CN116845376A

CN116845376A - Continuous winding machine and winding method for lithium battery

Info

Publication number: CN116845376A
Application number: CN202310872846.3A
Authority: CN
Inventors: 严海宏; 唐存福; 朱佑琦; 曾令辉; 李昌涛
Original assignee: Dongguan Lihang Automation Technology Co ltd
Current assignee: Dongguan Lihang Automation Technology Co ltd
Priority date: 2023-07-17
Filing date: 2023-07-17
Publication date: 2023-10-03

Abstract

The invention discloses a continuous winding machine and a winding method of a lithium battery, wherein the winding machine comprises an anode feeding mechanism, a cathode feeding mechanism, a film combining mechanism, a head pressing mechanism, a cutting mechanism and a tail pressing mechanism, a first diaphragm material belt is guided to be tightly attached to a cathode sheet material belt by adopting a fixed film combining roller of the film combining mechanism, the cathode sheet material belt is laminated between the first diaphragm material belt and a second diaphragm material belt to form a first material belt, and the first material belt continuously passing through a winding channel is clamped by a winding needle to be directly wound; the positive plate material belt is pushed to be tightly attached to the second diaphragm material belt by the positive plate membrane assembly of the membrane doubling mechanism, so that rapid needle threading is realized; the negative electrode sheet material belt is formed by connecting adjacent negative electrode sheets through gummed paper, the cutting mechanism cuts the negative electrode sheets from the gummed paper, and the cut negative electrode sheets are protected through gummed paper, so that burrs of the negative electrode sheets are avoided; the first end is clamped by the head pressing mechanism so as to reversely cling to and wrap the winding needle when the lithium battery is wound, and the head of the lithium battery is prevented from being folded.

Description

Continuous winding machine and winding method for lithium battery

Technical Field

The invention relates to the technical field of lithium battery winding, in particular to a lithium battery continuous winding machine and a winding method.

Background

In the related art, a lithium battery cell is formed by sequentially winding a negative plate material belt, an upper diaphragm material belt, a positive plate material belt and a lower diaphragm material belt through a winding machine, and meanwhile, the production quality and the production efficiency of the lithium battery cell are directly influenced by the working mode of the winding machine.

In the prior art, in the winding mode of the lithium battery, the feeding time of the negative electrode sheet material belt and the positive electrode sheet material belt is long, a plurality of feeding devices are required to be arranged to finish feeding of the positive electrode sheet and the positive electrode sheet, and meanwhile, in the prior winding mode, the diaphragm is required to be pre-wound at least one circle, and the pre-winding time is long by adopting the pre-winding mode, so that the diaphragm is wasted; further, the conventional winding method cannot perform continuous winding, and winding efficiency is low.

Aiming at the problems of low winding efficiency caused by long winding feeding time and winding time consumption for pre-winding of a lithium battery cell in the related art, a better technical scheme is not yet available.

Disclosure of Invention

In view of the above, it is necessary to provide a continuous winding machine and a winding method for lithium batteries, so as to at least solve the problems of low winding efficiency caused by long feeding time and consumed winding time for pre-winding of the battery cells of the lithium batteries in the related art.

In a first aspect, an embodiment of the present application provides a continuous winding machine for a lithium battery, including a panel, where the panel is provided with a winding mechanism, an anode feeding mechanism, a cathode feeding mechanism, a film combining mechanism, a head pressing mechanism, a cutting mechanism and a tail pressing mechanism, which are sequentially arranged around the winding mechanism, where the anode feeding mechanism is used to match with limit of an anode guide roller to feed an anode sheet material belt to a winding needle corresponding to the winding mechanism, and cut the anode sheet material belt when the anode sheet material belt is fed for a preset length; the negative electrode feeding mechanism is used for cutting the continuous negative electrode sheet material strip after the continuous negative electrode sheet material strip is unreeled for a preset length, connecting adjacent negative electrode sheets by using gummed paper to form a negative electrode sheet material strip after the cut negative electrode sheets are arranged at intervals, and continuously discharging the negative electrode sheet material strip to a winding channel of the winding needle at a winding position in cooperation with limit of a negative electrode guide roller; the film combining mechanism comprises a fixed film combining roller and a positive film combining component, wherein the fixed film combining roller is used for guiding a first diaphragm material belt of a first material belt to the negative plate material belt which is tightly attached to the first material belt, and the positive film combining component is used for pushing the positive plate material belt to a second diaphragm material belt which is tightly attached to the first material belt, so that after the winding needle at a winding position penetrates through the needle, the positive plate material belt and the first material belt penetrate into the winding channel; the cutting mechanism is used for cutting the first material belt from the corresponding gummed paper when the head pressing mechanism clamps the first end part of the first material belt penetrating along the winding channel and the tail pressing mechanism clamps the second end part of the first material belt penetrating; the winding needle is positioned at the winding position and is used for winding the first material belt clamped at the first end part by the head pressing mechanism and the positive plate material belt fed by the positive feeding mechanism by taking the direction of the negative plate material belt to the positive plate material belt as the winding direction.

In a second aspect, an embodiment of the present application provides a winding method, which uses the continuous lithium battery winding machine according to the first aspect to wind, and the winding method includes:

s1, in the process that the winding needle positioned at a winding position rotates to a blanking position, the winding needle is utilized to pull the first diaphragm material belt, the negative electrode sheet continuous material belt and the second diaphragm material belt which are continuously discharged forwards;

s2, cutting the negative electrode piece continuous material belt after unreeling the negative electrode piece continuous material belt for a preset length by utilizing the negative electrode feeding mechanism, connecting adjacent negative electrode pieces by using the gummed paper to form the negative electrode piece material belt after the negative electrode pieces cut at intervals are arranged, and continuously discharging the negative electrode piece material belt to a winding channel of the winding needle at a winding position in cooperation with limit of the negative electrode guide roller;

s3, guiding the first diaphragm material belt to be tightly attached to the negative electrode sheet material belt through the fixed film-combining roller, and pushing the positive electrode sheet material belt to be tightly attached to the second diaphragm material belt through the positive electrode film-combining assembly, so that the positive electrode sheet material belt and the first material belt are arranged in the winding channel in a penetrating manner after the winding needle at the winding position penetrates through the winding needle;

S4, the winding needle positioned at the winding position extends out, and the first material belt continuously passes through the winding channel of the winding needle;

s5, pulling the first material belt of the threading needle by using the coil at the blanking position, and clamping a first end part of the first material belt penetrating along the winding channel by using the head pressing mechanism and clamping a second end part of the first material belt penetrating through the tail pressing mechanism by using the tail pressing mechanism;

s6, cutting the first material belt from the corresponding gummed paper by using the cutting mechanism;

s7, feeding the positive plate material belt into the winding channel of the winding needle at a winding position by utilizing the positive plate feeding mechanism;

s8, winding the positive plate material belt which is fed by the first material belt and the positive plate material feeding mechanism and is clamped at the first end part by the head pressing mechanism by using the winding needle positioned at the winding position, wherein the direction of the negative plate material belt to the positive plate material belt is taken as the winding direction, and when the length of the positive plate material belt fed into the winding channel corresponding to the winding needle reaches a preset length, the positive plate material belt is cut by using the positive plate material feeding mechanism.

