Pouch battery cell welding production line and welding method

Abstract

The application discloses a soft package battery cell welding production line, which comprises a longitudinal conveyor table and a transverse conveyor table, the longitudinal conveyor table and the transverse conveyor table are connected to form an L-shaped conveying line, a material taking station, a brow adhesive pasting station, a first pressure detection station, a battery cell loading station, a loading NG discharging station and a work plate circulating conveying system are sequentially arranged on the transverse conveyor table from a feeding end to a discharging end, a soft tab positive / negative electrode pre-welding station, a hard tab loading station, a hard tab bending station, a hard tab positive / negative electrode welding station, a tab cutting station, a tab shaping station and a protective adhesive pasting station are arranged on the work plate circulating conveying system. The welding line is provided with secondary pressure detection, brow adhesive pasting and protective adhesive pasting processes, and each process equipment has complete and independent functions, and can be operated independently or in a line.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of soft package battery cell automatic welding line, in particular to a soft package battery cell welding production line. BACKGROUND

[0002] The problems of the previous soft package battery cell welding line are summarized as follows: 1. Only one pressure detection is performed, which cannot effectively guarantee the qualified rate of products; 2. The eyebrow adhesive and the protective adhesive are manually operated, which is low in efficiency and cannot guarantee the quality; 3. The production line adopts a disc structure, which is high in cost and inconvenient to maintain. SUMMARY

[0003] The present application aims at the above-mentioned defects of the prior art, and provides a soft package battery cell welding production line.

[0004] To solve the above-mentioned defects of the prior art, the technical scheme provided by the present application is as follows: a soft package battery cell welding production line, comprising a longitudinal conveyor table and a transverse conveyor table, the longitudinal conveyor table and the transverse conveyor table are connected to form an L-shaped conveying line, a material taking station, an eyebrow adhesive station, a first pressure detection station, a cell feeding station, an NG discharging station of feeding and a work plate circulating conveying system are sequentially arranged on the transverse conveyor table from an inlet end to an outlet end, a soft tab positive pre-welding station, a soft tab negative pre-welding station, a hard tab feeding station, a hard tab bending station, a hard tab positive welding station, a hard tab negative welding station, a tab cutting station, a tab shaping station and a protective adhesive station are arranged on the work plate circulating conveying system, a cell overturning station, a second pressure detection station, a spacing detection station, a cell discharging station and an NG discharging station of discharging are sequentially arranged on the longitudinal conveyor table, the second pressure detection station and the spacing detection station detect the pressure and the spacing of the cell, the cell whose pressure and spacing are unqualified are carried to the NG discharging station of discharging by a discharging robot, and the cell whose pressure and spacing are qualified are carried to the cell discharging station by the discharging robot, and a discharging trolley is arranged on the cell discharging station.

[0005] As an improvement of the soft package battery cell welding production line, the work plate circulating conveying system drives the product to be conveyed to the soft tab positive pre-welding station, the soft tab negative pre-welding station, the hard tab feeding station, the hard tab bending station, the hard tab positive welding station, the hard tab negative welding station, the tab cutting station, the tab shaping station and the protective adhesive station to process the cell tabs.

[0006] As an improvement of the soft package battery cell welding production line of the application, the cell feeding station carries the battery cell detected by the first pressure detection station to the work plate circulating conveying system or the NG discharging station by the feeding robot, the qualified battery cell detected by the first pressure detection station is carried to the work plate circulating conveying system by the feeding robot, and the unqualified battery cell detected by the first pressure detection station is carried to the NG discharging station by the feeding robot, and the pressure detection and short circuit detection of the battery cell are detected by the first pressure detection station.

[0007] As an improvement of the soft package battery cell welding production line of the application, the work plate circulating conveying system is provided with a work plate elevator at the discharging end, and the work plate circulating conveying system has the mode of circulating work plates in two layers.

[0008] As an improvement of the soft package battery cell welding production line of the application, the scrap of the tab cut by the cutting station is sucked by the suction mechanism, so that the scrap is prevented from entering the battery cell and causing short circuit.

[0009] As an improvement of the soft package battery cell welding production line of the application, the soft tab positive pre-welding station, the soft tab negative pre-welding station, the hard tab positive welding station and the hard tab negative welding station are all provided with ultrasonic welding equipment.

