CN102442566A - Lithium battery diaphragm combination machine - Google Patents

Abstract

The invention relates to a lithium battery diaphragm combination machine, which comprises an unwinding device, rolling devices and a winding device. Four unwinding rollers are mounted on an unwinding frame, a transition roller is arranged at the rear end of each unwinding roller, two groups of rolling devices are mounted on a rolling frame, each rolling device comprises a transition roller, an arc-shaped roller, a transition traction roller, a driving pressing roller and a main transmission roller, the driving pressing rollers and the main transmission rollers are used for rolling and compositing diaphragms, the rolling devices are mounted parallelly, and a third pressing roller is arranged outside the main transmission roller in one group for compositing the diaphragms. Four unwinding rollers are mounted the unwinding frame simultaneously, and the transition rollers, the arc-shaped rollers and the transition traction rollers of the rolling devices enable the lithium battery diaphragms to be fed in the driving pressing rollers and the main transmission rollers for rolling and compositing, so that the shortcomings of easiness in crimping and bubble generation during composition of the lithium battery diaphragms can be avoided, and lithium battery diaphragm composited layers can be wound flatly and conveniently by the aid of a traction roller group, an approaching roller group, a winding slide mechanism and a winding reel.

Description

The lithium battery diaphragm compounding machine

Technical field

The present invention relates to lithium battery diaphragm compounding machine equipment technical field, refer in particular to a kind of lithium battery diaphragm compounding machine here.

Background technology

In the structure of lithium cell; Barrier film is one of crucial interior layer assembly; The performance of barrier film has determined the interfacial structure, internal resistance of battery etc., directly influences the characteristics such as capacity, circulation and safety performance of battery, and the barrier film of excellent performance has important effect to the Combination property that improves battery.Barrier film adopts plastic film to process, and can isolate battery plus-negative plate, to prevent short circuit; Can also when battery is overheated, intercept the conduction of current in the battery through the closed pore function.The description of the popular point of barrier film is exactly the pory plastic sheeting of one deck; It is the highest a kind of high added value material of technology barriers in the lithium electric material; Account for the 20%-30% of lithium cell cost; The major cause that barrier film holds at high price is that some gordian techniquies of making barrier films are monopolized by the Japan and the U.S., and the homemade barrier film particularly index of high-end barrier film does not also reach the level of external product.

The membrane technique difficult point is the engineering branch art and the basis material of pore-creating.Wherein the engineering technology of pore-creating comprises barrier film pore-creating technology, production facilities and product stability.The basis material of barrier film comprises and gathers third bright, polythene material and additive.The barrier film production technology can be divided into two big types according to dry method and wet method at present, and dry method can be subdivided into unilateral stretching technology and stretch processes again simultaneously.Dry method unilateral stretching technology is through producing the method for hard elastic fibre, prepare the high oriented polypropylene or the polyethylene foil of low-crystallinity, obtaining the oriented film of high-crystallinity at high temperature annealing.The first formation microdefect that stretches at low temperatures of this film makes defective draw back, form micropore then under the high temperature.This technology is very ripe in the U.S., Japan through the development of decades, and this arts demand equipment is very complicated, equipment precision requirement is very high, and whole technology is quite complicated, and the control difficulty is high.The barrier film micropore of producing requires size, it is all very even to distribute, and the micropore conduction is good, can produce the barrier film of different-thickness, can adopt PP, PE material to produce.Because gordian technique is grasped in Japan and u s company, domestic manufacturer does not also grasp this technology, does not therefore also process the specialized equipment of this product.

Wet method is claimed phase separation method or thermally induced phase separation again.High boiling hydrocarbon liquids or low the branch in the material of amount are mixed with polyolefin resin, heat and dissolve solvate and be layered on melt on the thin slice, lowering the temperature then is separated, again with vertical or black soy sauce to the time thin slice do orientation process.Use highly volatile solvent extraction liquid at last.Can prepare the microporous membrane material of mutual perforation.Barrier film with the production of wet method bidirectional extending method has higher vertical and horizontal intensity owing to passed through biaxial tension.Be mainly used in single layer PE barrier film at present.This arts demand equipment is also very complicated, whole process flow is quite complicated, and cost is high, energy consumption is big, but the barrier film pore size of producing, distributes very evenly, and the micropore conduction is good, produces thin barrier film easily, can adopt the PE material to produce.

At present; Domestic employing barrier film processing technology is a stretch processes; Through in polypropylene, adding crystal formation improver with nucleation, utilize the difference of density between the different phases of polypropylene, crystal transfer takes place in drawing process form micropore; Be used to produce individual layer PP film, perhaps adopt common PP blow molding process to process.As a complete unit; The battery diaphragm of domestic production, pore size, distribute all comparatively inhomogeneous, and poor stability; In order to reach micropore comparatively uniformly; Usually way is laminated diaphragm to be carried out compound, can obtain thicker battery diaphragm, can arrive the basic demand of battery diaphragm technology, in can satisfying, low side battery production needs.

