A film pasting device for a lithium ion battery explosion-proof valve

Abstract

The application discloses a film pasting device for lithium ion battery explosion-proof valves, which comprises vertically distributed upper and lower bottom plates; the upper bottom plate is arranged on the top of the lower bottom plate; the top of the upper bottom plate is provided with a unwinding and feeding mechanism; the left side of the upper bottom plate is provided with a transfer and film pasting mechanism; the upper part of the lower bottom plate is provided with a traction mechanism; the unwinding and feeding mechanism is used for feeding the explosion-proof valve film material belt and conveying the explosion-proof valve film material belt to the transfer and film pasting mechanism; the transfer and film pasting mechanism is used for peeling off the explosion-proof valve protective film in the explosion-proof valve film material belt conveyed from the unwinding and feeding mechanism, and then pasting the explosion-proof valve protective film on the surface of the battery explosion-proof valve to complete the film pasting operation; and the traction mechanism is used for traction operation on the bottom film of the explosion-proof valve film material belt. The film pasting device for lithium ion battery explosion-proof valves can conveniently and reliably past film on the battery explosion-proof valve, ensures the consistency of the film pasting on the battery explosion-proof valve, and improves the quality of the battery film pasting.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium ion battery manufacturing, in particular to a film pasting device for explosion-proof valve of lithium ion battery. BACKGROUND

[0002] Large-capacity lithium ion batteries have become one of the power sources that have attracted much attention due to their high energy density, long cycle life, and green and pollution-free advantages. Large-capacity lithium ion batteries are prone to damage and personal injury during transportation due to their large size and heavy weight. Therefore, reducing the number of large-capacity lithium ion battery transportation is one of the problems that need to be solved in lithium ion battery production engineering.

[0003] Currently, most large-capacity lithium ion power batteries in the industry are in the awkward stage of semi-automatic production combined with automation, and manual transportation of battery flow process is quite common. It cannot guarantee the integrity of the battery appearance and the safety of the transportation personnel.

[0004] Among them, in the film pasting process of the explosion-proof valve of the lithium ion power battery, the film pasting of the explosion-proof valve needs to be completed manually by the on-site staff. The staff needs to transport the battery to the battery explosion-proof valve film pasting place, then paste the explosion-proof valve film of each battery one by one, and then transport the pasted battery to the next process. Based on the large production of lithium ion batteries and the close connection between processes, at least two employees are needed to support the normal process flow. Therefore, the overall production efficiency of the battery is low, the labor cost is high, and the film pasting of the explosion-proof valve is performed manually, which has poor film pasting consistency and seriously affects the battery film pasting quality. SUMMARY

[0005] The purpose of the present application is to provide a film pasting device for explosion-proof valve of lithium ion battery to solve the technical defects of the prior art.

[0006] To this end, the present application provides a film pasting device for explosion-proof valve of lithium ion battery, which comprises an upper bottom plate and a lower bottom plate vertically distributed;

[0007] The upper bottom plate is arranged on the top of the lower bottom plate;

[0008] The top of the upper bottom plate is provided with a unwinding and feeding mechanism;

[0009] The left side of the upper bottom plate is provided with a transfer and film pasting mechanism;

[0010] The upper part of the lower bottom plate is provided with a traction mechanism;

[0011] The unwinding and feeding mechanism is used to provide material support for the unwinding and feeding operation of the explosion-proof valve film strip;

[0012] The transfer and pasting mechanism is used for peeling off the explosion-proof valve protective film in the explosion-proof valve film strip conveyed by the unwinding and feeding mechanism, and then pasting the explosion-proof valve protective film on the surface of the battery explosion-proof valve to complete the pasting operation.

[0013] The battery needing to be pasted with the explosion-proof valve protective film is located at the lower left of the upper base plate.

[0014] The traction mechanism is used for traction operation on the bottom film of the explosion-proof valve film strip, and provides traction force for the explosion-proof valve film strip of the unwinding and feeding mechanism and the transfer and pasting mechanism.

[0015] Preferably, the unwinding and feeding mechanism comprises an unwinding shaft, a magnetic damper and two unwinding guide shafts.

[0016] A roll of explosion-proof valve film strip is wound on the unwinding shaft.

[0017] The magnetic damper is arranged at the top of the upper base plate.

[0018] The output end of the front side of the magnetic damper is connected with the unwinding shaft.

[0019] Preferably, the transfer and pasting mechanism comprises a transfer motor, a transfer traction driven wheel, a transfer traction shaft, a film preparation cylinder, a pasting cylinder, a film strip pressing block, a transfer linear guide rail, a suction disc block, a suction disc, a transfer and pasting mechanism base plate and a film preparation base plate.

[0020] The film preparation base plate horizontally distributed transversely is arranged at the lower part of the front left end of the upper base plate.

[0021] The battery needing to be pasted with the explosion-proof valve protective film is located at the lower left of the film preparation base plate.

[0022] The transfer and pasting mechanism base plate vertically distributed is arranged above the film preparation base plate.

[0023] The transfer linear guide rail horizontally distributed is arranged at the front left end of the upper base plate.

[0024] The slider on the transfer linear guide rail is connected with the transfer and pasting mechanism base plate.

[0025] The film preparation cylinder vertically distributed and the pasting cylinder vertically distributed are respectively arranged at the upper front side and the lower front side of the transfer and pasting mechanism base plate.