Compared with the prior art, the continuous winding machine and the winding method for the lithium battery provided by the embodiment of the application have the advantages that the first diaphragm material belt is guided to be tightly attached to the negative plate material belt by adopting the fixed film-combining roller, the first material belt is formed by laminating the negative plate material belt between the first diaphragm material belt and the second diaphragm material belt, the first material belt is clamped by the winding needle to continuously pass through the winding channel of the winding needle during winding, direct winding can be performed, diaphragm pre-winding is not needed, and the pre-winding time of the head part of the diaphragm is saved; the positive plate material belt is pushed to be tightly attached to the second diaphragm material belt through the positive plate membrane assembly, so that the quick needle threading of the winding needle is facilitated; in addition, by adopting a mode of connecting adjacent negative plates by using adhesive paper, when a cutting mechanism is adopted for cutting, cutting is carried out from the adhesive paper, and the negative plates in cutting are protected by the adhesive paper, so that burrs are prevented from being generated at the head parts of the negative plates; furthermore, the first end is clamped by the head pressing mechanism, and when the lithium battery is wound, the first end is reversely stuck tightly to wrap the winding needle, so that the head of the lithium battery is prevented from being folded; the continuous winding machine for the lithium battery solves the problems of low winding efficiency caused by long feeding time and winding time consumption for pre-winding of the battery core of the lithium battery in the related technology, and has the beneficial effects of connecting winding, improving the winding efficiency and reducing the winding cost.

Drawings

Fig. 1 is a schematic view of a wound lithium battery according to an embodiment of the present application;

fig. 2 is a schematic view of a lithium battery continuous winder according to an embodiment of the present application;

fig. 3 is a schematic view of a needle threading of a continuous lithium battery winding machine according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a continuous lithium battery winding machine according to an embodiment of the present application when cutting a first material strip;

fig. 5 is another schematic view of a continuous winding machine for lithium batteries according to an embodiment of the application when cutting a first material strip

Fig. 6 is a schematic view of a continuous winding machine for lithium batteries according to an embodiment of the present application;

FIG. 7 is a perspective view of a cut-and-paste mechanism according to an embodiment of the application;

FIG. 8 is a front view of a cut-and-paste mechanism according to an embodiment of the present application;

FIG. 9 is a perspective view of a positive electrode charging mechanism according to an embodiment of the present application;

FIG. 10 is a perspective view of a severing mechanism according to an embodiment of the present application;

FIG. 11 is a perspective view of a positive electrode and membrane assembly according to an embodiment of the application;

FIG. 12 is a perspective view of a winding mechanism according to an embodiment of the present application;

fig. 13 is a schematic view of a lithium battery continuous winder according to a preferred embodiment of the present application.

Reference numerals:

01. positive plate material belt; 02. a positive plate; 03. a second separator strip; 04. a negative plate material belt; 05. a first separator strip; 06. a first material belt; 07. glue paper; 08. a negative electrode sheet; 09. a second diaphragm; 10. a first diaphragm; 11. a negative electrode sheet continuous material belt; 12. a film material belt;

100. A panel; 101. a positive electrode guide roller; 102. a negative electrode guide roller;

200. a winding mechanism; 21. a winding needle; 201. a winding channel; 22. a revolution assembly; 23. winding a base; 24. a base body seat; 25. a base turntable;

300. a positive electrode feeding mechanism; 31. a mounting plate; 32. a first linear slide rail; 33. a first slider; 34. a second slider; 35. a first transmission assembly; 36. a second transmission assembly; 37. a sheet feeding clamp assembly; 38. a second pole piece cutting assembly; 370. a first driving cylinder; 371. a first mounting plate; 372. a first fixed block; 373. a first guide post; 374. a first movable block; 375. a press roller; 376. a fixed sheet feeding clamp; 377. a movable press roll; 378. a movable film feeding clamp; 379. a linkage block; 381. a second cutter base; 382. fixing the cutter; 383. a first tool apron; 384. a second guide post; 385. a movable knife holder; 386. a cutter pressing plate; 387. a second driving cylinder;

400. a negative electrode feeding mechanism; 41. a negative plate unreeling mechanism; 411. a first unreeling roller unit; 412. the first driven guide roller; 42. cutting and rubberizing mechanism; 44. a first pole piece cutting assembly; 45. a paste adhesive assembly; 441. a first cutter mount; 442. a ball screw; 443. an upper tool apron; 444. a first guide post; 445. an elastic member; 446. a pressing knife is arranged; 447. a first driving unit; 448. a cutting knife; 449. a second driving unit; 46. a rubberizing unit; 47. a glue preparation unit; 461. a first support; 462. a rubberizing sliding seat; 463. a guide rod; 464. vacuum adsorption rubberizing knife; 465. A rubberizing driving unit; 471. a second support; 472. an gummed paper unreeling unit; 473. a gummed paper pressing unit; 474. a gummed paper cutting unit; 475. a glue pressing driving unit; 476. briquetting; 477. a cutting driving unit; 478. a vacuum cutting knife;

500. A film combining mechanism; 51. fixing and combining a film roller; 52. a positive electrode membrane assembly; 521. a bottom plate; 522. a third linear guide rail; 523. A follower plate; 524. a third transmission assembly; 525. a top roller;

600. a head pressing mechanism; 61. a film leaning roller; 62. cutting off the press roller;

700. a cutting mechanism; 71. a mounting base plate; 72. a fourth linear guide rail; 73. cutting a base; 74. a fourth transmission assembly; 75. a cutting unit; 76. an auxiliary press roller unit; 77. an adjustable nut; 751. a cutter press roll; 752. a diaphragm cutter; 761. a lower press roll;

800. a tail pressing mechanism; 81. tail press roller; 82. a lower press roll;

900. the positive plate unreeling mechanism; 91. a second unreeling roller unit; 92. a second driven guide roller;

110. a first diaphragm unreeling mechanism;

120. a second diaphragm unreeling mechanism.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 13, the continuous winding machine for lithium battery of the embodiment of the application includes a panel 100, a winding mechanism 200, a positive feeding mechanism 300, a negative feeding mechanism 400, a film combining mechanism 500, a head pressing mechanism 600, a cutting mechanism 700 and a tail pressing mechanism 800 sequentially arranged around the winding mechanism 200 are arranged on the panel 100, wherein,

The positive feeding mechanism 300 is used for feeding the positive sheet material belt 01 to the winding needle 21 corresponding to the winding mechanism 200 in cooperation with the limit of the positive guide roller 101, and cutting the positive sheet material belt 01 when the positive sheet material belt 01 is fed for a preset length.

In this embodiment, when the positive electrode feeding mechanism 300 feeds the positive electrode sheet material tape 01 into the winding channel 201 of the winding needle 21 at the winding position, when the length of the fed positive electrode sheet material tape 01 reaches the preset length, the front end portion of the positive electrode sheet material tape 01 is cut, so that the cut portion exists in the form of a positive electrode sheet 02; in this embodiment, the time when the positive electrode sheet material tape 01 is cut may be the time when the winding is completed, or may be during the winding; when winding is completed, the positive electrode feeding mechanism 300 feeds the positive electrode sheet material tape 01 again to the winding needle 21 at the winding position with the cutting position being the head of the positive electrode sheet material tape 01, regardless of cutting during winding or cutting after winding is completed.

In this embodiment, the positive electrode guide roller 101 is configured to ensure that the tape path of the positive electrode sheet material tape 01 is unchanged when the auxiliary threading is implemented, so as to avoid interference with other mechanisms.

The negative electrode feeding mechanism 400 is configured to cut the negative electrode continuous material strip 11 after the negative electrode continuous material strip 12 is unreeled by a preset length, and connect adjacent negative electrode strips 08 with adhesive paper 07 to form a negative electrode material strip 04 after the previously cut negative electrode strips 08 are arranged at intervals, and continuously unreel the negative electrode material strip 04 to the winding channel 201 of the winding needle 21 at the winding position in cooperation with the limit of the negative electrode guide roller 102.

