A continuous multi-station battery core winding device

Abstract

The present invention discloses a continuous multi-station battery cell winding device, comprising a rotor, on which a plurality of needle cylinder assemblies are evenly distributed along its circumference, and any needle cylinder assembly is correspondingly provided with an elastic material pressing assembly; any needle cylinder assembly is connected with a rotating drive assembly for driving its rotation, and the needle cylinder assembly comprises a guide cylinder, in which two winding needles are slidably installed along its length direction, and a gap is provided between the two winding needles for the strip to pass through; a cylindrical cylinder is also coaxially sleeved on the outer side surface of the rotor, and a plurality of lifting drive assemblies are provided on the outer side surface of the cylindrical cylinder for driving the winding needles to slide along the guide cylinder, and the lifting drive assembly is installed on the rotor; a material pressing and cutting assembly is also provided on the outer side surface of the rotor for pressing and cutting the strip, and the material pressing and cutting assembly is installed at the driving end of a reciprocating rotating drive assembly, and the material pressing and cutting assembly reciprocates along the rotation direction of the rotor. The technical scheme of the present invention improves the working stability of the battery cell winding device and increases the production capacity.

Description

Technical Field

[0001] The invention relates to the field of lithium battery processing, and in particular to a continuous multi-station battery core winding device. Background Art

[0002] Cell winding is an essential and important process for most lithium battery manufacturing. The cell winding machines on the market are basically designed and manufactured with reference to foreign winding machines. There is a common feature in the core making process: cells can only be rolled individually (the core winding process: 1. Feeding the cell, 2. Changing the station to cut the diaphragm and glue the end, 3. Pulling the winding needle to take the material). The longest step in the process plus the time for changing the station is the production cycle, and the current high requirements and subdivision of the single step time have reached a bottleneck. In view of the current fierce product competition, compressed production costs, and high production efficiency, the existing cell winding devices can no longer meet the market's requirements for high production capacity and high cost performance. Summary of the invention

[0003] The main purpose of the present invention is to provide a continuous multi-station battery cell winding device, aiming to improve the working stability of the battery cell winding device and increase the production capacity.

[0004] To achieve the above-mentioned purpose, the present invention proposes a continuous multi-station battery cell winding device, comprising a rotor, on which a plurality of needle cylinder assemblies for strip winding are evenly distributed along its circumference, and any of the needle cylinder assemblies is correspondingly provided with an elastic pressing assembly for pressing the strip onto the needle cylinder assembly; any of the needle cylinder assemblies is connected to a rotating drive assembly for driving its rotation, and the needle cylinder assembly comprises a guide cylinder, in which two winding needles are slidably installed along its length direction, and a gap is provided between the two winding needles for the strip to pass through; a cylindrical cylinder is also coaxially sleeved on the outer side surface of the rotor, and the outer side surface of the cylindrical cylinder A plurality of lifting drive assemblies are provided for driving the winding needle to slide along the guide cylinder. The lifting drive assemblies are installed on the rotor, and any of the lifting drive assemblies includes a first lifting rod and a second lifting rod respectively connected to the two winding needles, and rollers are respectively installed on the first lifting rod and the second lifting rod, and the outer side surface of the guide cylinder is provided with guide grooves for the two rollers to move respectively; the outer side surface of the rotor is also provided with a pressing and cutting assembly for pressing and cutting the strip material, and the pressing and cutting assembly is installed on the driving end of a reciprocating rotating drive assembly, and the pressing and cutting assembly reciprocates along the rotation direction of the rotor.

[0005] Preferably, a material guide assembly is provided between two adjacent syringe assemblies, and any of the material guide assemblies comprises two guide rollers installed side by side along the rotation direction of the rotor, and a conveyor belt is provided on the outer side surfaces of the two guide rollers for transmission connection.

[0006] Preferably, the elastic pressing assembly includes a pressing roller arranged side by side with the winding needle, both ends of the pressing roller are respectively fixed on a connecting arm, any of the connecting arms is hinged on a fixed block, and the connecting arm and the fixed block are abutted by a spring.

[0007] Preferably, the rotary drive assembly comprises a first drive motor, a drive end of the drive motor is coaxially connected to a drive gear, and the syringe assembly is provided with a driven gear meshing with the drive gear.

[0008] Preferably, any of the lifting drive assemblies further comprises two first guide rail slider mechanisms, and one end of the first lifting rod and one end of the second lifting rod are respectively connected to the rotor through the first guide rail slider mechanisms.

