CN112582630B - Cylindrical battery cell processing equipment - Google Patents

Cylindrical battery cell processing equipment Download PDF

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Publication number
CN112582630B
CN112582630B CN202011440799.8A CN202011440799A CN112582630B CN 112582630 B CN112582630 B CN 112582630B CN 202011440799 A CN202011440799 A CN 202011440799A CN 112582630 B CN112582630 B CN 112582630B
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China
Prior art keywords
plunger
battery cell
cylindrical
tab
bending
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CN202011440799.8A
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Chinese (zh)
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CN112582630A (en
Inventor
陈良华
张艺永
黄英顺
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Zhuhai Ruixiang Intelligent Technology Co ltd
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Zhuhai Ruixiang Intelligent Technology Co ltd
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Publication of CN112582630A publication Critical patent/CN112582630A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/005—Devices for making primary cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/003—Positioning devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H01M10/0409—Machines for assembling batteries for cells with wound electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0422—Cells or battery with cylindrical casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to a cylindrical battery cell processing device which comprises a tab correction bending module, a battery cell balance manipulator and a blanking platform, wherein the tab correction bending module is arranged on the battery cell balance manipulator; the tab correction bending module comprises a cell bearing assembly, a cell axial limiting assembly, a cell radial limiting assembly, an inner tab bending assembly and an inner tab position detection assembly; the battery cell bearing assembly comprises a first rotating shaft roller and a second rotating shaft roller which are arranged side by side, and the first rotating shaft roller is driven by a motor to rotate; the inner pole ear position detection assembly comprises a first photoelectric sensor and a second photoelectric sensor which are arranged up and down, the first photoelectric sensor is provided with a first signal transmission path which is horizontally arranged, the second photoelectric sensor is provided with a second signal transmission path which is horizontally arranged, and the first signal transmission path and the second signal transmission path are both located below the preset bending position of the inner pole ear. The cylindrical battery cell processing equipment can efficiently and high-quality bend the inner pole lug.

Description

Cylindrical battery cell processing equipment
Technical Field
The invention relates to a cylindrical battery cell processing device.
Background
The manufacturing and processing of the cylindrical battery cell generally comprises a battery cell winding process and a bending process for bending the battery cell inner pole ear after winding. Fig. 1a and 1b show an example structure of a cylindrical battery cell after winding and before bending, and the cylindrical battery cell 200 after winding comprises a main body part 201 with a core hole 202, an outer tab 203 and an inner tab 204. Wherein, the outer tab 203 is located at one axial end of the main body part 201 and is located at the periphery of the main body part 201; the inner tab 204 is located at the other axial end of the body portion 201 and located on the inner periphery of the body portion 201.
Through the bending process, the inner pole ear is bent by 90 degrees and at least partially covers the core hole. For the inner tab bending process, on one hand, the position of the inner tab during bending needs to be accurately corrected and determined, so that the bending defect caused by the position offset of the inner tab (for example, the connection part of the inner tab and the main body part of the battery cell is partially or completely broken) is avoided, and the bending quality of the inner tab is ensured; on the other hand, it is desirable to efficiently bend the inner tab.
Disclosure of Invention
The invention mainly aims to provide cylindrical battery cell processing equipment capable of realizing bending of an inner pole lug with high efficiency and high quality.
In order to achieve the main object, an embodiment of the present invention provides a cylindrical battery cell processing apparatus, which includes a tab correction bending module, a battery cell wobble plate manipulator and a blanking platform, where the battery cell wobble plate manipulator is used to transfer a cylindrical battery cell from the tab correction bending module to the blanking platform; wherein, the utmost point ear is rectified and is bent the module and includes:
the battery cell bearing assembly is used for bearing a cylindrical battery cell; the battery cell bearing assembly comprises a first rotating shaft roller and a second rotating shaft roller which are arranged side by side, and the first rotating shaft roller is driven by a motor to rotate;
the battery cell axial limiting assembly is used for axially limiting the cylindrical battery cell;
the battery cell radial limiting assembly is used for radially limiting the cylindrical battery cell;
the inner tab bending assembly is used for bending the inner tab of the cylindrical battery cell from top to bottom;
the inner tab position detection assembly is used for detecting the position of the inner tab; the inner pole ear position detection assembly comprises a first photoelectric sensor and a second photoelectric sensor which are arranged up and down, the first photoelectric sensor is provided with a first signal transmission path which is horizontally arranged, the second photoelectric sensor is provided with a second signal transmission path which is horizontally arranged, and the first signal transmission path and the second signal transmission path are both located below the preset bending position of the inner pole ear.
