CN201556665U - Continuous rolling device for electrode of lithium ion battery - Google Patents
Continuous rolling device for electrode of lithium ion battery Download PDFInfo
- Publication number
- CN201556665U CN201556665U CN2009203049705U CN200920304970U CN201556665U CN 201556665 U CN201556665 U CN 201556665U CN 2009203049705 U CN2009203049705 U CN 2009203049705U CN 200920304970 U CN200920304970 U CN 200920304970U CN 201556665 U CN201556665 U CN 201556665U
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- electrode
- lithium ion
- rolling device
- continuous rolling
- roll
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- 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
Abstract
The utility model discloses a continuous rolling device for the electrode of a lithium ion battery, and is characterized in that a heating device is arranged between an unwinding shaft and a roller. The utility model has the benefits that the dryness of the electrode can be ensured, the plasticity of an electrode plate can be enhanced, the rebound rate of the electrode plate can reduced after rolling, the surface density of a single side of the electrode plate can be appropriately increased, thereby increasing the volume to capacity ratio of the battery, the structure is simple, and the operation is convenient.
Description
Technical field
The utility model belongs to battery and makes the field, particularly relates to a kind of lithium ion cell electrode continuous rolling device.
Background technology
At present, the production method of lithium ion cell electrode is roughly and earlier the anode and cathode slurry (mainly comprising both positive and negative polarity active material, binding agent, conductive agent, solvent etc.) that stirs is coated in uniformly collector (just very aluminium foil or aluminium net, negative pole is Copper Foil or copper mesh) on, by baking solvent is dried by the fire again, obtain dry electrode; Then by roll squeezer (seeing figure one) with the electrode compacting, again electrode is cut into specific length, width little, weld drainage body (just very aluminium strip, negative pole is nickel strap or copper strips or copper nickel composite band) at last, so just obtained final electrode.After but electrode is compacted to the thickness of regulation by roll squeezer, through producing certain bounce-back after a while, make the thickening of electrode, just be difficult to hold more electrode active material in the battery of unit volume, the volume of battery specific capacity is difficult to promote like this, can't adapt to the demand of high-end market for the high-volume and capacity ratio lithium ion battery.
Each battery production person is attempting making in all sorts of ways to reduce the rebound degree of electrode slice, the method that adopts secondary segmenting roll extrusion after the full wafer roll extrusion is disclosed as Chinese patent CN1276529C, solve battery electrode with it and roll up the problem of putting to advance too greatly in the battery case, improve battery capacity simultaneously.As seen the key of its described problem is the resilience of electrode slice, the method more complicated that this patent adopted, operating difficulties, more inconvenient continuous production.
Summary of the invention
The utility model provides a kind of continuous rolling device of lithium ion cell electrode sheet simple to operate.
The utility model solves the problems of the technologies described above the device that is adopted: a kind of lithium ion cell electrode sheet continuous rolling device, comprise unreeling shaft, roll and Scroll, and it is characterized in that: increase a heater between described unreeling shaft and the roll.
Adopt this technology can guarantee the aridity of electrode, the plasticity of increase electrode slice reduces the resilience of roll extrusion rear electrode sheet
Rate can suitably increase the single face surface density of electrode slice, so just can put into more electrode active material in the battery of unit volume, has promoted the volume of battery specific capacity to a certain extent.
As preferably, described heater is for having temperature controlled roaster.
As preferably, effective heated length of described roaster is 30-100 centimetre.
As preferably, described roaster is 10-60 centimetre apart from the distance of roll.
In sum, the beneficial effect that the continuous rolling device of a kind of lithium ion cell electrode sheet of the utility model brings is: the aridity that can guarantee electrode, increase the plasticity of electrode slice, reduce the rebound degree of roll extrusion rear electrode sheet, suitably increase the single face surface density of electrode slice, thereby promoted the volume of battery specific capacity, simple in structure, easy to operate.
Description of drawings
Accompanying drawing 1 is existing lithium ion cell electrode roll-in schematic diagram;
Accompanying drawing 2 is lithium ion cell electrode continuous rolling device schematic diagrames of the present utility model;
Embodiment
Be described further below in conjunction with the rolling process and the device thereof of accompanying drawing a kind of lithium ion cell electrode.
Embodiment: lithium ion cell electrode of the present utility model toasts the technology of roll-in continuously and installs as shown in Figure 2, its technology mainly comprises the dry good whole volume electrode 2 of coating is fixed on the unreeling shaft 1, the baking box 5 that passes setting heats, the electrode 2 of heating is drawn to and carries out roll-in on the roll squeezer 3, final electrode 2 closes on the Scroll 4, and the continuous baking of electrode 2, roll-in are finished.
With 423450AL type lithium ion battery is example, this technology is promoted the volume of battery specific capacity be the contrast experiment, and self-contained battery model, electrode raw material and compacted density contrast as follows:
Positive electrode, single face surface density 2.18g/cm
2, base material aluminium foil 0.016mm, compacted density 3.90g/cm
3, compacted depth promptly is about like this: 2.18*2/3.9/10+0.016=0.128mm;
By the current technology roll-in, extract 100 electrode small pieces, use miking thickness after the electrode compacting immediately, every average thickness is 0.1283mm; Leave standstill under vacuum state after 4 hours and measure thickness, every average thickness is 0.1332mm, bounce-back rate 3.82%;
Press the roll-in of the utility model technology, oven temperature is set to 135 ℃, extracts in the same way and measures, and every average
Thickness is 0.1282mm; Leave standstill under vacuum state after 4 hours and measure thickness, every average thickness is 0.1307mm, bounce-back rate 1.95%; Can bring up to 2.236 g/cm to the single face surface density of electrode slice like this
2[M1*2/3.9/10+0.016=0.1332/ (1+1.95%)];
Negative electrode, single face surface density 0.965g/cm
2, base material Copper Foil 0.010mm, compacted density 1.57g/cm
3, compacted depth promptly is about like this: 0.965*2/1.57/10+0.010=0.1330mm;
By the current technology roll-in, extract 100 electrode small pieces, use miking thickness after the electrode compacting immediately, every average thickness is 0.1335mm; Leave standstill 4 hours under vacuum state after, measure thickness, every average thickness is 0.1407mm, bounce-back rate 5.39%.