[0009] Preferably, the reciprocating rotation drive mechanism is configured as a crank rocker drive mechanism, which includes a driving wheel, which is mounted on the driving end of a second drive motor, the side surface of the driving wheel is hinged to the end of a connecting rod, and the other end of the connecting rod is hinged to a second guide rail slider mechanism, the second guide rail slider mechanism is meshed with the outer side surface of a driven wheel through a rack structure, the driven wheel is sleeved on the outer side surface of the rotor, and the pressing and cutting assembly is mounted on the driven wheel.

[0010] Preferably, the pressing and cutting assembly includes a first driving cylinder, a first pressing block is installed on the driving end of the first driving cylinder, a plurality of second pressing blocks corresponding to the first pressing blocks are installed on the rotor, a second driving cylinder is also installed on the driving end of the first driving cylinder, a cutter is installed on the driving end of the second driving cylinder, and the first pressing block and the second pressing block are provided with through holes for the cutter to pass through.

[0011] Preferably, it also includes a feeding assembly, which includes a feeding motor, a feeding roller is coaxially mounted on the driving end of the feeding motor, and also includes a plurality of feeding guide rollers, and the feeding rollers are connected to each other through a conveyor belt.

[0012] Compared with the prior art, the invention has the following beneficial effects: it realizes multi-station battery core winding, saves station change time, and continuously completes feeding, winding and cutting while the rotor rotates, greatly improving production efficiency. The rotor does not need to be accelerated or decelerated suddenly, so the overall processing process is stable. At the same time, the guide groove of the cylindrical barrel adopts an improved trapezoidal curve, which has a small working impact, ensures the stability of the winding needle lifting and lowering, reduces noise, and saves space. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the battery core winding device of the present invention;

[0015] Figure 2 A top view of the battery cell winding device of the present invention;

[0016] Figure 3 It is a schematic diagram of the installation structure between the syringe assembly, the elastic material pressing assembly, the rotation drive assembly, and the lifting drive assembly of the present invention;

[0017] Figure 4 This is a schematic diagram of the structure of the elastic material pressing component of the present invention;

[0018] Figure 5 It is a schematic diagram of the cylindrical tube structure of the present invention;

[0019] Figure 6 It is a structural schematic diagram of the material pressing and cutting assembly of the present invention;

[0020] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] This embodiment proposes a continuous multi-station battery cell winding device, referring to Figures 1 to 5, including a rotor 1, on which a plurality of needle cylinder assemblies 3 for winding the strip 2 are evenly distributed along its circumference, and any of the needle cylinder assemblies 3 is correspondingly provided with an elastic material pressing assembly 4 for pressing the strip 2 onto the needle cylinder assembly 3; any of the needle cylinder assemblies 3 is connected to a rotating drive assembly 5 for driving its rotation, and the needle cylinder assembly 3 includes a guide cylinder 31, in which two winding needles 32 are slidably installed along the length direction thereof, and a gap is provided between the two winding needles 32 for the strip 2 to pass through; a cylindrical cylinder 6 is also coaxially sleeved on the outer side of the rotor 1, and a plurality of elastic material pressing assembly 4 for driving the winding needle 32 along the guide cylinder is provided on the outer side of the cylindrical cylinder 6 31 sliding lifting drive assembly 7, the lifting drive assembly 7 is installed on the rotor 1, and any of the lifting drive assemblies 7 includes a first lifting rod 71 and a second lifting rod 72 respectively connected to the two winding needles 32, the first lifting rod 71 and the second lifting rod 72 are respectively installed with rollers 73, and the outer side of the guide cylinder 31 is provided with a guide groove 61 for the two rollers 73 to move respectively; the outer side of the rotor 1 is also provided with a pressing and cutting assembly 8 for pressing and cutting the strip 2, the pressing and cutting assembly 8 is installed at the driving end of a reciprocating rotating driving assembly 95, and the pressing and cutting assembly 8 reciprocates along the rotation direction of the rotor 1. It also includes a feeding assembly 11, the feeding assembly 11 includes a feeding motor 111, a feeding roller 112 is coaxially installed at the driving end of the feeding motor 111, and also includes a plurality of feeding guide rollers 113, and the feeding rollers 112 and the feeding guide rollers 113 are connected by a guide conveyor belt 114.

[0022] Furthermore, a material belt guide assembly 10 is arranged between two adjacent syringe assemblies 3, and any of the material belt guide assemblies 10 includes two guide rollers 101 installed side by side along the rotation direction of the rotor 1, and a guide conveyor belt 102 is provided on the outer side of the two guide rollers 101 for transmission connection to ensure the stability of the movement of the material belt 2.