[0026] The output end of the bottom of the film preparation cylinder is connected with the top of the pasting cylinder.

[0027] The output end of the bottom of the pasting cylinder is connected with the suction disc block.

[0028] The suction disc is arranged at the bottom of the suction disc block.

[0029] The suction disc is used for adsorbing the explosion-proof valve protective film in the explosion-proof valve film strip.

[0030] The transfer motor is arranged at the middle rear side of the upper bottom plate;

[0031] The power output end of the transfer motor is provided with a transfer traction shaft;

[0032] The transfer traction shaft is provided with a driving wheel;

[0033] The front side of the upper bottom plate is pivotally connected with a transfer traction driven wheel at the left side of the transfer traction shaft;

[0034] The transfer synchronous belt mechanism comprises a transfer synchronous belt and a synchronous belt pressing plate;

[0035] The driving wheel on the transfer traction shaft is connected with the transfer traction driven wheel through the transfer synchronous belt;

[0036] The lower side of the synchronous belt pressing plate is fixedly connected with the transfer synchronous belt;

[0037] The front side of the synchronous belt pressing plate is connected with the transfer film pasting mechanism bottom plate;

[0038] The front side of the upper bottom plate is pivotally connected with two roll-off guide shafts at the lower right side of the transfer traction shaft;

[0039] The two roll-off guide shafts are located above the right end of the film preparation bottom plate.

[0040] Preferably, an optical fiber sensor is arranged above the right top end of the film preparation bottom plate;

[0041] The optical fiber sensor is located at the front side of the upper bottom plate.

[0042] Preferably, a tape pressing block is arranged above the film preparation bottom plate;

[0043] The tape pressing block and the film preparation bottom plate have a gap with a preset height;

[0044] The gap is used for the explosion-proof valve film tape conveyed by the roll-off feeding mechanism.

[0045] Preferably, the traction mechanism comprises a traction motor, a traction shaft and a pressing wheel;

[0046] The traction motor is arranged at the upper rear side of the lower bottom plate;

[0047] The power output end of the traction motor is provided with the traction shaft;

[0048] The right side of the traction shaft is provided with the pressing wheel;

[0049] The gap between the traction shaft and the pressing wheel is used for the bottom film of the explosion-proof valve film tape conveyed by the transfer film pasting mechanism;

[0050] The traction shaft and the compression wheel are in full contact with the bottom film of the explosion-proof valve film material belt.

[0051] Preferably, the traction mechanism is used to pull the explosion-proof valve film material belt in the unwinding feeding mechanism to the film pasting mechanism, and is also used to convey the bottom film of the explosion-proof valve film material belt at the film pasting mechanism to the winding mechanism.

[0052] The middle lower part of the lower base is provided with the winding mechanism.

[0053] The winding mechanism comprises a winding motor, a winding guide shaft, a winding shaft, a winding linear guide rail, a winding detection block and a winding detection sensing sheet.

[0054] The winding motor is arranged at the middle rear side of the lower base.

[0055] The power output end of the winding motor is provided with the winding shaft.

[0056] The front side of the lower base at the left side of the winding shaft is pivotally connected with a winding guide shaft.

[0057] The front side of the lower base at the position between the winding guide shaft and the winding shaft is provided with vertically distributed winding linear guide rails.

[0058] The front side of the winding linear sliding block on the winding linear guide rail is provided with the winding detection block.

[0059] The winding detection block is vertically provided with longitudinally distributed guide rods.

[0060] The right side of the winding detection block is provided with a transversely distributed winding detection sensing sheet.

[0061] Preferably, the front side of the lower base at the positions above and below the winding detection sensing sheet is respectively provided with a winding upper limit sensor and a winding lower limit sensor.

[0062] Preferably, the winding shaft is located directly below the compression wheel in the traction mechanism.

[0063] As can be seen from the technical solutions provided by the present application, compared with the prior art, the present application provides a film pasting device for a lithium ion battery explosion-proof valve, which is designed scientifically, can conveniently and reliably paste the film on the battery explosion-proof valve, ensures the film pasting consistency of the battery explosion-proof valve, improves the film pasting quality of the battery, is beneficial to significantly improving the automation level of the large-capacity lithium ion power battery assembly line, improving the utilization rate of the line body, saving labor cost, and has great production practical significance.

[0064] The film pasting device of the lithium ion battery explosion-proof valve of the application is suitable for use after the helium detection process of the lithium ion power battery is completed and before the battery group disc process, can realize the automatic pasting of the explosion-proof valve film without affecting the original equipment beat, that is, can add the automatic film pasting process under the condition of matching the line body beat, realizes the online film pasting function, effectively reduces the personnel cost and improves the automation level of the production line.