In this embodiment, the negative electrode guide roller 102 is configured to ensure that the tape path of the negative electrode sheet material tape 04 is unchanged when the auxiliary threading is implemented, so as to avoid interference with other mechanisms; in this embodiment, when the negative electrode continuous material belt 12 is cut, the negative electrode feeding mechanism 400 cuts the negative electrode continuous material belt 12 unwound by the negative electrode feeding mechanism 400 after reaching a preset length, so as to cut the current negative electrode sheet 08, the current negative electrode sheet 08 is forward-rotated, and after a certain gap is formed between the current negative electrode sheet 08 and the previous cut negative electrode sheet 08, the current negative electrode sheet 08 is connected with the previous negative electrode sheet 08 through the cut adhesive tape 07, and after continuing to forward-rotate for a certain period, a certain gap is formed between the current negative electrode sheet 08 and the next negative electrode sheet 08, and after the next negative electrode sheet 08 is cut, the current negative electrode sheet 08 is continuously connected with the current negative electrode sheet 08 through the cut adhesive tape 07, so that the current negative electrode sheet material belt 04 is formed in the embodiment of the application through first connection; meanwhile, the negative electrode feeding mechanism 400 is used for cutting and rubberizing to generate a negative electrode sheet material belt 04, then unreeling the negative electrode sheet material belt 04 to the negative electrode guide roller 102 until the negative electrode sheet material belt 04 is sent to a position matched with a winding channel 201 of a winding needle 21, and after the winding needle 21 penetrates through the winding needle, the negative electrode sheet material belt 04 is laminated with the first diaphragm material belt 05 and the second diaphragm material belt 03 which are unreeled, and the first material belt 06 is laminated and tightly adhered.

The film combining mechanism 500 comprises a fixed film combining roller 51 and a positive film combining component 52, wherein the fixed film combining roller 51 is used for guiding the first diaphragm material belt 05 of the first material belt 06 to the negative plate material belt 04 which is tightly attached to the first material belt 06, and the positive film combining component 52 is used for pushing the positive plate material belt 01 to the second diaphragm material belt 03 which is tightly attached to the first material belt 06, so that after the winding needle 21 at the winding position penetrates through the needle, the positive plate material belt 01 and the first material belt 06 penetrate through the winding channel 201.

In this embodiment, before the positive electrode and the membrane assembly 52 push the second separator material tape 03, the winding needle 21 that completes winding will pull the first separator material tape 05, the negative electrode sheet material tape 04 and the second separator material tape 03 to move in the process of rotating from the winding position to the blanking position, and at this time, the winding needle 21 located at the blanking position will rotate to the winding position at the previous time; in this embodiment, referring to fig. 2 to 4 and 6, when the second separator material tape 03 is walked, it will walk vertically downwards, the negative electrode sheet material tape 04 is guided by the negative electrode guiding roller 102 to be close to the second separator material tape 03, and the first separator material tape 05 is fixed and the film roller 51 is guided to be close to the negative electrode sheet material tape 04 to be in a vertically downwards walking state, so that the first separator material tape 05, the negative electrode sheet material tape 04 and the second separator material tape 03 are stacked and in a vertically downwards state, and when the winding needle 21 rotated to the winding position extends along the axial direction thereof, the stacked first separator material tape 05, negative electrode sheet material tape 04 and second separator material tape 03 penetrate into the winding channel 201 of the winding needle 21, and then the needle of the first material tape 06 penetrates.

In this embodiment, the winding needle 21 clamps the first tape 06 after the first tape 06 passes through the winding passage 201 to complete the threading.

The cutting mechanism 700 is used for cutting the first material belt 06 from the corresponding gummed paper 07 when the head pressing mechanism 600 clamps the first end part (corresponding to the head part of the negative electrode sheet 08, the first diaphragm 10 and the second diaphragm 09) of the first material belt 06 penetrating through the winding channel 201 and the tail pressing mechanism 800 clamps the second end part (corresponding to the tail part of the negative electrode sheet 08, the first diaphragm 10 and the second diaphragm 09) of the first material belt 06 penetrating through the tail pressing mechanism 800.

In this embodiment, the negative electrode sheet material tape 04 is formed by adhering a plurality of negative electrode sheets 08 together through adhesive paper 07, the length of the negative electrode sheet 08 is matched with winding requirements, in order to avoid burrs generated at the head and tail of the cut negative electrode sheet 08 when the first material tape 06 is cut off and wound, in this embodiment, each adhesive paper 07 is used as a cutting line when the cutting mechanism 700 cuts the first material tape 06, by cutting the adhesive paper 07, burrs are not generated at the head and tail ends of the corresponding negative electrode sheet 08 when the cutting of the negative electrode sheet 08 is realized, and further protection by the adhesive paper 07 is realized, and the safety of the wound lithium battery is improved; meanwhile, in order to ensure stable connection of the adhesive paper 07 to the adjacent two negative electrode sheets 08, in the present embodiment, the adhesive paper 07 is attached to both sides of the adjacent two negative electrode sheets 08.

The winding needle 21 at the winding position winds the first material tape 06 having the first end portion sandwiched by the head pressing mechanism 600 and the positive electrode sheet material tape 01 fed by the positive electrode feeding mechanism 300 in a winding direction in which the negative electrode sheet material tape 04 is wound in the positive electrode sheet material tape 01 direction (counterclockwise in this embodiment).

In this embodiment, the negative electrode sheet material tape 04 is cut by using the gummed paper 07 as a cutting line, and the first diaphragm material tape 05 and the second diaphragm material tape 03 are cut, the winding needle 21 simultaneously clamps the negative electrode sheet 08, the first diaphragm 10 and the second diaphragm 09 and starts to rotate, at this time, the positive electrode membrane combining component 52 returns to the original position, the head pressing mechanism 600 clamps the first end part, the first end part is reversely tightly attached to the winding needle 21, the head of the lithium battery is prevented from being folded, and the lithium battery is formed after the winding needle 21 rotates for a set number of turns.

In this embodiment, the positive electrode sheet material tape 01 is fed into the winding channel 201 of the winding needle 21 at the winding position at the winding start, and after the winding starts, the positive electrode sheet material tape 01 is fed forward, and when the positive electrode sheet material tape 01 is fed to a predetermined length or the length of the wound positive electrode sheet material tape 01 reaches the predetermined length, the positive electrode feeding mechanism 300 cuts the positive electrode sheet material tape 01 from the boundary of the predetermined length, so that the cut portion exists as the positive electrode sheet 02.

In the continuous lithium battery winding machine, the first diaphragm material belt 05 is guided to be tightly attached to the negative electrode sheet material belt 04 by adopting the fixed film-combining roller 51, the first material belt 06 is formed by laminating the negative electrode sheet material belt 04 between the first diaphragm material belt 05 and the second diaphragm material belt 03, the first material belt 06 is clamped by the winding needle 21 during winding and continuously passes through the winding channel 201 of the winding needle 21, direct winding can be performed, diaphragm pre-winding is not needed, and the pre-winding time of the head of the diaphragm is saved; the positive plate material belt 01 is pushed to be tightly attached to the second diaphragm material belt 03 through the positive plate membrane assembly 52, so that the quick needle threading of the winding needle 21 is facilitated; moreover, by adopting a mode of connecting the adjacent negative electrode plates 08 by using the adhesive paper 07, when the cutting mechanism 700 is adopted for cutting, the adhesive paper 07 is used for cutting, and the adhesive paper 07 is used for protecting the negative electrode plates 08 in cutting, so that burrs are prevented from being generated at the heads of the negative electrode plates 08; furthermore, the first end is clamped by the head pressing mechanism 600, and when the lithium battery is wound, the first end is reversely tightly attached to the winding needle 21, so that the head of the lithium battery is prevented from being folded; the continuous winding machine for the lithium battery solves the problems of low winding efficiency caused by long feeding time and winding time consumption for pre-winding of the battery core of the lithium battery in the related technology, and has the beneficial effects of connecting winding, improving the winding efficiency and reducing the winding cost.

