CN203842921U - Steel belt type rolling mill for battery pole piece - Google Patents
Steel belt type rolling mill for battery pole piece Download PDFInfo
- Publication number
- CN203842921U CN203842921U CN201420227277.3U CN201420227277U CN203842921U CN 203842921 U CN203842921 U CN 203842921U CN 201420227277 U CN201420227277 U CN 201420227277U CN 203842921 U CN203842921 U CN 203842921U
- Authority
- CN
- China
- Prior art keywords
- steel belt
- belt tensioning
- roller
- pole piece
- tensioning roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 92
- 239000010959 steel Substances 0.000 title claims abstract description 92
- 238000005096 rolling process Methods 0.000 title abstract description 14
- 239000011149 active material Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 238000007766 curtain coating Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
A steel belt type rolling mill for a battery pole piece comprises an upper roller, a lower roller and a steel belt tensioning gear. A hydraulic device acts on the two ends of the upper roller or the two ends of the lower roller. The steel belt tensioning gear comprises a first steel belt tensioning roller, a second steel belt tensioning roller, a third steel belt tensioning roller and a steel belt. The first steel belt tensioning roller and the second steel belt tensioning roller are placed on the lower middle portions of the two sides of the lower roller respectively, and the third steel belt tensioning roller is placed above the upper roller. The steel belt part is wrapped on the upper surface of the lower roller between the upper roller and the lower roller and then is wound on the outer surface of the first steel belt tensioning roller, the outer surface of the second steel belt tensioning roller and the outer surface of the third steel belt tensioning roller. The battery pole piece passes through the position between the steel belt and the upper surface of the lower roller, and the battery pole piece is pressed by the upper roller. The steel belt type rolling mill for the battery pole piece has the advantage that active materials on the battery pole piece cannot flow, expand and even fall off.
Description
Technical field
The utility model relates to a kind of battery pole piece steel band type roller mill.
Background technology
Lithium ion battery is made up of lithium-ion electric core, electrolyte, holding circuit (PCM) and housing parts.Battery core is made up of positive pole, negative pole and barrier film.Anodal part is positive electrode (as LiFePO4)+conductive agent+adhesive (PVDF)+collector (aluminium foil), and the part of negative pole is graphite+conductive agent+thickener (CMC)+binding agent (SBR)+collector (Copper Foil).Anodal and negative pole is commonly referred to as battery pole piece in the industry cycle, and in order to improve the density of battery pole piece surfacing and the uniformity of thickness, positive/negative plate must carry out roll extrusion after painting process, and this operation is called the rolling of battery pole piece.
The process of battery pole piece rolling is that battery pole piece is drawn in by the frictional force producing between roll and battery pole piece between the roll of rotation, the process of battery pole piece compressive deformation.The rolling of battery pole piece is different from the rolling of bloom, and the process of steel rolling is the process that an iron molecule extends longitudinally and laterally spreads, and its density does not change in the operation of rolling; And the rolling of battery pole piece is the process of battery material compaction on a positive/negative plate, its object is to increase the compacted density of negative or positive electrode material, suitable compacted density can increase the discharge capacity of battery, reduce internal resistance, reduce polarization loss, extend the cycle life of battery, improve the utilization rate of lithium ion battery.Through overtesting, suitable positive electrode compacted density is about 2.8g/cm
3-3.4g/cm
3between, negative pole be about 1.5g/cm
3.Compacted density excessive or too small, is all unfavorable for embedding or the deintercalation of lithium ion.Therefore, when battery pole piece is implemented roll extrusion, roll-force is unsuitable excessive also unsuitable too small, should meet the feature of battery pole piece material.
Existing battery pole piece roller mill, the most frequently used two-roller mill, it comprises top roll and lower roll, between the two end axles bearing of described topping roll and bottom roll, be respectively provided with a pair of voussoir (gap adjusting device) for regulating roll gap, bottom, two ends at bottom roll is provided with the hydraulic means that bottom roll is upwards pushed up, described hydraulic means ensures the stable of roll gap, is referred to as the rolling of fixed roll seam in industry; Certainly, no matter also have three rollers or four-high mill, be two rollers, three rollers or four-high mill, and they are all the operation of rolling of line contact to the rolling of battery pole piece, the rolling of this line contact is easy to cause the upper active material curtain coating of battery pole piece, the problem that expansion even comes off.