In the embodiment of the invention, the battery cell bearing assembly comprises the first rotating shaft roller and the second rotating shaft roller which are arranged side by side, and the rotary battery cell bearing structure has the advantages of convenience and quickness in battery cell taking and placing and tab position adjustment, is also convenient for bending the inner tab from top to bottom, and is beneficial to realizing high-efficiency bending operation of the inner tab; furthermore, the bending position of the inner lug can be accurately corrected and detected through mutual matching of the axial battery cell limiting assembly, the radial battery cell limiting assembly and the position detecting assembly of the inner lug, and the bending quality is improved.
Further, the first photosensor and the second photosensor are both correlation type photosensors. Wherein, correlation type photoelectric sensor has the advantage that the volume is less, can detect the position of interior utmost point ear more accurately.
Further, the first signal transmission path and the second signal transmission path are symmetrical up and down with respect to the central axis of the cylindrical battery core.
Further, the spacing between the first photosensor and the second photosensor is set such that: and at a certain moment or time period before the inner pole lug rotates to a preset bending position from bottom to top, the inner pole lug is positioned on the first signal transmission path and the second signal transmission path simultaneously.
According to a specific embodiment of the invention, the inner tab bending assembly comprises a movable support and a bending head; the movable support is arranged to be capable of lifting and moving and capable of translating in the direction parallel to the roller axis of the first rotating shaft; the bending head is arranged on the movable support and used for pressing the inner pole lug from top to bottom.
According to a specific embodiment of the present invention, the axial limiting assembly includes a first axial positioning end and a second axial positioning end which are oppositely disposed, wherein the first axial positioning end and the second axial positioning end are disposed to be capable of performing a translational motion in a direction parallel to the axis of the first rotating shaft roller, so as to be capable of approaching or departing from each other in the axial direction of the cylindrical battery core.
According to a specific embodiment of the present invention, the radial position-limiting assembly includes a position-limiting bracket and a position-limiting roller; the movable support is arranged to be capable of lifting and moving and capable of translating in the direction parallel to the roller axis of the first rotating shaft; the limiting idler wheel is rotatably arranged on the limiting support and used for supporting and pressing the cylindrical battery cell from the upper side.
Further, spacing support includes articulated horizontal arm and vertical arm each other, the horizontal arm with be connected with the spring between the vertical arm, spacing gyro wheel sets up on the horizontal arm. The spring makes the spacing gyro wheel form elastic contact with cylindrical electric core between to alleviate or avoid spacing gyro wheel to cause the damage to cylindrical electric core.
According to a specific embodiment of the present invention, the tab correction bending module further includes a third photoelectric sensor for detecting a position of a tab outside the cylindrical cell.
The cylindrical battery cell processing equipment of the embodiment of the invention may further include:
the battery cell clamping and positioning mechanism is used for clamping and positioning the cylindrical battery cell to be plugged;
the battery cell loading and unloading manipulator is used for moving the cylindrical battery cell into the battery cell clamping and positioning mechanism and transferring the cylindrical battery cell from the battery cell clamping and positioning mechanism to the battery cell bearing assembly of the tab correction bending module;
the plunger piston feeding mechanism is used for automatically feeding the plunger piston to the plunger piston transfer mechanism;
a plunger transfer mechanism including a rotary table and a plurality of transfer portions provided around a rotation axis of the rotary table, the transfer portions having transfer holes into which plungers supplied from the plunger feeding mechanism are partially inserted;
a plunger precession mechanism comprising a gripper head movable between a gripping position and a precession position; the clamping head clamps the plunger in the transfer hole at the clamping position and rotatably inserts the plunger into the core hole of the cylindrical battery core at the screwing-in position;
the plunger feeding mechanism and the plunger screwing-in mechanism are arranged on two opposite sides of the plunger transfer mechanism.
According to the technical scheme, the cylindrical battery cell processing equipment provided by the embodiment of the invention can automatically insert the plunger into the core hole of the cylindrical battery cell before the inner pole ear is bent, and the plunger is favorable for avoiding the deformation of the core hole or the damage to the diaphragm when the inner pole ear is bent.
According to a specific embodiment of the present invention, the plunger loading mechanism includes:
the plunger supply mechanism is used for conveying the plunger to a plunger temporary storage groove;
and the plunger abutting assembly is used for abutting the plunger in the plunger temporary storage groove into the transfer hole.
Further, the plunger abutting assembly comprises:
a plunger conveying block having a conveying through hole; the plunger conveying block is arranged to move between the first plunger abutting device and the second plunger abutting device;
the first plunger abutting device is provided with a telescopic first ejector rod; when the plunger conveying block moves to the conveying through hole and aligns to the plunger temporary storage groove, the first ejector rod pushes the plunger in the plunger temporary storage groove into the conveying through hole;
the second plunger abutting device is provided with a telescopic second ejector rod; when the plunger conveying block moves to the conveying through hole and aligns to the transfer hole, the second ejector rod enables the plunger in the conveying through hole to be abutted to the transfer hole.
