CN201394626Y - Rolling device used for hydrosolvent negative pole lithium ion battery pole piece rolling machine - Google Patents
Rolling device used for hydrosolvent negative pole lithium ion battery pole piece rolling machine Download PDFInfo
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- CN201394626Y CN201394626Y CN2009200963691U CN200920096369U CN201394626Y CN 201394626 Y CN201394626 Y CN 201394626Y CN 2009200963691 U CN2009200963691 U CN 2009200963691U CN 200920096369 U CN200920096369 U CN 200920096369U CN 201394626 Y CN201394626 Y CN 201394626Y
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- pressure
- pole piece
- roller
- milling roller
- lithium ion
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Abstract
The utility model discloses a rolling device used for a hydrosolvent negative pole lithium ion battery pole piece rolling machine, which comprises an upper compacting roller and a lower compacting roller which are mounted on a machine frame, roll shafts are arranged on two sides of the upper and the lower compacting rollers, shaft sleeves are fixedly mounted on the roll shafts, an oblique iron isarranged between the shaft sleeve of the upper compacting roller and that of the lower compacting roller, a lower press cylinder fixedly mounted on the machine frame is connected below the shaft sleeve of the lower compacting roller, an upper press cylinder fixedly connected with the machine frame is connected below the shaft sleeve of the lower compacting roller, and the upper and the lower presscylinders are connected with a high-pressure hydraulic station. The device adopts the high-pressure hydraulic system and the dual-way pressure output, the high-pressure hydraulic system avoids the problem of unstable pressure caused by the low-pressure hydraulic system. With the adoption of the dual-way pressure output, the properties of NMP system rolling machine can be restored when the outputpressure of the upper hydraulic system is zero, thereby achieving the simultaneity of the NMP system and the hydrosolvent system on the identical rolling machine and achieving the dual-purpose.
Description
Technical field
The utility model relates to a kind of aqueous solvent negative electrode lithium ion battery pole piece roller, particularly a kind of rolling device of aqueous solvent negative electrode lithium ion battery pole piece roller.
Background technology
Advantages such as lithium ion battery has voltage height, specific energy height, recycles often, memory time is long, not only on portable electric appts, be used widely as mobile phone, DV and laptop computer, and be widely used in big-and-middle-sized electrical equipment aspects such as electric automobile, electric bicycle and electric tool, therefore more and more higher to performance, the cost requirement of lithium ion battery.The cathode pole piece of lithium ion battery use now has 2 types: aqueous solvent pole piece and NMP system pole piece, the aqueous solvent system is after negative plate that binding agent is made is assembled into lithium ion battery with water body, test its performance, with be that binding agent is compared with the PVDF/NMP system, battery is basic identical aspect cycle performance.Consumption will be lower than PVDF/NMP system (only comparing the amount of solid in the binding agent) when using the water solution system binding agent, this just makes corresponding being improved of amount of active material in the pole piece, increased battery capacity on the one hand, improved electrode conductivuty on the other hand, the test result of battery has shown that also resistance has had small size reduction.Environmental protection, cost are low because the aqueous solvent pole piece has, production process does not have advantages such as harm, production safety and more and more is subjected to everybody welcome to human body, progressively alternative now NMP system pole piece.It is the important procedure of battery production that pole piece rolls, and is important link in the lithium ion battery production process.The thickness of pole piece is very big for the performance impact of battery, if pole piece thickness is super thick, goes into shell and scratches utmost point group, forms potential safety hazard; If thickness is ultra-thin, the easy broken belt of pole piece, negative pole is analysed lithium easily, and the battery that makes is all scrapped.The aqueous solvent rolling method that adopts has two kinds at present, also have following shortcoming: one, use the roller of high pressure to roll, can cause the pole piece single face roll density and the two-sided density that rolls is inconsistent, the single face place that causes pole piece, it is low to roll density, the situation of the easy dry linting of pole piece; Two, use the roller of low-pressure to roll, can cause rolling in the process of pole piece unstable, pole piece rolls in the process because the fluctuation of pressure causes pole piece thick, thin uneven situation to occur, analyses the situation of lithium and occurs thereby cause battery to go into shell difficulty or battery.
