CN203437408U - Lithium ion battery pole piece grinding device - Google Patents
Lithium ion battery pole piece grinding device Download PDFInfo
- Publication number
- CN203437408U CN203437408U CN201320564063.0U CN201320564063U CN203437408U CN 203437408 U CN203437408 U CN 203437408U CN 201320564063 U CN201320564063 U CN 201320564063U CN 203437408 U CN203437408 U CN 203437408U
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- pressing roller
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- pole piece
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Abstract
The utility model discloses a lithium ion battery pole piece grinding device which comprises a pair of cold pressing rolls and a pair of hot pressing rolls arranged at the upstream position of the cold pressing rolls. The size relations between a hot pressing roll gap D1 and a cold pressing roll D2 is that D1 is larger than or equal to D2. Compared with the prior art, the lithium ion battery pole piece grinding device is a hot and cold grinding device which is of a four-roll structure. When the lithium ion battery pole piece grinding device performs hot pressing, a pole piece is heated to a certain temperature, so that the pole piece can be ground to a needed thickness with a small pressure, and extension of a diaphragm in the grinding process is reduced; the pole piece undergoes thickness shaping through cold pressing after the hot pressing, expansion rebound of the pole piece after rolling is reduced, and the problem of battery core deformation is effectively solved.
Description
Technical field
The utility model belongs to lithium ion battery and manufactures field, and more particularly, the utility model relates to a kind ofly can effectively prevent that pole piece from rolling the electrodes of lithium-ion batteries rolling device of rear expansion bounce-back.
Background technology
The preparation process of electrodes of lithium-ion batteries, generally includes slurrying, films, is dried, rolls, the operation such as cutting, although the manufacturing process of different vendor or different batteries may change to some extent, pole piece rolls the operation that is all absolutely necessary.Pole piece can reach certain compacted density after rolling, and this lifting to lithium ion battery energy density is extremely important.
Pole piece in correlation technique rolls and normally adopts pair rolls cold pressing technology, and this technology is to utilize cold press to roll pole piece under normal temperature state, so that pole piece reaches designed thickness.But expansion rebound phenomena easily appears in the pole piece after colding pressing in subsequent handling, and then cause the distortion of battery.
For example, a kind of known lithium battery pole slice roll-in process equipment adopts two pair rollers that an aximal deformation value of pole piece roll is separated into little twice compress variation, thereby effectively reduce the stress that roll-in processing produces pole piece roll, reduced the warpage degree of pole piece roll, reduced the possibility of pole piece roll broken belt, the production efficiency and the stability that have improved roll process, also reduced the waste of pole piece roll.But, the pole piece that utilizes above-mentioned processing mode to produce, the bounce-back degree that its bounce-back degree produces with the pole piece of once colding pressing is consistent, that is to say and does not solve pole piece bounce-back problem, can not effectively improve battery core problem on deformation.
In view of this, necessaryly provide a kind of and can effectively prevent that pole piece from rolling the electrodes of lithium-ion batteries rolling device of rear expansion bounce-back.
Utility model content
The purpose of this utility model is: provide a kind of and can effectively prevent that pole piece from rolling the electrodes of lithium-ion batteries rolling device of rear expansion bounce-back, to improve battery problem on deformation.
In order to realize foregoing invention object, the utility model provides a kind of electrodes of lithium-ion batteries rolling device, and it comprises a pair of cold pressing roller and a pair of hot-pressing roller of being located at cold pressing roller upstream, and the magnitude relationship of hot-pressing roller roll gap D1 and cold pressing roller roll gap D2 is D1 >=D2.
As a kind of improvement of the utility model electrodes of lithium-ion batteries rolling device, described hot-pressing roller is the hot-pressing roller of 25～150 ℃, and cold pressing roller is the cold pressing roller of 10～15 ℃.
A kind of improvement as the utility model electrodes of lithium-ion batteries rolling device, electrodes of lithium-ion batteries rolling device also comprises for the heater of heat hot pressure roller with for the cooling device of cooling cold pressing roller, heater is connected separately respectively with each warm-up mill, and cooling device is connected separately respectively with each cold pressing roller.