Utility model content
In order to overcome the problems referred to above, the utility model provides a kind of upper active material curtain coating that is difficult for causing battery pole piece, expansion, the battery pole piece steel band type roller mill even coming off.
The technical solution of the utility model is: a kind of battery pole piece steel band type roller mill is provided, comprise topping roll, bottom roll and steel strip tension device, hydraulic means acts on the two ends of described topping roll or bottom roll, described steel strip tension device comprises the first steel belt tensioning roller, the second steel belt tensioning roller, the 3rd steel belt tensioning roller and steel band, described the first steel belt tensioning roller and the second steel belt tensioning roller lay respectively at below in the both sides of described bottom roll, described the 3rd steel belt tensioning roller is positioned at the top of topping roll, described steel band part is coated on after the upper face of the bottom roll between topping roll and bottom roll, around described the first steel belt tensioning roller, on the second steel belt tensioning roller and the 3rd steel belt tensioning roller outer surface, battery pole piece is through between described steel band and the upper face of bottom roll, suppressed by described topping roll.
As to improvement of the present utility model, the diameter of described bottom roll is greater than the diameter of described topping roll.
As to improvement of the present utility model, described the first steel belt tensioning roller and the second steel belt tensioning roller are symmetrical arranged with described bottom roll mid point.
As to improvement of the present utility model, described the 3rd steel belt tensioning roller is arranged on directly over described topping roll.
The utility model is owing to having adopted steel strip tension device, steel band part in described steel strip tension device is coated on the upper face of the bottom roll between topping roll and bottom roll, because steel band has been equivalent to change the curvature of bottom roll, bottom roll curvature is diminished, as long as change the centre-to-centre spacing of the first and second idler rollers and bottom roll, in other words change the cornerite of steel band and bottom roll, can obtain infinitesimal curvature, so existing roller mill is transformed into the applanation mode that becomes in linear pressure mode, when battery pole piece (just enters pressure area in the tangent position district of the first idler roller and bottom roll through described, arrive the tangent line district, point of contact (maximum pressure point Fmax) of bottom roll and topping roll, pressure F is the trend of increase, cross the trend that pressure behind the tangent line district, point of contact of bottom roll and topping roll is minimizing, so just reach the ideal style of pole piece roll-in, there is precompressed (increasing progressively), high pressure (maximum), solidify (successively decreasing) three pressure areas, battery pole piece is between by steel band and the upper face of bottom roll time, because the covered section of steel band is relatively fixing to the active material on battery pole piece, topping roll is in the time of the active material of suppressing on battery pole piece, can not cause active material curtain coating yet, expand and the problem that comes off, improved the quality of battery pole piece.
Brief description of the drawings
Fig. 1 is the planar structure schematic diagram of a kind of embodiment of the present utility model.
Detailed description of the invention
Refer to Fig. 1, what Fig. 1 disclosed is a kind of battery pole piece steel band type roller mill, comprise topping roll 1, bottom roll 2 and steel strip tension device 3, hydraulic means acts on the two ends of described topping roll 1 or bottom roll 2, described steel strip tension device 3 comprises the first steel belt tensioning roller 31, the second steel belt tensioning roller 32, the 3rd steel belt tensioning roller 33 and steel band 34, described the first steel belt tensioning roller 31 and the second steel belt tensioning roller 32 lay respectively at below in the both sides of described bottom roll 2, described the 3rd steel belt tensioning roller 33 is positioned at the top of topping roll 1, described steel band 34 parts are coated on after the upper face of the bottom roll 2 between topping roll 1 and bottom roll 2, around described the first steel belt tensioning roller 31, on the second steel belt tensioning roller 32 and the 3rd steel belt tensioning roller 33 outer surfaces, battery pole piece 4 is through between described steel band 34 and the upper face of bottom roll 2, suppressed by described topping roll 1.Like this, between battery pole piece 4 is through described steel band and the upper face of bottom roll 2, while compacting by described topping roll 1, because the covered section of steel band 34 is relatively fixing to the active material on battery pole piece 4, topping roll 1 is in the time of the active material of suppressing on battery pole piece 4, also can not cause active material curtain coating, the problem of expanding and come off, has improved the quality of battery pole piece 4.
Preferably, the diameter of described bottom roll 2 is greater than the diameter of described topping roll 1.