[0010] As an improvement of the soft package battery cell welding production line of the application, after the tab shaping station shapes the tab of the battery cell, the battery cell is moved to the protective glue station, and the protective glue station mainly pastes the welding point protective glue and the hard tab fixing glue.

[0011] As an improvement of the soft package battery cell welding production line of the application, the L-shaped conveying line is covered with a protective cover and a safety grating.

[0012] The advantages of the application are that the welding line increases the secondary pressure detection, the eyebrow glue pasting and the protective glue pasting processes, each process equipment has a complete independent function, and can be operated independently or in a line.

[0013] A soft package battery cell welding method, comprising the following steps:

[0014] S1, the cell welding line adopts a straight line type layout, and works in a mode of circulating work plates in two layers, and the battery cell is moved from the conveying line to the eyebrow glue station by the mechanical hand after the lamination is completed by the lamination machine.

[0015] S2, the battery cell after pasting the eyebrow glue is moved to the first pressure detection station, and the pressure and short circuit detection of the battery cell are performed by the pressure device and the detection equipment, and the detection time is 3 seconds per cell;

[0016] S3. After the first pressure test is completed, the robot will grab the materials and place them at the feeding storage position or the NG discharge position according to the test results.

[0017] S4. After the material is loaded, the cells that pass the first pressure test are transported to the board circulation conveyor line, and the board is transferred to the positive and negative electrode pre-welding station to pre-weld the soft electrode tabs.

[0018] S5. After the pre-welding is completed, the battery cell is welded with hard tabs. Before welding the hard tabs, the positive and negative hard tabs need to be bent first and then picked up by the robot arm and welded to the pre-welded soft tabs.

[0019] S6. After the positive and negative tabs are welded, the battery cell is transferred to the tab cutting area. The tab cutting mold cuts the tabs, and at the same time, the suction mechanism of the cutting station removes the waste to prevent waste from entering the battery cell and causing a short circuit.

[0020] S7. After the electrode tabs are cut, the electrode tabs are shaped. Due to the deformation of soft and hard electrode tabs caused by ultrasonic welding, the shaping mechanism shapes the welding point of the electrode tabs so that the electrode tabs can be glued smoothly in the future.

[0021] S8. After the tabs are shaped, the battery cells are transferred to the adhesive application station to apply solder joint protective adhesive and hard tab fixing adhesive.

[0022] S9. After the adhesive is applied, a second withstand voltage test and electrode spacing test are performed on the battery cell. After the entire cycle is completed, the visual inspection is used to determine whether the product is qualified. The robot removes NG products and unloads them. After the board is unloaded, it is transported to the lower layer and then to the feeding end to complete the entire cycle.

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] 1. The linear layout saves space and makes full use of existing site resources.

[0025] 2. Functional integration and regional division are carried out according to the production process, and the layout of the entire production line process is clear and easy to understand.

[0026] 3. Protective covers and safety light curtains are used to provide comprehensive protection for operators and the robot's work area to ensure personnel safety.

[0027] 4. Safety doors will be installed at appropriate locations throughout the line to facilitate personnel operation and maintenance. Safety light curtains, safety operation buttons, and other supporting measures will be installed at personnel operation stations to prevent misoperation. Each safety door on the line will be equipped with a safety device. If any safety door is opened, all mechanisms and robots on the line will stop working. After the fault is cleared, the operator will confirm the restoration and continue the original set actions.

[0028] 5. Use detection tools to detect errors of main stations, feedback system in time, carry out NG discharge processing, and improve the qualified rate.

[0029] 6. Use robots to work in part positions, facilitate product replacement, save time, and reduce cost waste. BRIEF DESCRIPTION OF DRAWINGS

[0030] The present application and its beneficial technical effects will be described in further detail below according to the accompanying drawings and specific embodiments.

[0031] Figure 1 is a plan view of the present application after removing the protective cover.

[0032] Figure 2 is a schematic view of the three-dimensional structure of the present application.

[0033] Legend name: 1, longitudinal conveyor table 2, transverse conveyor table 3, L-shaped conveying line 4, material taking station 5, eyebrow adhesive station 6, primary pressure detection station 7, cell loading station 8, loading NG discharge station 9, workboard circulating conveying system 10, soft tab positive pre-welding station 11, soft tab negative pre-welding station 12, hard tab loading station 13, hard tab bending station 14, hard tab positive welding station 15, hard tab negative welding station 16, tab cutting station 17, tab shaping station 18, protective adhesive station 19, cell overturning station 20, secondary pressure detection station 21, spacing detection station 22, cell unloading station 23, unloading NG discharge station 24, unloading robot 25, unloading trolley 26, loading robot 27, workboard elevator 28, protective cover. DETAILED DESCRIPTION

[0034] The present application will be described in further detail below according to the accompanying drawings and specific embodiments, but the embodiments of the present application are not limited thereto.

