed on the first transition plate, two first height adjustment cylinders both vertically disposed at the bottom of the width adjustment component, and a tab bending component disposed at the bottom of the first height adjustment cylinder; the width adjustment component and the first height adjustment cylinder are connected by two symmetrically arranged connecting plates.

[0009] The width adjustment assembly includes two width adjustment guide rails that are both horizontally arranged at the bottom of the first transition plate, two first transition blocks that are both arranged below the width adjustment guide rails, and a width adjustment cylinder that is horizontally arranged on one side of the first transition block and used to drive the first transition block to move.

[0010] The area between the two electrode bending components is the electrode bending area. Two electrode bending pliers are provided on the electrode bending components. The electrode bending pliers are arranged in the electrode bending area. The distance between the two electrode bending pliers is the distance between the two electrodes. A chamfer is provided on the end of the electrode bending pliers away from the first height adjusting cylinder.

[0011] The electrode flattening unit includes a second linear guide screw slide horizontally disposed on the bottom surface of the upper fixed plate, two second height adjusting cylinders both vertically disposed below the sliders of the second linear guide screw slide, and a flattening head disposed at the bottom of the second height adjusting cylinder.

[0012] The second linear guide screw slide and the first linear guide screw slide are arranged on the same horizontal line; the second height adjustment cylinder and the second linear guide screw slide are connected by a transition component;

[0013] The battery pack positioning mechanism includes a battery pack positioning component disposed on the top surface of the lower fixed plate and a sliding positioning component disposed on the bottom surface of the lower fixed plate.

[0014] The battery pack positioning assembly includes a first positioning rod, a second positioning rod, and a clamping cylinder that cooperates with the first positioning rod, all disposed on the top surface of the lower fixed plate. The area between the first positioning rod and the second positioning rod is the installation area of ​​the soft-pack battery pack.

[0015] The sliding positioning assembly includes a movable anti-reverse component disposed on the bottom surface of the lower fixed plate, a flattening positioning cylinder disposed on the bottom surface of the lower fixed plate and positioned below the electrode tab flattening unit, and a bending positioning cylinder disposed on the bottom surface of the lower fixed plate and positioned below the electrode tab bending unit; the flattening positioning cylinder is connected to the lower fixed plate through the flattening positioning plate; the bending positioning cylinder is connected to the lower fixed plate through the bending positioning plate;

[0016] The movable anti-reverse component includes a sliding rodless cylinder horizontally disposed on the bottom surface of the lower fixed plate, an anti-reverse seat disposed on the sliding rodless cylinder, and an anti-reverse tongue disposed on the anti-reverse seat and extending to the top surface of the lower fixed plate. The top surface of the anti-reverse tongue is an inclined surface, and the top surface of the anti-reverse tongue gradually slopes downward along the direction close to the mounting ear.

[0017] The above-mentioned bending and flattening device for the tabs of a soft-pack lithium-ion battery pack is characterized in that: the moving component includes a plurality of moving wheels all disposed at the bottom of the box-type frame platform, the moving wheels are provided with buckles, and the moving wheels are mounted on the bottom of the box-type frame platform by a mounting bracket.

[0018] The aforementioned bending and flattening device for the tabs of a soft-pack lithium-ion battery pack is characterized in that: the mounting frame includes a lower fixed plate horizontally disposed on the top of the box-type frame platform, an upper fixed plate horizontally disposed directly above the lower fixed plate, and a plurality of adjusting guide columns vertically disposed between the lower fixed plate and the upper fixed plate; a plurality of horizontal supports are disposed on the top surfaces of both the lower fixed plate and the upper fixed plate, and the number of horizontal supports on the lower fixed plate and the number of horizontal supports on the upper fixed plate are equal and correspond one-to-one; the bottom end of the adjusting guide column is inserted into the horizontal support of the lower fixed plate, and the top end of the adjusting guide column is inserted into the horizontal support of the upper fixed plate.

[0019] The above-mentioned bending and flattening device for the tabs of a soft-pack lithium-ion battery pack is characterized in that: the transition component includes a second transition plate horizontally arranged at the bottom of the slider of the second linear guide screw slide and two mounting blocks symmetrically arranged at the bottom of the second transition plate; the top of the second height adjusting cylinder is mounted on the mounting block, the bottom of the second height adjusting cylinder is provided with the second transition block, and the flattening head is arranged at the bottom of the second transition block.

[0020] The above-mentioned bending and flattening device for the tabs of a soft-pack lithium-ion battery pack is characterized in that: the anti-reverse seat is provided with a mounting ear, the anti-reverse tongue is connected to the anti-reverse seat through the mounting ear, and a spring is provided between the anti-reverse seat and the anti-reverse tongue.

[0021] The above-mentioned bending and flattening device for the tabs of a soft-pack lithium-ion battery pack is characterized in that: a sliding groove for the movement of the anti-reverse tongue is provided in the middle of the lower fixing plate, and the sliding groove is arranged along the length direction of the lower fixing plate; the lower fixing plate is also provided with a first through hole for the piston rod of the flattening positioning cylinder to pass through and a second through hole for the piston rod of the bending positioning cylinder to pass through.

[0022] The above-mentioned bending and flattening device for the tabs of a soft-pack lithium-ion battery pack is characterized in that: the width adjusting guide rail is perpendicular to the first transition block, and the first transition block is arranged along the length direction of the first linear guide rail screw slide; the width adjusting guide rail and the first transition block are connected by an auxiliary slider; the width adjusting cylinder is connected to the first transition plate through a connecting bracket, and the piston rod of the width adjusting cylinder passes horizontally through the first transition plate and is installed on the first transition block.

