CN105470560A - High-energy lithium-ion battery and winding method therefor - Google Patents
High-energy lithium-ion battery and winding method therefor Download PDFInfo
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- CN105470560A CN105470560A CN201511029357.3A CN201511029357A CN105470560A CN 105470560 A CN105470560 A CN 105470560A CN 201511029357 A CN201511029357 A CN 201511029357A CN 105470560 A CN105470560 A CN 105470560A
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- district
- battery core
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- positive plate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a high-energy lithium-ion battery and a winding method therefor. The high-energy lithium-ion battery comprises a battery core, wherein a packaging film coats the outside of the battery core; the battery core comprises a positive plate and a negative plate; a diaphragm is arranged between the positive plate and the negative plate; the tail end of the positive plate is connected with a positive blank foil region; the front surface of the positive plate is provided with a non-powder region and a powder region; the back surface of the positive plate is provided with the powder region; the tail end of the negative plate is connected with a negative blank foil region; the front surface of the negative plate is provided with the non-powder region and the powder region; and the back surface of the negative plate is provided with the powder region. According to the high-energy lithium-ion battery and the winding method therefor, the amount of active materials on the positive plate and the negative plate is improved by increasing the sizes and the widths of the powder region of the positive plate and the negative plate; and the capacity of the battery is improved when the thinning requirement of a soft package lithium-ion battery is met.
Description
Technical field
The present invention relates to technical field of lithium ion, particularly relate to a kind of high energy lithium ion cell and method for winding thereof.
Background technology
Lithium ion battery because of have energy density high, have extended cycle life, the feature such as environmental protection, be widely used in the portable type electronic products such as mobile phone, notebook, portable power source, digital camera.In recent years, wearable electronic product also more and more adopts lithium ion battery as power supply, dresses series products volume usually little, along with product develops towards sophistication, the space leaving power supply for is further compressed, and this just requires that lithium ion battery has higher energy density.
The lithium ion battery volume energy density that volume is little is more bulky much smaller, and at present, the main method promoting energy density is by improving charge cutoff voltage; In addition, utilize space to greatest extent, the amount increasing active material is also promote the important means of energy density.
In soft bag lithium ionic cell, closedtop seal is generally at 1.5-2.0mm, and this just needs the edge sealing reserving more than 3.0mm to closedtop wide.At present, the electric core winding mode of winding-structure is normally welded with negative pole pre-roll one circle half of lug end, as shown in Figure 1, then, inserts the positive plate being welded with lug and reels.But, along with more and more higher to the requirement of capacity, adopt aforesaid way to can not meet the demand of client.
Summary of the invention
The object of the invention is to propose a kind of high energy lithium ion cell and method for winding thereof, the technical problem of the energy content of battery can not be improved with the battery solving the more thinning existed in prior art further.
For reaching this object, the present invention by the following technical solutions:
A kind of high energy lithium ion cell, comprise battery core, described battery core is wrapped with encapsulating film, and the lug of described battery core is through described encapsulating film;
Described battery core comprises positive plate and negative plate, barrier film is provided with between described positive plate and described negative plate, the end of described positive plate is connected with the positive pole Kong Bo district for connecting tab, the front of described positive plate is provided with Fei Fen district and powder district, the back side of described positive plate is powder district, the end of described negative plate is connected with the negative pole Kong Bo district for connecting tab, the front of described negative plate is provided with Fei Fen district and powder district, the back side of described negative plate is powder district, and described positive pole Kong Bo district is all connected with the Fei Fen district of described positive plate and described negative plate with described negative pole Kong Bo district.
Further, the side that described encapsulating film is positioned at described lug is provided with lug hot edge seal, and the width d of described lug hot edge seal is 1mm.
Further, described positive pole Kong Bo district and the described lug that described negative pole Kong Bo district is connected all are positioned at the front of described positive plate and described negative plate.
Further, described lug and described positive pole Kong Bo district and described negative pole Kong Bo district are welded to connect.
Further, described encapsulating film is aluminum plastic film.