[0035] For example, Figure 1 and Figure 2As shown, a soft package battery cell welding production line includes a longitudinal conveyor table 1 and a transverse conveyor table 2, the longitudinal conveyor table 1 and the transverse conveyor table 2 are connected to form an L-shaped conveying line 3, the transverse conveyor table 2 is sequentially provided with a material taking station 4, a brow adhesive station 5, a first pressure detection station 6, a battery cell feeding station 7, a feeding NG discharging station 8 and a work plate circulating conveying system 9 from the feeding end to the discharging end, the work plate circulating conveying system 9 is provided with a soft tab positive pre-welding station 10, a soft tab negative pre-welding station 11, a hard tab feeding station 12, a hard tab bending station 13, a hard tab positive welding station 14, a hard tab negative welding station 15, a tab cutting station 16, a tab shaping station 17 and a protective adhesive station 18, the longitudinal conveyor table 1 is sequentially provided with a battery cell overturning station 19, a second pressure detection station 20, a spacing detection station 21, a battery cell discharging station 22 and a discharging NG discharging station 23, the second pressure detection station 20 and the spacing detection station 21 detect the pressure and spacing of the battery cell, the battery cell whose pressure and spacing are unqualified is carried to the discharging NG discharging station 23 by a discharging robot 24, the battery cell whose pressure and spacing are qualified is carried to the battery cell discharging station 22 by the discharging robot 24, and the battery cell discharging station 22 is provided with a discharging trolley 25.

[0036] Preferably, the work plate circulating conveying system 9 drives the product to the soft tab positive pre-welding station 10, the soft tab negative pre-welding station 11, the hard tab feeding station 12, the hard tab bending station 13, the hard tab positive welding station 14, the hard tab negative welding station 15, the tab cutting station 16, the tab shaping station 17 and the protective adhesive station 18 to process the tab of the battery cell by conveying the work plate.

[0037] Preferably, the battery cell feeding station 7 carries the battery cell detected by the first pressure detection station 6 to the work plate circulating conveying system 9 or the feeding NG discharging station 8 by a feeding robot 26, the qualified battery cell detected by the first pressure detection station 6 is carried to the work plate circulating conveying system 9 by the feeding robot 26, the unqualified battery cell detected by the first pressure detection station 6 is carried to the feeding NG discharging station 8 by the feeding robot 26, and the first pressure detection station 6 detects the pressure and short circuit of the battery cell.

[0038] Preferably, the discharging end of the work plate circulating conveying system 9 is provided with a work plate elevator 27, and the work plate circulating conveying system 9 works in the mode of two layers of circulating work plates.

[0039] Preferably, the tab cutting station 16 cuts the waste of the tab by a cutting machine, and the waste is sucked by a suction mechanism to prevent the waste from entering the battery cell to cause a short circuit.

[0040] Preferably, the soft tab positive pre-welding station 10, the soft tab negative pre-welding station 11, the hard tab positive welding station 14 and the hard tab negative welding station 15 are provided with ultrasonic welding equipment.

[0041] Preferably, after the tab shaping station 17 shapes the tabs of the battery cell, the battery cell is moved to the protective adhesive station 18, and the protective adhesive station 18 mainly pastes the welding point protective adhesive and the hard tab fixing adhesive.

[0042] Preferably, the L-shaped conveying line 3 is covered with a protective cover 28 and a safety grating. The personnel and robot working area is protected by the protective cover and the safety grating and other measures to ensure personnel safety. The safety door is provided at a reasonable position of the line to facilitate personnel operation and maintenance, and the safety grating, safety operation button and other supporting measures are provided at the personnel operation station to prevent misoperation. Each safety door of the line is provided with a safety device, and once one safety door is opened, all mechanisms and robots of the line stop working, and after the fault is removed, the operation personnel confirm the recovery and continue the original setting action.