[0023] This invention also provides a method for bending and flattening the tabs of a pouch lithium-ion battery pack using a bending and flattening device, characterized by comprising the following steps:

[0024] Step 1: Fix the position of the pouch battery pack, the process is as follows:

[0025] Step 101: Activate the bending and positioning cylinder, and extend the piston rod of the bending and positioning cylinder to the top surface of the lower fixed plate;

[0026] Step 102: Push the soft-pack battery pack into the installation area from the side near the tab bending unit. When the soft-pack battery pack and the piston rod of the bending positioning cylinder abut against each other, and the anti-reverse tongue pops out and abuts against the bottom of the soft-pack battery pack, stop pushing the soft-pack battery pack.

[0027] Step 103: Activate the clamping cylinder to bring the piston rod of the clamping cylinder into contact with the soft-pack battery pack;

[0028] Step 2: Bend and pre-press the flat tabs, as follows:

[0029] Step 201: Start the first linear guide screw slide and insert one of the tab bending pliers away from the anti-reverse tongue between the second and third tabs of the soft-pack battery pack, and the tab bending plier is positioned in the middle between the second and third tabs. Then, insert the other tab bending plier into the front side of the first tab.

[0030] Step 202: Activate the width adjustment cylinder. The piston rod of the width adjustment cylinder extends to reduce the distance between the two first transition blocks until the tab bending pliers are fully inserted between the tabs, maintaining the distance between the two first transition blocks.

[0031] Step 203: Activate the first linear guide screw slide to move the tab bending module to the right by one tab spacing, while bending the first and third tabs to the right; then activate the first height adjustment cylinder to move the tab bending component downward, and the tab bending clamp pre-presses the first and third tabs flat; wherein, the tab spacing is the spacing between two adjacent tabs in a single battery cell;

[0032] Step 204: Reverse start the first height adjustment cylinder to drive the electrode bending component to move upward, reverse start the first linear guide screw slide to drive the electrode bending module to move two electrode spacings to the left, and at the same time bend the second electrode to the left; then adjust the first height adjustment cylinder to drive the electrode bending component to move downward, and the electrode bending pliers pre-press the second electrode flat.

[0033] Step 205: Reverse start the width adjusting cylinder. The piston rod of the width adjusting cylinder retracts, widening the gap between the two first transition blocks until the tab bending pliers withdraw from between the tabs.

[0034] Step 206: Start the first linear guide screw slide, which drives the tab bending module to move four tab spacings away from the anti-reverse tongue. Repeat steps 201 to 205 until the bending and pre-flattening of all tabs on the soft-pack battery pack is completed.

[0035] Step 3: Relocation of the pouch battery pack, the process is as follows:

[0036] Step 301: Reverse start the clamping cylinder, and the piston rod of the clamping cylinder retracts and disengages from the soft-pack battery pack;

[0037] Step 302: Simultaneously activate the bending and positioning cylinder. The piston rod of the bending and positioning cylinder retracts until the top surface of the piston rod of the bending and positioning cylinder is flush with the top surface of the lower fixed plate.

[0038] Step 303: Activate the leveling and positioning cylinder, and extend the piston rod of the leveling and positioning cylinder to the top surface of the lower fixed plate;

[0039] Step 304: Activate the sliding rodless cylinder to move the anti-reverse seat towards the electrode flattening unit. Under the push of the anti-reverse tongue, the soft-pack battery pack moves towards the electrode flattening unit until the soft-pack battery pack and the piston rod of the flattening positioning cylinder abut against each other.

[0040] Step 305: Reverse start the sliding rodless cylinder to move the anti-reverse seat away from the electrode flattening unit until the anti-reverse tongue returns to the initial position;

[0041] Step 4: Flatten the tabs, the process is as follows:

[0042] Step 401: Start the second linear guide screw slide. The second linear guide screw slide drives the transition component to move until the flattening head moves directly above the first pre-flattened tab.

[0043] Step 402: Activate the second height adjustment cylinder. The piston rod of the second height adjustment cylinder extends, driving the leveling head to move downwards and level the pre-pressed electrode tabs.

[0044] Step 403: Reverse start the second height adjustment cylinder. The piston rod of the second height adjustment cylinder retracts, causing the leveling head to move upward.

[0045] Step 404: Start the second linear guide screw slide. The second linear guide screw slide drives the transition component to continue moving until the leveling head moves directly above the second pre-pressed tab. Repeat steps 402 to 403 until the leveling work of all pre-pressed tabs is completed. The second linear guide screw slide drives the transition component to reset.

[0046] Step 5: Remove the pouch battery pack: Reverse the operation of the leveling and positioning cylinder, and the piston rod of the leveling and positioning cylinder will retract until it is flush with the top surface of the lower fixing plate; the worker will then remove the pouch battery pack from the installation area.

[0047] Compared with the prior art, the present invention has the following advantages:

[0048] 1. The present invention combines the tab bending unit and the tab flattening unit through the battery pack positioning mechanism, thereby effectively reducing the intensity of manual labor and improving work efficiency.

[0049] 2. This invention simplifies the structure and significantly improves efficiency by setting two electrode bending components, each with two electrode bending pliers. When bending the electrode, the pliers are inserted once and both sides are bent simultaneously.

[0050] 3. This invention utilizes the cooperation of the second linear guide screw slide and the second height adjustment cylinder to flatten the pre-pressed electrode tabs with a flattening head, effectively ensuring the flatness and tightness of the electrode tabs to be welded and the welding pads, thus guaranteeing stable and reliable laser welding quality.