[0023] Furthermore, the elastic pressing assembly 4 includes a pressing roller 41 arranged side by side with the winding needle 32, and both ends of the pressing roller 41 are respectively fixed on a connecting arm 42, and any of the connecting arms 42 is hinged on a fixed block 43, and the connecting arm 42 and the fixed block 43 are abutted by a spring (not shown in the figure).

[0024] Furthermore, the rotary drive assembly 5 includes a first drive motor 51, the drive end of the drive motor is coaxially connected to a drive gear 52, and the syringe assembly 3 is provided with a driven gear 33 meshing with the drive gear 52 to ensure the rotation stability of the syringe assembly 3 when rolling the material.

[0025] Furthermore, any of the lifting drive assemblies 7 also includes two first guide rail slider mechanisms 74, and one end of the first lifting rod 71 and the second lifting rod 72 are respectively connected to the rotor 1 through the first guide rail slider mechanisms 74 to ensure the stability of the lifting and lowering of the winding needle 32.

[0026] Furthermore, the reciprocating rotation drive mechanism is configured as a crank rocker drive mechanism, which includes a driving wheel 91, which is mounted on the driving end of a second drive motor 92, and the side of the driving wheel 91 is hinged to the end of a connecting rod 93, and the other end of the connecting rod 93 is hinged to a second guide rail slider mechanism 94, and the second guide rail slider mechanism 94 is meshed with the outer side of a driven wheel 95 through a rack structure, and the driven wheel 95 is sleeved on the outer side of the rotor 1, and the pressing and cutting assembly 8 is installed on the driven wheel 95.

[0027] Further, refer to Figure 6 The pressing and cutting assembly 8 includes a first driving cylinder 81, a first pressing block 82 is installed at the driving end of the first driving cylinder 81, a plurality of second pressing blocks (not shown in the figure) corresponding to the first pressing blocks 82 are installed on the rotor 1, a second driving cylinder 84 is also installed at the driving end of the first driving cylinder 81, a cutter 85 is installed at the driving end of the second driving cylinder 84, and the first pressing block 82 and the second pressing block are provided with through holes (not shown in the figure) for the cutter 85 to pass through.

[0028] Specifically, before winding the battery cell, the rollers 73 on the first lifting rod 71 and the second lifting rod 72 are respectively located at the farthest points of the two guide grooves 61 of the cylindrical tube 6. Therefore, of the two winding needles 32 connected to the first lifting rod 71 and the second lifting rod 72, one winding needle 32 extends out of the guide tube 31, and the other winding needle 32 is retracted in the guide tube 31.

[0029] When winding the battery cell, the staff feeds the strip 2 into the rotor 1 through the feeding assembly 11, and places the end of the strip 2 on the surface of the second pressing block after passing through the side of an extended winding needle 32. The first driving cylinder 81 drives the first pressing block 82 to press against the second pressing block to press the end of the strip 2 to complete the feeding. At this time, the battery cell winding device is started, the rotor 1 starts to rotate, the needle assembly 3 and the reciprocating rotation drive assembly 95 start to rotate, wherein the needle assembly 3 and the reciprocating rotation drive assembly 95 rotate in the same direction, and at the same time, the needle assembly 3 rotates in the opposite direction. It should be noted that when the rotor 1 rotates, the lifting drive assembly 7 installed on the rotor 1 rotates simultaneously with the rotor 1, so that the first lifting rod 71 and the second lifting rod 72 move under the guidance of the guide groove 61 through the rollers 73 thereon. Since the two guide grooves 61 of the cylindrical tube 6 adopt an improved trapezoidal curve design and the two guide grooves 61 are opened in opposite directions, the higher roller 73 maintains the same height and moves along the guide groove 61, and the lower roller 73 moves toward the direction of the higher roller 73, so that when in the initial position, the winding needle 32 in the guide tube 31 is extended, so that the strip 2 is clamped between the two winding needles 32.

[0030] When the reciprocating drive assembly 95 and the needle assembly 3 in the initial position rotate to the next station, the strip 2 on the winding needle 32 completes the winding of a battery cell. At this time, the outer diameter of the winding needle 32 increases due to the winding of the strip 2, and just abuts against the pressing roller 41 of the elastic pressing assembly 4. The spring in the elastic pressing assembly 4 is compressed, and the strip 2 is pressed against the winding needle 32. At this time, the first driving cylinder 81 drives the first pressing block 82 to retract, and the reciprocating drive assembly 95 rotates in the opposite direction to return to the initial position. During this process, the rotor 1 continues to rotate, and the next needle assembly 3 rotates to the initial feeding position, and corresponds to the reciprocating drive assembly 95 that returns to the initial position. The reciprocating drive assembly presses the material again through the first driving cylinder 81, and drives the cutter 85 to press down to cut the material through the second driving cylinder 84, completing the feeding, winding and cutting of a battery cell. By repeating the above process, multi-station continuous battery cell winding operation can be realized. It should be noted that after the cutter 85 cuts the material, the strip material 2 of the next needle cylinder assembly 3 continues to be pressed between the first pressing block 82 and the second pressing block, and the tail material after the previous winding can be recovered under the self-rotation of the needle cylinder assembly 3 due to the rotational contact between the winding needle 32 and the pressing roller 41 of the elastic pressing assembly 4, and then glued through the subsequent process and taken out by the robot. Gluing and taking out by the robot are not the main inventive points of this embodiment and will not be described in detail here.