Barrier film carries out compound, needs to adopt the specialized equipment compounding machine to unreel roll-in, rolling.At present, lithium battery diaphragm compounding machine on the market, it is compound to realize that laminated diaphragm carries out; And in the process of unreeling, its card unreels axis can only single clamping paper web or work durm, in use; The axis that unreels of change work durm or paper web maybe be needed, a lot of inconveniences can be produced during use; When roll-in and rolling, and in the roll-in process, barrier film is easy to wrinkling, gassing, and it is relatively poor to process the barrier film planeness, can not satisfy the requirement of battery diaphragm.

Summary of the invention

The present invention is directed to the prior art deficiency, but the unwinding device of the battery diaphragm compounding machine of a kind of general-duty paper web or work durm is provided.

Lithium battery diaphragm compounding machine provided by the invention, the lithium battery diaphragm compounding machine, it comprises unwinding device, rolling device and wrap-up; They are installed in respectively and unreel on frame, roll-in frame and the rolling frame, unreel four let off roll are installed on the frame, are provided with transition roller in each let off roll rear end; Two groups of rolling devices are installed on the roll-in frame, and rolling device comprises transition roller, bowed roller, transition nip rolls, initiative compression roller and main drive roller, wherein; Transition roller; Barrier film is imported, and change barrier film importing angle, barrier film is sent into bowed roller; Bowed roller, barrier film is open and flat, be provided with control hand wheel, to change the radian that barrier film passes arc wheel; The transition nip rolls are made up of two running rollers, are provided with magnetic-powder clutch, with the roll-in tension force of control barrier film; Initiative compression roller and main drive roller are compound with the barrier film roll-in, and rolling device adopts a type parallel construction to install, and one group main drive roller peripheral hardware the 3rd pressure roller carries out barrier film compound therein.

Described let off roll is provided with that a left side unreels axis and the right side unreels axis; The left and right axis that unreels is made up of rotating shaft, bearing, clamping head, axis lateral driver device; Bearing installation is unreeling frame, and rotating shaft is installed on the bearing, outside unreeling frame, is provided with lateral driver device; Promote rotating shaft to unreeling the frame internal motion, but clamping barrier film reel; The clamping head is installed and is unreeled the inboard roller end of frame; The clamping head comprises paper roll clamping shaft part, iron volume clamping shaft part; The all sides of paper roll clamping shaft part axle are provided with spline; Establish the clamping key on the iron volume clamping shaft part, iron volume clamping shaft part end diameter is slightly smaller than iron volume clamping shaft part inside diameter, and paper roll clamping shaft part end diameter is slightly smaller than paper roll clamping shaft part inside diameter.

Described wrap-up laterally is installed on the rolling frame; It comprises the nip rolls group, near roller group, rolling slide mechanism and rolling spool group; The rolling slide mechanism includes motor and motor-driven change speed gear box, by change speed gear box driven rotary screw rod, rolling slide shaft and rolling strut bar; Cover divides the horizontal left-handed nut of laying, horizontal right handed unt in the position of rotary screw right ends; Be provided with the rolling slide shaft at rotary screw two side positions; End positions is arranged with the rolling cliding seat on the rolling slide shaft, and rolling cliding seat, horizontal left-handed nut, horizontal right handed unt are fixedly mounted on the rolling strut bar, cooperates horizontal left-handed nut, horizontal right handed unt to drive the slip of rolling strut bar by the rotary screw rotation.

Described rolling spool group is installed on the rolling strut bar, and described rolling spool group comprises left Scroll and right Scroll, and left Scroll comprises winding motor, power wheel, transmission shaft and Winding Machine dop; The Winding Machine dop is installed on the transmission shaft, and transmission shaft is installed on the rolling strut bar through bearing seat, and power wheel is installed on the transmission shaft simultaneously; Driven by winding motor, right Scroll comprises mechanical plug, slide-bar, slide-bar seat and cylinder, and the slide-bar seat is installed on the rolling strut bar; Slide-bar is installed in the slide-bar seat; Axle head is installed mechanical plug in the slide-bar, and the slide-bar axially outer end links to each other with cylinder piston, and cylinder is installed on the slide-bar seat.

Described near the air supporting constant pressure arrangement is installed on the roller group.