Further, the plunger feeding mechanism comprises a plunger storage hopper, a plunger conveying groove, a bearing step with the height gradually increased in a multi-stage mode, and a lifting step with the height gradually increased in a multi-stage mode; the bearing steps are fixedly arranged in the plunger piston conveying groove, and the lifting steps are arranged between the adjacent bearing steps; the lifting step can perform lifting motion and is used for realizing the step-by-step conveying of the plunger on the multi-stage bearing step.
In a preferred embodiment of the present invention, the plunger for insertion into the core hole may have a stepped structure in which the plunger includes a large cylindrical portion and a small cylindrical portion. For this reason, it is necessary to control the orientation of the plunger of the stepped structure when it is transferred to the plunger relay mechanism.
As a specific embodiment for controlling the plunger conveying direction, plunger falling grooves are arranged beside the plunger conveying grooves side by side and used for guiding plungers with wrong directions back to the plunger storage hopper; the top ends of the bearing steps and the lifting steps form a step surface matched with the plunger in shape, the step surface comprises an upper surface and a lower surface, one side of the upper surface of at least one bearing step and/or at least one lifting step is provided with an inclined surface, the inclined surface inclines towards one side of the plunger falling groove, and the plunger conveyed in the wrong direction can slide into the plunger falling groove along the inclined surface.
Further, a plunger lifting plate which can be lifted and descended is arranged in the plunger storage hopper and used for lifting the plunger to the lowest bearing step in the multi-stage bearing steps.
To more clearly illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Drawings
Fig. 1a is a perspective view of an example of a cylindrical cell after winding;
fig. 1b is a side view of an example of a cylindrical cell after winding;
FIG. 2 is a schematic structural view of an example of a plunger;
fig. 3 is a top view of an embodiment of the cylindrical cell processing apparatus of the present invention;
fig. 4 is a perspective view of the overall structure of the embodiment of the cylindrical cell processing apparatus of the present invention;
fig. 5 is a perspective view of a partial structure of an embodiment of the cylindrical cell processing apparatus of the present invention;
FIG. 6 is a perspective view of a first embodiment of a plunger loading mechanism of the present invention;
FIG. 7 is a front view of a first embodiment of a plunger loading mechanism of the present invention;
FIG. 8 is a perspective view of a first embodiment of the plunger feed mechanism of the present invention;
FIG. 9 is a partial left side view of the first embodiment of the plunger loading mechanism of the present invention;
FIG. 10 is a schematic view of the first embodiment of the plunger feed mechanism with the delivery plunger properly oriented;
FIG. 11a is a schematic view of the first embodiment of the plunger feed mechanism with the plunger delivered in the wrong orientation;
FIG. 11b is a schematic view of the plunger feed mechanism in the first embodiment, with the wrong direction plunger pushed against the plunger-retraction slot;
FIG. 12 is a perspective view of a second embodiment of a plunger loading mechanism of the present invention;
FIG. 13 is a left side elevational view of a second embodiment of the plunger loading mechanism of the present invention;
FIG. 14 is an enlarged partial view of a second embodiment of a plunger loading mechanism of the present invention;
fig. 15 is a perspective view of an embodiment of a cell clamping and positioning mechanism;
fig. 16 is a perspective view of an embodiment of a tab correction bending module of the present invention;
fig. 17 is a schematic diagram of the detection of the bending position of the inner tab according to the present invention.
Detailed Description
The manufacturing and processing of the cylindrical battery cell generally comprises a battery cell winding procedure and a bending procedure for bending the inner electrode lug of the battery cell after winding, a plunger piston can be inserted into a core hole of the battery cell before the inner electrode lug is bent, and the plunger piston is favorable for avoiding the deformation of the core hole or the damage to a diaphragm when the inner electrode lug is bent. For ease of understanding, an example structure of the plunger will first be described. As shown in fig. 2, the plunger 300 has a stepped structure, and the stepped structure plunger 300 includes a large cylindrical portion 301 and a small cylindrical portion 302, wherein the small cylindrical portion 302 has a diameter and a length adapted to the core hole 202 of the cylindrical battery cell 200 so as to be inserted into the core hole 202, and the large cylindrical portion 301 has a diameter larger than that of the core hole 202 and is located outside the core hole 202 after the plugging operation is completed.
Referring to fig. 3 to 5, the cylindrical battery cell processing apparatus according to the embodiment of the present invention includes a plunger feeding mechanism 1, a battery cell loading and unloading manipulator 2, a plunger transfer mechanism 3, a battery cell clamping and positioning mechanism 4, and a plunger precession mechanism 5. The plunger feeding mechanism 1 and the plunger screwing-in mechanism 5 are arranged on two opposite sides of the plunger transfer mechanism 3; the battery cell clamping and positioning mechanism 4 and the plunger transfer mechanism 3 are arranged approximately in parallel and are positioned between the plunger feeding mechanism 1 and the plunger precession mechanism 5.