[0051] 4. In this invention, when bending and flattening the tab using this bending and flattening device, the tab bending pliers are inserted from the side of the tab, and a chamfer is made at the end of the tab bending pliers. This effectively prevents bending failure caused by the skewed extension position of the soft-pack tab. At the same time, the first linear guide screw slide is used to control the tab bending module, which can accurately control the consistency of the tab bending direction and avoid problems such as incorrect direction and inconsistent size caused by manual bending. This can greatly reduce the labor intensity of workers and reduce the input of human resources.

[0052] In summary, when the present invention uses this bending and flattening device to bend and flatten the electrode tab, the electrode tab bending pliers are inserted from the side of the electrode tab, and a chamfer is made at the end of the electrode tab bending pliers, which effectively prevents bending failure caused by the misalignment of the soft-pack electrode tab. At the same time, the electrode tab bending module is controlled by the first linear guide screw slide, which can accurately control the consistency of the electrode tab bending direction, avoid problems such as incorrect direction and inconsistent size caused by manual bending, and greatly reduce the labor intensity of workers and reduce the input of human resources.

[0053] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0054] Figure 1 This is a structural diagram of the present invention.

[0055] Figure 2 This is a schematic diagram of the structure of the tab bending unit of the present invention.

[0056] Figure 3 This is a schematic diagram of the structure of the tab flattening unit of the present invention.

[0057] Figure 4 This is an exploded view of the battery pack positioning mechanism of the present invention.

[0058] Figure 5 This is a schematic diagram showing the installation state of the electrode bending pliers of the present invention inserted into the electrode tab.

[0059] Figure 6 This is a schematic diagram of the construction state of the electrode lug bent to the right according to the present invention.

[0060] Figure 7 This is a schematic diagram of the construction state of the pre-compressed flat electrode tab of the present invention.

[0061] Figure 8 This is a schematic diagram of the construction state of the electrode lug bent to the left according to the present invention.

[0062] Figure 9 This is a flowchart of the method of the present invention.

[0063] Explanation of reference numerals in the attached figures:

[0064] 1—Rack platform; 1-1—Cabinet door; 2—Casing wheels;

[0065] 3—Mounting bracket; 4—Lower fixing plate; 4-1—Slide groove;

[0066] 4-2—First through hole; 4-3—Second through hole; 5—Upper fixing plate;

[0067] 6—Adjusting guide column; 7—Horizontal support; 8—First linear guide screw slide table;

[0068] 9—First transition plate; 10—Width adjustment guide rail; 11—First transition block;

[0069] 12—Width adjustment cylinder; 13—Connecting bracket; 14—First height adjustment cylinder;

[0070] 15—Electrical tab bending component; 15-1—Electrical tab bending pliers; 16—Connecting plate;

[0071] 17—Second linear guide screw slide; 18—Second height adjustment cylinder; 19—Leveling head;

[0072] 20—Second transition plate; 21—Mounting block; 22—Second transition block;

[0073] 23—First positioning rod; 24—Second positioning rod; 25—Clamping cylinder;

[0074] 6—Sliding rodless cylinder; 27—Isolation seat; 27-1—Mounting ear;

[0075] 28—Anti-reverse tongue; 29—Spring; 30—Flattening and positioning cylinder;

[0076] 31—Flattening positioning plate; 32—Bending positioning cylinder; 33—Bending positioning plate;

[0077] 34—Auxiliary slider; 35—Soft-pack battery pack; 36—Alt tab. Detailed Implementation

[0078] like Figures 1 to 4 The device shown is a bending and flattening device for the tabs of a soft-pack lithium-ion battery pack, including a frame, a tab bending and flattening mechanism disposed on the frame, and a battery pack positioning mechanism disposed on the frame and used to fix the position of the tab bending and flattening mechanism.

[0079] The rack includes a box-type rack platform 1, a mounting frame disposed on the box-type rack platform 1, and a movable component disposed at the bottom of the box-type rack platform 1;

[0080] The electrode bending and flattening mechanism includes an electrode bending unit and an electrode flattening unit disposed on the bottom surface of the upper fixed plate 5.

[0081] The tab bending unit includes a first linear guide screw slide 8 horizontally arranged on the bottom surface of the upper fixed plate 5 and a tab bending module arranged on the slider of the first linear guide screw slide 8. The first linear guide screw slide 8 and the tab bending module are connected by a first transition plate 9 arranged horizontally.

[0082] The tab bending module includes a width adjustment component disposed on the first transition plate 9, two first height adjustment cylinders 14 both vertically disposed at the bottom of the width adjustment component, and a tab bending component 15 disposed at the bottom of the first height adjustment cylinder 14; the width adjustment component and the first height adjustment cylinder 14 are connected by two symmetrically arranged connecting plates 16.

[0083] The width adjustment assembly includes two width adjustment guide rails 10 that are horizontally arranged at the bottom of the first transition plate 9, two first transition blocks 11 that are both arranged below the width adjustment guide rails 10, and a width adjustment cylinder 12 that is horizontally arranged on one side of the first transition block 11 and is used to drive the first transition block 11 to move.

[0084] The area between the two electrode bending components 15 is the electrode bending area 36. Two electrode bending pliers 15-1 are provided on the electrode bending component 15. The electrode bending pliers 15-1 are arranged in the electrode bending area 36, ​​and the distance between the two electrode bending pliers 15-1 is the distance between two electrodes. The end of the electrode bending pliers 15-1 away from the first height adjusting cylinder 14 has a chamfer.