Beneficial effect of the present invention is: the present invention unreels 4 unwinding devices is installed on the frame simultaneously; And the transition roller through rolling device, bowed roller, transition nip rolls are sent lithium battery diaphragm into initiative compression roller and main drive roller, and to carry out roll-in compound; It is wrinkling easily to overcome the lithium battery diaphragm compound tense; The gassing shortcoming, and through the nip rolls group, near roller group, rolling slide mechanism and rolling spool group easily with the smooth rolling of lithium battery diaphragm composite bed.

Description of drawings:

Fig. 1 is a structural representation of the present invention

Fig. 2 is the structure enlarged diagram of let off roll of the present invention

Fig. 3 is the structural representation of wrap-up of the present invention

The specific embodiment:

Below be merely preferred embodiment of the present invention, do not limit protection scope of the present invention with this.

See lithium battery diaphragm compounding machine shown in Figure 1, provided by the invention, it comprises unwinding device 1, rolling device 2 and wrap-up 3; They are installed in respectively and unreel onframe 10, roll-in frame 20 and the rolling frame 30, unreel four let off roll 11 are installed on theframe 10, are provided with transition roller 21 in each let off roll 11 rear end; Two groups of rolling devices 2 are installed on roll-in frame 20, and rolling device 2 comprises transition roller 21,bowed roller 22, transition nip rolls 23, initiative compression roller 24 and main drive roller 25, wherein; Transition roller 21; Barrier film 9 is imported, and change barrier film 9 importing angles, barrier film 9 is sent intobowed roller 22;Bowed roller 22, barrier film 9 is open and flat, be provided with control hand wheel 26, to change the radian that barrier film 9 passesarc wheel 22; Transition nip rolls 23 are made up of two running rollers, are provided with magnetic-powder clutch, with the roll-in tension force of control barrier film 9; Initiative compression roller 24 is compound with barrier film 9 roll-ins with main drive roller 25, and rolling device 2 adopts a type parallel construction to install, and one group main drive roller 25 peripheral hardwares the 3rd pressure roller 27 carries out barrier film 9 compound therein.

See shown in Figure 2; Described let off roll 11 is provided with a left side andunreels axis 13 andunreel axis 14 with the right side, and the left andright axis 13,14 that unreels is made up of rotatingshaft 15, bearing, clamping 16, axislateral driver device 17, and bearing installation is unreeling on theframe 10;Rotating shaft 15 is installed on the bearing; Be provided withlateral driver device 17unreeling frame 10 outsides, promoterotating shaft 15 tounreeling frame 10 internal motions, but clamping barrier film reel 6.Clamping 16 installation unreel rotatingshaft 15 ends offrame 10 inboards; Clamping 16 comprises paper rollclamping shaft part 161, iron volumeclamping shaft part 162; Paper roll clampingshaft part axle 161 all sides are provided with spline; Establish the clamping key on the iron volumeclamping shaft part 162, iron volumeclamping shaft part 162 end diameter are slightly smaller than iron volumeclamping shaft part 162 inside diameter, and paper rollclamping shaft part 161 end diameter are slightly smaller than paper rollclamping shaft part 162 inside diameter.Wherein, the lateral driver device that the left end cardunreels axis 13 is a pneumatic cylinder, and thelateral driver device 17 that the right-hand member cardunreels axis 14 is manual rotary handle.

See shown in Figure 3; Described wrap-up 3 laterally is installed on the rolling frame 30; It comprisesnip rolls group 31,near roller group 32, rolling slide mechanism 4 and rolling spool group 5; Rolling slide mechanism 4 includes motor and motor-driven changespeed gear box 41, by changespeed gear box 41 drivenrotary screw rods 42, rolling slide shaft 43 and rolling strut bar 44; Cover divides and lays horizontal left-handed nut 45, horizontal right handed unt 46 in the position ofrotary screw 42 right ends, is provided with rolling slide shaft 43 at 42 liang of side positions of rotary screw, and end positions is arranged with rollingcliding seat 47 on rolling slide shaft 43; Rolling clidingseat 47, laterally left-handed nut 45, laterally right handed unt 46 is fixedly mounted on rolling strut bar 44, byrotary screw 42 rotations cooperate horizontal left-handed nut 45, laterally right handed unt 46 drives rolling strut bars 44 and slides; Described rolling spool group 5 is installed on the rolling strut bar 44, and described rolling spool group 5 comprises left Scroll and right Scroll, and left Scroll comprises windingmotor 51,power wheel 52,transmission shaft 53 andWinding Machine dop 54; 54 on Winding Machine card is installed on thetransmission shaft 53;Transmission shaft 53 is installed on the rolling strut bar 44 through bearing seat, andpower wheel 52 is installed on thetransmission shaft 53 simultaneously, is driven bywinding motor 51; Right Scroll comprises mechanical plug 56, slide-bar 57, slide-bar seat 58 andcylinder 59; Slide-bar seat 58 is installed on the rolling strut bar 44, and slide-bar 57 is installed in the slide-bar seat 58, and axle head is installed mechanical plug 56 in the slide-bar 57; Slide-bar 57 axially outer ends link to each other withcylinder 59 pistons, andcylinder 59 is installed on the slide-bar seat 58.Describedly air supporting constant pressure arrangement 8 is installed nearroller group 32 upper ends.