The plunger feeding mechanism 1 is used for automatically feeding the plunger to the plunger transfer mechanism 3. As shown in fig. 6 to 8, the plunger feeding mechanism 1 includes a plunger feeding mechanism 11 and a plunger abutting assembly including a plunger conveying block 12, a first plunger abutting device 13 and a second plunger abutting device 14. The plunger feeding mechanism 11 is used for conveying the plunger to the plunger temporary storage groove 15; a detection device, for example a photoelectric sensor, may be provided at the plunger buffer 15, which is used to detect whether a plunger is present in the plunger buffer 15. The plunger transport block 12 has a transport through hole 121, and the plunger transport block 12 is connected to a cylinder 122 so as to be movable between the first plunger abutting means 13 and the second plunger abutting means 14.
The plunger feeding mechanism 11 comprises a plunger storage hopper 111, a plunger conveying groove 112, bearing steps 1132 with gradually increasing heights in multiple stages and lifting steps 1131 with gradually increasing heights in multiple stages, wherein the bearing steps 1132 are fixedly arranged in the plunger conveying groove 112, and the lifting steps 1131 are arranged between the adjacent bearing steps 1132; the lifting step 1131 can perform a lifting motion for realizing the step-by-step conveyance of the plunger on the multi-step bearing step 1132. Specifically, each lifting step 1131 is connected to the cylinder 116, and the cylinder 116 drives the lifting step 1131 to perform lifting movement, so as to realize the step-by-step conveyance of the plunger on the multi-stage plunger bearing step 1132, and finally, the plunger rolls down from the top end of the plunger conveying groove 112 into the plunger temporary storage groove 15. Wherein the length and width of the bearing step 1132 and the lift step 1131 may be controlled to achieve delivery of a single plunger at a time.
A plunger lifting plate 114 which can be lifted and lowered is disposed in the plunger storage hopper 111, and the plunger lifting plate 114 is driven by the air cylinder 1141 to be lifted and lowered, thereby lifting the plunger in the plunger storage hopper 111 to the lowermost receiving step 1132 among the plurality of stages.
As shown in fig. 9, the top ends of the bearing step 1132 and the lifting step 1131 each form a stepped surface 1121 adapted to the outer shape of the plunger 300, the stepped surface 1121 includes an upper surface 1123 having a high height and a lower surface 1122 having a low height, the upper surface 1123 is located on the side of the plunger transport block 12 in the X direction (see fig. 5), and the difference in height between the upper surface 1123 and the lower surface 1122 is substantially equal to the difference in radius between the large cylindrical portion 301 and the small cylindrical portion 302 of the plunger 300.
In one embodiment of the present invention, the plunger feed mechanism 11 further includes a plunger facing the screen gap 118 formed above the plunger feed groove 112 and on the side where the upper surface 1123 is located, and the height of the plunger facing the screen gap 118 is larger than the diameter of the small cylinder portion 302 but smaller than the diameter of the large cylinder portion 301, so as to allow only the small cylinder portion 302 of the plunger 300 to pass therethrough, so that the plunger 300 enters the plunger temporary storage groove 15 with the small end facing the plunger feed block 12.
As shown in fig. 10, when the plunger 300 is transferred to the step surface 1121 (the uppermost bearing step 1132) at the top end of the plunger transfer groove 112 in the correct orientation (the small end is toward the plunger transfer block 12), the small cylinder portion 302 of the plunger 300 can pass through the plunger toward the screening gap 118, and the plunger 300 can enter the plunger temporary storage groove 15 and be pushed into the plunger transfer through hole 121 by the first push rod 131.
As shown in fig. 11a, when the plunger 300 is delivered to the stepped surface 1121 at the top end of the plunger delivery chute 112 in the wrong direction (the larger end toward the plunger delivery block 12), the larger cylindrical portion 301 of the plunger 300 is stopped by the plunger toward the screening gap 118, and the plunger 300 cannot enter the plunger buffer 15. Thereby, the plunger 300 can be controlled to be transported and inserted into the bore of the cylindrical cell in a preset correct orientation.
To remove the misdirected plunger stopped on the uppermost bearing step 1132, as shown in connection with fig. 8, an abutting member 117 may be provided above the plunger conveying groove 118, the abutting member 117 being driven in translation by a cylinder 1171. As shown in fig. 11b, when the plunger 300 with wrong orientation is stopped on the step surface 1121 at the top end of the plunger conveying groove 112, the pushing part 117 moves and pushes against the large cylindrical part 301 of the plunger 300, so as to push the plunger 300 with wrong orientation forward into the plunger dropping-back groove 119. The plunger return groove 119 is provided obliquely with respect to the horizontal plane, so that the plunger 300 oriented in the wrong direction can be guided back to the plunger storing hopper 111.