[0031] This embodiment realizes multi-station cell winding, saves station change time, and continuously completes feeding, winding, and cutting while the rotor 1 rotates, greatly improving production efficiency. The rotor 1 does not need to be accelerated or decelerated suddenly, so the overall processing process is stable. At the same time, the guide groove 61 of the cylindrical barrel 6 adopts an improved trapezoidal curve, which has a small working impact, ensures the stability of the lifting and lowering of the winding needle 32, reduces noise, and saves space.

[0032] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A continuous multi-station battery cell winding device, characterized in that: The invention comprises a rotor, on which a plurality of needle cylinder assemblies for winding the strip are evenly distributed along its circumference, and any of the needle cylinder assemblies is correspondingly provided with an elastic material pressing assembly for pressing the strip onto the needle cylinder assembly; any of the needle cylinder assemblies is connected with a rotating driving assembly for driving its rotation, and the needle cylinder assembly comprises a guide cylinder, in which two winding needles are slidably installed along its length direction, and a gap is provided between the two winding needles for the strip to pass through; a cylindrical cylinder is also coaxially sleeved on the outer side surface of the rotor, and a plurality of elastic material pressing assembly is provided on the outer side surface of the cylindrical cylinder for driving the winding needle to rotate along the guide cylinder, A lifting drive assembly for sliding the guide cylinder, the lifting drive assembly is installed on the rotor, and any of the lifting drive assemblies includes a first lifting rod and a second lifting rod respectively connected to the two winding needles, rollers are respectively installed on the first lifting rod and the second lifting rod, and the outer side of the guide cylinder is provided with a guide groove for the two rollers to move respectively; the outer side of the rotor is also provided with a pressing and cutting assembly for pressing and cutting the strip material, the pressing and cutting assembly is installed on the driving end of a reciprocating rotating drive assembly, and the pressing and cutting assembly reciprocates along the rotation direction of the rotor; A material guide assembly is arranged between two adjacent needle cylinder assemblies, and any of the material guide assemblies comprises two guide rollers installed side by side along the rotation direction of the rotor, and a conveyor belt is arranged on the outer side of the two guide rollers for transmission connection; The elastic material pressing assembly comprises a material pressing roller arranged side by side with the winding needle, the two ends of the material pressing roller are respectively fixed on a connecting arm, any of the connecting arms is hinged on a fixed block, and the connecting arm and the fixed block are abutted by a spring; The rotary drive assembly comprises a first drive motor, the drive end of the drive motor is coaxially connected to a drive gear, and the syringe assembly is provided with a driven gear meshing with the drive gear; Any of the lifting drive assemblies further comprises two first guide rail slider mechanisms, and one end of the first lifting rod and the second lifting rod are respectively connected to the rotor through the first guide rail slider mechanisms; The reciprocating rotation drive mechanism is configured as a crank rocker drive mechanism, the crank rocker drive mechanism comprising a driving wheel, the driving wheel is mounted on the driving end of a second driving motor, the side surface of the driving wheel is hinged to the end of a connecting rod, the other end of the connecting rod is hinged to a second guide rail slider mechanism, the second guide rail slider mechanism is meshed with the outer side surface of a driven wheel through a rack structure, the driven wheel is sleeved on the outer side surface of the rotor, and the pressing and cutting assembly is mounted on the driven wheel; The material pressing and cutting assembly comprises a first driving cylinder, a first material pressing block is installed at the driving end of the first driving cylinder, a plurality of second material pressing blocks corresponding to the first material pressing blocks are installed on the rotor, a second driving cylinder is also installed at the driving end of the first driving cylinder, a cutting knife is installed at the driving end of the second driving cylinder, and through holes for the cutting knife to pass through are opened on the first material pressing block and the second material pressing block; It also includes a feeding assembly, which includes a feeding motor, a feeding roller is coaxially mounted on the driving end of the feeding motor, and a plurality of feeding guide rollers, and the feeding rollers are connected to each other through a conveyor belt.

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