CN109616701B - Battery cell rolling device - Google Patents

Battery cell rolling device Download PDF

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Publication number
CN109616701B
CN109616701B CN201910026249.2A CN201910026249A CN109616701B CN 109616701 B CN109616701 B CN 109616701B CN 201910026249 A CN201910026249 A CN 201910026249A CN 109616701 B CN109616701 B CN 109616701B
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Prior art keywords
material belt
rolling
diaphragm
electrode material
needle assembly
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CN109616701A (en
Inventor
文二龙
万志永
邱毅
杨永忠
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Suzhou Jieruisi Intelligent Technology Co ltd
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Suzhou Jieruisi Intelligent Technology Co ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • H01M10/0587Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing 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)
  • Primary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

The invention relates to the technical field of automatic winding equipment of lithium batteries, in particular to a battery core winding device which comprises a diaphragm material belt supply device, a positive electrode material belt supply device, a negative electrode material belt supply device and a winding needle assembly for completing the winding forming of diaphragm material belts, positive electrode material belts and negative electrode material belts at intervals through the rotation of the winding needle assembly. Wherein, the diaphragm material belt supply device is only arranged as one set; the battery cell rolling device is also provided with a diaphragm material pulling device, when two rolling needles of the rolling needle assembly are in an open state, the two rolling needles drag the diaphragm material belt to pass through a neutral position between the rolling needles, and the diaphragm is folded in half by means of the rolling action of the rolling needle assembly, so that the negative electrode material belt or the negative electrode material belt is completely wrapped, the number of diaphragm cutting material heads required for manufacturing a single battery cell is reduced to 50%, and the utilization rate of the diaphragm material belt is greatly improved; in addition, the reduction of the total number of the diaphragm material belt supply devices is more beneficial to the structural layout and optimization of the feeding system and the whole battery cell rolling device.