A kind of improvement as the utility model electrodes of lithium-ion batteries rolling device, the surface of described each hot-pressing roller is equiped with the outer induction temperature detecting module of a plurality of work independent of one another, these modules detect the variations in temperature on hot-pressing roller surfaces and also control heater hot-pressing roller is heated, its to the precision of hot-pressing roller surface temperature control within the scope of ± 1 ℃.
As a kind of improvement of the utility model electrodes of lithium-ion batteries rolling device, one-tenth-value thickness 1/10 D3 when described cold pressing roller roll gap D2 equals pole piece and reaches required compacted density, the value of hot-pressing roller roll gap D1 is preferably D1=D2=D3.
As a kind of improvement of the utility model electrodes of lithium-ion batteries rolling device, the rotation of described hot-pressing roller and cold pressing roller is by a series of anti-loosening bearings, and roll gap D1, D2 are controlled by Fine adjustment knob respectively, and the degree of regulation of each Fine adjustment knob is all more than 1 μ m.
As a kind of improvement of the utility model electrodes of lithium-ion batteries rolling device, the upstream of described hot-pressing roller is provided with the preheating device that pole piece is carried out to preheating.
As a kind of improvement of the utility model electrodes of lithium-ion batteries rolling device, described preheating device is for can be heated to pole piece infrared heating device or the electric heater unit of 25～150 ℃, and the surface of preheating device adopts Teflon insulating cell as protection.
As a kind of improvement of the utility model electrodes of lithium-ion batteries rolling device, every a pair of in described hot-pressing roller and cold pressing roller is all provided with roll gap pressure control structure, and every pair roller is all adjusted into transmission side pressure and equals non-drive lateral pressure.
As a kind of improvement of the utility model electrodes of lithium-ion batteries rolling device, the pressure of described hot-pressing roller and cold pressing roller is provided by hydraulic system respectively, and hydraulic system adopts the hydraulic pump of variable volume.
Compared with prior art, the utility model electrodes of lithium-ion batteries rolling device is the hot cold reduction device of four roll structures, it is heated to uniform temperature by pole piece when hot pressing, and therefore available less pressure rolls pole piece the thickness of needs, has reduced the extension phenomenon of diaphragm in the process of rolling; After hot pressing, by colding pressing, pole piece is carried out to thickness sizing again, thereby reduced the expansion rebound phenomena after pole piece rolling, effectively improved battery core problem on deformation.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model electrodes of lithium-ion batteries rolling device and beneficial effect thereof are elaborated, wherein:
Fig. 1 is the structural representation of the utility model electrodes of lithium-ion batteries rolling device.
Fig. 2 is the schematic diagram that rolls of the utility model electrodes of lithium-ion batteries rolling device.
The specific embodiment
In order to make goal of the invention of the present utility model, technical scheme and useful technique effect thereof more clear, below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.Should be understood that, the specific embodiment of describing in this description is only used to explain the utility model, is not intended to limit the utility model.
Refer to Fig. 1 and Fig. 2, the utility model electrodes of lithium-ion batteries rolling device comprises preheating device 10, hot-pressing roller 12, cold pressing roller 14, heater 16, dancer 18 and cooling device 20.
Preheating device 10 is located at the upstream of hot-pressing roller 12, for pole piece 30 to be rolled after coating is preheating to the temperature close with hot-pressing roller 12.In preheating device 10, be provided with the passage passing for pole piece 30, and adopt the modes such as infrared ray or electrical heating to heat the pole piece 30 through wherein, the temperature range of heating is 25～150 ℃.The surface of preheating device 10 adopts Teflon insulating cell as protection.
Hot-pressing roller 12 is a pair of, for being fitted to each other, pole piece 30 is carried out to hot pressing, and heating-up temperature scope during its work is 25～150 ℃.Cold pressing roller 14 is located at the downstream of hot-pressing roller 12, is also a pair of, for being fitted to each other, pole piece 30 is colded pressing, and chilling temperature scope during its work is 10～15 ℃.
