Cylindrical battery tab rubber coating equipment

Abstract

A cylindrical battery tab rubber coating device comprises a conveying line and a rubber coating station, and the rubber coating station comprises a rack, a secondary positioning mechanism, a rubber discharging mechanism and a rubber pasting mechanism, and the secondary positioning mechanism, the rubber discharging mechanism and the rubber pasting mechanism are arranged on the rack. And the equidistant transfer conveying line comprises a plurality of brackets which are arranged at equal intervals. The secondary positioning mechanism comprises a synchronous jacking assembly, a driving wheel and a pair of sensors; the synchronous jacking assembly comprises a pair of positioning wheels. The glue releasing mechanism comprises a glue roll, a guide wheel, a glue releasing clamping jaw, a glue pulling clamping jaw and a glue cutting tool; one end of an adhesive tape on the adhesive roll passes through the guide wheel and then is dragged to the adhesive releasing clamping jaw; the adhesive tape is quantitatively pulled up when the adhesive tape pulling clamping jaw moves upwards; and the rubber cutting tool cuts the pulled-up rubber belt. The adhesive tape pasting mechanism comprises a double-suction-cup adhesive tape folding assembly and an adhesive tape pressing head. The double-suction-cup glue folding assembly comprises a static suction cup and an overturning suction cup, and the overturning suction cup can be overturned and folded relative to the static suction cup. The equipment can adjust the distance from the adhesive tape to the bent root part of the tab, the distance that the adhesive tape exceeds the tab and the width of the adhesive tape, and ensures that important production parameters are accurate and the yield is high.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery cell production, and in particular to a cylindrical battery tab encapsulation device. Background Art

[0002] Please refer to the instruction manual Figure 1 and attached Figure 2 In the production process of cylindrical batteries, the tape wrapping process plays a vital role. By wrapping the tabs 101 on the battery cells 100 with tape, it is ensured that the battery will not have an internal short circuit during the charging and discharging process. At the same time, the tape 102 wrapped on the tabs 101 can also play a role in positioning and buffering, reducing the risk of internal battery failure.

[0003] In the process of wrapping the tab with tape, it is necessary to accurately control three important production parameters: the distance from the tape to the bend root of the tab (C1), the distance of the tape beyond the tab (C2), and the width of the tape (C3). However, the traditional tab wrapping equipment still has the following defects when operating under actual working conditions:

[0004] 1) During the production line, the positioning of the battery cells in the up, down, left, right, front and back directions is inaccurate, the positioning of the circumferential deflection posture of the tabs before encapsulation is inaccurate, and there is a lack of alignment procedures, which results in the inability to accurately adjust the production parameters C1, C2 and C3, resulting in a low pass rate for the encapsulated products;

[0005] 2) There is a lack of shaping process for the tabs before encapsulation. During encapsulation, the tabs are directly encapsulated on the deformed tabs, which may result in bubbles in the tabs after encapsulation, poor encapsulation consistency, and even the production of defective products. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a cylindrical battery tab encapsulation device to overcome the deficiencies in the prior art.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A cylindrical battery tab glue coating device comprises an equidistant transfer conveyor line and a glue coating station, wherein the glue coating station comprises a frame and a primary positioning mechanism, a secondary positioning mechanism, a shaping mechanism, a glue placing mechanism and a glue sticking mechanism arranged on the frame.

[0009] The equidistant transfer conveyor line comprises a plurality of equidistantly arranged brackets, on which the battery cells to be encapsulated are placed transversely, and the tabs on the battery cells are oriented in the same direction.

[0010] The first positioning mechanism includes a pair of centering pressure heads relatively arranged on both sides of the bracket. The centering pressure heads are driven by the centering cylinder to quantitatively extend and retract. When the centering pressure heads are extended, they clamp the battery cells from both ends so that the battery cells are centered in the bracket. The first positioning mechanism performs centering positioning in the front-to-back direction on the battery cells placed flat in the bracket.

[0011] The secondary positioning mechanism comprises a synchronous lifting assembly arranged below the bracket, a driving wheel arranged above the bracket and a pair of sensors arranged to align with the pole lug.

[0012] The synchronous lifting assembly includes a U-shaped pallet, on the inner side of which a pair of positioning wheels are arranged at intervals. When the lifting cylinder drives the U-shaped pallet to rise synchronously, the pair of positioning wheels lift the battery cells placed flat on the bracket from both ends, so that the battery cells are separated from the bracket; the driving wheel is driven by a rotating motor, and the rotation of the driving wheel drives the battery cells on the positioning wheels to rotate circumferentially; a pair of sensors successively obtain the circumferential rotation angle information of the pole ears on the battery cells, and control the rotating motor to control the battery cells to rotate to an angle suitable for the rubber encapsulation, so that the pole ears are in a corrected posture.