[0085] The tab leveling unit includes a second linear guide screw slide 17 horizontally arranged on the bottom surface of the upper fixed plate 5, two second height adjusting cylinders 18 both vertically arranged below the sliders of the second linear guide screw slide 17, and a leveling head 19 arranged at the bottom of the second height adjusting cylinder 18.

[0086] The second linear guide screw slide 17 and the first linear guide screw slide 8 are arranged on the same horizontal line; the second height adjustment cylinder 18 and the second linear guide screw slide 17 are connected by a transition component.

[0087] The battery pack positioning mechanism includes a battery pack positioning component disposed on the top surface of the lower fixed plate 4 and a sliding positioning component disposed on the bottom surface of the lower fixed plate 4.

[0088] The battery pack positioning assembly includes a first positioning rod 23, a second positioning rod 24, and a clamping cylinder 25 that cooperates with the first positioning rod 23, all disposed on the top surface of the lower fixing plate 4. The area between the first positioning rod 23 and the second positioning rod 24 is the installation area of ​​the soft-pack battery pack 35.

[0089] The sliding positioning assembly includes a movable anti-reverse component disposed on the bottom surface of the lower fixed plate 4, a flattening positioning cylinder 30 disposed on the bottom surface of the lower fixed plate 4 and positioned below the electrode tab flattening unit, and a bending positioning cylinder 32 disposed on the bottom surface of the lower fixed plate 4 and positioned below the electrode tab bending unit; the flattening positioning cylinder 30 is connected to the lower fixed plate 4 via a flattening positioning plate 31; the bending positioning cylinder 32 is connected to the lower fixed plate 4 via a bending positioning plate 33.

[0090] The movable anti-reverse component includes a sliding rodless cylinder 26 horizontally disposed on the bottom surface of the lower fixed plate 4, an anti-reverse seat 27 disposed on the sliding rodless cylinder 26, and an anti-reverse tongue 28 disposed on the anti-reverse seat 27 and extending to the top surface of the lower fixed plate 4. The top surface of the anti-reverse tongue 28 is an inclined surface, and the top surface of the anti-reverse tongue 28 gradually slopes downward along the direction close to the mounting ear 27-1.

[0091] This invention combines the tab bending unit and tab flattening unit into one bending and flattening station through a battery pack positioning mechanism, effectively reducing manual labor intensity and improving work efficiency.

[0092] This invention simplifies the structure and significantly improves efficiency by setting two electrode bending components 15, each of which is equipped with two electrode bending pliers 15-1. When bending the electrode 36, the two sides are bent simultaneously after being inserted once.

[0093] The present invention utilizes the cooperation of the second linear guide screw slide 17 and the second height adjustment cylinder 18 to flatten the pre-pressed electrode tab 36 with the flattening head 19, effectively ensuring the flatness and tightness of the electrode tab 36 to be welded and the welding pad, and ensuring stable and reliable laser welding quality.

[0094] In this invention, when bending and flattening the tab 36 using this bending and flattening device, the tab bending pliers 15-1 are inserted from the side of the tab 36, and a chamfer is made at the end of the tab bending pliers 15-1, which effectively prevents bending failure caused by the skewed extension position of the soft-pack tab 36; at the same time, the first linear guide screw slide 8 is used to control the tab bending module, which can accurately control the consistency of the bending direction of the tab 36, avoid problems such as incorrect direction and inconsistent size caused by manual bending, and greatly reduce the labor intensity of workers and reduce the input of human resources.

[0095] like Figure 1 As shown, the box-type rack platform 1 is equipped with a cabinet door 1-1, which allows workers to open the cabinet door 1-1 to repair and replace the components inside the box-type rack platform 1.

[0096] In actual use, driven by the width adjusting cylinder 12, the first transition block 11 moves forward or backward, thereby changing the distance between the two first transition blocks 11 and achieving the purpose of changing the width. The connecting plate 16 is vertically arranged at the bottom of the first transition block 11, the first height adjusting cylinder 14 is installed on one side of the connecting plate 16, and the electrode bending member 15 is connected to the piston rod of the first height adjusting cylinder 14.

[0097] like Figure 2 As shown, the two tab bending pliers 15-1 and the tab bending component 15 form a π-shaped structure, creating three areas for inserting the tabs 36. In actual use, the tabs 36 are inserted into the three areas. The tab bending module moves left and right on the first linear guide screw slide 8 to bend the tabs 36. Combined with the first height adjustment cylinder 14, the bent tabs 36 are pre-flattened.

[0098] like Figure 4 As shown, the first positioning rod 23 and the second positioning rod 24 are both horizontally arranged on the top surface of the lower fixing plate 4. The first positioning rod 23 is arranged on one side of the top surface of the lower fixing plate 4, and the second positioning rod 24 is arranged on the other side of the top surface of the lower fixing plate 4. The clamping cylinder 25 and the second positioning rod 24 are arranged on the same side of the top surface of the lower fixing plate 4.

[0099] In actual use, a protective casing is fitted around the outside of the pouch battery pack 35. The protective casing is an openable, closed structure, and its opening and closing are achieved through a latch. The bottom plate of the protective casing contacts the top surface of the lower fixing plate 4. The protective casing positions and supports the pouch battery pack 35, facilitating the operation of the battery pack when the tabs 36 are bent flat.

[0100] like Figure 1 As shown, in this embodiment, the moving component includes a plurality of moving wheels 2, all of which are disposed at the bottom of the box-type rack platform 1. The moving wheels 2 are provided with buckles, and the moving wheels 2 are mounted on the bottom of the box-type rack platform 1 via a mounting bracket 3.