The rotation of hot-pressing roller 12 and cold pressing roller 14 is by a series of anti-loosening bearings, and the gap between every pair of pressure roller is controlled by Fine adjustment knob respectively, thereby the degree of regulation that guarantees roll gap D1, D2 is more than 1 μ m; During use, the value of roll gap D1, D2 is adjusted into respectively: D1 >=D3, D2=D3; Be preferably D1=D2=D3, wherein, D3 is the one-tenth-value thickness 1/10 of pole piece 30 while reaching required compacted density.
Hot-pressing roller 12 and cold pressing roller 14 are all designed to pressure can independent control structure, and the pressure of each pressure roller is provided by hydraulic system respectively, and hydraulic system adopts the hydraulic pump of variable volume.When pressure roller does not move, the flow of pressurized of hydraulic pump can reduce, thereby saves energy and reduce the wearing and tearing between parts; When the setting pressure of pressure roller hour, adopt little volume hydraulic pressure pattern to improve pressure and adjust precision.During use, the thickness when making pole piece 30 reach required compacted density, when adjusting roll gap D1 and D2, also needs to regulate the roll gap pressure of hot-pressing roller 12 and cold pressing roller 14, and generally the pressure of every pair roller is adjusted into transmission side pressure equals non-drive lateral pressure.
Heater 16 is for heat hot pressure roller 12, and mode of heating is a kind of of the modes such as electrical heating, electromagnetic induction heating, heat-conducting oil heating.For convenient, each hot-pressing roller 12 is heated, heater 16 is connected separately respectively with each warm-up mill 10.For fear of hot-pressing roller 12, because thermal expansion appears in temperature contrast, cause the thickness fluctuation of pole piece width, on the surface of hot-pressing roller 12, installed the outer induction temperature detecting module 22 of eight work independent of one another; These modules 22 detect the variations in temperature on hot-pressing roller 12 surfaces and also control 16 pairs of hot-pressing rollers 12 of heater and heat, thus the variations in temperature on hot-pressing roller 12 surfaces is controlled at ± 1 ℃ within the scope of.
Cooling device 20 is for cooling cold pressing roller 14, and the type of cooling is water quench or other suitable modes.Cooling in order conveniently each cold pressing roller 14 to be carried out, cooling device 20 is connected separately respectively with each cold pressing roller 14.
Treat that roller pole piece 30 comprises collector 32 and the diaphragm 34,36 of coating collector two sides; Owing to there being the one side district of filming on collector 32, so the length of diaphragm 34 is greater than the length of diaphragm 36.
Roll before beginning, first utilize micromatic setting that the size of roll gap D1 between two hot-pressing rollers 12 is adjusted into the one-tenth-value thickness 1/10 D3 when equaling or being slightly larger than pole piece 30 and reaching required compacted density, the size of roll gap D2 between two cold pressing rollers 14 is adjusted into and equals D3.
While rolling, treat that first roller pole piece 30 is heated to surface temperature through preheating device 10 close with hot-pressing roller 12 temperature, then insert between two hot-pressing rollers 12 and carry out hot pressing (now, hot-pressing roller 12 provides thermal source by heater 16, and utilize eight and respond to temperature detecting module 22 control surface temperature outward), thereby pole piece 30 thickness are rolled to attenuation by D0, be D1(D0>D1 >=D3); Pole piece 30 after hot pressing carries out tension buffer through dancer 18, insert afterwards between two cold pressing rollers 14 and cold pressing, the water quench that cold pressing roller 14 is provided by cooling device 20, one-tenth-value thickness 1/10 D3 when equaling pole piece 30 and reach required compacted density due to the roll gap D2 between two cold pressing rollers 14, therefore colds pressing and the thickness of pole piece 30 can be fixed to D3.
Known by above description, with respect to existing pair rolls cold pressing technology, the utility model adopts the hot cold reduction device of four roll structures, it is heated to uniform temperature by pole piece 30 when hot pressing, therefore available less pressure rolls pole piece 30 thickness of needs, has reduced the extension phenomenon of diaphragm 34,36 in the process of rolling; After hot pressing, by colding pressing, pole piece 30 is carried out to thickness sizing again, thereby reduced the expansion rebound phenomena after pole piece 30 rollings, effectively improved battery core problem on deformation.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned embodiment.Therefore, the utility model is not limited to the specific embodiment disclosed and described above, to modifications and changes more of the present utility model, also should fall in the protection domain of claim of the present utility model.In addition,, although used some specific terms in this description, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (10)
1. an electrodes of lithium-ion batteries rolling device, comprises a pair of cold pressing roller, it is characterized in that: also comprise a pair of hot-pressing roller of being located at cold pressing roller upstream, the magnitude relationship of hot-pressing roller roll gap D1 and cold pressing roller roll gap D2 is D1 >=D2.