[0013] The shaping mechanism is arranged above the pole ear, and the shaping mechanism includes a shaping jaw driven by a shaping cylinder; the shaping cylinder drives the shaping jaw downward and clamps the pole ear in the correction posture, so as to flatten and shape a pole ear that is accidentally deformed during the transmission process, thereby ensuring that no bubbles are generated during the subsequent rubber coating of the pole ear, ensuring the consistency of the rubber coating, and reducing defective products.

[0014] The glue releasing mechanism comprises a glue roll, a plurality of guide wheels, a glue releasing jaw, a glue pulling jaw and a glue cutting tool arranged on one side of a bracket; one end of the tape on the glue roll is guided by the plurality of guide wheels and then pulled to the glue releasing jaw arranged next to the battery cell, the glue releasing jaw clamps the tape and exposes one end of the tape; the glue pulling jaw is driven by a glue pulling cylinder to perform quantitative up and down reciprocating motion, the glue pulling jaw clamps the end of the tape on the glue releasing jaw after descending, and pulls up the tape quantitatively when ascending; the glue cutting tool cuts the pulled up tape into a fixed-length tape for electrode encapsulation.

[0015] The glue sticking mechanism comprises a double suction cup glue folding assembly and a tape pressure head; the double suction cup glue folding assembly comprises a stationary suction cup and a flip suction cup which are arranged side by side and can be independently actuated, the flip suction cup is connected to a gear shaft, the gear meshes with a rack, and the rack is driven by a suction cup cylinder; the suction cup cylinder drives the rack and then drives the gear and the flip suction cup, so that the flip suction cup can be flipped and folded relative to the stationary suction cup.

[0016] Furthermore, the glue sticking mechanism also includes a first displacement slide, which is driven by a first displacement cylinder to achieve displacement of the fixed-length adhesive tape adsorbed on the double suction cup glue folding assembly in the front-to-back direction.

[0017] Furthermore, the glue sticking mechanism also includes a second displacement slide, which is driven by a second displacement cylinder to achieve left-right displacement of the fixed-length adhesive tape adsorbed on the double suction cup glue folding assembly.

[0018] Preferably, the brackets are stepped in sequence at equal intervals, so that the battery cells on the brackets enter the encapsulation station in sequence.

[0019] Preferably, a rubber ring is provided on the circumferential wall of the driving wheel.

[0020] Preferably, the glue releasing process of the glue releasing mechanism and the glue applying process of the glue applying mechanism are performed synchronously without interfering with each other.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1) In this case, a cylindrical battery tab encapsulation equipment can adjust the distance C1 from the tape to the bend root of the tab by adjusting the position of the centering pressure head in the first positioning mechanism, and can adjust the distance C2 of the tape beyond the tab by adjusting the upper limit position of the glue pulling clamp in the glue release mechanism and the height of the glue cutting tool. The tape width C3 can be adjusted by replacing different types of tape rolls and corresponding tape guide wheels, ensuring that important production parameters are accurate and adjustable, and the qualified rate of products after encapsulation is high.

[0023] 2) In this case, a cylindrical battery tab encapsulation equipment is provided with a shaping mechanism, which uses a shaping clamp to flatten and reshape a tab that is accidentally deformed during the transmission process, to ensure that no bubbles are generated during the subsequent encapsulation of the tab, to ensure the consistency of the encapsulation, and to reduce defective products.

[0024] 3) In this case, a cylindrical battery tab encapsulation equipment is used to perform three-dimensional adjustments to the posture of the battery cell in the front, back, left, right, up and down directions through the primary positioning mechanism and the secondary positioning mechanism, ensuring that the battery cell tab is precisely in place before encapsulation, further ensuring the quality of the electrode encapsulation.

[0025] 4) In this case, a cylindrical battery tab encapsulation equipment is used. The glue releasing process of the glue releasing mechanism and the glue sticking process of the glue sticking mechanism are carried out synchronously without interfering with each other. The glue releasing mechanism and the glue sticking mechanism operate simultaneously in dual threads with a compact operation rhythm, which effectively improves the encapsulation efficiency.

[0026] 5) In this case, a cylindrical battery tab encapsulation equipment is used. All linkage functions are centrally controlled by the equipment PLC, and relevant data is uploaded to MES. It has a high degree of automation and precise motion control.

