CN206878096U

CN206878096U - Calender device

Info

Publication number: CN206878096U
Application number: CN201720844113.9U
Authority: CN
Inventors: 李克强; 沈超强; 吴祖钰; 朱涛声; 徐永强; 刘振
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2017-07-12
Filing date: 2017-07-12
Publication date: 2018-01-12
Anticipated expiration: 2027-07-12

Abstract

The utility model provides a kind of calender device, and it includes：Lithium band unreeling structure, conveys lithium band to be rolled；Coating mechanism, for the surface coating sizing-agent in lithium band；And roller press mechanism, including the first stack and the second stack be arrangeding in parallel, and roll into the lithium band for having been coated with slurry between the first stack and the second stack.According in calender device of the present utility model, by being coated with one layer of slurry on the surface of lithium band to adjust the off-type force of lithium belt surface, and the surface that lithium band is coated with slurry directly can contact with the correspondence one in the first stack and the second stack, so as to save barrier film, cost is reduced.

Description

Calender device

Technical field

It the utility model is related to calendering formation field, more particularly to a kind of calender device.

Background technology

With the development of modern society, various intelligence equipments (mobile phone, notebook computer, flat board, electric car etc.) there has been It is widely applied.At the same time, client is also more and more stronger to the demand of heavy-duty battery.Lithium ion battery is due to energy density The advantage such as height, service life length, green non-pollution, security performance is widely used in consumer electronics product and electric automobile neck Domain.In terms of lithium battery energy density is improved, lithium technique is mended as one of key technology.

Existing benefit lithium technique needs lithium band being rolled into after lithium film the laminating surface to pole piece again, but if lithium band is straight Roll-in between two disk rollers is tapped into, lithium band can be caused, which to be bonded on disk roller, can not separate (the off-type force that lithium band is peeled off from disk roller It is excessive), therefore, two layers of barrier film of prior art generally use separates on two surfaces of lithium band with disk roller.Especially, roll The lithium film gone out needs to be fixed to wherein one layer of barrier film, in order to by lithium film transfer to pole piece.But barrier film typically can only It is intended for single use, so as to cause cost to improve, benefit reduces.

Utility model content

In view of problem present in background technology, the purpose of this utility model is to provide a kind of calender device, and it can be saved Barrier film is saved, reduces cost.

To achieve these goals, the utility model provides a kind of calender device, and it includes：Lithium band unreeling structure, it is defeated Send lithium band to be rolled；Coating mechanism, for the surface coating sizing-agent in lithium band；And roller press mechanism, including be arranged in parallel First stack and the second stack, and roll into the lithium for having been coated with slurry between the first stack and the second stack Band.

The beneficial effects of the utility model are as follows：

According in calender device of the present utility model, lithium band table is adjusted by being coated with one layer of slurry on the surface of lithium band The off-type force in face, and the surface that lithium band is coated with slurry can be directly corresponding with the first stack and the second stack one Contact, so as to save barrier film, reduces cost.

Brief description of the drawings

Fig. 1 is the schematic diagram according to an embodiment of calender device of the present utility model；

Fig. 2 is the schematic diagram according to another embodiment of calender device of the present utility model；

Fig. 3 to Fig. 5 is the schematic diagram of lithium band after the calender device of different embodiments rolls；

Fig. 6 is the schematic diagram that lithium band is transferred to pole piece after calender device of the present utility model rolls.

Wherein, description of reference numerals is as follows：

1 lithium band unreeling structure 2B gas exhausting valves

2 coating mechanism 2C output control valves

21 house the roller press mechanism of tank 3

The stack of 22 flow pump 31 first

The stack of 23 first pipeline 32 second

The barrier film of 24 coating head 4

The barrier film unreeling structure of 25 heater 5

The barrier film rolling-up mechanism of 26 controller 6

27 compressed gas source L lithium bands

28 second pipe S slurries

29 agitator P pole pieces

2A over-pressure control valve R disk rollers

Embodiment

Describe calender device of the present utility model in detail with reference to the accompanying drawings.