Description

Battery cell rolling device
Technical Field
The invention relates to the technical field of automatic winding equipment of lithium batteries, in particular to a battery core winding device.
Background
In the manufacturing process of the lithium battery cell, the positive electrode material belt, the negative electrode material belt and the diaphragm material belt which is clamped between the positive electrode material belt and the negative electrode material belt and plays an insulating role are wound through the rotary motion of the winding needle so as to form the cell. Current cell winding devices in the market are equipped with a feed system for feeding the winding pin assembly. The feeding system is composed of a first separator material belt feeding device, a positive electrode material belt feeding device, a second separator material belt feeding device and a negative electrode material belt feeding device, and in the actual cell winding process, the first separator material belt, the positive electrode material belt, the second separator material belt and the negative electrode material belt are sequentially arranged to feed materials to the winding needle assembly (shown in fig. 1). However, the following problems are inevitably present during the above operation: 1) Because the two sets of diaphragm feeding devices are arranged, the overall layout and manufacturing difficulty of a feeding system and the whole battery cell rolling device are inevitably increased, and the production investment is increased; 2) When the rolling of the single battery cell is completed, two sections of cutting material heads exist in each diaphragm material belt, so that the overall utilization rate of the diaphragm material belt is low, and the manufacturing cost of the battery cell is increased. Thus, a technician is required to solve the above problems.
Disclosure of Invention
The invention aims to solve the technical problem of providing a battery cell rolling device with simple structural design and higher utilization rate of a diaphragm material belt.
In order to solve the technical problems, the invention relates to a battery core rolling device which comprises a diaphragm material belt supply device, a positive electrode material belt supply device, a negative electrode material belt supply device and a rolling needle assembly for completing the interval rolling forming of the diaphragm material belt, the positive electrode material belt and the negative electrode material belt through the rotation of the rolling needle assembly. The diaphragm material belt supply device is only arranged as one set. The battery cell rolling device further comprises a diaphragm material pulling device, when two rolling needles of the rolling needle assembly are in an open state, the diaphragm material belt is dragged to pass through a neutral position between the two rolling needles, and then the diaphragm material belt is folded in half by means of the rolling action of the rolling needle assembly, so that the negative electrode material belt and the positive electrode material belt are completely isolated.
Further, the diaphragm material pulling device comprises a clamping mechanism, a supporting frame for supporting the clamping mechanism and a pulling mechanism for pulling the clamping mechanism to do free reciprocating linear motion relative to the supporting frame. The end part of the clamping mechanism is provided with a clamping part for clamping the diaphragm material belt, and the diaphragm material belt is always kept in a tensioning state in the process of winding the winding needle assembly.
Further, if the included angle between the positive electrode material belt and the negative electrode material belt is set to be beta, the beta is 170 degrees or more and 190 degrees or less.
Further, the pulling mechanism comprises a synchronous belt, a rotating motor for driving the synchronous belt to move and a connecting piece fixedly connected with the clamping mechanism. The connecting piece is driven by the synchronous belt, so that the clamping mechanism is driven to perform linear traction and return motion under the action of the guide device. During the return action of the traction mechanism, the rotating motor works in a torque mode.
Further, the guiding device is a guide rail sliding block component arranged between the traction mechanism and the supporting frame. The guide rail and sliding block assembly comprises a guide rail and a sliding block, wherein the guide rail is fixed on the traction mechanism, and the sliding block is fixed on the support frame.
Further, the pulling mechanism further comprises a material belt clamping assembly fixed with the connecting piece, and the material belt clamping assembly drives the clamping mechanism through clamping actions of the synchronous belt.
Further, the pulling mechanism is a linear motor. The clamping mechanism is driven by a linear motor. In the return action process of the traction mechanism, the linear motor works in a thrust mode.
Further, the diaphragm pulling device also comprises a levelness adjusting mechanism.
Further, the diaphragm pulling device comprises a placing plate for supporting the supporting frame and a bolt group for levelness adjustment of the placing plate. The bolt group is at least 2 sets, and is symmetrically arranged relative to the center position of the placing plate. The bolt group comprises an adjusting bolt which penetrates through the inner threaded hole in the placing plate, and the end part of the adjusting bolt is propped against the supporting surface opposite to the placing plate. The bolt group further comprises a fastening bolt, and the fastening bolt is used for timely locking after the placing plate is adjusted in place.
Assuming that the length of the positive electrode material belt or the negative electrode material belt for manufacturing the single-chip battery cell is a, in the actual working process, the diaphragm material belt is dragged by the diaphragm material pulling device to pass through the rolling needle assembly, the exceeding length is not smaller than the value a, the diaphragm is folded in half by means of the rolling action of the rolling needle assembly, and the negative electrode material belt or the negative electrode material belt is fully wrapped, so that the number of diaphragm cutting material heads required for manufacturing the single-chip battery cell is reduced to 50%, the utilization rate of the diaphragm material belt is greatly improved, and the production cost is reduced; in addition, a set of diaphragm material belt supply device is omitted, so that the overall structural layout and optimization of a feeding system and the battery cell rolling device are facilitated, and the miniaturization and the light weight of the battery cell rolling device are facilitated.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the working principle of a prior art battery cell winding device.
Fig. 2 is a schematic diagram of the working principle of the battery cell rolling device in the invention.
Fig. 3 is a perspective view of a separator pulling device in the cell winding device of the present invention.
Fig. 4 is a front view of a separator pulling device in the cell winding device of the present invention.
Fig. 5 is a top view of a separator pulling device in a cell rolling device of the present invention.
FIG. 6 is a perspective view of a pulling mechanism in a diaphragm pulling apparatus of the present invention.
FIG. 7 is an assembly view of the belt clamping assembly of the pulling mechanism of the present invention.
Fig. 8 is a perspective view of a placement plate in the levelness adjustment mechanism of the present invention.
1-a diaphragm material belt supply device; 2-an anode material belt supply device; 3-a negative electrode material belt supply device; 4-a winding needle assembly; 5-a diaphragm pulling device; 51-a clamping mechanism; 511-a clamping portion; 52-supporting frames; 53-a pulling mechanism; 531-a synchronous belt; 532-a rotating electric machine; 533-a connector; 534-a belt clamping assembly; 54-guiding means; 55-levelness adjusting mechanism; 551-placing a plate; 5511-adjusting threaded holes; 5512-fastening bolt holes.
Detailed Description
In the description of the present invention, it should be understood that the azimuth or positional relationship indicated by the terms "left", "right", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
The invention is described in detail below with reference to the accompanying drawings, and fig. 2 shows a schematic working principle of a battery cell winding device in the invention, which is composed of a separator material belt supply device 1, a positive electrode material belt supply device 2, a negative electrode material belt supply device 3, a winding needle assembly 4 and the like, wherein the winding needle assembly 4 completes the winding forming of the separator material belt, the positive electrode material belt and the negative electrode material belt at intervals through the rotation motion of the winding needle assembly 4. Compared with the conventional battery core winding device (as shown in fig. 1), in this embodiment, the separator material tape supply device 1 is set to one set, when two winding needles of the winding needle assembly 4 are in an open state, the separator material tape is dragged by the separator material pulling device 5 to pass through a gap between the two winding needles, and then the separator material tape is folded in half by means of the winding action of the winding needle assembly 4, so that the positive electrode material tape and the negative electrode material tape are completely isolated.