[0027] In order to more clearly understand the present invention, preferred embodiments of the present invention will be described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 , Figure 2It is a schematic diagram of the location of the battery cell tab and the rubber package in the background technology of the present invention;

[0029] Figure 3 It is a schematic diagram of the overall structure of the encapsulation station in the present invention;

[0030] Figure 4 for Figure 3 A magnified view of position A in the middle;

[0031] Figure 5 , Figure 6 for Figure 3 Schematic diagram of the structure at different angles of view at position A in the middle;

[0032] Figure 7 It is a structural schematic diagram of the glue sticking mechanism of the present invention.

[0033] Figure ID:

[0034] 10-centering pressure head; 20-driving wheel, 21-positioning wheel, 22-sensor; 30-shaping jaw; 40-film roll, 41-guide wheel, 42-tape, 43-glue release jaw, 44-glue pulling jaw, 45-glue cutting tool; 51-stationary suction cup, 52-flip suction cup, 53-rack, 54-first displacement slide, 55-second displacement slide, 56-tape pressure head; 100-battery cell in the background technology, 101-ear in the background technology, 102-tape in the background technology; C1-distance from the tape to the root of the bending of the ear, C2-distance from the tape beyond the ear, C3-width of the tape. DETAILED DESCRIPTION

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0036] In addition, if there are terms such as "first" and "second", they are only used for descriptive purposes, mainly to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components, and cannot be understood as indicating or implying relative importance.

[0037] In addition, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Please also see Figure 3-7 The present invention provides a cylindrical battery tab glue coating equipment, including an equidistant transfer conveyor line and a glue coating station, the glue coating station includes a frame and a primary positioning mechanism, a secondary positioning mechanism, a shaping mechanism, a glue placing mechanism and a glue sticking mechanism arranged on the frame.

[0039] The equidistant transfer conveyor line includes a plurality of equidistantly arranged brackets (not shown), on which the battery cells 100 to be encapsulated are placed horizontally, and the tabs 101 are oriented in the same direction; the brackets are stepped at equal intervals in sequence, so that the battery cells 100 on the brackets enter the encapsulation station in sequence.

[0040] The first positioning mechanism includes a pair of centering pressure heads 10 relatively arranged on both sides of the bracket. The centering pressure heads 10 are driven by the centering cylinder to quantitatively extend and retract. When the centering pressure heads 10 are extended, the battery cells 100 are clamped from both ends so that the battery cells 100 are centered in the bracket. The first positioning mechanism performs centering positioning of the battery cells 100 placed flat in the bracket in the front-to-back direction.

[0041] A secondary positioning mechanism, which includes a synchronous lifting assembly arranged below the bracket, a driving wheel 20 arranged above the bracket, and a pair of sensors 22 arranged to align with the pole lug 101;

[0042] The synchronous lifting assembly includes a U-shaped support plate (not shown), and a pair of positioning wheels 21 are arranged at intervals on the inner side of the U-shaped support plate. When the lifting cylinder drives the U-shaped support plate to rise synchronously, the pair of positioning wheels 21 lift the battery cell 100 placed flat on the bracket from both ends, so that the battery cell 100 is separated from the bracket, and the circumferential wall of the lifted battery cell 100 contacts the rubber ring arranged on the circumferential wall of the driving wheel 20; the driving wheel 20 is driven by a rotating motor, and the battery cell 100 on the positioning wheel 21 is driven to rotate circumferentially when the driving wheel 20 rotates; utilizing the eccentric setting of the pole ear 101, a pair of sensors 22 successively obtain the angle information of the pole ear 101 on the battery cell 100 in the circumferential direction, and control the rotating motor to control the battery cell 101 to rotate to an angle suitable for rubber coating, so that the pole ear 101 is in a corrected posture; the secondary positioning mechanism positions the disordered battery cell 100 on the positioning wheel 21 in the up-down direction and the circumferential direction, so that the pole ear 101 is in a corrected posture, which is convenient for the next step of rubber coating.

[0043] The shaping mechanism is arranged above the pole ear 101, and the shaping mechanism includes a shaping jaw 30 driven by a shaping cylinder; the shaping cylinder drives the shaping jaw 30 downward and clamps the pole ear 101 in the correction posture, so as to flatten and shape a pole ear 101 that is accidentally deformed during the transmission process, to ensure that no bubbles are generated during the subsequent rubber coating of the pole ear, to ensure the consistency of the rubber coating, and to reduce defective products.