[0101] like Figure 1As shown, there are four movable wheels 2, which are respectively located at the four corners of the box-type frame platform 1. The positions of the movable wheels 2 are fixed by the latches on them, preventing the bending and leveling device from moving during operation and causing a safety accident.

[0102] like Figure 1 As shown, in this embodiment, the mounting frame includes a lower fixing plate 4 horizontally disposed on the top of the box-type frame platform 1, an upper fixing plate 5 horizontally disposed directly above the lower fixing plate 4, and a plurality of adjusting guide columns 6 vertically disposed between the lower fixing plate 4 and the upper fixing plate 5. A plurality of horizontal supports 7 are disposed on the top surfaces of both the lower fixing plate 4 and the upper fixing plate 5. The number of horizontal supports 7 on the lower fixing plate 4 and the number of horizontal supports 7 on the upper fixing plate 5 are equal and correspond one-to-one. The bottom end of the adjusting guide column 6 is inserted into the horizontal support 7 of the lower fixing plate 4, and the top end of the adjusting guide column 6 is inserted into the horizontal support 7 of the upper fixing plate 5.

[0103] like Figure 1 As shown, the upper fixed plate 5 has a through hole for the adjusting guide post 6 to pass through. The through hole is connected to the mounting hole of the horizontal bracket 7 on the upper fixed plate 5. By changing the height of the adjusting guide post 6 extending above the mounting hole, the height between the upper fixed plate 5 and the lower fixed plate 4 can be adjusted, and the equipment height of different products can be quickly adjusted.

[0104] like Figure 3 As shown, in this embodiment, the transition assembly includes a second transition plate 20 horizontally arranged at the bottom of the slider of the second linear guide screw slide 17 and two mounting blocks 21 symmetrically arranged at the bottom of the second transition plate 20; the top of the second height adjusting cylinder 18 is mounted on the mounting block 21, the bottom of the second height adjusting cylinder 18 is provided with a second transition block 22, and the leveling head 19 is arranged at the bottom of the second transition block 22.

[0105] In actual use, the leveling head 19 is made of hard alloy, and the mounting block 21 and the second transition block 22 are insulated with insulating material to isolate the voltage at both ends of the punch. When it is necessary to level the bent tab 36, the leveling head 19 is moved above the tab 36 to be leveled using the second linear guide screw slide 17, and the leveling head 19 is lowered by the second height adjustment cylinder 18 to press down and level the tab 36.

[0106] like Figure 4As shown, in this embodiment, the anti-reverse seat 27 is provided with a mounting ear 27-1, the anti-reverse tongue 28 is connected to the anti-reverse seat 27 through the mounting ear 27-1, and a spring 29 is provided between the anti-reverse seat 27 and the anti-reverse tongue 28.

[0107] like Figure 4 As shown, in this embodiment, the lower fixing plate 4 has a groove 4-1 in the middle for the anti-reverse tongue 28 to move, and the groove 4-1 is arranged along the length of the lower fixing plate 4; the lower fixing plate 4 also has a first through hole 4-2 for the piston rod of the flat positioning cylinder 30 to pass through and a second through hole 4-3 for the piston rod of the bending positioning cylinder 32 to pass through.

[0108] like Figure 2 As shown, in this embodiment, the width adjusting guide rail 10 and the first transition block 11 are perpendicular to each other, and the first transition block 11 is arranged along the length direction of the first linear guide rail screw slide table 8; the width adjusting guide rail 10 and the first transition block 11 are connected by an auxiliary slider 34; the width adjusting cylinder 12 is connected to the first transition plate 9 through a connecting bracket 13, and the piston rod of the width adjusting cylinder 12 passes horizontally through the first transition plate 9 and is installed on the first transition block 11.

[0109] like Figures 1 to 9 The method shown includes the following steps for bending and flattening the tabs of a pouch lithium-ion battery pack using a bending and flattening device:

[0110] Step 1: Fix the position of the pouch battery pack, the process is as follows:

[0111] Step 101: Activate the bending positioning cylinder 32. The piston rod of the bending positioning cylinder 32 extends out and onto the top surface of the lower fixed plate 4.

[0112] Step 102: Push the soft-pack battery pack 35 into the installation area from the side near the tab bending unit. When the soft-pack battery pack 35 and the piston rod of the bending positioning cylinder 32 abut against each other, and the anti-reverse tongue 28 pops out and abuts against the bottom of the soft-pack battery pack 35, stop pushing the soft-pack battery pack 35.

[0113] Step 103: Activate the clamping cylinder 25 so that the piston rod of the clamping cylinder 25 abuts against the soft-pack battery pack 35;

[0114] Step 2: Bend and pre-press the flat tabs, as follows:

[0115] like Figure 5As shown, in step 201, the first linear guide screw slide 8 is activated to insert one of the tab bending pliers 15-1, which is away from the anti-reverse tongue 28, between the second tab 36 and the third tab 36 of the soft-pack battery pack 35, and the tab bending plier 15-1 is positioned in the middle between the second tab 36 and the third tab 36. Then, the other tab bending plier 15-1 is inserted into the front side of the first tab 36.

[0116] Step 202: Activate the width adjustment cylinder 12. The piston rod of the width adjustment cylinder 12 extends to reduce the distance between the two first transition blocks 11 until the tab bending pliers 15-1 are fully inserted between the tabs 36, while maintaining the distance between the two first transition blocks 11.