Referring to figs. 1 to Fig. 6, included according to calender device of the present utility model：Lithium band unreeling structure 1, is conveyed to be rolled Lithium band L；Coating mechanism 2, in surface coating sizing-agent S of the lithium with L；And roller press mechanism 3, including the first pressure be arrangeding in parallel Prolong the stack 32 of roller 31 and second, and roll between the first stack 31 and the second stack 32 and had been coated with slurry S Lithium band L.

According in calender device of the present utility model, by being coated with one layer of slurry S on surface of the lithium with L to adjust lithium band The off-type force on L surfaces, and lithium with L be coated with slurry S surface can directly with the first stack 31 and the second stack 32 The contact of correspondence one, so as to save barrier film, reduce cost.

Due to slurry S presence, so off-type force of the lithium with L surfaces is small, even if the surface that lithium is coated with slurry S with L is glued The surface for the correspondence one being connected in the first stack 31 and the second stack 32, lithium band L are also easy to and the first stack 31 With one separation of correspondence in the second stack 32.Lithium is corresponding with the first stack 31 and the second stack 32 one with L After separation, slurry S may be retained on lithium band L, it is also possible to the correspondence being adhered in the first stack 31 and the second stack 32 On one, the slurry S in correspondence one being adhered in the first stack 31 and the second stack 32 can for example pass through scraper Strike off.

According in calender device of the present utility model, the slurry S includes lubricating solid, lubricant, conductive agent and glued Tie agent.Wherein, the quality of the lubricating solid is the 55%~65% of the slurry S gross masses；The quality of the lubricant is The 30%~40% of the slurry S gross masses；The quality of the conductive agent is the 1%~4% of the slurry S gross masses；It is described The quality of binding agent is the 4%~10% of the slurry S gross masses.

The lubricating solid may include at least one of graphite, polytetrafluoroethylene (PTFE), boron nitride, fluorographite, ceramics；Institute Stating lubricant may include at least one of silicone oil, lithium base oil fat, fatty acid amide, silicic acid fat, machinery oil, synthetic fat；It is described Conductive agent may include acetylene black, conductive carbon black, carbon cellulose, CNT, Ketjen black, graphene；The binding agent may include Neoprene, polyethylene, polyurethane, polycarbonate resin, polyimides, sodium carboxymethylcellulose, waterglass, trimerization At least one of sodium phosphate, polyacrylamide, polyamide.

Can accurately it be adjusted by the ratio for the species for adjusting lubricating solid, lubricant, conductive agent and binding agent described Slurry S viscosity, so as to adjust off-type force of the lithium with L for being coated with slurry S.Specifically, a kind of slurry S can by 55% stone Ink, 35% dimethicone, 4% conductive carbon black and 6% polyethylene composition, this slurry S viscosity are reachable 18000mPa·s；Another slurry S can be by 58% boron nitride, 35% lithium base oil fat, 4% acetylene black and 3% carboxylic first Base sodium cellulosate forms, and this slurry S viscosity is up to 85000mPas；Another slurry S can by 57% fluorographite, 35% lithium base oil fat, 4% graphene and 4% polyimides composition, this slurry S viscosity is up to 112000mPa s；Another slurry S can be by 60% ceramics, 30% synthetic fat, 2% CNT and 8% polyurethane group Into this slurry S viscosity is up to 56000mPas.

According in calender device of the present utility model, referring to Figures 1 and 2, coating mechanism 2 includes：Tank 21 is housed, is housed There is slurry S；Flow pump 22；First pipeline 23, connection house tank 21 and flow pump 22；Coating head 24, be connected with flow pump 22 and It is relative with the lithium band L that unreeling structure 1 conveys with lithium；Heater 25, for warmed-up flow pump 22；And controller 26, controlling stream Measure pump 22 and heater 25.The slurry S housed inside tank 21 can be along the first pipeline 23 entrance flow pump 22, and controller 26 According to the output slurry S of demand modeling flow pump 22 amount, while controller 26 can also control the warmed-up flow pump 22 of heater 25, So that the slurry S inside flow pump 22 heats up and reaches suitable application viscosity；Slurry S is sent into coating head 24 by flow pump 22, Coating head 24 is in surface coating sizing-agent S of the lithium with L.

According in calender device of the present utility model, referring to Figures 1 and 2, coating mechanism 2 also includes：Compressed gas source 27； Second pipe 28, connection house tank 21 and compressed gas source 27；Agitator 29, it is arranged at and houses tank 21；Over-pressure control valve 2A, set On second pipe 28；Gas exhausting valve 2B, it is arranged on the first pipeline 23；And output control valve 2C, it is arranged on the first pipe On road 23, and it is located at gas exhausting valve 2B downstreams.Compressed gas source 27 can be by second pipe 28 to housing the slurry inside tank 21 Expect that S applies malleation, slurry S is pushed to flow pump 22.Over-pressure control valve 2A can adjust the pressure of the output of compressed gas source 27. Agitator 29 can stir the slurry S housed in tank 21, so as to discharge the air in slurry S, ensure the uniformity of slurry coating. Before the coating, if bubble in the first pipeline 23 be present, gas exhausting valve 2B is opened (now output control valve 2C is closed) And discharge bubble；Gas exhausting valve 2B be closed and output control valve 2C open when, slurry S by the first pipeline 23 simultaneously Into flow pump 22.Coating mechanism 2 also includes host computer, instruction over-pressure control valve 2A, gas exhausting valve 2B and output control valve The component workings such as 2C.

In the embodiment according to calender device of the present utility model, reference picture 1, coating mechanism 2 be two groups, respectively with Two surfaces of the lithium with L are relative, and two groups of coating sizing-agent S of coating mechanism 2 viscosity difference is (by the composition, the temperature that adjust slurry S The conditions such as degree).Two groups of coating mechanisms 2 are respectively in two surface coating sizing-agent Ss of the lithium with L, so lithium band L can be directly entered the Without barrier film between one stack 31 and the second stack 32, so as to reduce cost；And because two groups of coating mechanisms 2 apply Cloth slurry S viscosity is different, so off-type force of the lithium with two surfaces of L is different, so the lithium band after calendering can be bonded in one On stack (the first stack 31 or the second stack 32).Specifically, reference picture 3, lithium are relative with the first stack 31 with L The off-type force on surface is big, so the lithium band L after calendering can be bonded on the first stack 31, and due to slurry S presence, lithium band L is easy to separate with the first stack 31.Reference picture 6, it can will directly need the pole piece P of benefit lithium (by another disk roller R) The lithium band L on the first stack 31 is extruded, so as to which lithium band L is transferred directly on pole piece P, is shifted in the prior art so as to save Required barrier film.

In another embodiment according to calender device of the present utility model, reference picture 2, coating mechanism 2 is one group, is used for In a surface coating sizing-agent S of the lithium with L, and when lithium band L enters between the first stack 31 and the second stack 32, described one Individual surface is relative with the first stack 31；The calender device also includes：Barrier film 4, from the first stack 31 and the second calendering Passed through between roller 32 and separate the second stack 32 and another surface of lithium with L.Calender device of the present utility model is saved One layer of barrier film, reduces cost.

Wherein, barrier film 4 separates required off-type force with another the described surface of lithium with L more than described one of lithium with L Individual surface separates required off-type force with the first stack 31.Reference picture 5, the first stack 31 and the second stack 32 will isolation Film 4 is integrated with lithium band L calenderings, and the surface that lithium scribbles slurry S with L is bonded on the first stack 31；When barrier film 4 is from When being passed between one stack 31 and the second stack 32, lithium band L can be separated with the first stack 31 and is fixed on barrier film 4 On.Be fixed on barrier film 4 lithium band L can be moved to barrier film 4 next process (such as by lithium band L be transferred to pole Piece P).