The present invention unreels 4 unwinding devices 1 is installed on the frame simultaneously; And the transition roller 21 through rolling device 2, bowedroller 22, transition nip rolls 23, lithium battery diaphragm is sent into initiative compression roller 24 and main drive roller 25, and to carry out roll-in compound; It is wrinkling easily to overcome the lithium battery diaphragm compound tense; The gassing shortcoming, and throughnip rolls group 31,near roller group 32, rolling slide mechanism 4 and rolling spool group 5 easily with the smooth rolling of lithium battery diaphragm 8 composite beds.

Claims (5)

1. lithium battery diaphragm compounding machine, it comprises unwinding device, rolling device and wrap-up, they are installed in respectively and unreel on frame, roll-in frame and the rolling frame; It is characterized in that, unreel four let off roll are installed on the frame, be provided with transition roller in each let off roll rear end; Two groups of rolling devices are installed on the roll-in frame, and rolling device comprises transition roller, bowed roller, transition nip rolls, initiative compression roller and main drive roller, wherein; Transition roller; Barrier film is imported, and change barrier film importing angle, barrier film is sent into bowed roller; Bowed roller, barrier film is open and flat, be provided with control hand wheel, to change the radian that barrier film passes arc wheel; The transition nip rolls are made up of two running rollers, are provided with magnetic-powder clutch, with the roll-in tension force of control barrier film; Initiative compression roller and main drive roller are compound with the barrier film roll-in, and rolling device adopts a type parallel construction to install, and one group main drive roller peripheral hardware the 3rd pressure roller carries out barrier film compound therein.

2. lithium battery diaphragm compounding machine according to claim 1; It is characterized in that: described let off roll is provided with that a left side unreels axis and the right side unreels axis, and the left and right axis that unreels is made up of rotating shaft, bearing, clamping head, axis lateral driver device, and bearing installation is unreeling frame; Rotating shaft is installed on the bearing; Be provided with lateral driver device unreeling the frame outside, promote rotating shaft to unreeling the frame internal motion, but clamping barrier film reel; The clamping head is installed and is unreeled the inboard roller end of frame; The clamping head comprises paper roll clamping shaft part, iron volume clamping shaft part; The all sides of paper roll clamping shaft part axle are provided with spline; Establish the clamping key on the iron volume clamping shaft part, iron volume clamping shaft part end diameter is slightly smaller than iron volume clamping shaft part inside diameter, and paper roll clamping shaft part end diameter is slightly smaller than paper roll clamping shaft part inside diameter.

3. lithium battery diaphragm compounding machine according to claim 1; It is characterized in that: described wrap-up laterally is installed on the rolling frame; It comprises the nip rolls group, near roller group, rolling slide mechanism and rolling spool group; The rolling slide mechanism includes motor and motor-driven change speed gear box, by change speed gear box driven rotary screw rod, rolling slide shaft and rolling strut bar; Cover divides the horizontal left-handed nut of laying, horizontal right handed unt in the position of rotary screw right ends, is provided with the rolling slide shaft at rotary screw two side positions, and end positions is arranged with the rolling cliding seat on the rolling slide shaft; Rolling cliding seat, horizontal left-handed nut, horizontal right handed unt are fixedly mounted on the rolling strut bar, cooperate horizontal left-handed nut, horizontal right handed unt to drive the slip of rolling strut bar by the rotary screw rotation.

4. lithium battery diaphragm compounding machine according to claim 3 is characterized in that: described rolling spool group is installed on the rolling strut bar, and described rolling spool group comprises left Scroll and right Scroll; Left side Scroll comprises winding motor, power wheel, transmission shaft and Winding Machine dop, and the Winding Machine dop is installed on the transmission shaft, and transmission shaft is installed on the rolling strut bar through bearing seat; Power wheel is installed on the transmission shaft simultaneously; Driven by winding motor, right Scroll comprises mechanical plug, slide-bar, slide-bar seat and cylinder, and the slide-bar seat is installed on the rolling strut bar; Slide-bar is installed in the slide-bar seat; Axle head is installed mechanical plug in the slide-bar, and the slide-bar axially outer end links to each other with cylinder piston, and cylinder is installed on the slide-bar seat.

5. lithium battery diaphragm compounding machine according to claim 3 is characterized in that: described near the air supporting constant pressure arrangement is installed on the roller group.

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