[0065] Through the test, the application realizes the online film pasting function of the lithium ion battery explosion-proof valve, meets the improvement of the automation level of the production line, saves two personnel of explosion-proof valve film pasting personnel and explosion-proof valve protection film detection personnel, realizes the optimized allocation of personnel and saves the labor cost; in addition, the lithium ion battery carrying process is also reduced. The application can reduce the influence of human factors on products in the production process, improve the good product rate and consistency. BRIEF DESCRIPTION OF DRAWINGS

[0066] Figure 1 The front view of the film pasting device of the lithium ion battery explosion-proof valve provided by the application is shown in the figure;

[0067] Figure 2 The partial structure side view of the unwinding and feeding mechanism in the film pasting device of the lithium ion battery explosion-proof valve provided by the application is shown in the figure;

[0068] Figure 3 The structure diagram of the film storage base plate and the explosion-proof valve film material belt thereon in the film pasting device of the lithium ion battery explosion-proof valve provided by the application is shown in the figure;

[0069] Figure 4a The state diagram of the transfer and film pasting mechanism in the film pasting device of the lithium ion battery explosion-proof valve provided by the application when tearing the explosion-proof valve protection film on the explosion-proof valve film material belt is shown in the figure

[0070] Figure 4b The state diagram of the transfer and film pasting mechanism in the film pasting device of the lithium ion battery explosion-proof valve provided by the application when completing the tearing operation of the explosion-proof valve protection film on the explosion-proof valve film material belt is shown in the figure

[0071] Figure 5 The state diagram of the transfer and film pasting mechanism in the film pasting device of the lithium ion battery explosion-proof valve provided by the application when pasting the film on the explosion-proof valve at the top of the battery is shown in the figure;

[0072] Figure 6a The structure diagram of a battery top before the film pasting operation of the explosion-proof valve protection film is shown in the figure;

[0073] Figure 6b The structure diagram of the top of a battery after the film pasting operation by the film pasting device of the lithium ion battery explosion-proof valve provided by the application is shown in the figure. DETAILED DESCRIPTION

[0074] The technical solutions of the present application will be described in detail below with reference to the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0075] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0076] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0077] The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0078] Referring to Figures 1 to 3 , Figure 4a , Figure 4b , Figure 5 , Figure 6a and Figure 6b , the present application provides a film pasting device for lithium ion battery explosion-proof valve, comprising vertically distributed upper bottom plate 100 and lower bottom plate 101;

[0079] The upper bottom plate 100 is arranged on the top of the lower bottom plate 101;

[0080] The top of the upper bottom plate 100 is provided with a unwinding and feeding mechanism 1;

[0081] The left side of the upper bottom plate 100 is provided with a transfer and film pasting mechanism 2.

[0082] The upper part of the lower bottom plate 101 is provided with a traction mechanism 3.

[0083] The middle lower part of the lower bottom plate 101 is provided with a winding mechanism 4.

[0084] The unwinding and feeding mechanism 1 is used to provide material support for the unwinding and feeding operation of the explosion-proof valve film material belt 81.

[0085] It should be noted that the explosion-proof valve film material belt is in a roll shape, and the explosion-proof valve film material belt includes a bottom film and an explosion-proof valve protection film, and the bottom film is distributed with a plurality of explosion-proof valve protection films (thin films) at equal intervals.

[0086] The transfer and film pasting mechanism 2 is used to peel off the explosion-proof valve protection film 811 in the explosion-proof valve film material belt 81 conveyed by the unwinding and feeding mechanism 1, and then paste the explosion-proof valve protection film 811 on the surface of the battery explosion-proof valve to complete the film pasting operation.

[0087] The battery 84 (the explosion-proof valve is located at the top of the battery) which needs to be pasted with the explosion-proof valve protection film at the top is located at the lower left of the upper bottom plate 100.

[0088] The traction mechanism 3 is used to perform traction operation on the explosion-proof valve film material belt 81 at the unwinding and feeding mechanism 1 and the transfer and film pasting mechanism 2 (that is, to provide traction force to the explosion-proof valve film material belt 81 at the unwinding and feeding mechanism 1 and the transfer and film pasting mechanism 2), and then convey the bottom film 810 of the explosion-proof valve film material belt 81 to the winding mechanism 4.

[0089] The winding mechanism 4 is used to wind the bottom film 810 of the explosion-proof valve film material belt 81 conveyed by the traction mechanism 3 (at this time as waste) to realize the recycling operation.

[0090] In the present application, specifically, Figure 5 The battery 84 is vertically placed in the battery conveying channel 840, and the battery conveying channel 840 is in a concave shape as a whole and is composed of a bottom conveying belt and two side protection rollers, which is used to put the middle lower part of the battery 84 and plays a role of conveying the battery.

[0091] Specifically, the battery which needs to be pasted with the film can be directly conveyed by the conveying belt, and the position can be fixed by the positioning cylinder arranged beside the position to be pasted with the film to ensure the consistency of the position.

[0092] In the present application, specifically, Figure 2 The unwinding and feeding mechanism 1 includes an unwinding material shaft 11, a magnetic damper 12 and two unwinding guide shafts 13.

[0093] The explosion-proof valve film material belt 81 is wound on the unwinding material shaft 11;

[0094] The magnetic damper 12 is arranged on the top of the upper bottom plate 100;

[0095] The output end of the front side of the magnetic damper 12 is connected with the unwinding material shaft 11.

[0096] It should be noted that, for the present application, the unwinding feeding mechanism 1 is used for placing the explosion-proof valve film material belt and providing material unwinding support for the traction action of the traction mechanism 3. At the same time, the tension of the unwinding feeding mechanism 1 is controlled through the magnetic damper 12, so as to play a role in tensioning the explosion-proof valve film material belt.

[0097] In the present application, the specific implementation of the transfer and film pasting mechanism 2 includes: a transfer motor, a transfer traction driven wheel 20, a transfer traction shaft 21, a transfer synchronous belt mechanism 22, a film preparation cylinder 23, a film pasting cylinder 24, a material belt pressing block 25, a transfer linear guide rail 26, a suction disc block 28, a suction disc 29, a transfer film pasting mechanism bottom plate 102 and a film preparation bottom plate 103.