2. electrodes of lithium-ion batteries rolling device according to claim 1, is characterized in that: described hot-pressing roller is the hot-pressing roller of 25～150 ℃, and cold pressing roller is the cold pressing roller of 10～15 ℃.
3. electrodes of lithium-ion batteries rolling device according to claim 2, it is characterized in that: also comprise for the heater of heat hot pressure roller with for the cooling device of cooling cold pressing roller, heater is connected separately respectively with each warm-up mill, and cooling device is connected separately respectively with each cold pressing roller.
4. electrodes of lithium-ion batteries rolling device according to claim 3, it is characterized in that: the surface of described each hot-pressing roller is equiped with the outer induction temperature detecting module of a plurality of work independent of one another, these modules detect the variations in temperature on hot-pressing roller surfaces and also control heater hot-pressing roller is heated, its to the precision of hot-pressing roller surface temperature control within the scope of ± 1 ℃.
5. electrodes of lithium-ion batteries rolling device according to claim 1, is characterized in that: one-tenth-value thickness 1/10 D3 when described cold pressing roller roll gap D2 equals pole piece and reaches required compacted density, the value of hot-pressing roller roll gap D1 is preferably D1=D2=D3.
6. electrodes of lithium-ion batteries rolling device according to claim 1, it is characterized in that: the rotation of described hot-pressing roller and cold pressing roller is by a series of anti-loosening bearings, roll gap D1, D2 are controlled by Fine adjustment knob respectively, and the degree of regulation of each Fine adjustment knob is all more than 1 μ m.
7. according to the electrodes of lithium-ion batteries rolling device described in any one in claim 1 to 6, it is characterized in that: the upstream of described hot-pressing roller is provided with the preheating device that pole piece is carried out to preheating.
8. electrodes of lithium-ion batteries rolling device according to claim 7; it is characterized in that: described preheating device is for can be heated to pole piece infrared heating device or the electric heater unit of 25～150 ℃, and the surface of preheating device adopts Teflon insulating cell as protection.
9. according to the electrodes of lithium-ion batteries rolling device described in any one in claim 1 to 6, it is characterized in that: every a pair of in described hot-pressing roller and cold pressing roller is all provided with roll gap pressure control structure, and every pair roller is all adjusted into transmission side pressure and equals non-drive lateral pressure.
10. electrodes of lithium-ion batteries rolling device according to claim 9, is characterized in that: the pressure of described hot-pressing roller and cold pressing roller is provided by hydraulic system respectively, and hydraulic system adopts the hydraulic pump of variable volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320564063.0U CN203437408U (en) | 2013-09-11 | 2013-09-11 | Lithium ion battery pole piece grinding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320564063.0U CN203437408U (en) | 2013-09-11 | 2013-09-11 | Lithium ion battery pole piece grinding device |
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| Publication Number | Publication Date |
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| CN203437408U true CN203437408U (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320564063.0U Expired - Lifetime CN203437408U (en) | 2013-09-11 | 2013-09-11 | Lithium ion battery pole piece grinding device |
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| Country | Link |