Summary of the invention
The utility model provides a kind of rolling device of aqueous solvent negative electrode lithium ion battery pole piece roller for solving the technical problem that exists in the known technology, can stably export little roll gap pressure, can not cause the phenomenon of rolling pressure fluctuation because of low-pressure.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: a kind of rolling device of aqueous solvent negative electrode lithium ion battery pole piece roller, comprise rack-mounted milling roller and the following milling roller gone up, described both sides of going up milling roller and following milling roller are provided with roll shaft, be fixed with axle sleeve on the described roll shaft, be provided with wedge between the axle sleeve of described upward milling roller and the axle sleeve of following milling roller, the axle sleeve below of described milling roller down is connected with the pushing cylinder that is packed on the frame, it is characterized in that, the axle sleeve top of described milling roller down is connected with the last cylinder pressure affixed with frame, the described cylinder pressure of going up, pushing cylinder is connected with the high-pressure and hydraulic station.
The described cylinder pressure of going up is connected with independent Hydraulic Station.
It is described that upward cylinder pressure is affixed by the axle sleeve and the frame of last milling roller.
Advantage and the good effect that the utlity model has are: adopt the output of high-pressure hydraulic and bidirection press, high-pressure hydraulic has avoided because low-pressure hydraulic system build-up of pressure unsure state; The output of employing bidirection press when the output pressure of last hydraulic system is " 0 ", can revert to the characteristic of NMP system roller, has realized that the system of NMP system and aqueous solvent is carried out on same roller, has realized the purpose of dual-use.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1, following milling roller, 2, go up milling roller, 3, pushing cylinder, 4, axle sleeve, 5, roll shaft, 6, wedge, 7, go up cylinder pressure.
The specific embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1, the rolling device of a kind of aqueous solvent negative electrode lithium ion battery of the utility model pole piece roller, comprise rack-mounted milling roller 2 and the following milling roller 1 gone up, described both sides of going up milling roller 2 and following milling roller 1 are provided with roll shaft 5, be fixed with axle sleeve 4 on the described roll shaft 5, be provided with wedge 6 between the axle sleeve of described upward milling roller 2 and the axle sleeve of following milling roller 1, described axle sleeve 4 belows of milling roller 1 down are connected with the pushing cylinder 3 that is packed on the frame, described axle sleeve 4 tops of milling roller 1 down are connected with the last cylinder pressure 7 affixed with frame, the described cylinder pressure 7 of going up, pushing cylinder 3 is connected with the high-pressure and hydraulic station, and the maximum output pressure at described high-pressure and hydraulic station is 800～1000Kgf/cm.
For simplified structure, be convenient to control, last cylinder pressure 7 is connected with independent Hydraulic Station.
Describedly go up the structure that cylinder pressure 7 adopts on the axle sleeve 4 that is fixed on milling roller, last milling roller 2 is fixed on the frame of roller and makes overall structure compactness more.
To roll the aqueous solvent negative pole is example, supports with wedge between the upper and lower milling roller axle sleeve.Gap between two milling rollers is regulated with wedge, and regulated quantity is 10～100um; The upward pressure default is 400 ± 20Kgf/cm, the downforce default is 600 ± 20Kgf/cm, with the pressure of pressure system regulate finish after, the normal startup rolled, feed back the gap adjustment of carrying out milling roller by the thickness that rolls the back pole piece, to reach the pole piece thickness that needs.Be applicable to and roll the lithium ion negative pole aqueous solvent pole piece that thickness range is 80um～160um.
When prior art uses the little pressure system of single pressure to roll, because the instability of pressure system, cause the in uneven thickness of pole piece, the thickness extreme difference of pole piece reaches 15 microns in rolling 100 meters scope, and the requirement of the pole piece of battery design is 8 microns, pole piece can only be selected use, cause the waste of human and material resources, promoting the use of of restriction aqueous solvent, after using the roller that adopts this device, the thickness extreme difference that rolls 100 meters aqueous solvent cathode pole pieces is 4 microns, rolls process stabilization, does not have bad generation.