[0117] like Figure 6 and Figure 7 As shown, in step 203, the first linear guide screw slide 8 is activated, which drives the tab bending module to move to the right by one tab spacing, while bending the first tab 36 and the third tab 36 to the right; then the first height adjustment cylinder 14 is activated, which drives the tab bending component 15 to move downward, and the tab bending clamp 15-1 pre-presses the first tab 36 and the third tab 36 flat; wherein, the tab spacing is the spacing between two adjacent tabs 36 in a single battery cell;

[0118] like Figure 8 As shown, in step 204, the first height adjustment cylinder 14 is started in reverse, which drives the electrode bending component 15 to move upward. The first linear guide screw slide 8 is started in reverse, which drives the electrode bending module to move two electrode spacings to the left, and at the same time bends the second electrode 36 to the left. Then, the first height adjustment cylinder 14 is adjusted, which drives the electrode bending component 15 to move downward. The electrode bending clamp 15-1 pre-presses the second electrode 36 flat.

[0119] Step 205: Reverse start the width adjusting cylinder 12. The piston rod of the width adjusting cylinder 12 retracts, widening the gap between the two first transition blocks 11 until the tab bending pliers 15-1 withdraw from between the tabs 36.

[0120] Step 206: Start the first linear guide screw slide 8 to drive the tab bending module to move four tab spacings away from the anti-reverse tongue 28. Repeat steps 201 to 205 until the bending and pre-flattening of all tabs 36 on the soft pack battery pack 35 is completed.

[0121] Step 3: Relocation of the pouch battery pack, the process is as follows:

[0122] Step 301: Reverse start clamping cylinder 25, the piston rod of clamping cylinder 25 retracts and disengages from the soft-pack battery pack 35;

[0123] Step 302: Simultaneously activate the bending and positioning cylinder 32. The piston rod of the bending and positioning cylinder 32 retracts until the top surface of the piston rod of the bending and positioning cylinder 32 is flush with the top surface of the lower fixed plate 4.

[0124] Step 303: Activate the leveling and positioning cylinder 30. The piston rod of the leveling and positioning cylinder 30 extends out and onto the top surface of the lower fixed plate 4.

[0125] Step 304: Start the sliding rodless cylinder 26, which drives the anti-reverse seat 27 to move closer to the tab flattening unit. The soft-pack battery pack 35 moves closer to the tab flattening unit under the push of the anti-reverse tongue 28 until the soft-pack battery pack 35 and the piston rod of the flattening positioning cylinder 30 abut.

[0126] Step 305: Reverse start the sliding rodless cylinder 26 to drive the anti-reverse seat 27 to move away from the electrode flattening unit until the anti-reverse tongue 28 returns to the initial position;

[0127] In step 305, when the anti-retracting tongue 28 encounters another pouch battery pack 35 bending the tab 36 during its retraction, because the top surface of the anti-retracting tongue 28 is inclined, during the contact between the anti-retracting tongue 28 and the bottom plate of the pouch battery pack 35, the anti-retracting tongue 28 will be pressed down by the bottom plate of the pouch battery pack 35. The spring 29 between the anti-retracting seat 27 and the anti-retracting tongue 28 will be compressed, and the anti-retracting tongue 28 will slide past the bottom of the bottom plate of the pouch battery pack 35. Then, the anti-retracting tongue 28 will pop out under the spring force until it returns to its initial position. The initial position of the anti-retracting tongue 28 is the end of the slide groove 4-1 away from the tab flattening unit.

[0128] Step 4: Flatten the tabs, the process is as follows:

[0129] Step 401: Start the second linear guide screw slide 17. The second linear guide screw slide 17 drives the transition component to move until the flattening head 19 moves directly above the first pre-flattened tab 36.

[0130] Step 402: Start the second height adjustment cylinder 18. The piston rod of the second height adjustment cylinder 18 extends and drives the leveling head 19 to move downward to level the pre-pressed tab 36.

[0131] Step 403: Reverse start the second height adjustment cylinder 18. The piston rod of the second height adjustment cylinder 18 retracts, causing the leveling head 19 to move upward.

[0132] Step 404: Start the second linear guide screw slide 17. The second linear guide screw slide 17 drives the transition component to continue moving until the leveling head 19 moves directly above the second pre-flattened tab 36. Repeat steps 402 to 403 until the leveling work of all pre-flattened tabs 36 is completed. The second linear guide screw slide 17 drives the transition component to reset.

[0133] Step 5: Remove the soft-pack battery pack: Reverse the operation of the leveling and positioning cylinder 30. The piston rod of the leveling and positioning cylinder 30 retracts until it is flush with the top surface of the lower fixing plate 4. The worker then removes the soft-pack battery pack 35 from the installation area.

[0134] In step 403, during the process of flattening the tab 36, in order to ensure the quality of flattening, steps 402 and 403 can be repeated multiple times on the same tab 36.