Conventional cell winding devices are known to include two separate sets of separator web supply devices that require a cutting operation to the separator web after the cell winding is completed, thereby creating four stubs. In the above embodiment, the separator material belt supply device 1 is only one set, when the battery core is rolled, no stub bar is generated at the folded end of the separator material belt, even 100% utilization can be achieved, and the stub bars are generated at the two free ends of the separator material belt, so that the utilization rate of the separator material belt is greatly improved, and the production cost is reduced.
The technical proposal of canceling a set of diaphragm material belt supply device has the following advantages: the feeding system and the whole structure layout and optimization of the battery cell rolling device are facilitated, and further the miniaturization and the light-weight of the battery cell rolling device are facilitated.
It should be noted that, during operation, the length b of the separator material strip extending through the winding needle assembly 4 needs to be strictly controlled, and b > a is given that the length a of the positive electrode material strip or the negative electrode material strip for manufacturing the single-chip battery cell is a.
From the above description, the performance of the diaphragm material pulling device 5 is particularly important for realizing the function of the whole set of battery cell rolling device in the technical scheme. Fig. 3, 4 and 5 show a perspective view, a front view and a top view of the diaphragm pulling device, which are composed of a clamping mechanism 51, a supporting frame 52, a pulling mechanism 53 and other parts, wherein the supporting frame 52 is used for supporting the clamping mechanism 51; the body of the pulling mechanism 53 is also fixed to the supporting frame 52, and pulls the holding mechanism 51 to reciprocate linearly in the left-right direction with respect to the supporting frame 52. A clamping portion 511 for clamping the diaphragm material tape is provided at an end portion of the clamping mechanism 51. The clamping portion 511 comprises two clamping jaws which are independent of each other and are freely opened and closed. In order to reasonably control the tension of the extending section of the diaphragm material belt and ensure the quality of the formed battery cell, the return speed of the clamping mechanism 51 needs to be controlled in the process of winding the winding needle assembly 4, so that the diaphragm material belt always maintains a tensioned state.
In order to ensure the synchronism and efficiency of the transmission, the pulling mechanism 53 may drive the clamping mechanism 51 by a synchronous belt conveyor, and the following may be referred to as a specific design: the drawing mechanism 53 includes a timing belt 531, a rotating motor 532 fixed to the support frame 52 for driving the timing belt 531 to move, and a link 533 (shown in fig. 5) fixedly connected to the holding mechanism 51. The connecting piece 533 is fixed with the synchronous belt through the belt clamping assembly 534, so as to drive the clamping mechanism 51 to perform linear traction and return movement under the action of the guiding device 54 (as shown in fig. 6 and 7). The rotating electric machine is operated in a torque mode during the return operation of the pulling mechanism 53. Of course, the synchronous belt conveying device can be replaced by linear power sources such as a linear motor, a cylinder and the like according to different application occasions.
The guide 54 may be a guide block assembly because of its excellent guiding properties, mating stability, and low friction. The specific setting mode is as follows: the guide rail is fixed to the pulling mechanism 53, and the slider is fixed to the support frame 52. Of course, other types of slip fit assemblies may be selected depending on the actual needs and application.
Furthermore, in order to facilitate the adjustment of the self levelness of the diaphragm pulling device 5, a levelness adjustment mechanism 55 is additionally provided. The levelness adjustment mechanism 55 is composed of a placement plate 551 for supporting the support frame 52 and a bolt set for levelness adjustment of the placement plate 551, and has a specific design form: the bolt groups are provided in 3 sets and are symmetrically arranged in the left-right direction with respect to the center position of the above-described placement plate 551. The bolt group comprises an adjusting bolt which is penetrated in the adjusting threaded hole 5511, and the end part of the adjusting bolt is propped against the supporting surface opposite to the placing plate 551. The bolt assembly further includes a fastening bolt passing through the fastening bolt hole 5512, and is fastened by the fastening bolt in time after the placement plate 551 is adjusted in place (as shown in fig. 8).
Finally, it should be noted that, when the above-mentioned battery core rolling device is used for manufacturing a square battery core, in order to make the overall stress of the winding needle assembly be balanced as much as possible, and ensure the molding quality of the battery core, the included angle β between the positive electrode material belt and the negative electrode material belt needs to be controlled, and is generally 170 ° or more and β or less than 190 °.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. The battery cell rolling device comprises a diaphragm material belt supply device, an anode material belt supply device, a cathode material belt supply device and a rolling needle assembly for completing the interval rolling forming of the diaphragm material belt, the anode material belt and the cathode material belt through the rotation action of the battery cell rolling needle assembly, and is characterized in that the diaphragm material belt supply device is only arranged as one set; the battery core rolling device further comprises a diaphragm material pulling device, when two rolling needles of the rolling needle assembly are in an open state, the diaphragm material belt is dragged to pass through a neutral space between the rolling needles, and then the diaphragm material belt is folded in half by means of the rolling action of the rolling needle assembly, so that the negative electrode material belt and the positive electrode material belt are completely isolated;
the diaphragm material pulling device comprises a clamping mechanism, a supporting frame for supporting the clamping mechanism and a pulling mechanism for pulling the clamping mechanism to do free reciprocating linear motion relative to the supporting frame; the end part of the clamping mechanism is provided with a clamping part for clamping the diaphragm material belt, and the diaphragm material belt is always kept in a tensioning state in the process of winding the winding needle assembly;
the traction mechanism comprises a synchronous belt, a rotating motor for driving the synchronous belt to move and a connecting piece fixedly connected with the clamping mechanism; the connecting piece is driven by the synchronous belt, so that the clamping mechanism is driven to perform linear traction and return movement under the action of the guide device; in the return action process of the traction mechanism, the rotating motor works in a torque mode;
the guide device is a guide rail sliding block assembly arranged between the traction mechanism and the support frame; the guide rail and sliding block assembly comprises a guide rail and a sliding block, wherein the guide rail is fixed on the traction mechanism, and the sliding block is fixed on the supporting frame;
the traction mechanism further comprises a material belt clamping assembly fixed with the connecting piece, and the clamping mechanism is driven by the clamping action of the synchronous belt.
2. The cell winding device according to claim 1, wherein the positive electrode material strip and the negative electrode material strip have an angle β of 170 ° or more and 190 ° or less.
3. The cell rolling device of claim 2, wherein the pulling mechanism is a linear motor; the clamping mechanism is driven by the linear motor; in the return action process of the traction mechanism, the linear motor works in a thrust mode.
4. The cell winding device of claim 3, wherein the diaphragm pulling device further comprises a levelness adjustment mechanism.
5. The battery cell winding device according to claim 4, wherein the levelness adjustment mechanism comprises a placement plate supporting the support frame and a bolt group for levelness adjustment of the placement plate, the bolt group being provided in at least 2 sets, and being symmetrically arranged with respect to a center position of the placement plate; the bolt group comprises an adjusting bolt which penetrates through the internal threaded hole in the placing plate, and the end part of the adjusting bolt is propped against the supporting surface opposite to the placing plate; the device also comprises a fastening bolt; and after the placing plate is adjusted in place, the placing plate is locked in time through the fastening bolts.
CN201910026249.2A 2019-01-14 2019-01-14 Battery cell rolling device Active CN109616701B (en)