[0098] The film preparation bottom plate 103 horizontally distributed transversely is arranged at the lower part of the left end of the front side of the upper bottom plate 100;

[0099] The battery 84 (the explosion-proof valve is located at the top of the battery) needing to be pasted with the explosion-proof valve protection film is located below the left of the film preparation bottom plate 103;

[0100] The vertically distributed transfer film pasting mechanism bottom plate 102 is arranged above the film preparation bottom plate 103;

[0101] The transfer linear guide rail 26 distributed transversely is arranged at the left end of the front side of the upper bottom plate 100;

[0102] The slider on the transfer linear guide rail 26 is connected with the transfer film pasting mechanism bottom plate 102;

[0103] The film preparation cylinder 23 and the film pasting cylinder 24 vertically distributed are respectively arranged at the upper part and the lower part of the front side of the transfer film pasting mechanism bottom plate 102;

[0104] The output end of the bottom part of the film preparation cylinder 23 is connected with the top of the film pasting cylinder 24;

[0105] The output end of the bottom part of the film pasting cylinder 24 is connected with the suction disc block 28;

[0106] The suction disc 29 is arranged at the bottom of the suction disc block 28;

[0107] The suction disc 29 is used for adsorbing the explosion-proof valve protection film 811 in the explosion-proof valve film material belt 81;

[0108] The transfer motor is arranged at the middle part of the rear side of the upper bottom plate 100;

[0109] The power output end of the transfer motor is provided with a transfer traction shaft 21 (the power output end of the transfer motor penetrates through the reserved through hole of the upper bottom plate 100, and then the transfer traction shaft 21 is installed);

[0110] The transfer traction shaft 21 is provided with a driving wheel;

[0111] The front side of the upper bottom plate 100 is pivotally connected (rotatably connected) with a transfer traction driven wheel 20 (used as a guide wheel) at the right position of the transfer traction shaft 21;

[0112] The transfer synchronous belt mechanism 22 includes a transfer synchronous belt and a synchronous belt pressing plate;

[0113] The driving wheel on the transfer traction shaft 21 is connected with the transfer traction driven wheel 20 through the transfer synchronous belt;

[0114] The lower side of the synchronous belt pressing plate is fixedly connected with the transfer synchronous belt;

[0115] The front side of the synchronous belt pressing plate is connected with the transfer film pasting mechanism bottom plate 102.

[0116] It should be noted that the lower side of the synchronous belt pressing plate is horizontally fixed with the transfer synchronous belt, and the front side is vertically fixed with the transfer back plate;

[0117] It should be noted that the lower side of the synchronous belt pressing plate is horizontally fixed on the transfer synchronous belt, and the front side is longitudinally connected with the transfer film pasting mechanism bottom plate 102. When the transfer traction shaft 21 rotates, it will drive the transfer synchronous belt mechanism 22 to move, so as to realize the horizontal movement of the transfer film pasting mechanism bottom plate 102 between the film preparation position and the film pasting position.

[0118] The front side of the upper bottom plate 100 is pivotally connected (i.e. rotatably connected) with two upper and lower spaced distribution unwinding guide shafts 13 at the lower right position of the transfer traction shaft 21;

[0119] The two unwinding guide shafts 13 are located above the right end of the film preparation bottom plate 103.

[0120] Specifically, the top right end of the film preparation bottom plate 103 is provided with an optical fiber sensor 27;

[0121] The optical fiber sensor 27 is located on the front side of the upper bottom plate 100.

[0122] It should be noted that the transfer motor is a stepper motor, which can realize the suction of the explosion-proof valve protection film from the standby film position and synchronous movement with the traction motor in the traction mechanism 3 by controlling the moving speed, acceleration and deceleration time and pulse number, and moves the explosion-proof valve protection film to the film pasting position (specifically, the position above the battery explosion-proof valve on the right side of the standby film bottom plate 103), so as to ensure accurate film pasting.

[0123] Specifically, above the standby film bottom plate 103, a tape pressing block 25 is arranged;

[0124] The gap between the tape pressing block 25 and the standby film bottom plate 103 has a preset height;

[0125] The gap is used for the explosion-proof valve film tape 81 conveyed by the unwinding feeding mechanism 1.

[0126] It should be noted that the preset height of the gap is equal to or slightly greater than the thickness of the explosion-proof valve film tape.

[0127] It should be noted that the tape pressing block 25 is located between the optical fiber sensor 27 and the unwinding guide shaft 13, which plays a role in keeping the explosion-proof valve film tape flat, and assists the transfer and film pasting mechanism 2 to realize accurate positioning function.

[0128] In the present application, specifically, the traction mechanism 3 comprises a traction motor, a traction shaft 31 and a compression wheel 32.

[0129] The traction motor is arranged on the upper rear side of the lower bottom plate 101.

[0130] The power output end of the traction motor is provided with the traction shaft 31.

[0131] The right side of the traction shaft 31 is provided with the compression wheel 32.

[0132] The gap between the traction shaft 31 and the compression wheel 32 is used for the bottom film of the explosion-proof valve film tape conveyed by the transfer and film pasting mechanism 2.