To effect unreeling of the negative electrode sheet continuous stock tape 11, and cutting the negative electrode sheet continuous stock tape 11 out of the negative electrode sheet 08 and connecting the cut out plurality of negative electrode sheets 08 arranged at intervals with a gummed paper 07 to produce a negative electrode sheet stock tape 04, referring to fig. 2, 7, 8, in some embodiments, the negative electrode feeding mechanism 400 comprises a negative electrode sheet unreeling mechanism 41, a sheet guide roller 42, and a cutting and rubberizing mechanism 43, wherein,

the negative electrode sheet unreeling mechanism 41 comprises a first unreeling roller unit 411 and a plurality of first driven guide rollers 412, wherein the first unreeling roller unit 411 is arranged on the panel 100, the plurality of first driven guide rollers 412 are arranged along a set unreeling direction, and the first unreeling roller unit 411 is used for unreeling the negative electrode sheet continuous material belt 11 to the cutting rubberizing mechanism 43 by being matched with the corresponding guide of the plurality of first driven guide rollers 412.

The cutting and rubberizing mechanism 43 is used for cutting the negative electrode continuous material belt 11 after the negative electrode continuous material belt 11 is unreeled for a preset length, connecting adjacent negative electrode plates 08 by gummed paper 07 to form a negative electrode material belt 04 after the negative electrode plates 08 cut earlier are arranged at intervals, and continuously discharging the negative electrode material belt 04 to a winding channel 201 of a winding needle 21 at a winding position by matching the guiding of a corresponding electrode plate guide roller 42 and the limiting of a negative electrode guide roller 102.

In this embodiment, when the negative electrode continuous material belt 11 is cut by the cutting and rubberizing mechanism 43, the negative electrode unwinding mechanism 41 unwinds until the length of the negative electrode continuous material belt 11 of the cutting and rubberizing mechanism 43 reaches a preset length, and then cuts the negative electrode 08, the current negative electrode 08 flows forward, and after a certain gap is formed between the current negative electrode 08 and the previous negative electrode 08, the current negative electrode 08 is connected with the previous negative electrode 08 through the cut adhesive paper 07, and after a certain period of forward flowing, a certain gap is formed between the current negative electrode 08 and the next negative electrode 08, and after the next negative electrode 08 is cut, the current negative electrode 08 is connected with the current negative electrode 08 through the cut adhesive paper 07, so as to form the negative electrode material belt 04 in the embodiment of the application.

It should be understood that the positive electrode sheet unreeling mechanism 41 in the embodiment of the present application includes, but is not limited to, the unreeling mechanism shown in the drawings, and the positive electrode sheet unreeling mechanism 41 satisfying the unreeling of the negative electrode sheet continuous material tape 11 and conveying the negative electrode sheet continuous material tape 11 to the cutting and rubberizing mechanism 43 abutted therewith may be used for the unreeling mechanism corresponding to the embodiment of the present application. The specific structure of the positive electrode sheet unreeling mechanism 41 is not limited to the positive electrode sheet unreeling mechanism 41 according to the embodiment of the present application.

To achieve cutting out the negative electrode sheet 08 and connecting the cut out pieces of negative electrode sheet 08 in spaced arrangement with an adhesive tape 07 to create a negative electrode sheet strip 04, referring to the figures, in some embodiments, the cutting and rubberizing mechanism 43 comprises a first sheet cutting assembly 44 and a rubberizing assembly 45 that interfaces with the first sheet cutting assembly 44, wherein,

the first pole piece cutting assembly 44 comprises a first cutter base 441 arranged on the vertical panel 100, the first cutter base 441 is connected with an upper cutter seat 443 through a ball screw 442, the upper cutter seat 443 is connected with an upper pressing cutter 446 through a first guide pillar 444 and an elastic piece 445, the upper cutter seat 443 is also in transmission connection with a first driving unit 447 arranged on the first cutter base 441, the first cutter base 441 is also provided with a second driving unit 449 in transmission connection with a cutting cutter 448, the cutting cutter 448 is also arranged opposite to the upper pressing cutter 446, wherein the first driving unit 447 transmits the upper pressing cutter 446 to move towards the cutting cutter 448 driven by the second driving unit 449 so as to cut the negative pole piece continuous material belt 11 passing through the first pole piece cutting assembly 44 according to a preset length, and the negative pole pieces 08 are cut out successively; in the present embodiment, the first driving unit 447 and the second driving unit 449 include, but are not limited to, a driving cylinder and a linear motor, and it should be understood that the first driving unit 447 which satisfies the requirement of the embodiment of the present application for driving the upper pressing blade 446 to move toward the cutting blade 448 does not constitute a limitation of the first driving unit 447 in the embodiment of the present application, and the second driving unit 449 which satisfies the requirement of the embodiment of the present application for driving the cutting blade 448 to move toward the upper pressing blade 446 does not constitute a limitation of the second driving unit 449 in the embodiment of the present application.

The adhesive preparation assembly 45 comprises two oppositely arranged adhesive preparation units 46 and two oppositely arranged adhesive preparation units 47, wherein,

each rubberizing unit 46 comprises a first support seat 461 fixedly connected with the panel 100, a rubberizing sliding seat 462 capable of sliding is hung on a truss plate of the first support seat 461, the rubberizing sliding seat 462 is connected with a vacuum adsorption rubberizing cutter 464 through a guide rod 463, the vacuum adsorption rubberizing cutter 464 is further in transmission connection with a rubberizing driving unit 465 arranged on the rubberizing sliding seat 462, the rubberizing sliding seat 462 drives the vacuum adsorption rubberizing cutter 464 to be arranged opposite to the rubberizing preparation unit 47, the vacuum adsorption rubberizing cutter 464 is driven by the matched rubberizing driving unit 465 to move towards the cut negative electrode slices 08, the rubberizing paper 07 conveyed to the vacuum adsorption rubberizing cutter 464 by the vacuum adsorption fixation rubberizing unit 47 is connected with adjacent negative electrode slices 08 in the negative electrode slices 08 in a spaced arrangement through the rubberizing paper 07 cut by the corresponding rubberizing preparation unit 47, and the negative electrode slices 08 are connected into a negative electrode slice material belt 04.

In the present embodiment, the fact that the rubberizing sliding seat 462 drives the vacuum adsorption rubberizing knife 464 to be positioned opposite to the rubberizing unit 47 means that the rubberizing sliding seat 462 drives the vacuum adsorption rubberizing knife 464 to move to be positioned right in front of the moving direction of the film material belt 12 unreeled by the rubberizing unit 47, that is, after the rubberizing unit 47 realizes unreeling the film material belt 12 and cutting out the gummed paper 07, the gummed paper 07 is placed on the corresponding vacuum adsorption rubberizing knife 464; thereafter, the paste driving units 465 above and below the cut negative electrode sheet 08 drive the corresponding vacuum suction paste cutters 464 to move toward the two negative electrode sheets 08 with a certain gap therebetween, so as to paste the positive and negative surfaces of the two negative electrode sheets 08.

Each glue preparation unit 47 comprises a second support 471 fixedly connected with the panel 100, and the second support 471 is provided with a glue unreeling unit 472, a glue pressing unit 473 and a glue cutting unit 474 which are sequentially arranged, wherein,

the gummed paper unwinding unit 472 is used for unwinding the film stock tape 12 towards the gummed paper pressing unit 473 and the gummed paper cutting unit 474;

the glue pressing driving unit 475 of the glue pressing paper unit 473 moves towards the unreeled film material belt 12 by driving the pressing block 476 connected with the glue pressing driving unit 475 to press the film material belt 12 to move and stop conveying the unreeled film material belt 12;

the cutting driving unit 477 of the gummed paper cutting unit 474 feeds the film strip 12 through a vacuum cutting knife 478 in transmission connection with the cutting driving unit, and cooperates with the vacuum adsorption fixation of the vacuum adsorption gumming knife 464 of the gummed paper sticking unit 46 and the compression of the gummed paper pressing unit 473 on the film strip 12 to cut out the corresponding gummed paper 07.