[0043] The advantages of the present application are that the novel welding line increases secondary pressure detection, eyebrow adhesive and protective adhesive processes, and each process equipment has complete independent functions and can be operated independently or in series. The short circuit problem caused by primary pressure detection is effectively avoided, and the eyebrow adhesive and protective adhesive processes are automated.

[0044] A soft package battery cell welding method, comprising the following steps:

[0045] S1, the battery cell welding line adopts a straight line layout, and the battery cell is conveyed by the upper and lower two-layer circulating work plates. After the battery cell is stacked by the stacking machine, the mechanical hand moves the battery cell to the eyebrow adhesive station to paste the eyebrow adhesive;

[0046] S2, after the eyebrow adhesive is pasted, the battery cell is moved to the first pressure detection station, and the pressure device and the detection equipment detect the pressure and short circuit of the battery cell, and the detection time is 3 seconds per battery cell;

[0047] S3, after the first pressure detection is completed, the robot grasps the battery cell to the feeding storage position or the NG discharge position according to the detection result;

[0048] S4, after the feeding is completed, the battery cell with the first pressure detection qualified is carried to the work plate circulating conveying line, and the work plate is moved to the positive and negative pre-welding station to pre-weld the soft tab;

[0049] S5, the battery cell after pre-welding is welded with hard tabs. Before the hard tab welding, the positive and negative hard tabs need to be bent first, and then the mechanical hand grasps the soft tab after pre-welding to weld;

[0050] S6, after the positive and negative tab welding is completed, the battery cell is moved to the tab cutting position, the tab cutting die cuts the tab, and the suction mechanism of the cutting station completes the suction of the waste, preventing the waste from entering the battery cell and causing a short circuit;

[0051] S7, after the tab cutting is completed, the tab shaping is performed, the soft and hard tabs are deformed due to ultrasonic welding, and the shaping mechanism shapes the tab welding part, so as to facilitate the subsequent tab glue sticking and flattening;

[0052] S8, after the tab shaping is completed, the battery cell is moved to the glue sticking station, and the protection glue and the hard tab fixing glue are stuck;

[0053] S9, after the glue sticking is completed, the battery cell is subjected to secondary pressure detection and tab spacing detection; after the whole cycle process is completed, whether the product is qualified is judged by vision, and the NG is discharged and discharged by the robot; after the work plate is discharged, the work plate is conveyed to the lower layer and conveyed to the feeding end, and the whole process cycle is completed.

[0054] The application has the following advantages:

[0055] 1. Straight line type layout, saving space, fully utilizing existing site resources.

[0056] 2. According to the production process, the functions are integrated and the areas are divided, and the layout of the whole line process is clear and reasonable.

[0057] 3. The operation personnel and the robot working area adopt protective cover, safety grating and other measures for all-round protection, to ensure the safety of personnel.

[0058] 4. The whole line will open a safety door at a reasonable position, which is convenient for personnel operation and maintenance, and safety grating, safety operation button and other supporting measures are arranged at the personnel operation station to prevent misoperation. Each safety door of the whole line is provided with a safety device, once one safety door is opened, all mechanisms and robots of the whole line stop working, and after the fault is removed, the operation personnel confirm the recovery and continue the original setting action.

[0059] 5. Use detection tools to detect errors in main stations, timely feedback system, NG discharge processing, and improve the qualified rate.

[0060] 6. Part of the position uses robot operation, which is convenient for product replacement, saves time and reduces cost waste.

[0061] Although the embodiments of the application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and structures of the application, and the scope of the application is defined by the appended claims and their equivalent ranges.

Claims

1. A method of welding a pouch cell, characterized by, The method comprises the following steps: S1, the cell welding line adopts a linear layout, and the cells are conveyed in the form of upper and lower circulating work plates, the cells are stacked by a stacking machine, and then the cells are moved by a manipulator from the conveying line to a cell eyebrow adhesive applying station to apply eyebrow adhesive; S2, the cell after applying the eyebrow adhesive is moved to a first pressure detection station, and the pressure and short circuit of the cell are detected by a pressure device and a detection device, and the detection time is 3 seconds per cell; S3, after the first pressure detection is completed, the cell is gripped by a robot to a feeding storage position or an NG discharge position according to the detection result; S4, after the feeding is completed, the cell with the first pressure detection qualified is carried to a work plate circulating conveying line, and the work plate is moved to a positive electrode and a negative electrode pre-welding station to pre-weld soft tabs; S5, after the pre-welding is completed, the cell is welded with hard tabs, and before the hard tab welding, the positive and negative hard tabs need to be bent first, and then the cell is gripped by the manipulator to the soft tab after the pre-welding to be welded; S6, after the positive and negative tabs are welded, the cell is moved to a tab cutting station, the tab cutting die cuts the tabs, and at the same time, the suction mechanism of the cutting station completes the suction of the waste to prevent the waste from entering the cell to cause a short circuit; S7, after the tab cutting is completed, the tab is shaped, the soft and hard tabs are deformed due to ultrasonic welding, the shaping mechanism shapes the tab welding part to facilitate the subsequent tab adhesive application; S8, the cell after the tab shaping is moved to an adhesive applying station to apply welding point protection adhesive and hard tab fixing adhesive; S9, after the adhesive application is completed, the cell is subjected to secondary pressure detection and tab spacing detection, and after the whole circulating process is completed, whether the product is qualified is judged by a vision, and the robot discharges the NG and discharges the material; after the work plate discharging is completed, the work plate is conveyed to the lower layer and conveyed to the feeding end to complete the whole process circulation.

2. A soft package battery cell welding production line using the soft package battery cell welding method of claim 1, comprising a longitudinal conveyor table and a transverse conveyor table, characterized in that, The longitudinal conveyor platform and the transverse conveyor platform are connected to form an L-shaped conveying line, the transverse conveyor platform is sequentially provided with a material taking station, an eyebrow adhesive applying station, a first pressure detection station, a cell feeding station, an NG discharge station and a work plate circulating conveying system from the feeding end to the discharging end, the work plate circulating conveying system is provided with a soft tab positive electrode pre-welding station, a soft tab negative electrode pre-welding station, a hard tab feeding station, a hard tab bending station, a hard tab positive electrode welding station, a hard tab negative electrode welding station, a tab cutting station, a tab shaping station and a protection adhesive applying station, the longitudinal conveyor platform is sequentially provided with a cell overturning station, a secondary pressure detection station, a spacing detection station, a cell discharging station and a discharging NG discharge station, the secondary pressure detection station and the spacing detection station detect the pressure and spacing of the cell, and the cell with one of the pressure and spacing unqualified is carried to the discharging NG discharge station by a discharging robot, and the cell with both the pressure and spacing qualified is carried to the cell discharging station by the discharging robot, and the cell discharging station is provided with a discharging trolley.

3. The soft pack battery cell welding line of claim 2, wherein, The work plate circulating conveying system conveys the product to the soft tab positive electrode pre-welding station, the soft tab negative electrode pre-welding station, the hard tab feeding station, the hard tab bending station, the hard tab positive electrode welding station, the hard tab negative electrode welding station, the tab cutting station, the tab shaping station and the protection adhesive applying station by conveying the work plate to process the tabs of the cell.

4. The soft pack battery cell welding line of claim 3, wherein, The electric core loading station carries the electric core detected by the one-time pressure detection station to the work plate circulation conveying system or the loading NG discharge station through a loading robot, carries the qualified electric core detected by the one-time pressure detection station to the work plate circulation conveying system by the loading robot, carries the unqualified electric core detected by the one-time pressure detection station to the loading NG discharge station by the loading robot, and detects the pressure and short circuit of the electric core by the one-time pressure detection station.

5. The soft pack battery cell welding line of claim 4, wherein, The work plate circulation conveying system is provided with a work plate elevator at the discharging end, and has two layers of circulating work plates working in an up-down mode.

6. The soft-pack battery cell welding line of claim 5, wherein, The scrap of the tab cutting station is cut by a cutting machine, and the suction mechanism completes the suction of the scrap to prevent the scrap from entering the electric core and causing a short circuit.

7. The soft-pack battery cell welding line of claim 6, wherein, The soft tab positive pre-welding station, the soft tab negative pre-welding station, the hard tab positive welding station and the hard tab negative welding station are all provided with ultrasonic welding equipment.

8. The soft-pack battery cell welding line of claim 7, wherein, After the tab shaping station shapes the electric core tab, the electric core is moved to the protective glue station, and the protective glue station mainly pastes the welding point protective glue and the hard tab fixing glue.

9. The soft pack battery cell welding line of claim 7, wherein, The L-shaped conveying line is covered with a protective cover and a safety grating.

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