If produce the pole piece of NMP system with the roller that adopts this device, can be " 0 " with the upward pressure default, with the downforce default is 800Kgf/cm, pole piece thickness can be controlled in 4 microns the extreme difference scope equally, thereby reached the purpose of dual-use, increased the popularity that rolling apparatus uses.
Operation principle of the present utility model:
Overlap independently pressure system by two and form, the lower roller shaft that acts on milling roller simultaneously puts, and the downforce system carries out the effect of power from bottom to top; The upward pressure system carries out the effect of power from top to bottom, like this, by last, the pressure differential of following two pressure systems, reach aqueous solvent and rolled the low-pressure that needs, the gravity of pressure-lower roll self that the pressure that the pressure between the milling roller=milling roller downforce system produces-milling roller upward pressure system produces, go up like this, the downforce system uses high pressure system simultaneously, can not cause the phenomenon of rolling pressure fluctuation because of low-pressure system, simultaneously high pressure system is because the counteracting of last downforce, can stably export little roll gap pressure, reach the requirement that rolls of negative pole aqueous solvent system: the little pressure of stable output.
Generally, the pressure system of the roller of negative pole NMP system use need be exported the high pressure of 800Kgf/cm; The pressure system that the roller of negative pole aqueous solvent system uses need be exported the low-pressure of 200Kgf/cm.Adopt the upper and lower high pressure system that uses simultaneously of roller of the present utility model, scheme preferably: with the upward pressure default is 40% of high pressure system, with the downforce default is 60% of high pressure system, like this, pass through formula: the gravity of pressure-lower roll self that the pressure that the pressure between the milling roller=milling roller downforce system produces-milling roller upward pressure system produces, just in time can reach the pressure that the aqueous solvent negative pole needs, and the 40%-80% of high pressure system output is the pressure output of pressure system optimum.
Although in conjunction with the accompanying drawings preferred embodiment of the present utility model is described above; but the utility model is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not breaking away under the scope situation that the utility model aim and claim protect, can also make a lot of forms, these all belong within the protection domain of the present utility model.
Claims (3)
1. the rolling device of an aqueous solvent negative electrode lithium ion battery pole piece roller, comprise rack-mounted milling roller and the following milling roller gone up, described both sides of going up milling roller and following milling roller are provided with roll shaft, be fixed with axle sleeve on the described roll shaft, be provided with wedge between the axle sleeve of described upward milling roller and the axle sleeve of following milling roller, the axle sleeve below of described milling roller down is connected with the pushing cylinder that is packed on the frame, it is characterized in that, the axle sleeve top of described milling roller down is connected with the last cylinder pressure affixed with frame, and described upward cylinder pressure, pushing cylinder are connected with the high-pressure and hydraulic station.
2. the rolling device of aqueous solvent negative electrode lithium ion battery pole piece roller according to claim 1 is characterized in that, the described cylinder pressure of going up is connected with independent Hydraulic Station.
3. the rolling device of aqueous solvent negative electrode lithium ion battery pole piece roller according to claim 1 is characterized in that, described upward cylinder pressure is affixed by the axle sleeve and the frame of last milling roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200963691U CN201394626Y (en) | 2009-04-17 | 2009-04-17 | Rolling device used for hydrosolvent negative pole lithium ion battery pole piece rolling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200963691U CN201394626Y (en) | 2009-04-17 | 2009-04-17 | Rolling device used for hydrosolvent negative pole lithium ion battery pole piece rolling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201394626Y true CN201394626Y (en) | 2010-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200963691U Expired - Fee Related CN201394626Y (en) | 2009-04-17 | 2009-04-17 | Rolling device used for hydrosolvent negative pole lithium ion battery pole piece rolling machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN201394626Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111495969A (en) * | 2020-03-31 | 2020-08-07 | 天津力神电池股份有限公司 | Online adjustment monitoring system for line pressure of rolling machine |
-
2009
- 2009-04-17 CN CN2009200963691U patent/CN201394626Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111495969A (en) * | 2020-03-31 | 2020-08-07 | 天津力神电池股份有限公司 | Online adjustment monitoring system for line pressure of rolling machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100203 Termination date: 20120417 |