In this embodiment, the cutting and rubberizing mechanism 43 cuts the negative electrode sheet continuous material belt 11 and then glues, the gap between two adjacent negative electrode sheets 08 is connected and protected by gummed paper 07, and burrs are prevented from being formed on the negative electrode sheets 08, so that the safety and reliability of the battery cell can be ensured.

It can be understood that, in this embodiment, the cutting and rubberizing mechanism 43 cuts the continuous material belt 11 of the negative electrode sheet according to a preset length, in order to ensure continuous feeding, two opposite ends of two cut adjacent negative electrode sheets 08 need to be glued by using gummed paper 07, so as to form a negative electrode sheet material belt 04, and before being glued, the two cut adjacent negative electrode sheets 08 need to be pulled apart by a certain gap, so that when the cutting mechanism 700 cuts the first material belt 06, the cutting mechanism 700 cuts the gummed paper 07, but not the negative electrode sheet 08, so as to avoid forming cutting burrs on the negative electrode sheet 08; meanwhile, in order to meet the requirements of stability of continuous feeding and protection of the negative electrode sheet 08 in the cutting process, rubberizing is carried out on the front side and the back side of the cut negative electrode sheet 08.

In order to realize feeding and chase cutting of the positive electrode sheet material tape 01, referring to fig. 2, 3 and 9, in some embodiments, the positive electrode feeding mechanism 300 includes a mounting plate 31 connected to the panel 100, a first linear slide rail 32 extending along a length direction of the mounting plate 31 is provided on the mounting plate 31, a first slide seat 33 and a second slide seat 34 are provided on the first linear slide rail 32, a first transmission assembly 35 in transmission connection with the first slide seat 33 and a second transmission assembly 36 in transmission connection with the second slide seat 34 are further provided on the mounting plate 31, a sheet feeding clamp assembly 37 is provided on the first slide seat 33, a second electrode sheet cutting assembly 38 in movable butt joint with the sheet feeding clamp assembly 37 is provided on the second slide seat 34, wherein,

the first transmission assembly 35 transmits the first sliding seat 33 to drive the sheet feeding clamp assembly 37 to face the second sheet cutting assembly 38, so that the sheet feeding clamp assembly 37 clamps the positive sheet material belt 01 to move towards the second sheet cutting assembly 38, and sheets are fed to the second sheet cutting assembly 38; meanwhile, the second transmission assembly 36 transmits the second sliding seat 34 to drive the second pole piece cutting assembly 38 to move towards the winding needle 21 at the winding position, so as to deliver the positive pole piece material belt 01 to the winding needle 21 at the winding position, and when the length of the delivered positive pole piece material belt 01 reaches the preset length, the positive pole piece material belt 01 is cut, and then the positive pole piece 02 with the preset length is cut.

In the present embodiment, the first transmission assembly 35 that is adapted to transmit the sliding motion of the first slider 33 along the first linear rail 32 is suitable for the first transmission assembly according to the embodiment of the present application, for example: the first transmission component 35 may be a ball screw module, or may be a screw sliding table module; the second drive assembly 36 that is adapted to drive the second carriage 34 along the first linear slide 32 is suitable for use in the second drive assembly of the present embodiment, for example: the second transmission assembly 36 may be a ball screw module or a screw slide module.

In some alternative embodiments, referring to fig. 9, the sheet feeding clamp assembly 37 includes a first mounting plate 371 slidably connected with the first slide 33, a first fixed block 372 is disposed on one side of the first mounting plate 371 in the width direction, the first fixed block 372 is connected to a first movable block 374 opposite to the first fixed block 372 through a first guide pillar 373, a pressing roller 375 is disposed on an end surface of the first fixed block 372 opposite to the first movable block 374, a fixed sheet feeding clamp 376 extending toward the second sheet cutting assembly 38 is fixedly disposed on a side end surface of the first fixed block 372 in the thickness direction, a dynamic pressure roller 377 opposite to the pressing roller 375 in the disposed position is disposed on the first movable block 374, the first movable block 374 is fixedly connected to a movable sheet feeding clamp 378 opposite to the fixed sheet feeding clamp 376, one end of the first guide pillar 373 away from the first movable block 374 is connected to a linkage block 379, and the linkage block 379 is further connected to a first driving cylinder 370 disposed on the first mounting plate 371 in a transmission manner.

In this embodiment, the first driving cylinder 370 drives the first movable block 374 to drive the movable press roller 377 and the movable sheet feeding clamp 378 to move towards the press roller 375 and the fixed sheet feeding clamp 376 respectively, so as to clamp the unreeled positive sheet material belt 01 correspondingly, and the first sliding seat 33 is matched with the first driving assembly 35 to drive the sheet feeding clamp assembly 37 to face the second sheet cutting assembly 38, so that the positive sheet material belt 01 is conveyed towards the second sheet cutting assembly 38.

In this embodiment, during the process of conveying the positive electrode sheet material tape 01 toward the second electrode sheet cutting assembly 38 by the sheet feeding clamp assembly 37, the second electrode sheet cutting assembly 38 also moves along the feeding direction of the positive electrode sheet material tape 01, that is, when the feeding of the positive electrode sheet material tape 01 does not reach the preset length, the second electrode sheet cutting assembly 38 assists in feeding, when the feeding of the positive electrode sheet material tape 01 reaches the preset length, the sheet feeding clamp assembly 37 stops conveying the positive electrode sheet material tape 01, and the second electrode sheet cutting assembly 38 moves to the corresponding cutting position in an accelerating manner so as to cut the positive electrode sheet material tape 01, so as to cut the positive electrode sheet 02 with the preset length.

In some alternative embodiments, referring to fig. 9, the second pole piece cutting assembly 38 includes a second cutter base 381 fixedly connected to the second slide 34, a first cutter holder 383 for mounting a fixed cutter 382 is fixedly arranged on the second cutter base 381, the second cutter base 381 is connected to a movable cutter holder 385 opposite to the first cutter holder 383 through a second guide post 384, a cutter pressing plate 386 is arranged at a position opposite to the fixed cutter 382 of the movable cutter holder 385, and the movable cutter holder 385 is also in transmission connection with a second driving cylinder 387 arranged on a side wall of the second cutter base 381.

In this embodiment, the second driving cylinder 387 drives the knife holder 385 to drive the knife pressing plate 386 to move relative to the fixed knife 382, when the length of the positive plate material belt 01 fed to the winding needle 21 at the winding position reaches a preset length, the positive plate material belt 01 is cut, so that the front end portion of the positive plate material belt 01 is cut into positive plates 02 with the preset length, and when the length of the positive plate material belt 01 fed to the winding needle 21 reaches the preset length, the positive plate material belt 01 is cut.

In order to cut the first material strip 06 from the corresponding gummed paper 07, referring to fig. 2 and 10, in some embodiments, the cutting mechanism 700 includes a mounting base 71 fixedly connected with the panel 100, at least one fourth linear guide 72 extending along the length direction of the mounting base 71 is provided on the mounting base 71, a cutting seat 73 is hung on a sliding block of the fourth linear guide 72, the cutting seat 73 is further in transmission connection with a fourth transmission component 74 provided on the mounting base 71, one side of the cutting seat 73 matching with the extending direction of the fourth linear guide 72 is provided with a cutting unit 75 and an auxiliary pressing roller unit 76, the auxiliary pressing roller unit 76 is arranged vertically to the cutting seat 73 and fixedly connected with the cutting seat 73, the cutting unit 75 is arranged vertically to the cutting seat 73 and movably connected with the cutting seat 73, the cutting unit 75 is also movably connected with the auxiliary pressing roller unit 76 through an adjustable nut 77, wherein,

And an adjustable nut 77 for rotating and adjusting the distance between the cutting unit 75 and the auxiliary pressing roller unit 76, so that the cutter pressing roller 751 of the cutting unit 75 and the lower pressing roller 761 of the auxiliary pressing roller unit 76 press the first material belt 06 at a preset distance.