[0133] The traction shaft 31 and the compression wheel 32 are in full compression contact with the bottom film of the explosion-proof valve film tape.

[0134] Specifically, the traction motor is a stepper motor.

[0135] Specifically, the right side of the compression wheel 32 is connected with the compression spring and the compression wheel mounting bracket.

[0136] The compression wheel mounting bracket is fixedly connected with the lower bottom plate 101. Therefore, the compression wheel 32 and the traction shaft 31 are in full compression, which ensures the normal transfer of the bottom film of the explosion-proof valve film tape, and provides traction force for the explosion-proof valve film tape 81 of the unwinding feeding mechanism 1 and the film pasting mechanism 2.

[0137] In a specific implementation, when the optical fiber sensor 27 in the moving and loading mechanism 2 senses the edge of the explosion-proof valve protective film in the explosion-proof valve film strip, a trigger signal is sent to the traction motor;

[0138] The traction motor is used to start the fixed-length mode after receiving the trigger signal sent by the optical fiber sensor 27, specifically: the traction motor drives the traction shaft 31 to rotate, drives the bottom film 810 of the explosion-proof valve film strip 81 to move a set length, and then stops after the explosion-proof valve protective film 811 on the explosion-proof valve film strip 81 is moved to the film preparation position (i.e. the position above the first explosion-proof valve protective film 811 on the leftmost edge of the film preparation bottom plate 103), so as to ensure the accurate positioning of the explosion-proof valve protective film.

[0139] It should be noted that in the present application, the mechanism for moving the explosion-proof valve film strip is the traction mechanism 3, and the explosion-proof valve film strip 81 is worn according to the method shown in the figure. Figure 1 After the explosion-proof valve film strip 81 is worn according to the method shown in the figure, the explosion-proof valve film strip 81 is located between the traction shaft 31 and the compression wheel 32, and as the traction motor rotates, the explosion-proof valve film strip 81 moves downward under the joint action of the traction shaft 31 and the compression wheel 32, and the unwinding and feeding mechanism 1 is unwound, so as to ensure that the explosion-proof valve film strip 81 moves smoothly on the film preparation bottom plate 103 and is not torn;

[0140] When the explosion-proof valve film strip 81 in the film preparation mechanism optical fiber sensor 27 senses the edge of the explosion-proof valve protective film, the fixed-length mode is started, the traction motor drives the traction shaft 31 and the compression wheel 32 to work, and drives the explosion-proof valve film strip 81 (specifically the bottom film of the explosion-proof valve film strip) to move a set length, so as to move the explosion-proof valve protective film to the film preparation position and then stop;

[0141] When the moving and loading mechanism 2 moves to the film preparation position, the film preparation cylinder 23 descends, the suction cup 29 contacts the explosion-proof valve protective film in the explosion-proof valve film strip 81, the vacuum generator is turned on, and the explosion-proof valve protective film is adsorbed. At this time, the moving motor in the moving and loading mechanism 2 and the traction motor in the traction mechanism 3 act at the same time, and the speed and direction are consistent, and move to the film pasting position (i.e. the position above the battery explosion-proof valve 85). With the joint movement of the two mechanisms, the explosion-proof valve protective film is gradually torn off from the edge on the film preparation bottom plate 103 and adsorbed on the suction cup 29 under the joint action of the vacuum adsorption of the moving and loading mechanism 2 and the traction force of the traction mechanism 3. When the suction cup 29 gradually moves away from the edge of the film preparation bottom plate 103, the film tearing action is completed.

[0142] Then, the explosion-proof valve protection film is adsorbed by the suction cup 29 and moved to the film pasting position, at this time, if the film pasting position has a battery and has the film pasting condition, the film pasting cylinder 24 is lowered to paste the explosion-proof valve protection film on the surface of the battery explosion-proof valve (the bottom of the explosion-proof valve protection film has a preset shape of adhesive covering area), the vacuum generator matched with the suction cup 29 is closed, then the film pasting cylinder 23 and the standby film cylinder 24 are raised at the same time, then the moving and pasting mechanism bottom plate 102 in the moving and pasting mechanism 2 is moved to the standby film position, and the film pasting action is completed.

[0143] It should be noted that the transverse movement of the moving and pasting synchronous belt in the moving and pasting synchronous belt mechanism 22 will drive the moving and pasting mechanism bottom plate 102 to move transversely, thereby driving the suction cup 29 to move transversely left and right.

[0144] In the present application, the winding mechanism 4 specifically comprises a winding motor, a winding guide shaft 40, a winding shaft 41, a winding linear guide rail 42, a winding detection block 43 and a winding detection sensing sheet 44.

[0145] The winding motor is arranged at the middle rear side of the lower bottom plate 101.

[0146] The power output end of the winding motor is provided with the winding shaft 41.

[0147] The front side of the lower bottom plate 101 is pivotally (i.e. rotatably) connected with a winding guide shaft 40 at the left side of the winding shaft 41.

[0148] The front side of the lower bottom plate 101 is provided with vertically distributed winding linear guide rails 42 between the winding guide shaft 40 and the winding shaft 41.

[0149] The front side of the winding linear sliding block on the winding linear guide rail 42 is provided with a winding detection block 43.

[0150] The winding detection block 43 is vertically provided with longitudinally distributed guide rods 430.

[0151] The right side of the winding detection block 43 is provided with a transversely distributed winding detection sensing sheet 44.