[0044] The glue releasing mechanism includes a glue roll 40, a plurality of guide wheels 41, a glue releasing jaw 43, a glue pulling jaw 44 and a glue cutting tool 45 arranged on one side of the bracket; one end of the tape 42 on the glue roll 40 is guided by the plurality of guide wheels 41 and then pulled to the glue releasing jaw 43 arranged next to the battery cell 100, the glue releasing jaw 43 clamps the tape 42 and exposes one end of the tape 42; the glue pulling jaw 44 is driven by a glue pulling cylinder to perform quantitative up and down reciprocating motion, the glue pulling jaw 44 clamps the end of the tape 42 on the glue releasing jaw 43 after descending, and quantitatively pulls up the tape 42 when ascending; the glue cutting tool 45 cuts the pulled up tape 42 into a fixed length of tape for coating the electrode, to ensure that the length of the coated tape 42 is consistent.

[0045] The glue sticking mechanism includes a double suction cup glue folding assembly, a first displacement slide 54 , a second displacement slide 55 and a tape pressing head 56 .

[0046] Before the rubber cutting tool 45 cuts the pulled-up adhesive tape 42, the double suction cup adhesive folding assembly absorbs the back side of the fixed-length adhesive tape without adhesive by vacuuming, and then the rubber cutting tool 45 cuts a fixed-length adhesive tape from the adhesive tape 42, and the fixed-length adhesive tape is absorbed on the double suction cup adhesive folding assembly. The double suction cup adhesive folding assembly includes a stationary suction cup 51 and a flip suction cup 52 arranged side by side and capable of independent actuation, the flip suction cup 52 is connected to the gear shaft, the gear meshes with the rack 53, and the rack 53 is driven by the suction cup cylinder; the suction cup cylinder drives the rack 53 and then drives the gear and the flip suction cup 52, so that the flip suction cup 52 can be flipped and folded relative to the stationary suction cup 51.

[0047] The first displacement slide 54 is driven by the first displacement cylinder to achieve displacement of the fixed-length adhesive tape adsorbed on the double suction cup adhesive folding assembly in the front-to-back direction;

[0048] The second displacement slide 55 is driven by the second displacement cylinder to achieve the displacement of the fixed-length adhesive tape adsorbed on the double suction cup adhesive folding assembly in the left and right directions;

[0049] After two displacements, the fixed-length adhesive tape adsorbed on the double suction cup adhesive folding assembly is shifted to the side close to the tab 101, and the adhesive tape pressing head 56 extends to press and adhere the lower half of the fixed-length adhesive tape to one side of the tab 101;

[0050] Subsequently, the suction cup cylinder drives the rack 53, the rack 53 drives the gear, the gear drives the flip suction cup 52, the flip suction cup 52 drives the upper half of the fixed-length tape to flip and fold in half, and then the tape pressing head 56 presses the upper half of the fixed-length tape tightly and sticks it to the other side of the pole ear 101, thereby completing the glue coating process of the pole ear 101; and, the length of the cut fixed-length tape is sufficient to allow both ends of the glue-coated fixed-length tape to exceed the pole ear by a certain distance, that is, the distance C2 beyond the pole ear, so that the two ends of the fixed-length tape are also adhered to each other, thereby ensuring the reliability of the electrode glue coating.

[0051] It should be noted that, in the present embodiment, the glue releasing process of the glue releasing mechanism and the glue sticking process of the glue sticking mechanism are carried out synchronously without interfering with each other. Specifically, after the last glue releasing is completed, the fixed-length adhesive tape is adsorbed by the double suction cup glue folding assembly and is ready to be glued to the ear, and the next glue releasing action is also started synchronously, so that the glue releasing mechanism and the glue sticking mechanism operate simultaneously like dual threads, with a compact operation rhythm, which effectively improves the glue wrapping efficiency.

[0052] At the same time, it should be noted that in the process of using this encapsulation equipment to encapsulate the battery cell tabs,

[0053] A. One of the important production parameters is the distance C1 from the tape to the bend root of the tab, which can be adjusted by adjusting the position of the centering pressure head 10 in the first positioning mechanism;

[0054] B. The second important parameter size of production is the distance C2 of the tape beyond the tab, which can be adjusted by adjusting the upper limit position of the glue pulling jaw 44 in the glue releasing mechanism and the height of the glue cutting tool 45;

[0055] C. The third important parameter dimension of production is the tape width C3, which can be adjusted by replacing different types of film rolls 40 and corresponding tape 42 guide wheels 41.