The fourth transmission component 74 is used for transmitting the cutting seat 73 to drive the auxiliary pressing roller unit 76 and the cutting unit 75 to move along the fourth linear guide rail 72 so as to cut the first material belt 06 pressed by the cutter pressing roller 751 and the lower pressing roller 761 through the diaphragm cutter 752 of the cutting unit 75.

In the present embodiment, the fourth transmission assembly 74 satisfying the sliding of the transmission cutting seat 73 along the fourth linear guide 72 is suitable for the fourth transmission assembly according to the embodiment of the present application, for example: the fourth drive assembly 74 may be a drive cylinder or a linear motor.

In this embodiment, when the cutting mechanism 700 cuts the first material strip 06 by the diaphragm cutter 752, the first end portion of the first material strip 06 and the second end portion of the first material strip 06 passing through the tail pressing mechanism 800 need to be clamped by the head pressing mechanism 600, so that the diaphragm cutter 752 is aligned with the first material strip 06 where the gummed paper 07 is disposed for welding and cutting.

In order to push the positive sheet material belt 01 to the second separator material belt 03 closely attached to the first material belt 06, referring to fig. 2 to 4, fig. 6 and fig. 11, in some embodiments, the positive film combining assembly 52 includes a bottom plate 521 connected to the panel 100, third linear guide rails 522 extending along a length direction of the bottom plate 521 are disposed on the bottom plate 521, a follower plate 523 is spanned on the two third linear guide rails 522 disposed at intervals, the follower plate 523 is in transmission connection with a third transmission assembly 524 disposed between the two third linear guide rails 522, and a top roller 525 disposed on the follower plate 523 is further disposed on the follower plate 523, where the third transmission assembly 524 transmits the follower plate to drive the top roller to slide along the third linear guide rails 522 so as to push the positive sheet material belt 01.

In this embodiment, the third transmission assembly 524 satisfying the sliding of the transmission follower plate 523 along the third linear guide 522 is suitable for the third transmission assembly according to the embodiment of the present application, for example: the third transmission assembly 524 may be a ball screw module or a screw sled module.

In this embodiment, one end of the positive electrode sheet material tape 01 is tightly attached to the second separator material tape 05 of the first material tape 06 under the action of the top roller 525, and meanwhile, the front end of the positive electrode sheet material tape 01 is also propped up to the vertical downward direction, so that the positive electrode sheet material tape 01 can conveniently penetrate into the winding channel 201 of the winding needle 21.

For winding the lithium battery, referring to fig. 2 to 6 and 12, in some embodiments, the winding mechanism 200 includes a revolution assembly 22, the revolution assembly 22 includes a base seat 24 fixed on a winding base 23, a base turntable 25 is assembled on the base seat 24 through a bearing (not shown in the drawings), the base turntable 25 is nested with two winding pins 21 capable of being inserted and withdrawn along an axial direction of the base turntable 25, the base turntable 25 is further in transmission connection with a fifth driving assembly (not shown in the drawings), wherein,

and a fifth driving assembly for driving the substrate turntable 25 to revolve relative to the substrate seat 24 and for alternately rotating the two winding pins 21 between the winding position and the blanking position.

In the present embodiment, the fifth driving assembly, which is not shown in the drawings, does not constitute an unclear limitation of the winding mechanism 200 according to the embodiment of the present application, and it is understood that the winding mechanism 200 may be any winding mechanism capable of winding a lithium battery in the art, and it is only required to set two winding pins 21 capable of being inserted and removed in the axial direction of the base turntable 25.

When the winding needle 21 rotates to a winding position along with the substrate turntable 25, the winding needle extends along the axial direction of the substrate turntable 25, so that the first material belt 06 pulled forward by the winding needle 21 rotating to a blanking position and the positive electrode sheet material belt 01 fed to the winding needle 21 penetrate the needle, the needle penetration is completed at the corresponding winding needle 21, the first material belt 06 is cut off from the corresponding gummed paper 07 by the cutting mechanism 700, the first end is clamped by the matched head pressing mechanism 600, and the positive electrode sheet material belt 01 fed by the first material belt 06 and the positive electrode feeding mechanism 300 is wound by taking the negative electrode sheet material belt 04 to the positive electrode sheet material belt 01 direction as a winding direction; the winding needle 21 is withdrawn in the axial direction of the base turntable 25 to perform stripping when rotating with the base turntable 25 to the blanking position.

To achieve unreeling of the separator and the positive electrode sheet and to complete continuous reeling of the lithium battery, referring to fig. 1 to 13, in some embodiments, the positive electrode feeding mechanism 300 is further abutted against the positive electrode sheet unreeling mechanism 900 that unreels the positive electrode sheet material tape 01 to the positive electrode feeding mechanism 300, the reeling needle 21 at the reeling position is further abutted against the first separator unreeling mechanism 110 that unreels the first separator material tape 05 to the reeling needle 21 and the second separator unreeling mechanism 120 that unreels the second separator material tape 03 to the reeling needle 21, wherein,

the positive plate unreeling mechanism 900, the first diaphragm unreeling mechanism 110 and the second diaphragm unreeling mechanism 120 all comprise a second unreeling roller unit 91 and a plurality of second driven guide rollers 92, which are arranged on the panel 100, wherein the second unreeling roller unit 91 is used for correspondingly unreeling one of the positive plate material belt 01, the first diaphragm material belt 05 and the second diaphragm material belt 03 by being matched with the corresponding guide of the plurality of second driven guide rollers 92.

In this embodiment, the positive plate unwinding mechanism 900, the first diaphragm unwinding mechanism 110 and the second diaphragm unwinding mechanism 120 include, but are not limited to, the unwinding mechanisms shown in the drawings, and the positive plate unwinding mechanism 900, the first diaphragm unwinding mechanism 110 and the second diaphragm unwinding mechanism 120, which are capable of unwinding the corresponding material strips and conveying the corresponding material strips to the mechanism in butt joint with the corresponding material strips, can be used in the unwinding mechanism corresponding to the embodiment of the present application. The specific structures related to the corresponding unreeling mechanism are not limited to the positive electrode sheet unreeling mechanism 900, the first separator unreeling mechanism 110, and the second separator unreeling mechanism 120 in the embodiment of the present application.

To effect the clamping of the first end of the first web 06, in some alternative embodiments, the head press mechanism 600 includes a film abutment roller 61 and a cutting press roller 62 disposed side by side, the film abutment roller 61 and the cutting press roller 62 clamping the first end of the first web 06 exiting along the winding path 201.

To effect the clamping of the second end of the first web 06, in some alternative embodiments, the tail press mechanism 800 includes a tail press roller 81 and a lower press roller 82 disposed side-by-side, the tail press roller 81 and the lower press roller 82 being oppositely clamped through the second end of the first web 06 of the tail press mechanism 800.

The embodiment of the application also provides a winding method, which is implemented by using the lithium battery continuous winding machine in the embodiment, and comprises the following steps:

and S1, in the process that the winding needle positioned at the winding position rotates to the blanking position, the winding needle is utilized to pull the first diaphragm material belt, the negative electrode sheet material belt and the second diaphragm material belt which are continuously discharged forwards.