In another embodiment of the present invention, the side of the upper surface 1123 of the at least one carrying step 1132 and/or the at least one elevating step 1131 has an inclined surface inclined toward the side of the plunger-dropping back groove 119 so that the plunger erroneously facing to the delivery can slide down along the inclined surface into the plunger-dropping back groove 119. Fig. 12 and 13 show a specific structure of the plunger loading mechanism in another embodiment of the present invention, in which fig. 12, the lifting step 1131 is in a lifting position for lifting the plunger to the upper stage bearing step 1132, and in fig. 13, the lifting step 1131 is in a retracted position and is not visible. As shown in fig. 12 to 14, the upper surface 1123 side of the second-step bearing step 1132 from top to bottom and the upper surface 1123 side of the uppermost elevating step 1131 each have an inclined surface 1133, and the inclined surfaces 1133 are inclined toward the plunger-dropping back groove 119 side. When the misdirected plunger 300 is seated on the bearing step 1132 and the lifting step 1131 with the ramped surface 1133, the misdirected plunger 300 slides along the ramped surface 1133 into the plunger fallback groove 119 under the force of gravity. For example, as shown in fig. 14, when the misdirected plunger 300 is seated on the bearing step 1132 having the ramped surface 1133, the misdirected plunger 300 slides along the ramped surface 1133 into the plunger fallback groove 119. In this case, a notch 1191 through which the plunger 300 slides is provided between the plunger conveying groove 112 and the plunger dropping groove 119 at a position corresponding to the inclined surface 1133, and the plunger 300 sliding down the inclined surface 1133 enters the plunger dropping groove 119 through the notch 1191.
Referring to fig. 6-7 again, the first plunger abutting device 13 has a retractable first plunger rod 131 aligned with the plunger temporary storage slot 15, the first plunger rod 131 is connected to the air cylinder 132, and when the plunger conveying block 12 moves to the conveying through hole 121 and is aligned with the plunger temporary storage slot 15, the air cylinder 132 drives the first plunger rod 131 to extend forward into the plunger temporary storage slot 15 from the initial position, so as to abut the plunger in the plunger temporary storage slot 15 against the plunger conveying through hole 121. Then, the cylinder 132 drives the first push rod 131 to retract to the initial position.
The second plunger abutting device 14 has a second retractable ejector rod 141, the second ejector rod 141 is connected to the air cylinder 142, and when the plunger conveying block 12 moves to the conveying through hole 121 and aligns with the transfer hole 321 (see fig. 5), the air cylinder 142 drives the second ejector rod 141 to enter the conveying through hole 121, so as to abut the plunger in the conveying through hole 121 to the transfer hole 321, and thus the plunger is automatically loaded to the plunger transfer mechanism 3. Then, the air cylinder 142 drives the second push rod 141 to retract and withdraw from the delivery through hole 121, and the plunger delivery block 12 can move to the position where the delivery through hole 121 is aligned with the plunger temporary storage groove 15 again, so as to reciprocate, thereby realizing the cyclic feeding to the plunger transfer mechanism 3.
Referring to fig. 5 again, the plunger transferring mechanism 3 includes a rotating table 31 and a plurality of transferring portions 32 disposed around a rotation axis of the rotating table 31, the transferring portions 32 have a cylindrical shape and have transferring holes 321 on an outer side thereof, and the plungers supplied from the plunger feeding mechanism 1 are partially inserted into the transferring holes 321. Specifically, the small cylindrical portion 302 of the plunger 300 is inserted into the transfer hole 321, and the large cylindrical portion 301 is located outside the transfer hole 321 for being gripped by the gripping head 51 of the plunger screw-in mechanism 5. The rotary table 31 rotates to rotate the transfer unit 32 into which the plunger 300 is inserted to the plunger advancing mechanism 5 side, and the plunger 300 of the transfer unit 32 can be gripped by the gripping head 51.
The cell loading and unloading manipulator 2 includes a cell clamping portion 21, where the cell clamping portion 21 is movable in mutually perpendicular X, Y and Z-axis directions, and is configured to move a cylindrical cell into and out of the cell clamping and positioning mechanism 4. The battery cell clamping and positioning mechanism 4 is used for clamping and positioning a cylindrical battery cell to be plugged, wherein, after the cylindrical battery cell 200 is clamped and positioned by the battery cell clamping and positioning mechanism 4, one end of the outer tab 203 is screwed into the mechanism 5 towards the plunger.