Certainly, barrier film 4 separates required off-type force with another the described surface of lithium with L and might be less that lithium with L's One surface separates required off-type force with the first stack 31.Reference picture 4, the first stack 31 and the second stack 32 Barrier film 4 and lithium band L calenderings are integrated, and the surface that lithium scribbles slurry S with L is bonded on the first stack 31；Work as isolation When film 4 passes between the first stack 31 and the second stack 32, lithium band L can be separated with barrier film 4 and is fixed on the first pressure Prolong on roller 31.Due to slurry S presence, lithium band L is easy to separate with the first stack 31.Reference picture 6, it will directly can need The lithium band L on pole piece P (by another disk roller R) the first stacks 31 of extruding of lithium is mended, so as to which lithium band L is transferred directly into pole On piece P, required barrier film is shifted in the prior art so as to save.

According in calender device of the present utility model, reference picture 2, the calender device also includes barrier film unreeling structure 5 and barrier film rolling-up mechanism 6.Barrier film 4 on barrier film unreeling structure 5 is under the traction of barrier film rolling-up mechanism 6 Through roller press mechanism 3, and wind on barrier film rolling-up mechanism 6.

According in calender device of the present utility model, the first stack 31 and the second stack 32 are different in speed, I.e. the two is differential speed roll.

According in calender device of the present utility model, the calender device also includes：Drive mechanism, with the first stack 31 are connected.Drive mechanism can drive the first stack 31 to move, to adjust between the first stack 31 and the second stack 32 Gap.

Claims

A kind of 1. calender device, it is characterised in that including：

Lithium band unreeling structure (1), conveys lithium band (L) to be rolled；

Coating mechanism (2), for the surface coating sizing-agent (S) in lithium band (L)；And

Roller press mechanism (3), including the first stack (31) and the second stack (32) be arrangeding in parallel, and roll into the first pressure Prolong and had been coated with slurry (S) lithium band (L) between roller (31) and the second stack (32).
2. calender device according to claim 1, it is characterised in that the first stack (31) and the second stack (32) are Differential speed roll.
3. calender device according to claim 1, it is characterised in that the calender device also includes：Drive mechanism, with One stack (31) is connected.
4. calender device according to claim 1, it is characterised in that coating mechanism (2) includes：

Tank (21) is housed, contains slurry (S)；

Flow pump (22)；

First pipeline (23), connection house tank (21) and flow pump (22)；

Coating head (24), it is connected with flow pump (22) and relative with the lithium band (L) that unreeling structure (1) conveys with lithium；

Heater (25), for warmed-up flow pump (22)；And

Controller (26), control flow pump (22) and heater (25).
5. calender device according to claim 4, it is characterised in that coating mechanism (2) also includes：

Compressed gas source (27)；

Second pipe (28), connection house tank (21) and compressed gas source (27)；

Agitator (29), it is arranged at and houses tank (21)；

Over-pressure control valve (2A), it is arranged on second pipe (28)；

Gas exhausting valve (2B), it is arranged on the first pipeline (23)；And

Output control valve (2C), it is arranged on the first pipeline (23), and is located at gas exhausting valve (2B) downstream.
6. calender device according to claim 1, it is characterised in that coating mechanism (2) be two groups, respectively with lithium band (L) Two surfaces it is relative, and the viscosity of two groups of coating mechanism (2) coating sizing-agents (S) is different.
7. calender device according to claim 1, it is characterised in that

Coating mechanism (2) is one group, and for a surface coating sizing-agent (S) in lithium band (L), and lithium band (L) enters the first pressure When prolonging between roller (31) and the second stack (32), one surface is relative with the first stack (31)；

The calender device also includes：Barrier film (4), pass through and incite somebody to action between the first stack (31) and the second stack (32) Another surface of second stack (32) and lithium band (L) separates.
8. calender device according to claim 7, it is characterised in that another described table of barrier film (4) and lithium band (L) One surface that off-type force needed for the separation of face is more than lithium band (L) separates required off-type force with the first stack (31).
9. calender device according to claim 7, it is characterised in that another described table of barrier film (4) and lithium band (L) One surface that off-type force needed for the separation of face is less than lithium band (L) separates required off-type force with the first stack (31).
10. calender device according to claim 7, it is characterised in that the calender device also includes barrier film unreeling machine Structure (5) and barrier film rolling-up mechanism (6).