[0056] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A cylindrical battery tab glue coating equipment, comprising an equidistant transfer conveyor line and a glue coating station, wherein the glue coating station comprises a frame and a secondary positioning mechanism, a glue placing mechanism and a glue sticking mechanism arranged on the frame, characterized in that: The equidistant transfer conveyor line comprises a plurality of equidistantly arranged brackets, on which the battery cells (100) to be encapsulated are placed transversely, and the tabs (101) on the battery cells (100) are oriented in the same direction; The secondary positioning mechanism comprises a synchronous lifting assembly arranged below the bracket, a driving wheel (20) arranged above the bracket, and a pair of sensors (22) arranged to align with the pole lug (101); The synchronous lifting assembly comprises a U-shaped support plate, and a pair of positioning wheels (21) are arranged at intervals on the inner side of the U-shaped support plate. When the lifting cylinder drives the U-shaped support plate to rise synchronously, the pair of positioning wheels (21) lift the battery cell (100) placed flat on the bracket from both ends, so that the battery cell (100) is separated from the bracket; the driving wheel (20) is driven by a rotating motor, and when the driving wheel (20) rotates, the battery cell (100) on the positioning wheel (21) is driven to rotate in the circumferential direction; a pair of sensors (22) successively obtain the angle information of the circumferential rotation of the pole ear (101) on the battery cell (100), and control the rotating motor to control the battery cell (100) to rotate to an angle suitable for rubber encapsulation, so that the pole ear (101) is in a correction posture; The glue releasing mechanism comprises a glue roll (40) arranged on one side of the bracket, a plurality of guide wheels (41), a glue releasing clamp (43), a glue pulling clamp (44) and a glue cutting tool (45); one end of the adhesive tape (42) on the glue roll (40) is guided by the plurality of guide wheels (41) and then pulled onto the glue releasing clamp (43) arranged next to the battery cell (100); the glue releasing clamp (43) clamps the adhesive tape (42) and exposes one end of the adhesive tape (42); the glue pulling clamp (44) is driven by a glue pulling cylinder to perform quantitative up and down reciprocating motion; the glue pulling clamp (44) clamps the end of the adhesive tape (42) on the glue releasing clamp (43) after descending, and quantitatively pulls up the adhesive tape (42) when ascending; the glue cutting tool (45) cuts the pulled up adhesive tape (42) into a fixed length of adhesive tape for electrode glue coating; The glue sticking mechanism comprises a double suction cup glue folding assembly and a tape pressing head (56); the double suction cup glue folding assembly comprises a stationary suction cup (51) and a flip suction cup (52) which are arranged side by side and can be independently actuated; the flip suction cup (52) is connected to a gear shaft, the gear is meshed with a rack (53), and the rack (53) is driven by a suction cup cylinder; the suction cup cylinder drives the rack (53) and further drives the gear and the flip suction cup (52), so that the flip suction cup (52) can be flipped and folded relative to the stationary suction cup (51).

2. The cylindrical battery tab encapsulation equipment according to claim 1, characterized in that: The glue sticking mechanism also includes a first displacement slide (54), which is driven by a first displacement cylinder to achieve displacement in the front-to-back direction of the fixed-length adhesive tape adsorbed on the double suction cup adhesive folding assembly.

3. The cylindrical battery tab encapsulation equipment according to claim 2, characterized in that: The glue sticking mechanism also includes a second displacement slide (55), which is driven by a second displacement cylinder to achieve displacement in the left-right direction of the fixed-length adhesive tape adsorbed on the double suction cup adhesive folding assembly.

4. The cylindrical battery tab encapsulation equipment according to claim 3, characterized in that: The device also includes a first positioning mechanism, which includes a pair of centering pressure heads (10) arranged relatively on both sides of the bracket. The centering pressure heads (10) are driven by a centering cylinder to quantitatively extend and retract. When the centering pressure heads (10) are extended, they clamp the battery cell (100) from both ends, so that the battery cell (100) is centered in the bracket.

5. The cylindrical battery tab encapsulation equipment according to claim 4, characterized in that: It also includes a shaping mechanism, which is arranged above the pole lug (101), and includes a shaping clamping jaw (30) driven by a shaping cylinder; the shaping cylinder drives the shaping clamping jaw (30) to move downward and clamp the pole lug (101) in a correction posture.

6. The cylindrical battery tab encapsulation equipment according to claim 1, characterized in that: The brackets are stepped in sequence at equal intervals, so that the battery cells (100) on the brackets enter the encapsulation station in sequence.

7. The cylindrical battery tab encapsulation equipment according to claim 1, characterized in that: A rubber ring is arranged on the circumferential wall of the driving wheel (20).

8. The cylindrical battery tab encapsulation equipment according to claim 1, characterized in that: The glue placing process of the glue placing mechanism and the glue sticking process of the glue sticking mechanism are performed synchronously without interfering with each other.

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