As shown in fig. 15, the cell clamping and positioning mechanism 4 has one or more clamping stations 42, for example two clamping stations 42 shown in fig. 15, disposed on a base 41. Each clamping station 42 is provided with a bearing seat 421, two clamping parts 422 and a positioning end 423; the bearing seat 421 has an arc-shaped bearing surface adapted to the cylindrical battery cell, so as to place the cylindrical battery cell 200; the two clamping parts 422 are movably arranged on two opposite sides of the bearing seat 421 and used for clamping the circumferential surface of the cylindrical battery core; the positioning end 423 is movably disposed on a side of the bearing seat 421 opposite to the plunger screw-in mechanism 5, and is used for abutting against an axial end of the cylindrical battery core 200. It is easy to understand that a translation driving mechanism is connected to each of the two clamping portions 422 and the positioning end 423, for example, the positioning end 423 is connected to a translation cylinder 425 in fig. 15, so as to be capable of translating along the axial direction of the cylindrical battery core 200.
Further, the bearing seat 421 may be disposed on an elastic supporting member 424 such as a spring to buffer the acting force when the cell loading and unloading robot 2 places the cylindrical cell on the bearing seat 421. The bearing seat 421 may be provided with a negative pressure adsorption hole (not visible in the figure), and the negative pressure adsorption hole is connected to a negative pressure generation system, and is used for negative pressure adsorption of a cylindrical battery cell placed on the bearing seat 421.
Referring again to fig. 5, the plunger screw-in mechanism 5 includes a clamping head 51 movable between a clamping position and a screw-in position, the clamping head 51 clamps the plunger in the transfer hole 321 at the clamping position, and rotatably inserts the small cylindrical portion 302 of the plunger 300 into the core hole 202 of the cylindrical electrical core 200 at the screw-in position (shown in fig. 5).
Specifically, the plunger precession mechanism 5 includes a first translational holder 531 provided on the translational guide rail 521 and a second translational holder 541 slidably provided on the first translational holder 531, the first translational holder 531 is driven by a motor 52 to translate in the X direction, the second translational holder 541 is driven by a motor 53 provided on the first translational holder 531 to translate in the Y direction, and the clamping head 51 is driven by a motor 54 provided on the second translational holder 541 to rotate, so that the small cylinder portion 302 of the plunger 300 can be screwed into the core hole 202 of the cylindrical electrical core 200.
Further, referring to fig. 3 and 4, the cylindrical battery cell processing apparatus according to the embodiment of the present invention further includes a tab correction bending module 6, a battery cell placing manipulator 7, and a discharging platform 8 for placing a material box 81. After the core hole plugging step of the cylindrical battery core is completed, the battery core feeding and discharging manipulator 2 moves the cylindrical battery core from the battery core clamping and positioning mechanism 4 to the lug correction bending module 6; the tab correction bending module 6 is used for bending the inner tab 204 of the cylindrical battery cell 200, and the battery cell balance manipulator 7 is used for clamping the cylindrical battery cell with the tab corrected and bent into the material box 81 on the blanking platform 8.
The tab correction bending module 6 may comprise one or more tab correction bending stations 61, for example two tab correction bending stations 61 as shown in fig. 16. Each tab correction bending station 61 comprises a first rotating shaft roller 611 and a second rotating shaft roller 612 which are arranged side by side, the first rotating shaft roller 612 and the second rotating shaft roller 612 are used for bearing a cylindrical battery cell, and the first rotating shaft roller 611 is driven by a motor 6111 to rotate so as to drive the cylindrical battery cell 200 to rotate and adjust the positions of the inner tab 204 and the outer tab 203. The center axes of the first rotating-shaft roller 612 and the second rotating-shaft roller 612 are parallel to the X direction.
The tab correction bending station 61 further has an axial limiting assembly comprising a first axial positioning end 621 and a second axial positioning end 622 which are oppositely arranged, and the first axial positioning end 621 and the second axial positioning end 622 are arranged to be capable of translating along the X direction. After the battery cell loading and unloading manipulator 2 places the cylindrical battery cell 200 on the first rotating arbor 611 and the second rotating arbor 612, the first axial positioning end 621 and the second axial positioning end 622 abut against the cylindrical battery cell 200 from the two axial ends to axially position the cylindrical battery cell 200.
The tab correction bending station 61 further has a radial limiting assembly including a limiting bracket 614 and a limiting roller 613 rotatably mounted on the limiting bracket 614, wherein the limiting bracket 614 is configured to be capable of translating in the X direction and lifting in the Z direction. After the battery cell loading and unloading manipulator 2 places the cylindrical battery cell 200 on the first rotating shaft roller 611 and the second rotating shaft roller 612, the limiting bracket 614 moves to the position where the limiting roller 613 abuts against the cylindrical battery cell 200 from the top, so as to radially limit the cylindrical battery cell 200. The limiting support 614 comprises a horizontal arm and a vertical arm which are hinged to each other, and a spring 6141 is connected between the horizontal arm and the vertical arm, so that the limiting roller 613 and the cylindrical battery core 200 are in elastic contact.