[0152] Specifically, the front side of the lower bottom plate 101 is provided with a winding upper limit sensor 45 and a winding lower limit sensor 46 respectively at the upper and lower sides of the winding detection sensing sheet 44.

[0153] Specifically, the winding shaft 41 is located directly below the compression wheel 32 in the traction mechanism 3.

[0154] It should be noted that for the present application, the start and stop of the winding motor can be controlled by the winding upper limit sensor 45 and the winding lower limit sensor 46. When the winding detection reed 44 blocks the winding lower limit sensor 46, the winding motor starts to work, thereby performing the winding operation of the bottom film (i.e. waste) of the explosion-proof valve film material belt. When the winding detection reed 44 blocks the winding upper limit sensor 45, the winding motor stops working, thereby stopping the winding operation, and thus the automatic winding function of the waste is realized.

[0155] In particular, the explosion-proof valve film material belt 81 is wound around the two unwinding guide shafts 13, the glue preparation bottom plate 103, the traction shaft 31, the winding guide shaft 40 and the outer wall of the guide rod 430 on the winding detection block 43 in sequence.

[0156] In the present application, in particular, the film pasting device of the present application is located on the battery conveying path (such as a conveying belt for conveying a plurality of batteries) between the existing battery helium detection machine and the battery group tray machine;

[0157] It should be noted that the battery helium detection machine is a device for charging helium in the battery to detect whether it leaks. The battery group tray machine is a device for combining single batteries into a tray and binding information. The reason why the film pasting device of the present application is arranged on the battery conveying path 5 between the existing battery helium detection machine and the battery group tray machine is that the conveying belt space between the battery helium detection machine and the battery group tray machine is sufficient, which is convenient for installation and debugging.

[0158] In the present application, in particular, as shown in Figure 3 , Figure 3 FIG. 8 is a structural schematic view of the explosion-proof valve film material belt 81. The arrow direction is the conveying direction of the explosion-proof valve film material belt 81, and the explosion-proof valve film material belt 81 covers the top of the film preparation bottom plate 103. The explosion-proof valve film material belt 81 includes a bottom film 810 and a plurality of explosion-proof protective films 811. The plurality of explosion-proof protective films 811 (which are thin films) are uniformly attached to the bottom film 810 of the explosion-proof valve film material belt 81, and the explosion-proof protective film 811 has an explosion-proof protective film edge 812.

[0159] It should be noted that for the present application, the material belt pressing block 25 can be used to press the explosion-proof valve film material belt 81 above the film preparation bottom plate 103, so as to ensure the flatness of the material belt.

[0160] In the present application, in particular, the film pasting device further comprises a color detection sensor;

[0161] The color detection sensor is used for detecting the top of the battery, and can be arranged directly above the conveying path of the battery (through an L-shaped support).

[0162] The explosion-proof valve protection film 811 has a preset color (for example, blue);

[0163] When the color detection sensor detects that the top of the battery has the preset color, it is determined that the battery has completed the pasting operation of the explosion-proof valve protection film 811.

[0164] Figure 6a Fig. 1 is a schematic diagram of a state of a battery before film pasting, Figure 6b Fig. 2 is a schematic diagram of a state of a battery after film pasting, the battery explosion-proof valve 85 and the battery two-dimensional code 86 are located between the two pole columns of the battery 84, and the explosion-proof valve protection film 811 of the battery is pasted on the battery explosion-proof valve 85 and the battery two-dimensional code 86. Specifically, in the actual object, the shadow part of the battery explosion-proof valve protection film 811 is a transparent blue explosion-proof valve pasting part, and the remaining part is a transparent two-dimensional code pasting part (to avoid covering the battery two-dimensional code 86), and the color detection sensor can determine whether the battery is pasted with the explosion-proof valve protection film 811 by detecting the blue color in the explosion-proof valve protection film.

[0165] In the present application, specifically, the overall mechanism installation position is located between the battery helium detection machine and the battery pack disc machine.

[0166] In order to more clearly understand the technical solutions of the present application, the working principle of the present application is described below.

[0167] In the present application, Figure 4a Fig. 3 is a schematic diagram of the moving and pasting film mechanism when tearing the explosion-proof valve protection film, Figure 4b Fig. 4 is a schematic diagram of the moving and pasting film mechanism when the explosion-proof valve protection film has completed the film tearing;

[0168] Among them, the explosion-proof valve film material belt 81 covers above the film preparation base plate 103, and is pressed above the film preparation base plate 103 by the material belt pressing block 25, so as to ensure that the material belt is flat, the explosion-proof valve protection film 811 is uniformly pasted on the explosion-proof valve film material belt 81, when the film tearing action is performed, the film preparation cylinder 23 in the moving and pasting film mechanism 2 extends, the vacuum generator is opened, the suction cup 29 is pressed on the upper surface of the explosion-proof valve protection film 811, so as to realize the adsorption of the explosion-proof valve protection film, then the moving motor in the moving and pasting film mechanism 2 moves at the same speed and in the same direction with the traction motor in the traction mechanism 3, after the explosion-proof valve film material belt 81 passes the left edge of the film preparation base plate 103, the explosion-proof valve film material belt 81 moves to the right and down with the traction mechanism 3, the explosion-proof valve protection film 811 is adsorbed on the suction cup 29, and continues to move to the left with the suction cup 29, until it is completely separated from the bottom film in the explosion-proof valve film material belt 81, and the film tearing action is completed, as shown in Fig. 4. Figure 4b