[0135] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A bending and flattening device for the tabs of a soft-pack lithium-ion battery pack, characterized in that: It includes a frame, a tab bending and flattening mechanism disposed on the frame, and a battery pack positioning mechanism disposed on the frame and used to fix the position of the tab bending and flattening mechanism; The rack includes a box rack platform (1), a mounting frame disposed on the box rack platform (1), and a moving component disposed at the bottom of the box rack platform (1); The electrode bending and flattening mechanism includes an electrode bending unit and an electrode flattening unit disposed on the bottom surface of the upper fixed plate (5); The electrode bending unit includes a first linear guide screw slide (8) horizontally arranged on the bottom surface of the upper fixed plate (5) and an electrode bending module arranged on the slider of the first linear guide screw slide (8). The first linear guide screw slide (8) and the electrode bending module are connected by a first transition plate (9) arranged horizontally. The tab bending module includes a width adjustment component disposed on the first transition plate (9), two first height adjustment cylinders (14) disposed vertically at the bottom of the width adjustment component, and a tab bending component (15) disposed at the bottom of the first height adjustment cylinder (14); the width adjustment component and the first height adjustment cylinder (14) are connected by two symmetrically arranged connecting plates (16); The width adjustment assembly includes two width adjustment guide rails (10) that are both horizontally arranged at the bottom of the first transition plate (9), two first transition blocks (11) that are both arranged below the width adjustment guide rails (10), and a width adjustment cylinder (12) that is horizontally arranged on one side of the first transition block (11) and is used to drive the first transition block (11) to move. The area between the two electrode bending parts (15) is the electrode bending area (36). Two electrode bending pliers (15-1) are provided on the electrode bending parts (15). The electrode bending pliers (15-1) are arranged in the electrode bending area (36). The distance between the two electrode bending pliers (15-1) is the distance between the two electrodes. The end of the electrode bending pliers (15-1) away from the first height adjusting cylinder (14) is chamfered. The electrode flattening unit includes a second linear guide screw slide (17) horizontally arranged on the bottom surface of the upper fixed plate (5), two second height adjustment cylinders (18) both vertically arranged below the sliders of the second linear guide screw slide (17), and a flattening head (19) arranged at the bottom of the second height adjustment cylinder (18). The second linear guide screw slide (17) and the first linear guide screw slide (8) are arranged on the same horizontal line; the second height adjustment cylinder (18) and the second linear guide screw slide (17) are connected by a transition component; The battery pack positioning mechanism includes a battery pack positioning component disposed on the top surface of the lower fixed plate (4) and a sliding positioning component disposed on the bottom surface of the lower fixed plate (4). The battery pack positioning assembly includes a first positioning rod (23), a second positioning rod (24) and a clamping cylinder (25) that cooperate with the first positioning rod (23) on the top surface of the lower fixing plate (4). The area between the first positioning rod (23) and the second positioning rod (24) is the installation area of ​​the soft-pack battery pack (35). The sliding positioning assembly includes a movable anti-reverse component disposed on the bottom surface of the lower fixed plate (4), a flat positioning cylinder (30) disposed on the bottom surface of the lower fixed plate (4) and arranged below the electrode flattening unit, and a bending positioning cylinder (32) disposed on the bottom surface of the lower fixed plate (4) and arranged below the electrode bending unit; the flat positioning cylinder (30) is connected to the lower fixed plate (4) through the flat positioning plate (31); the bending positioning cylinder (32) is connected to the lower fixed plate (4) through the bending positioning plate (33); The movable anti-reverse component includes a sliding rodless cylinder (26) horizontally disposed on the bottom surface of the lower fixed plate (4), an anti-reverse seat (27) disposed on the sliding rodless cylinder (26), and an anti-reverse tongue (28) disposed on the anti-reverse seat (27) and extending to the top surface of the lower fixed plate (4). The top surface of the anti-reverse tongue (28) is an inclined surface, and the top surface of the anti-reverse tongue (28) gradually slopes downward along the direction close to the mounting ear (27-1). The anti-reverse seat (27) is provided with a mounting ear (27-1), and the anti-reverse tongue (28) is connected to the anti-reverse seat (27) through the mounting ear (27-1). A spring (29) is provided between the anti-reverse seat (27) and the anti-reverse tongue (28). The lower fixing plate (4) has a groove (4-1) in the middle for the movement of the anti-reverse tongue (28), and the groove (4-1) is arranged along the length of the lower fixing plate (4); the lower fixing plate (4) also has a first through hole (4-2) for the piston rod of the flat positioning cylinder (30) to pass through and a second through hole (4-3) for the piston rod of the bending positioning cylinder (32) to pass through.

2. The bending and flattening device for the tabs of a soft-pack lithium-ion battery pack according to claim 1, characterized in that: The moving component includes multiple moving wheels (2) all located at the bottom of the box-type rack platform (1). The moving wheels (2) are provided with buckles, and the moving wheels (2) are installed at the bottom of the box-type rack platform (1) via mounting brackets (3).

3. The bending and flattening device for the tabs of a soft-pack lithium-ion battery pack according to claim 1, characterized in that: The mounting frame includes a lower fixing plate (4) horizontally positioned on the top of the box-type frame platform (1), an upper fixing plate (5) horizontally positioned directly above the lower fixing plate (4), and multiple adjusting guide columns (6) vertically positioned between the lower fixing plate (4) and the upper fixing plate (5). Multiple horizontal supports (7) are provided on the top surfaces of both the lower fixing plate (4) and the upper fixing plate (5). The number of horizontal supports (7) on the lower fixing plate (4) and the number of horizontal supports (7) on the upper fixing plate (5) are equal and correspond one-to-one. The bottom end of the adjusting guide column (6) is inserted into the horizontal support (7) of the lower fixing plate (4), and the top end of the adjusting guide column (6) is inserted into the horizontal support (7) of the upper fixing plate (5).

4. A bending and flattening device for the tabs of a soft-pack lithium-ion battery pack according to claim 1, characterized in that: The transition assembly includes a second transition plate (20) horizontally arranged at the bottom of the slider of the second linear guide screw slide (17) and two mounting blocks (21) symmetrically arranged at the bottom of the second transition plate (20); the top of the second height adjusting cylinder (18) is mounted on the mounting block (21), the bottom of the second height adjusting cylinder (18) is provided with a second transition block (22), and the leveling head (19) is arranged at the bottom of the second transition block (22).