Utmost point ear is rectified and is bent station 61 still has interior utmost point ear subassembly of bending, and this interior utmost point ear subassembly of bending includes that interior utmost point ear rolls over elbow 631 and support 632 of bending, and wherein, support 632 of bending sets up to can follow X direction translation and go up and down along the Z direction, and when cylinder electricity core 200 rotated interior utmost point ear 204 and arrived the interior utmost point ear position of bending above core hole 201, the control support 632 of bending moved and made interior utmost point ear roll over elbow 631 and press down interior utmost point ear 204 to realize that interior utmost point ear bends. The inner tab 204 should at least partially cover the core hole 202 after bending, so that the inner tab 204 is required to be positioned directly above the core hole 202 before bending.
The tab correction bending station 61 also has an inner tab detection sensor assembly for detecting the position of the inner tab 204, which includes a first and second opposed photo sensors 641, 642. Among them, the first opposing photosensor 641 includes a first signal transmitting section 6411 and a first signal receiving section 6412 which are oppositely disposed in the Y direction, and the second opposing photosensor 642 includes a second signal transmitting section 6421 and a second signal receiving section 6422 which are oppositely disposed in the Y direction.
As shown in fig. 17, the signal transmission path L1 between the first signal transmitting section 6411 and the first signal receiving section 6412 is located below the bent position of the inner tab, and is closely adjacent to the inner tab 204 in the bent position; a signal transmission path L2 between the second signal transmitting section 6421 and the second signal receiving section 6422 is located below the signal transmission path L1. Here, the first signal transmission path L1 and the second signal transmission path L2 are vertically symmetrical with respect to the central axis of the cylindrical battery cell 200, and the height difference between the first and second radiation type photosensors 641 and 642 is preferably controlled as follows: at a certain time or a certain period of time before the inner tab 204 is rotated from the bottom up to the predetermined bent position, the inner tab 204 is simultaneously located on the first signal transmission path L1 and the second signal transmission path L2.
In the process of rotating the cylindrical battery cell 200 in the R direction, the bending position of the inner tab 204 can be accurately controlled by the first and second opposite-emission photosensors 641 and 642. Specifically, when both the first and second correlation photosensors 641 and 642 cannot detect the inner tab 204 at a certain time, it is impossible to determine whether the inner tab 204 is above or below the core hole 202 at that time; next, when the second correlation photosensor 642 detects the inner tab 204 first and the first correlation photosensor 641 detects the inner tab 204 later, it is determined that the inner tab 204 rotates upward from the lower side; when both the first and second correlation photosensors 641 and 642 cannot detect the inner tab 204 again, it is determined that the inner tab 204 is at the inner tab bending position directly above the core hole 202 at this time.
The inner tab correction bending process comprises the following steps: firstly, a cylindrical battery cell is placed on a first rotating shaft roller 611 and a second rotating shaft roller 612, a first axial positioning end 621 and a second axial positioning end 622 abut against two axial ends of the cylindrical battery cell to axially limit the cylindrical battery cell, and a limiting roller 613 abuts against the cylindrical battery cell from above to radially limit the cylindrical battery cell; then, the second axial positioning end 622 retracts to its initial position, the first and second correlation photoelectric sensors 641 and 642 detect the position of the inner tab 204, when the inner tab 204 is detected to rotate above the core hole 202, the motor 6111 is controlled to stop working, and the bending support 632 is controlled to move, so that the inner tab bending elbow 631 presses the inner tab 204 downward, thereby bending the inner tab.
In consideration of the error in the relative positions of the inner tab 204 and the outer tab 203, the tab correction bending station 61 may further include an outer tab detection sensor for detecting the position of the outer tab 203, and the outer tab detection sensor (third photosensor) may be a correlation type or a reflection type photosensor, but the present invention is not limited thereto.
After the inner lug bending process is completed, if the outer lug 203 is detected to be in a preset position, the radial limiting assembly is controlled to return to the initial position, the battery cell balance manipulator 7 clamps the cylindrical battery cell from the lug correction bending station 61, and the cylindrical battery cell is placed in the material box 81. If the outer tab 203 is in a non-preset position, the motor 6111 is controlled to be started again, when the cylindrical battery cell rotates to the position where the outer tab 203 is in the preset position, the motor 6111 is turned off, the radial limiting assembly is controlled to return to the initial position, the battery cell swinging disk manipulator 7 clamps the cylindrical battery cell from the tab correction bending station 61, and the cylindrical battery cell is placed in the material box 81.
Although the present invention has been described with reference to specific embodiments, these embodiments are not intended to limit the scope of the invention. It will be apparent to those skilled in the art that various changes/modifications can be made without departing from the scope of the invention, and it is intended to cover all such changes/modifications as fall within the true spirit and scope of the invention.

Claims (9)

1. A cylindrical battery cell processing device comprises a tab correction bending module, a battery cell swinging manipulator and a blanking platform, wherein the battery cell swinging manipulator is used for transferring a cylindrical battery cell from the tab correction bending module to the blanking platform; wherein, the utmost point ear is rectified and is bent the module and includes:
the battery cell bearing assembly is used for bearing the cylindrical battery cell; the battery cell bearing assembly comprises a first rotating shaft roller and a second rotating shaft roller which are arranged side by side, and the first rotating shaft roller is driven by a motor to rotate;
the battery cell axial limiting assembly is used for axially limiting the cylindrical battery cell;
the battery cell radial limiting assembly is used for radially limiting the cylindrical battery cell;
the inner tab bending assembly is used for bending the inner tab of the cylindrical battery cell from top to bottom;
the inner tab position detection assembly is used for detecting the position of the inner tab; the inner pole ear position detection assembly comprises a first photoelectric sensor and a second photoelectric sensor which are arranged up and down, the first photoelectric sensor is provided with a first signal transmission path which is horizontally arranged, the second photoelectric sensor is provided with a second signal transmission path which is horizontally arranged, and the first signal transmission path and the second signal transmission path are both positioned below a preset bending position of an inner pole ear;
the radial limiting assembly comprises a limiting bracket and a limiting roller; the limiting bracket is arranged to be capable of lifting and moving and capable of translating in the direction parallel to the roller axis of the first rotating shaft; the limiting idler wheel is rotatably arranged on the limiting support and used for supporting and pressing the cylindrical battery cell from the upper side.
2. The cylindrical cell processing apparatus of claim 1, wherein the first and second photosensors are each a correlation-type photosensor.
3. The cylindrical cell processing apparatus of claim 1, wherein the first signal transmission path and the second signal transmission path are symmetrical up and down with respect to a central axis of the cylindrical cell.
4. The cylindrical cell processing apparatus of claim 1, wherein the spacing between the first and second photosensors is such that: and at a certain moment or time period before the inner pole lug rotates to a preset bending position from bottom to top, the inner pole lug is positioned on the first signal transmission path and the second signal transmission path simultaneously.
5. The cylindrical cell processing apparatus of claim 1, wherein the inner tab bending assembly comprises a moving support and a bending head; the movable support is arranged to be capable of lifting and moving and capable of translating in the direction parallel to the roller axis of the first rotating shaft; the bending head is arranged on the movable support and used for pressing the inner pole lug from top to bottom.
6. The cylindrical cell processing apparatus of claim 1, wherein the axial limiting assembly comprises a first axial positioning end and a second axial positioning end which are arranged oppositely, and the first axial positioning end and the second axial positioning end are arranged to be capable of performing translational movement in a direction parallel to the axis of the first rotating shaft roller, so that the first axial positioning end and the second axial positioning end can approach or depart from each other in the axial direction of the cylindrical cell.
7. The cylindrical cell processing apparatus according to claim 1, wherein the limiting bracket comprises a horizontal arm and a vertical arm hinged to each other, a spring is connected between the horizontal arm and the vertical arm, and the limiting roller is disposed on the horizontal arm.
8. The cylindrical cell processing apparatus of claim 1, wherein the tab correction bending module further comprises a third photosensor for detecting a position of a tab outside the cylindrical cell.
9. The cylindrical cell machining apparatus of claim 1, further comprising:
the battery cell clamping and positioning mechanism is used for clamping and positioning the cylindrical battery cell to be plugged;
the battery cell loading and unloading manipulator is used for moving the cylindrical battery cell into the battery cell clamping and positioning mechanism and transferring the cylindrical battery cell from the battery cell clamping and positioning mechanism to the battery cell bearing assembly;
the plunger piston feeding mechanism is used for automatically feeding the plunger piston to the plunger piston transfer mechanism;
a plunger transfer mechanism including a rotary table and a plurality of transfer portions provided around a rotation axis of the rotary table, the transfer portions having transfer holes into which plungers supplied from the plunger feeding mechanism are partially inserted;
a plunger precession mechanism comprising a gripper head movable between a gripping position and a precession position; the clamping head clamps the plunger in the transfer hole at the clamping position and rotatably inserts the plunger into the core hole of the cylindrical battery core at the screwing-in position;
the plunger feeding mechanism and the plunger screwing-in mechanism are arranged on two opposite sides of the plunger transfer mechanism.
CN202011440799.8A 2020-12-08 2020-12-08 Cylindrical battery cell processing equipment Active CN112582630B (en)

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