S2, utilizing a negative electrode feeding mechanism, cutting the negative electrode continuous material belt after unreeling the negative electrode continuous material belt for a preset length, connecting adjacent negative electrode plates by using gummed paper to form a negative electrode plate material belt after the negative electrode plates cut later are arranged at intervals, and continuously unreeling the negative electrode plate material belt to a reeling channel of a reeling needle at a reeling position in cooperation with limit of a negative electrode guide roller;

S3, guiding the first diaphragm material belt to be tightly attached to the negative electrode sheet material belt through a fixed film-combining roller, and pushing the positive electrode sheet material belt to be tightly attached to the second diaphragm material belt through a positive electrode film-combining assembly, so that the positive electrode sheet material belt and the first material belt are arranged in a winding channel in a penetrating manner after a winding needle at a winding position penetrates through a needle;

s4, extending a winding needle positioned at a winding position, and continuously passing a first material belt through a winding channel of the winding needle;

step S5, pulling the first material belt of the threading needle by utilizing a coil positioned at the blanking position, and clamping the first end part of the first material belt penetrating out along the winding channel by utilizing the head pressing mechanism and clamping the second end part of the first material belt penetrating through the tail pressing mechanism by utilizing the tail pressing mechanism;

s6, cutting the first material belt from the corresponding gummed paper by using a cutting mechanism;

and S7, feeding the positive plate material belt into a winding channel of a winding needle positioned at a winding position by utilizing a positive plate feeding mechanism.

And S8, winding the positive plate material belt fed by the first material belt and the positive plate material feeding mechanism clamped at the first end by the head pressing mechanism by taking the direction of the negative plate material belt to the positive plate material belt as the winding direction by using a winding needle positioned at the winding position, wherein when the length of the positive plate material belt fed into a winding channel of the corresponding winding needle reaches a preset length, the positive plate material belt is cut by using the positive plate material feeding mechanism.

In the embodiment, the first diaphragm material belt is guided to be tightly attached to the negative electrode sheet material belt by adopting the fixed film-combining roller, and the first material belt is formed by stacking the negative electrode sheet material belt between the first diaphragm material belt and the second diaphragm material belt, and the first material belt is clamped by the winding needle to continuously pass through the winding channel of the winding needle during winding, so that direct winding can be performed, diaphragm pre-winding is not needed, and the time for pre-winding the head of the diaphragm is saved; the positive plate material belt is pushed to be tightly attached to the second diaphragm material belt through the positive plate membrane assembly, so that the quick needle threading of the winding needle is facilitated; in addition, by adopting a mode of connecting adjacent negative plates by using adhesive paper, when a cutting mechanism is adopted for cutting, cutting is carried out from the adhesive paper, and the negative plates in cutting are protected by the adhesive paper, so that burrs are prevented from being generated at the head parts of the negative plates; moreover, the first end is clamped by the head pressing mechanism, and when the lithium battery is wound, the first end is reversely stuck tightly to wrap the winding needle, so that the head of the lithium battery is prevented from being folded.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The lithium battery continuous winding machine is characterized by comprising a panel, wherein a winding mechanism, a positive electrode feeding mechanism, a negative electrode feeding mechanism, a film combining mechanism, a head pressing mechanism, a cutting mechanism and a tail pressing mechanism are arranged on the panel in sequence around the winding mechanism,

the positive electrode feeding mechanism is used for feeding the positive electrode sheet material belt to a winding needle corresponding to the winding mechanism in cooperation with limit of the positive electrode guide roller, and cutting the positive electrode sheet material belt when the positive electrode sheet material belt is fed for a preset length;

the negative electrode feeding mechanism is used for cutting the continuous negative electrode sheet material strip after the continuous negative electrode sheet material strip is unreeled for a preset length, connecting adjacent negative electrode sheets by using gummed paper to form a negative electrode sheet material strip after the cut negative electrode sheets are arranged at intervals, and continuously discharging the negative electrode sheet material strip to a winding channel of the winding needle at a winding position in cooperation with limit of a negative electrode guide roller;

The film combining mechanism comprises a fixed film combining roller and a positive film combining component, wherein the fixed film combining roller is used for guiding a first diaphragm material belt of a first material belt to the negative plate material belt which is tightly attached to the first material belt, and the positive film combining component is used for pushing the positive plate material belt to a second diaphragm material belt which is tightly attached to the first material belt, so that after the winding needle at a winding position penetrates through the needle, the positive plate material belt and the first material belt penetrate into the winding channel;

the cutting mechanism is used for cutting the first material belt from the corresponding gummed paper when the head pressing mechanism clamps the first end part of the first material belt penetrating along the winding channel and the tail pressing mechanism clamps the second end part of the first material belt penetrating;

the winding needle is positioned at the winding position and is used for winding the first material belt clamped at the first end part by the head pressing mechanism and the positive plate material belt fed by the positive feeding mechanism by taking the direction of the negative plate material belt to the positive plate material belt as the winding direction.

2. The continuous lithium battery winding machine according to claim 1, wherein the negative electrode feeding mechanism comprises a negative electrode sheet unreeling mechanism, a electrode sheet guide roller, and a cutting and rubberizing mechanism, the cutting and rubberizing mechanism being disposed between the negative electrode sheet unreeling mechanism and the winding mechanism, wherein,

The negative plate unreeling mechanism comprises a first unreeling roller unit and a plurality of first driven guide rollers, wherein the first unreeling roller unit and the plurality of first driven guide rollers are arranged on the panel, the plurality of first driven guide rollers are arranged along a set unreeling direction, and the first unreeling roller unit is used for unreeling the continuous negative plate material belt to the cutting rubberizing mechanism through being matched with the corresponding guide of the plurality of first driven guide rollers;

the cutting and rubberizing mechanism is used for cutting the continuous material belt of the negative electrode plate after unreeling the continuous material belt of the negative electrode plate for a preset length, connecting the adjacent negative electrode plates with gummed paper to form a material belt of the negative electrode plate after the spacing arrangement of the negative electrode plates cut in advance, and continuously discharging the material belt of the negative electrode plate to the reeling channel of the reeling needle at the reeling position in cooperation with the corresponding guide of the electrode plate guide roller and the limit of the negative electrode guide roller.

3. The continuous lithium battery winding machine of claim 2, wherein the cutting and rubberizing mechanism comprises a first pole piece cutting assembly and a paste adhesive assembly in butt joint with the first pole piece cutting assembly, wherein,

the first pole piece cutting assembly comprises a first cutter base which is perpendicular to the panel, the first cutter base is connected with an upper cutter holder through a ball screw, the upper cutter holder is connected with an upper pressing cutter through a first guide post and an elastic piece, the upper cutter holder is further in transmission connection with a first driving unit arranged on the first cutter base, the first cutter base is further provided with a second driving unit which is in transmission connection with a cutting knife, the cutting knife is further arranged opposite to the upper pressing cutter, the first driving unit transmits the upper pressing cutter to move towards the cutting knife which is driven to move by the second driving unit, so that the continuous material belt of the negative pole piece passing through the first pole piece cutting assembly is cut according to a preset length;

The rubberizing and standby assembly comprises two rubberizing units which are arranged oppositely and two standby rubberizing units which are arranged oppositely, wherein the rubberizing units comprise a first support fixedly connected with the panel, rubberizing sliding seats capable of sliding are hung on truss plates of the first support, the rubberizing sliding seats are connected with vacuum adsorption rubberizing knives through guide rods, the vacuum adsorption rubberizing knives are also in transmission connection with rubberizing driving units arranged on the rubberizing sliding seats, the rubberizing sliding seats drive the vacuum adsorption rubberizing knives to be arranged oppositely to the standby rubberizing units, the vacuum adsorption rubberizing knives are driven by the rubberizing driving units to move towards the cut negative electrode plates so as to fix the rubberizing papers conveyed to the vacuum adsorption rubberizing knives through the vacuum adsorption, and adjacent negative electrode plates in the negative electrode plates which are arranged at intervals are rubberized and connected through the rubberizing papers cut by the corresponding standby rubberizing units; the glue preparation unit comprises a second support fixedly connected with the panel, and a glue unreeling unit, a glue pressing unit and a glue cutting unit which are sequentially arranged on the second support, wherein the glue unreeling unit is used for unreeling a glue strip towards the glue pressing unit and the glue cutting unit, a glue pressing driving unit of the glue pressing unit moves towards the unreeling glue strip through a pressing block connected with the glue pressing driving unit of the glue pressing unit in a transmission manner so as to press the glue strip to move and enable the unreeling glue strip to stop conveying, and a cutting driving unit of the glue cutting unit moves towards the glue strip feed through a vacuum cutting knife connected with the glue cutting unit in a transmission manner, and cooperates with the vacuum adsorption fixation of the vacuum adsorption glue cutting knife of the glue pasting unit and the compression of the glue pressing unit on the glue strip so as to cut corresponding glue.