Press the roll-in of the utility model technology, oven temperature is set to 100 ℃, extracts in the same way and measures, and every average thickness is 0.1334mm; Leave standstill 4 hours under vacuum state after, measure thickness, every average thickness is 0.1383mm, bounce-back rate 3.67%.In like manner can suitably increase the single face surface density to 1.0654 g/cm
2[M2*2/1.57/10+0.010=0.1407/ (1+3.67%)];
Comprehensive 1,2 we can calculate by the following method and adopted the 423450AL battery capacity of the utility model explained hereafter to rise to: 2.236/2.18*850=871mAh, improve 2.57%.And positive electrode 2.236 g/cm
2Single face surface density and negative electrode 1.0654 g/cm
2The single face surface density all is in the scope that technology is allowed.
Claims (4)
1. a lithium ion cell electrode continuous rolling device comprises unreeling shaft, roll and Scroll, it is characterized in that: increase a heater between described unreeling shaft and the roll.
2. a kind of lithium ion cell electrode continuous rolling device according to claim 1, it is characterized in that: described heater is for having temperature controlled roaster.
3. a kind of lithium ion cell electrode continuous rolling device according to claim 2, it is characterized in that: effective heated length of described roaster is 30-100 centimetre.
4. a kind of lithium ion cell electrode continuous rolling device according to claim 2 is characterized in that: described roaster is 10-60 centimetre apart from the distance of roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203049705U CN201556665U (en) | 2009-06-24 | 2009-06-24 | Continuous rolling device for electrode of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203049705U CN201556665U (en) | 2009-06-24 | 2009-06-24 | Continuous rolling device for electrode of lithium ion battery |
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| CN201556665U true CN201556665U (en) | 2010-08-18 |
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| CN2009203049705U Expired - Fee Related CN201556665U (en) | 2009-06-24 | 2009-06-24 | Continuous rolling device for electrode of lithium ion battery |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088070A (en) * | 2010-10-29 | 2011-06-08 | 曹建礼 | Instant heating device for pole piece of battery pole piece rolling mill |
| CN102397828A (en) * | 2010-09-15 | 2012-04-04 | 株式会社又进 | Apparatus and method for manufacturing mmo anode using continuous coating and heat treatment process |
| CN103230962A (en) * | 2013-03-22 | 2013-08-07 | 奇瑞汽车股份有限公司 | Double material collection and double material feeding mechanism of rolling equipment, and control method thereof |
| 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 |
| CN110756425A (en) * | 2019-09-26 | 2020-02-07 | 合肥工业大学 | Separation device and separation method for electrode plates of waste vehicle-mounted lithium power batteries |
| WO2020093930A1 (en) * | 2018-11-09 | 2020-05-14 | 宁德时代新能源科技股份有限公司 | Electrode sheet rolling device, and electrode sheet rolling method |
| CN112221852A (en) * | 2020-10-10 | 2021-01-15 | 南京皮斯特新能源科技有限公司 | Lithium battery pole piece coating production and processing system |
-
2009
- 2009-06-24 CN CN2009203049705U patent/CN201556665U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102397828A (en) * | 2010-09-15 | 2012-04-04 | 株式会社又进 | Apparatus and method for manufacturing mmo anode using continuous coating and heat treatment process |
| CN102088070A (en) * | 2010-10-29 | 2011-06-08 | 曹建礼 | Instant heating device for pole piece of battery pole piece rolling mill |
| CN103230962A (en) * | 2013-03-22 | 2013-08-07 | 奇瑞汽车股份有限公司 | Double material collection and double material feeding mechanism of rolling equipment, and control method thereof |
| CN103230962B (en) * | 2013-03-22 | 2015-08-12 | 奇瑞新能源汽车技术有限公司 | The two of a kind of rolling equipment receive two laying mechanism and control method thereof |
| 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 |
| 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 |
| WO2020093930A1 (en) * | 2018-11-09 | 2020-05-14 | 宁德时代新能源科技股份有限公司 | Electrode sheet rolling device, and electrode sheet rolling method |
| US11777072B2 (en) | 2018-11-09 | 2023-10-03 | Contemporary Amperex Technology Co., Limited | Electrode plate rolling apparatus and electrode plate rolling method |
| CN110756425A (en) * | 2019-09-26 | 2020-02-07 | 合肥工业大学 | Separation device and separation method for electrode plates of waste vehicle-mounted lithium power batteries |
| CN112221852A (en) * | 2020-10-10 | 2021-01-15 | 南京皮斯特新能源科技有限公司 | Lithium battery pole piece coating production and processing system |
| CN112221852B (en) * | 2020-10-10 | 2022-04-05 | 湖南亿等新能源有限公司 | Lithium battery pole piece coating production and processing system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 315800 No. 5 West Avenue, Beilun Free Trade Zone, Ningbo, Zhejiang Patentee after: Ningbo Veken Battery Co., Ltd. Address before: 315800 No. 5 West Avenue, Beilun Free Trade Zone, Ningbo, Zhejiang Patentee before: Ningbo Veken Battery Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100818 Termination date: 20170624 |
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| CF01 | Termination of patent right due to non-payment of annual fee |