[0169] In the present application, Figure 1 Fig. 5 is a schematic diagram of the moving and pasting film mechanism waiting for film tearing in the standby position, Figure 5 ​The schematic diagram of the film pasting mechanism after film tearing is shown in the figure. When the film tearing mechanism waits at the material position, the film preparation cylinder 23 and the film pasting cylinder 24 are in the retracted state. When the suction cup block 29 in the film pasting mechanism 2 moves to the film pasting position after film tearing, the film pasting cylinder 24 is extended (the film preparation cylinder 23 has been extended when the film tearing action is performed). At this time, the film preparation cylinder 23 and the film pasting cylinder 24 are in the extended state. After the film pasting action is completed, the film preparation cylinder 23 and the film pasting cylinder 24 are retracted at the same time.

[0170] It should be noted that for the present application, the film pasting device is controlled by an electrical control system, which includes a PLC control system, a stepper motor control system and an HMI control system. The overall mechanism is controlled by the PLC, and each manual and automatic function can be completed by operating the HMI interface.

[0171] It should be noted that for the present application, the overall control is achieved through the combination of a programmable logic controller (PLC), a human-machine interface (HMI) and a stepper control system. Specifically, the control interface of the present application is located in the HMI. The overall manual and automatic control of the equipment can be achieved through each control interface in the HMI. The alarm information of the equipment, the action status of each station and the battery condition can be fed back in the HMI, which is convenient for equipment personnel to debug. The field operators can determine the fault point according to the alarm information prompt and the display of each station in the HMI, and can manually adjust the action of each station through the HMI control interface.

[0172] Compared with the prior art, the film pasting device for the explosion-proof valve of the lithium ion battery provided by the present application has the following beneficial effects:

[0173] 1. The film pasting device for the explosion-proof valve of the lithium ion battery provided by the present application can automatically paste the explosion-proof valve film without affecting the original equipment beat after the helium detection process of the lithium ion power battery is completed, before the battery pack disc process, which effectively reduces the personnel cost and improves the automation level of the production line.

[0174] 2. The battery positioning cylinder and the stepper motor (i.e. the transfer motor) can be used together to achieve precise positioning of the battery and ensure the consistency of the film pasting position of the equipment.

[0175] In summary, compared with the prior art, the film pasting device for the explosion-proof valve of the lithium ion battery provided by the present application is designed scientifically, which can conveniently and reliably paste the film on the battery explosion-proof valve, ensure the consistency of the battery explosion-proof valve film pasting, improve the quality of the battery film pasting, and is beneficial to significantly improving the automation level of the large-capacity lithium ion power battery assembly line, improving the utilization rate of the line, saving labor cost, and having great production practical significance.

[0176] The film pasting device of the lithium ion battery explosion-proof valve of the present application is suitable for use after the helium detection process of the lithium ion power battery is completed and before the battery group disc process, can realize the automatic pasting of the explosion-proof valve film without affecting the original equipment rhythm, that is, can add the automatic film pasting process under the condition of matching the line rhythm, realizes the online film pasting function, effectively reduces the personnel cost, and improves the automation level of the production line.

[0177] Through inspection, the present application realizes the online film pasting function of the lithium ion battery explosion-proof valve, meets the improvement of the automation level of the production line, saves two personnel of the explosion-proof valve film pasting personnel and the explosion-proof valve film detection personnel, realizes the optimized allocation of personnel, saves the labor cost, and reduces the lithium ion battery carrying process. The present application can reduce the influence of human factors on the product in the production process, and improve the product yield and consistency.