Preferably, the line 35 of described the first steel belt tensioning roller 31 and the second steel belt tensioning roller 32 mid points, was positioned at the below of the extended line 21 of described bottom roll 2 mid points.
Preferably, the line 35 of described the first steel belt tensioning roller 31 and the second steel belt tensioning roller 32 mid points, with cross described bottom roll 2 mid points extended line 21 in the same horizontal line.
Preferably, described the first steel belt tensioning roller 31 and the second steel belt tensioning roller 32 are symmetrical arranged with described bottom roll 2 mid points.
Preferably, described the 3rd steel belt tensioning roller 33 is arranged on directly over described topping roll 1.Preferably the mid point of bottom roll 2, topping roll 1, the 3rd steel belt tensioning roller 33 is on same plumb line.
Claims (4)
1. a battery pole piece steel band type roller mill, comprise topping roll (1) and bottom roll (2), hydraulic means acts on the two ends of described topping roll (1) or bottom roll (2), it is characterized in that, also comprise steel strip tension device (3), described steel strip tension device (3) comprises the first steel belt tensioning roller (31), the second steel belt tensioning roller (32), the 3rd steel belt tensioning roller (33) and steel band (34), described the first steel belt tensioning roller (31) and the second steel belt tensioning roller (32) lay respectively at below in the both sides of described bottom roll (2), described the 3rd steel belt tensioning roller (33) is positioned at the top of topping roll (1), described steel band (34) part is coated on after the upper face of the bottom roll (2) between topping roll (1) and bottom roll (2), around described the first steel belt tensioning roller (31), on the second steel belt tensioning roller (32) and the 3rd steel belt tensioning roller (33) outer surface, battery pole piece (4) is through between described steel band (34) and the upper face of bottom roll (2), suppressed by described topping roll (1).
2. battery pole piece steel band type roller mill according to claim 1, is characterized in that, the diameter of described bottom roll (2) is greater than the diameter of described topping roll (1).
3. battery pole piece steel band type roller mill according to claim 1 and 2, is characterized in that, described the first steel belt tensioning roller (31) and the second steel belt tensioning roller (32) are symmetrical arranged with described bottom roll (2) mid point.
4. battery pole piece steel band type roller mill according to claim 1 and 2, is characterized in that, described the 3rd steel belt tensioning roller (33) is arranged on directly over described topping roll (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420227277.3U CN203842921U (en) | 2014-05-06 | 2014-05-06 | Steel belt type rolling mill for battery pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420227277.3U CN203842921U (en) | 2014-05-06 | 2014-05-06 | Steel belt type rolling mill for battery pole piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203842921U true CN203842921U (en) | 2014-09-24 |
Family
ID=51555983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420227277.3U Expired - Fee Related CN203842921U (en) | 2014-05-06 | 2014-05-06 | Steel belt type rolling mill for battery pole piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203842921U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022217717A1 (en) * | 2021-04-16 | 2022-10-20 | 上海五星铜业股份有限公司 | Rolling method for wide metal strip foil |
-
2014
- 2014-05-06 CN CN201420227277.3U patent/CN203842921U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022217717A1 (en) * | 2021-04-16 | 2022-10-20 | 上海五星铜业股份有限公司 | Rolling method for wide metal strip foil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Longgang District of Shenzhen City, Guangdong province 518000 Dragon Street Huilong Po community hoffen (Longgang) Industrial Area No. 2 plant floor, two floor, third floor, four floor Patentee after: Shenzhen xinyuren Polytron Technologies Inc Address before: Lu Hongfeng Industrial Zone No. 38 Hui Pu Cun Longgang District of Shenzhen City, Guangdong Province, No. 1 518000 Patentee before: Shenzhen Xinyuren Technology Co., Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Steel belt type rolling mill for battery pole piece Effective date of registration: 20190410 Granted publication date: 20140924 Pledgee: Bank of Beijing Limited by Share Ltd Shenzhen branch Pledgor: Shenzhen xinyuren Polytron Technologies Inc Registration number: 2019990000315 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200722 Granted publication date: 20140924 Pledgee: Bank of Beijing Limited by Share Ltd. Shenzhen branch Pledgor: SHENZHEN XINYUREN TECHNOLOGY Co.,Ltd. Registration number: 2019990000315 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20210506 |