4. The continuous lithium battery winding machine according to claim 1, wherein the positive electrode feeding mechanism comprises a mounting plate connected with the panel, a first linear sliding rail extending along the length direction of the mounting plate is arranged on the mounting plate, a first sliding seat and a second sliding seat are arranged on the first linear sliding rail, a first transmission component in transmission connection with the first sliding seat and a second transmission component in transmission connection with the second sliding seat are also arranged on the mounting plate, a sheet feeding clamp component is arranged on the first sliding seat, a second sheet cutting component in movable butt joint with the sheet feeding clamp component is arranged on the second sliding seat, wherein,

the first transmission assembly is used for transmitting the first sliding seat to drive the sheet feeding clamp assembly to face the second electrode sheet cutting assembly, so that the sheet feeding clamp assembly clamps the positive sheet material belt to move towards the second electrode sheet cutting assembly and feed sheets to the second electrode sheet cutting assembly;

the second transmission assembly is used for transmitting the second sliding seat to drive the second pole piece cutting assembly to move towards the winding needle at the winding position so as to deliver the positive pole piece material belt to the winding needle at the winding position, and when the length of the delivered positive pole piece material belt reaches the preset length, the positive pole piece material belt is cut off, and then the positive pole piece with the preset length is cut.

5. The continuous lithium battery winding machine according to claim 4, wherein the sheet feeding clamp assembly comprises a first mounting plate which is in sliding connection with the first sliding seat, a first fixing block is arranged on one side of the width direction of the first mounting plate, the first fixing block is connected with a first movable block which is opposite to the first fixing block through a first guide pillar, a pressing roller is arranged on the end face of the first fixing block which is opposite to the first movable block, a fixed sheet feeding clamp which extends towards the second sheet cutting assembly is fixedly arranged on the side end face of the thickness direction of the first fixing block, a dynamic pressure roller which is opposite to the pressing roller in the arrangement position is arranged on the first movable block, a movable sheet feeding clamp which is opposite to the fixed sheet feeding clamp is fixedly connected with the first movable block, one end of the first guide pillar, which is far away from the first movable block, is connected with the linkage block, and the first movable block is in transmission connection with a first driving cylinder arranged on the first mounting plate;

the second pole piece cutting assembly comprises a second cutter base fixedly connected with the second sliding seat, a first cutter seat for installing a fixed cutter is fixedly arranged on the second cutter base, the second cutter base is connected with a movable cutter seat which is arranged opposite to the first cutter seat through a second guide post, a cutter pressing plate is arranged at the position, opposite to the fixed cutter, of the movable cutter seat, and the movable cutter seat is also in transmission connection with a second driving cylinder arranged on the side wall of the second cutter base;

The first transmission assembly and the second transmission assembly include one of: ball screw module and lead screw slip table module.

6. The continuous lithium battery winding machine according to claim 1, wherein the cutting mechanism comprises a mounting base plate fixedly connected with the panel, at least one fourth linear guide rail extending along the length direction of the mounting base plate is arranged on the mounting base plate, a cutting seat is hung on a sliding block of the fourth linear guide rail and is further in transmission connection with a fourth transmission component arranged on the mounting base plate, a cutting unit and an auxiliary compression roller unit are arranged on one side of the cutting seat, which is matched with the extending direction of the fourth linear guide rail, the auxiliary compression roller unit is perpendicular to the cutting seat and fixedly connected with the cutting seat, the cutting unit is perpendicular to the cutting seat and is movably connected with the auxiliary compression roller unit, the cutting unit is further connected with the auxiliary compression roller unit through an adjustable nut,

the adjustable nut is used for rotating and adjusting the distance between the cutting unit and the auxiliary pressing roller unit so as to enable the cutter pressing roller of the cutting unit and the lower pressing roller of the auxiliary pressing roller unit to press the first material belt according to the preset distance;

The fourth transmission assembly is used for transmitting the cutting seat to drive the auxiliary press roller unit and the cutting unit to move along the fourth linear guide rail, so that the first material belt pressed by the cutter press roller and the lower press roller is cut by a diaphragm cutter of the cutting unit.

7. The continuous lithium battery winding machine according to claim 1, wherein the positive electrode membrane combining assembly comprises a bottom plate connected with the panel, third linear guide rails extending along the length direction of the bottom plate are arranged on the bottom plate, a follower plate is arranged on the third linear guide rails in a crossing mode at intervals, the follower plate is in transmission connection with a third transmission assembly arranged between the two third linear guide rails, a top roller perpendicular to the follower plate is further arranged on the follower plate, and the third transmission assembly is used for transmitting the follower plate to drive the top roller to slide along the third linear guide rails so as to correspondingly push the positive electrode sheet material belt.

8. The continuous lithium battery winding machine according to claim 1, wherein the winding mechanism comprises a revolution assembly comprising a base seat fixed on a winding base, a base turntable is assembled on the base seat through a bearing, the base turntable is nested with two winding needles capable of being inserted and pulled out along the axial direction of the base turntable, the base turntable is also in transmission connection with a fifth driving assembly, wherein,

The fifth driving assembly is used for driving the substrate turntable to revolve relative to the substrate seat and carrying the two winding needles to alternately rotate between a winding position and a blanking position;

when the winding needle rotates to the winding position along with the substrate turntable, the winding needle stretches out along the axial direction of the substrate turntable, so that the first material belt pulled forward by the winding needle rotating to the blanking position and the positive plate material belt fed to the winding needle penetrate through the winding needle, after the cutting mechanism cuts the first material belt from the corresponding gummed paper, the first material belt clamped at the first end part by the head pressing mechanism and the positive plate material belt fed by the positive plate feeding mechanism are wound in a winding direction by taking the negative plate material belt to the positive plate material belt direction; and the winding needle is retracted along the axial direction of the substrate turntable to remove the material when rotating along with the substrate turntable to the blanking position.

9. The continuous lithium battery winder as claimed in claim 1, wherein the positive electrode feeding mechanism further interfaces with a positive electrode sheet unwinding mechanism that unwinds the positive electrode sheet material tape to the positive electrode feeding mechanism, the winding needle in the winding position further interfaces with a first separator unwinding mechanism that unwinds the first separator material tape to the winding needle and a second separator unwinding mechanism that unwinds the second separator material tape to the winding needle, wherein,

The positive plate unreeling mechanism, the first diaphragm unreeling mechanism and the second diaphragm unreeling mechanism comprise a second unreeling roller unit and a plurality of second driven guide rollers which are arranged on the panel, and the second unreeling roller unit is used for correspondingly unreeling one of the positive plate material belt, the first diaphragm material belt and the second diaphragm material belt by being matched with the corresponding guide of the plurality of second driven guide rollers;

the head pressing mechanism comprises a film leaning roller and a cutting press roller which are arranged side by side, and the film leaning roller and the cutting press roller clamp the first end part of the first material belt penetrating out along the winding channel in pairs;

the tail pressing mechanism comprises a tail pressing roller and a lower pressing roller which are arranged side by side, and the tail pressing roller and the lower pressing roller oppositely clamp through the second end part of the first material belt of the tail pressing mechanism.

10. A winding method using the lithium battery continuous winding machine according to any one of claims 1 to 9, characterized in that the winding method comprises:

s1, in the process that the winding needle positioned at a winding position rotates to a blanking position, the winding needle is utilized to pull the first diaphragm material belt, the negative electrode sheet material belt and the second diaphragm material belt which are continuously discharged forwards;