5. A bending and flattening device for the tabs of a soft-pack lithium-ion battery pack according to claim 1, characterized in that: The width adjustment guide rail (10) is perpendicular to the first transition block (11), and the first transition block (11) is arranged along the length direction of the first linear guide rail screw slide (8); the width adjustment guide rail (10) and the first transition block (11) are connected by an auxiliary slider (34); the width adjustment cylinder (12) is connected to the first transition plate (9) through a connecting bracket (13), and the piston rod of the width adjustment cylinder (12) passes horizontally through the first transition plate (9) and is installed on the first transition block (11).

6. The method for bending and flattening the tabs of a soft-pack lithium-ion battery pack using the bending and flattening device according to claim 1, characterized in that: Includes the following steps: Step 1: Fix the position of the pouch battery pack, the process is as follows: Step 101: Start the bending positioning cylinder (32), and the piston rod of the bending positioning cylinder (32) extends out and extends to the top surface of the lower fixed plate (4); Step 102: Push the soft-pack battery pack (35) into the installation area from the side near the tab bending unit. When the soft-pack battery pack (35) and the piston rod of the bending positioning cylinder (32) abut against each other, and the anti-reverse tongue (28) pops out and abuts against the bottom of the soft-pack battery pack (35), stop pushing the soft-pack battery pack (35). Step 103: Activate the clamping cylinder (25) so that the piston rod of the clamping cylinder (25) abuts against the soft-pack battery pack (35); Step 2: Bend and pre-press the flat tabs, as follows: Step 201: Start the first linear guide screw slide (8) and insert one of the tab bending pliers (15-1) away from the anti-reverse tongue (28) between the second tab (36) and the third tab (36) of the soft pack battery pack (35), and the tab bending plier (15-1) is positioned in the middle between the second tab (36) and the third tab (36). Then, insert the other tab bending plier (15-1) into the front side of the first tab (36). Step 202: Activate the width adjustment cylinder (12). The piston rod of the width adjustment cylinder (12) extends to reduce the distance between the two first transition blocks (11) until the tab bending pliers (15-1) are fully inserted between the tabs (36) to maintain the distance between the two first transition blocks (11). Step 203: Start the first linear guide screw slide (8) to move the tab bending module to the right by one tab spacing, and bend the first tab (36) and the third tab (36) to the right; then start the first height adjustment cylinder (14) to move the tab bending component (15) downward, and the tab bending clamp (15-1) pre-presses the first tab (36) and the third tab (36) flat; wherein, the tab spacing is the spacing between two adjacent tabs (36) in a single cell; Step 204: Reverse start the first height adjustment cylinder (14) to drive the electrode bending component (15) to move upward, reverse start the first linear guide screw slide (8) to drive the electrode bending module to move two electrode spacings to the left, and at the same time bend the second electrode (36) to the left; then adjust the first height adjustment cylinder (14) to drive the electrode bending component (15) to move downward, and the electrode bending pliers (15-1) pre-press the second electrode (36) flat; Step 205: Reverse start the width adjustment cylinder (12), the piston rod of the width adjustment cylinder (12) retracts, widening the gap between the two first transition blocks (11) until the tab bending pliers (15-1) withdraw from between the tabs (36); Step 206: Start the first linear guide screw slide (8) to drive the tab bending module to move four tab spacings away from the anti-reverse tongue (28). Repeat steps 201 to 205 until the bending and pre-flattening of all tabs (36) on the soft pack battery pack (35) is completed. Step 3: Relocation of the pouch battery pack, the process is as follows: Step 301: Reverse start clamping cylinder (25), the piston rod of clamping cylinder (25) retracts and disengages from the soft-pack battery pack (35); Step 302: Simultaneously activate the bending positioning cylinder (32), and retract the piston rod of the bending positioning cylinder (32) until the top surface of the piston rod of the bending positioning cylinder (32) is flush with the top surface of the lower fixed plate (4). Step 303: Start the leveling and positioning cylinder (30), and the piston rod of the leveling and positioning cylinder (30) extends out and extends to the top surface of the lower fixed plate (4); Step 304: Start the sliding rodless cylinder (26) to drive the anti-reverse seat (27) to move towards the electrode flattening unit. The soft-pack battery pack (35) moves towards the electrode flattening unit under the push of the anti-reverse tongue (28) until the piston rod of the flattening positioning cylinder (30) abuts. Step 305: Reverse start the sliding rodless cylinder (26) to drive the anti-reverse seat (27) to move away from the pole tab flattening unit until the anti-reverse tongue (28) returns to the initial position; Step 4: Flatten the tabs, the process is as follows: Step 401: Start the second linear guide screw slide (17). The second linear guide screw slide (17) drives the transition component to move until the flattening head (19) moves directly above the first tab (36) of the pre-flattened plate. Step 402: Start the second height adjustment cylinder (18). The piston rod of the second height adjustment cylinder (18) extends and drives the leveling head (19) to move downward to level the pre-pressed tab (36). Step 403: Reverse start the second height adjustment cylinder (18). The piston rod of the second height adjustment cylinder (18) retracts, driving the leveling head (19) to move upward. Step 404: Start the second linear guide screw slide (17). The second linear guide screw slide (17) drives the transition component to continue moving until the flattening head (19) moves directly above the second pre-flattened tab (36). Repeat steps 402 to 403 until the flattening work of all pre-flattened tabs (36) is completed. The second linear guide screw slide (17) drives the transition component to reset. Step 5: Remove the soft-pack battery pack: Reverse start the leveling and positioning cylinder (30), the piston rod of the leveling and positioning cylinder (30) retracts and retracts to be flush with the top surface of the lower fixing plate (4); the worker removes the soft-pack battery pack (35) from the installation area.

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