[0178] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A film pasting device for a burst valve of a lithium ion battery, characterized by, It comprises vertically distributed upper bottom plate (100) and lower bottom plate (101); The upper bottom plate (100) is arranged on the top of the lower bottom plate (101); The top of the upper bottom plate (100) is provided with unwinding feeding mechanism (1); The left side of the upper bottom plate (100) is provided with moving and pasting film mechanism (2); The upper part of the lower bottom plate (101) is provided with traction mechanism (3); The unwinding feeding mechanism (1) is used for providing material support for unwinding and feeding operation of the explosion-proof valve film material belt (81); The moving and pasting film mechanism (2) is used for stripping the explosion-proof valve protective film (811) in the explosion-proof valve film material belt (81) conveyed by the unwinding feeding mechanism (1), and then pasting the explosion-proof valve protective film (811) on the surface of the battery explosion-proof valve to complete the film pasting operation; The battery (84) needing to paste the explosion-proof valve protective film on the top is located at the lower left of the upper bottom plate (100); The traction mechanism (3) is used for traction operation on the bottom film (810) of the explosion-proof valve film material belt (81), and provides traction force on the explosion-proof valve film material belt (81) at the unwinding feeding mechanism (1) and the moving and pasting film mechanism (2); The unwinding feeding mechanism (1) comprises unwinding material shaft (11), magnetic damper (12) and two unwinding guide shafts (13); A roll of explosion-proof valve film material belt (81) is wound on the unwinding material shaft (11); The magnetic damper (12) is arranged on the top of the upper bottom plate (100); The output end of the front side of the magnetic damper (12) is connected with the unwinding material shaft (11); The moving and pasting film mechanism (2) comprises moving motor, moving traction driven wheel (20), moving traction shaft (21), film preparation cylinder (23), film pasting cylinder (24), material belt pressing block (25), moving linear guide rail (26), suction disc block (28), suction disc (29), moving and pasting film mechanism bottom plate (102) and film preparation bottom plate (103); The film preparation bottom plate (103) horizontally distributed transversely is arranged at the lower part of the front side left end of the upper bottom plate (100); The battery (84) needing to paste the explosion-proof valve protective film is located at the lower left of the film preparation bottom plate (103); The moving and pasting film mechanism bottom plate (102) vertically distributed is arranged above the film preparation bottom plate (103); The moving linear guide rail (26) horizontally distributed is arranged at the front side left end of the upper bottom plate (100); The slider on the moving linear guide rail (26) is connected with the moving and pasting film mechanism bottom plate (102); The film preparation cylinder (23) and the film pasting cylinder (24) vertically distributed are respectively arranged at the front side upper part and the front side lower part of the moving and pasting film mechanism bottom plate (102); The output end of the bottom part of the film preparation cylinder (23) is connected with the top of the film pasting cylinder (24); The output end of the bottom part of the film pasting cylinder (24) is connected with the suction disc block (28); The suction disc (29) is arranged at the bottom part of the suction disc block (28); The suction disc (29) is used for adsorbing the explosion-proof valve protective film (811) in the explosion-proof valve film material belt (81); The moving motor is arranged at the middle rear side of the upper bottom plate (100); The power output end of the moving motor is provided with the moving traction shaft (21); The driving wheel is arranged on the moving traction shaft (21); The front side of the upper base plate (100) is pivotally connected with a moving traction driven wheel (20) at the right lower position of the moving traction shaft (21); The moving synchronization belt mechanism (22) comprises a moving synchronization belt and a synchronization belt pressing plate; The driving wheel on the moving traction shaft (21) is connected with the moving traction driven wheel (20) through the moving synchronization belt; The lower side of the synchronization belt pressing plate is fixedly connected with the moving synchronization belt; The front side of the synchronization belt pressing plate is connected with the moving film pasting mechanism base plate (102); The front side of the upper base plate (100) is pivotally connected with two up-and-down spaced distribution unwinding guide shafts (13) at the right lower position of the moving traction shaft (21); The two unwinding guide shafts (13) are located at the right upper position of the right end of the film preparation base plate (103).

2. The film pasting device for a lithium ion battery explosion valve according to claim 1, wherein The top right end of the film preparation base plate (103) is provided with an optical fiber sensor (27); The optical fiber sensor (27) is located at the front side of the upper base plate (100).

3. The film pasting device for the explosion valve of a lithium ion battery according to claim 1, wherein The upper side of the film preparation base plate (103) is provided with a tape pressing block (25); The tape pressing block (25) and the film preparation base plate (103) have a gap with a preset height; The gap is used for conveying the explosion-proof valve film tape (81) through the unwinding feeding mechanism (1).

4. The film pasting device for a lithium ion battery explosion valve according to claim 1, wherein The traction mechanism (3) comprises a traction motor, a traction shaft (31) and a pressing wheel (32); The traction motor is arranged at the upper rear side of the lower base plate (101); The power output end of the traction motor is provided with the traction shaft (31); The right side of the traction shaft (31) is provided with the pressing wheel (32); The gap between the traction shaft (31) and the pressing wheel (32) is used for passing the bottom film of the explosion-proof valve film tape conveyed through the moving film pasting mechanism (2); The traction shaft (31) and the pressing wheel (32) are in full contact with the bottom film of the explosion-proof valve film tape.

5. The film pasting device for a lithium-ion battery explosion valve according to any one of claims 1 to 4, characterized in that, The traction mechanism (3) is used for pulling the explosion-proof valve film tape (81) in the unwinding feeding mechanism (1) to the moving film pasting mechanism (2), and also used for conveying the bottom film of the explosion-proof valve film tape at the moving film pasting mechanism (2) to the winding mechanism (4); The middle lower part of the lower base plate (101) is provided with the winding mechanism (4); The winding mechanism (4) comprises a winding motor, a winding guide shaft (40), a winding shaft (41), a winding linear guide (42), a winding detection block (43) and a winding detection sensing sheet (44); The winding motor is arranged at the middle rear side of the lower base plate (101); The power output end of the winding motor is provided with the winding shaft (41); The front side of the lower base plate (101) is pivotally connected with a winding guide shaft (40) at the left position of the winding shaft (41); The front side of the lower base plate (101) is provided with vertically distributed winding linear guides (42) between the winding guide shaft (40) and the winding shaft (41); The front side of the winding linear sliding block on the winding linear guide (42) is provided with a winding detection block (43); The winding detection block (43) is vertically provided with longitudinally distributed guide rods (430); The right side of the winding detection block (43) is provided with a transversely distributed winding detection sensing sheet (44).

6. The film pasting device for a lithium-ion battery explosion valve according to claim 5, wherein The front side of the lower bottom plate (101) is provided with a winding upper limit sensor (45) and a winding lower limit sensor (46) respectively at the positions of the upper and lower sides of the winding detection inductive sheet (44).

7. The film pasting device for the explosion valve of a lithium ion battery according to claim 5, wherein The winding shaft (41) is located directly below the compression wheel (32) in the traction mechanism (3).

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