The present invention also provides a kind of method for winding of high energy lithium ion cell, comprises the following steps:
Winding: by the Kong Bo district of negative plate and Fei Fen district pre-roll half-turn, afterwards, the Kong Bo district of positive plate and Fei Fen district are inserted into pre-roll part, the Kong Bo district of negative plate and the Kong Bo district of Fei Fen district and positive plate and Fei Fen district are oppositely arranged, positive plate and negative plate are wound into battery core;
Encapsulating film is shaping: become the reeded encapsulating film of tool by mould punching;
Encapsulation: battery core put in the groove of encapsulating film, closedtop width reserves 2.5mm, is sealed respectively by lug heat sealing machine and an edge sealing heat sealing machine;
Fluid injection: the battery core after baking, moves on in glove box, edge sealing after injection electrolyte;
Change into: battery core by formation cabinet, carries out first discharge and recharge to battery core, activated batteries material after leaving standstill;
Shaping: by vacuum-pumping heat sealing machine, the excess electrolyte and gas changing into battery core is taken out, and seals battery core two edge sealing;
Partial volume: by grading system, carries out discharge and recharge to battery core, makes battery core reach the electrical property of necessary requirement.
Further, described lug heat sealing machine adopts the closedtop end socket of 1.0mm to seal.
A kind of high energy lithium ion cell provided by the invention and method for winding thereof, during use, the Fei Fen district of negative plate and with negative pole Kong Bo district bend be buckled in positive plate Fei Fen district and positive pole Kong Bo district on, be equivalent to the pre-roll half-turn when reeling, pre-roll one in hinge structure encloses half, decrease battery core thickness, the space saved can increase more active material, thus reaches the effect improving battery capacity.
Meanwhile, during encapsulation, the width that closedtop width is reserved diminishes, thus a part of space can be discharged, this segment space can be used for the width increasing positive plate and negative plate, and then can be increased in the amount of active material on positive plate and negative plate, thus promotes battery capacity.
This high energy lithium ion cell and method for winding thereof, promote the amount of the active material on positive plate and negative plate by the size and width increasing the powder district of positive plate and negative plate, meet soft bag lithium ionic cell more while thinning, promote battery capacity.
Accompanying drawing explanation
Fig. 1 is the front view of electric core winding initial state in prior art;
Fig. 2 is the front view of the electric core winding initial state of the high energy lithium ion cell that the embodiment of the present invention provides;
Front view when Fig. 3 is the encapsulation of the high energy lithium ion cell that the embodiment of the present invention provides;
Fig. 4 is the FB(flow block) of the method for winding of the high energy lithium ion cell that the embodiment of the present invention provides.
In figure:
1, battery core; 2, encapsulating film; 11, positive plate; 12, negative plate; 13, barrier film; 14, lug.
Embodiment
Technical scheme of the present invention is further illustrated by embodiment below in conjunction with accompanying drawing.
Embodiment 1
As shown in Figures 2 and 3, a kind of high energy lithium ion cell, comprises battery core 1, and battery core 1 is wrapped with encapsulating film 2, and the lug 14 of battery core 1 is through encapsulating film 2;
Battery core 1 comprises positive plate 11 and negative plate 12, barrier film 13 is provided with between positive plate 11 and negative plate 12, the end of positive plate 11 is connected with the positive pole Kong Bo district for connecting tab 14, the front of positive plate 11 is provided with Fei Fen district and powder district, the back side of positive plate 11 is powder district, the end of negative plate 12 is connected with the negative pole Kong Bo district for connecting tab 14, the front of negative plate 12 is provided with Fei Fen district and powder district, the back side of negative plate 12 is powder district, and positive pole Kong Bo district is all connected with the Fei Fen district of positive plate 11 and negative plate 12 with negative pole Kong Bo district.
The battery core 1 of this high energy lithium ion cell, after the end of positive plate 11 and negative plate 12 bends mutual snapping, negative pole Kong Bo district and positive pole Kong Bo district are positioned at same layer, therefore, both upper lugs 14 connected corresponding also at same layer, in hinge structure pre-one circle half when, decrease two layers of negative plate 12 and the thickness shared by 4 layers of barrier film 13, therefore, what battery core 1 can be made is thinner, meanwhile, can increase the area in powder district, increase the amount of active material, battery capacity is improved.
The side that encapsulating film 2 is positioned at lug 14 is provided with lug 14 hot edge seal, and the width d of lug 14 hot edge seal is 1mm.Its width of width d relatively existing lug 14 hot edge seal of lug 14 hot edge seal reduces, therefore, the width D of reserved closedtop can be reduced accordingly, at present, reserved 2.5mm, the width D of reserved closedtop reduces, the width of internal positive plate 11 and negative plate 12 can be increased, width increase can increase the width in powder district accordingly, and namely increase active matter quality, battery capacity is improved.
Positive pole Kong Bo district is all positioned at the front of positive plate 11 and negative plate 12 with the lug 14 that negative pole Kong Bo district is connected.
Wherein, lug 14 is arranged on the front in positive pole Kong Bo district and negative pole Kong Bo district respectively, after negative plate 12 bends, bending part is relative with positive plate 11, both isolate only by one deck barrier film 13, and more ensure that two lugs 14 can be in same layer, the thickness of battery core 1 can be thinner.
Preferably, lug 14 is welded to connect with positive pole Kong Bo district and negative pole Kong Bo district.Positive plate 11 and the adhesive linkage be equipped with between negative plate 12 with barrier film 13 for being fixedly connected with.Encapsulating film 2 is aluminum plastic film.
During concrete use, what this high energy lithium ion cell can reach act as:
1, the energy content of battery is improved: by adopting the mode of pre-roll half-turn, the area in powder district can be increased, and then increasing the content of active material, battery capacity improves, in addition, by reducing the width d of closedtop edge sealing, reduce the width D of reserved closedtop, increase the width of positive plate 11 and negative plate 12, the area in powder district can be increased by straight line equally, and then increase the content of active material, battery capacity improves.
2, battery core 1 is thinner: by adopting the mode of pre-roll half-turn, between two lugs 14, eliminate two layers of negative plate 12 and the thickness shared by 4 layers of barrier film 13, two poles and be positioned at same layer, therefore, the thickness of battery core 1 reduces, thus can make high energy lithium ion cell more thinning.
Embodiment 2
As shown in Figure 4, a kind of method for winding of high energy lithium ion cell, comprises the following steps:
Winding: by the Kong Bo district of negative plate and Fei Fen district pre-roll half-turn, afterwards, the Kong Bo district of positive plate and Fei Fen district are inserted into pre-roll part, the Kong Bo district of negative plate and the Kong Bo district of Fei Fen district and positive plate and Fei Fen district are oppositely arranged, positive plate and negative plate are wound into battery core 1;
Encapsulating film 2 is shaping: become the reeded encapsulating film 2 of tool by mould punching;
Encapsulation: battery core 1 put in the groove of encapsulating film 2, closedtop width reserves 2.5mm, is sealed respectively by lug 14 heat sealing machine and an edge sealing heat sealing machine;
Fluid injection: the battery core 1 after baking, moves on in glove box, edge sealing after injection electrolyte;
Change into: after battery core 1 leaves standstill, by formation cabinet, first discharge and recharge is carried out to battery core 1, activated batteries material;
Shaping: by vacuum-pumping heat sealing machine, the excess electrolyte and gas changing into battery core 1 is taken out, and seals battery core 1 two edge sealing;
Partial volume: by grading system, carries out discharge and recharge to battery core 1, makes battery core 1 reach the electrical property of necessary requirement.
Preferably, lug 14 heat sealing machine adopts the closedtop end socket of 1.0mm to seal.
The method for winding of a kind of high energy lithium ion cell that above-described embodiment provides, during use, the Fei Fen district of negative plate 12 and with negative pole Kong Bo district bend be buckled in positive plate 11 Fei Fen district and positive pole Kong Bo district on, be equivalent to the pre-roll half-turn when reeling, pre-roll one in hinge structure encloses half, decreases the area adding powder district that battery core thickness is contrary, therefore, the amount of active material can be increased, thus reach the effect improving battery capacity.
Meanwhile, during encapsulation, the width that closedtop width is reserved diminishes, thus a part of space can be discharged, this segment space can be used for the width increasing positive plate 11 and negative plate 12, and then can be increased in the amount of active material on positive plate 11 and negative plate 12, thus promotes battery capacity.
This high energy lithium ion cell and method for winding thereof, the amount of the active material on positive plate 11 and negative plate 12 is promoted by the size and width increasing the powder district of positive plate 11 and negative plate 12, meet soft bag lithium ionic cell more while thinning, promote battery capacity.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (7)
1. a high energy lithium ion cell, it is characterized in that, comprise battery core (1), described battery core (1) is wrapped with encapsulating film (2), and the lug (14) of described battery core (1) is through described encapsulating film (2);
Described battery core (1) comprises positive plate (11) and negative plate (12), barrier film (13) is provided with between described positive plate (11) and described negative plate (12), the end of described positive plate (11) is connected with the positive pole Kong Bo district for connecting tab (14), the front of described positive plate (11) is provided with Fei Fen district and powder district, the back side of described positive plate (11) is powder district, the end of described negative plate (12) is connected with the negative pole Kong Bo district for connecting tab (14), the front of described negative plate (12) is provided with Fei Fen district and powder district, the back side of described negative plate (12) is powder district, described positive pole Kong Bo district is all connected with the Fei Fen district of described positive plate (11) and described negative plate (12) with described negative pole Kong Bo district.
2. high energy lithium ion cell according to claim 1, is characterized in that, the side that described encapsulating film (2) is positioned at described lug (14) is provided with lug hot edge seal, and the width d of described lug hot edge seal is 1mm.
3. high energy lithium ion cell according to claim 1, it is characterized in that, described positive pole Kong Bo district is all positioned at the front of described positive plate (11) and described negative plate (12) with the described lug (14) that described negative pole Kong Bo district is connected.
4. high energy lithium ion cell according to claim 1, is characterized in that, described lug (14) is welded to connect with described positive pole Kong Bo district and described negative pole Kong Bo district.
5. high energy lithium ion cell according to claim 1, is characterized in that, described encapsulating film (2) is aluminum plastic film.
6. a method for winding for high energy lithium ion cell, is characterized in that, comprises the following steps:
Winding: by the Kong Bo district of negative plate and Fei Fen district pre-roll half-turn, afterwards, the Kong Bo district of positive plate and Fei Fen district are inserted into pre-roll part, the Kong Bo district of negative plate and the Kong Bo district of Fei Fen district and positive plate and Fei Fen district are oppositely arranged, positive plate and negative plate are wound into battery core;
Encapsulating film is shaping: become the reeded encapsulating film of tool by mould punching;
Encapsulation: battery core put in the groove of encapsulating film, closedtop width reserves 2.5mm, is sealed respectively by lug heat sealing machine and an edge sealing heat sealing machine;
Fluid injection: the battery core after baking, moves on in glove box, edge sealing after injection electrolyte;
Change into: battery core by formation cabinet, carries out first discharge and recharge to battery core, activated batteries material after leaving standstill;
Shaping: by vacuum-pumping heat sealing machine, the excess electrolyte and gas changing into battery core is taken out, and seals battery core two edge sealing;
Partial volume: by grading system, carries out discharge and recharge to battery core, makes battery core reach the electrical property of necessary requirement.
7. the method for winding of high energy lithium ion cell according to claim 6, is characterized in that, described lug heat sealing machine adopts the closedtop end socket of 1.0mm to seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511029357.3A CN105470560A (en) | 2015-12-30 | 2015-12-30 | High-energy lithium-ion battery and winding method therefor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511029357.3A CN105470560A (en) | 2015-12-30 | 2015-12-30 | High-energy lithium-ion battery and winding method therefor |
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| CN105470560A true CN105470560A (en) | 2016-04-06 |
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| CN201511029357.3A Pending CN105470560A (en) | 2015-12-30 | 2015-12-30 | High-energy lithium-ion battery and winding method therefor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511757A (en) * | 2018-03-16 | 2018-09-07 | 深圳市前海星火同为科技有限公司 | A kind of lithium ion battery with moisture-proof crash structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003086233A (en) * | 2001-09-07 | 2003-03-20 | Mitsubishi Electric Corp | Flat plate type battery |
| CN203218392U (en) * | 2013-04-09 | 2013-09-25 | 东莞新能源科技有限公司 | Lithium-ion battery structure |
| CN203932197U (en) * | 2014-05-14 | 2014-11-05 | 广东国光电子有限公司 | A kind of lithium ion battery cell |
| CN205385074U (en) * | 2015-12-30 | 2016-07-13 | 惠州亿纬锂能股份有限公司 | High -energy lithium ion battery |
-
2015
- 2015-12-30 CN CN201511029357.3A patent/CN105470560A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003086233A (en) * | 2001-09-07 | 2003-03-20 | Mitsubishi Electric Corp | Flat plate type battery |
| CN203218392U (en) * | 2013-04-09 | 2013-09-25 | 东莞新能源科技有限公司 | Lithium-ion battery structure |
| CN203932197U (en) * | 2014-05-14 | 2014-11-05 | 广东国光电子有限公司 | A kind of lithium ion battery cell |
| CN205385074U (en) * | 2015-12-30 | 2016-07-13 | 惠州亿纬锂能股份有限公司 | High -energy lithium ion battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108511757A (en) * | 2018-03-16 | 2018-09-07 | 深圳市前海星火同为科技有限公司 | A kind of lithium ion battery with moisture-proof crash structure |
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Application publication date: 20160406 |