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CN109616701B true CN109616701B (en) 2024-03-22

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110268564A (en) * 2019-05-09 2019-09-20 深圳市诚捷智能装备股份有限公司 Winding apparatus
CN110112471A (en) * 2019-05-09 2019-08-09 深圳市诚捷智能装备股份有限公司 Draw material device and auto reeling equipment

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102024980A (en) * 2010-10-14 2011-04-20 惠州亿纬锂能股份有限公司 Battery cell coiling device
CN202662726U (en) * 2012-04-27 2013-01-09 深圳市中天和自动化设备有限公司 Z-shaped winding mechanism of lamination machine
CN206595352U (en) * 2016-12-31 2017-10-27 中山天贸电池有限公司 A kind of novel coiling formula polymer lithium ion battery electric core
CN107645019A (en) * 2017-11-03 2018-01-30 深圳市诚捷智能装备股份有限公司 Full-automatic lithium battery cell winding machine
WO2018036489A1 (en) * 2016-08-23 2018-03-01 宁德新能源科技有限公司 Spiral-wound battery
CN108615949A (en) * 2018-06-06 2018-10-02 深圳市诚捷智能装备股份有限公司 A kind of square electric cell film-making winding apparatus
CN209747667U (en) * 2019-01-14 2019-12-06 苏州杰锐思自动化设备有限公司 Battery core rolling device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102024980A (en) * 2010-10-14 2011-04-20 惠州亿纬锂能股份有限公司 Battery cell coiling device
CN202662726U (en) * 2012-04-27 2013-01-09 深圳市中天和自动化设备有限公司 Z-shaped winding mechanism of lamination machine
WO2018036489A1 (en) * 2016-08-23 2018-03-01 宁德新能源科技有限公司 Spiral-wound battery
CN206595352U (en) * 2016-12-31 2017-10-27 中山天贸电池有限公司 A kind of novel coiling formula polymer lithium ion battery electric core
CN107645019A (en) * 2017-11-03 2018-01-30 深圳市诚捷智能装备股份有限公司 Full-automatic lithium battery cell winding machine
CN108615949A (en) * 2018-06-06 2018-10-02 深圳市诚捷智能装备股份有限公司 A kind of square electric cell film-making winding apparatus
CN209747667U (en) * 2019-01-14 2019-12-06 苏州杰锐思自动化设备有限公司 Battery core rolling device

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