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| CN (1) | CN203437408U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105521993A (en) * | 2016-02-02 | 2016-04-27 | 佛山市金银河智能装备股份有限公司 | Steam heating type roller press |
| CN106001130A (en) * | 2016-06-02 | 2016-10-12 | 广东基泰智能设备有限公司 | Lithium strip temperature control calendering device |
| CN107655791A (en) * | 2017-09-20 | 2018-02-02 | 赣州市瑞富特科技有限公司 | A kind of cell negative electrode material electrode slice compacted density method of testing |
| CN108199005A (en) * | 2018-01-03 | 2018-06-22 | 浙江衡远新能源科技有限公司 | The rolling method and equipment of a kind of battery pole piece |
| CN109509865A (en) * | 2018-12-13 | 2019-03-22 | 无锡凯帕德瑞科技有限公司 | Rolling pole piece of lithium ion battery machine |
| CN110404980A (en) * | 2019-07-24 | 2019-11-05 | 深圳市信宇人科技股份有限公司 | Novel no extension precision rollers machine |
| CN112743734A (en) * | 2020-12-18 | 2021-05-04 | 成都佳驰电子科技有限公司 | Production method of high-density composite film with hot-pressing pressure maintaining function |
| CN113206221A (en) * | 2021-04-20 | 2021-08-03 | 惠州市恒泰科技股份有限公司 | Lithium battery, lithium battery pole piece and preparation method thereof |
| CN113517421A (en) * | 2021-07-12 | 2021-10-19 | 四川无量智慧道桥科技有限公司 | Lithium battery pole piece die forming and die casting system and die casting process |
| CN114535295A (en) * | 2021-12-22 | 2022-05-27 | 捷威动力工业嘉兴有限公司 | Rolling equipment and rolling process for positive and negative electrode plates |
| US11777072B2 (en) | 2018-11-09 | 2023-10-03 | Contemporary Amperex Technology Co., Limited | Electrode plate rolling apparatus and electrode plate rolling method |
-
2013
- 2013-09-11 CN CN201320564063.0U patent/CN203437408U/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105521993A (en) * | 2016-02-02 | 2016-04-27 | 佛山市金银河智能装备股份有限公司 | Steam heating type roller press |
| CN106001130A (en) * | 2016-06-02 | 2016-10-12 | 广东基泰智能设备有限公司 | Lithium strip temperature control calendering device |
| CN106001130B (en) * | 2016-06-02 | 2017-09-15 | 广东基泰智能设备有限公司 | Lithium band temperature control calender device |
| CN107655791A (en) * | 2017-09-20 | 2018-02-02 | 赣州市瑞富特科技有限公司 | A kind of cell negative electrode material electrode slice compacted density method of testing |
| CN108199005B (en) * | 2018-01-03 | 2020-06-23 | 浙江衡远新能源科技有限公司 | Rolling method and equipment for battery pole piece |
| CN108199005A (en) * | 2018-01-03 | 2018-06-22 | 浙江衡远新能源科技有限公司 | The rolling method and equipment of a kind of battery pole piece |
| US11777072B2 (en) | 2018-11-09 | 2023-10-03 | Contemporary Amperex Technology Co., Limited | Electrode plate rolling apparatus and electrode plate rolling method |
| CN109509865A (en) * | 2018-12-13 | 2019-03-22 | 无锡凯帕德瑞科技有限公司 | Rolling pole piece of lithium ion battery machine |
| CN109509865B (en) * | 2018-12-13 | 2019-10-01 | 无锡凯帕德瑞科技有限公司 | Rolling pole piece of lithium ion battery machine |
| CN110404980A (en) * | 2019-07-24 | 2019-11-05 | 深圳市信宇人科技股份有限公司 | Novel no extension precision rollers machine |
| WO2021012773A1 (en) * | 2019-07-24 | 2021-01-28 | 深圳市信宇人科技股份有限公司 | Novel non-stretching precise roller press |
| CN112743734A (en) * | 2020-12-18 | 2021-05-04 | 成都佳驰电子科技有限公司 | Production method of high-density composite film with hot-pressing pressure maintaining function |
| CN113206221A (en) * | 2021-04-20 | 2021-08-03 | 惠州市恒泰科技股份有限公司 | Lithium battery, lithium battery pole piece and preparation method thereof |
| CN113517421A (en) * | 2021-07-12 | 2021-10-19 | 四川无量智慧道桥科技有限公司 | Lithium battery pole piece die forming and die casting system and die casting process |
| CN113517421B (en) * | 2021-07-12 | 2022-06-21 | 四川无量智慧道桥科技有限公司 | Lithium battery pole piece die forming and die casting system and die casting process |
| CN114535295A (en) * | 2021-12-22 | 2022-05-27 | 捷威动力工业嘉兴有限公司 | Rolling equipment and rolling process for positive and negative electrode plates |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |