CN102623746A - Flexibly-packaged lithium ion battery - Google Patents
Flexibly-packaged lithium ion battery Download PDFInfo
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- CN102623746A CN102623746A CN2012100813281A CN201210081328A CN102623746A CN 102623746 A CN102623746 A CN 102623746A CN 2012100813281 A CN2012100813281 A CN 2012100813281A CN 201210081328 A CN201210081328 A CN 201210081328A CN 102623746 A CN102623746 A CN 102623746A
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- lug
- lithium ion
- ion battery
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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
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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
- 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
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- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention belongs to the technical field of lithium ion batteries and particularly relates to a flexibly-packaged lithium ion battery, which has high energy density and excellent power performance. The flexibly-packaged lithium ion battery comprises a cell, a package bag and electrolyte, wherein the package bag is used for holding the cell and the electrolyte is filled into the package bag. The cell consists of a positive plate, a negative plate and a membrane which are wound, two ends of the positive plate are provided with an inner positive tag and an outer positive tag respectively, and the inner positive tag and the outer positive tag are connected electrically through a tag adapter terminal after being wound. Compared with the prior art, the inner positive tag and the outer positive tag at two ends of the positive plate are packaged in parallel, internal resistance of the battery can be reduced more, flow distribution can be realized during large-current battery charging, the integral thickness and the body length of the lithium ion battery cannot be affected by parallel package of the inner positive tag and the outer positive tag, and accordingly, the energy density of the lithium ion battery can be guaranteed while power performance can be improved.
Description
Technical field
The invention belongs to technical field of lithium ion, relate in particular to a kind of high energy density that both had, have good power-performance flexible packing lithium ion battery again.
Background technology
Lithium ion battery is as a kind of secondary cell of environmental protection, obtained extensive use in fields such as portable set such as mobile phone, video camera, notebook computers.Yet along with development of modern society, numerous portable sets all stride forward to intelligent, multifunction, for service time and the large current discharging capability that guarantees that it is sufficient, require the battery of its outfit must have higher energy density and power-performance.
For the low internal resistance that guarantees battery, powerful performance, this type battery present stage often adopts following four kinds of schemes to design:
The one, lamination promptly punches out a lot of positive plates and the negative plate that have lug, and a plurality of then positive plates, barrier film stack gradually with negative plate is in the same place, and a plurality of positive pole ears pile up overlapping, a plurality of negative lug stacked combination.Can with reference to publication number the one Chinese patent application of CN102024990A specifically;
The 2nd, collector extends the winding-structure of a plurality of lugs on the single pole piece; Be that both positive and negative polarity respectively is a long pole piece; Collector extends on its Width and is provided with a plurality of extensions then, and extension length, width of residing position and extension on collector all can be adjusted according to the actual needs of battery design, and the extension on the both positive and negative polarity collector can select to be arranged at the same end of battery; Perhaps be arranged at the two ends of battery respectively; When positive/negative plate and membrane coil after forming electric core, respectively the extension on the positive and negative electrode collector is combined, thereby is formed the both positive and negative polarity lug respectively.Can with reference to publication number the one Chinese patent application of CN201397857Y specifically;
The 3rd, the winding-structure of a plurality of lugs of welding on the single pole piece; Promptly, pole piece leaves a plurality of blank collectors gap when filming; Then at blank collector soldering polar ear at interval, when pole piece and membrane coil behind the electric core of formation, respectively positive pole ear is welded together; Negative lug also welds together, thereby forms the both positive and negative polarity lug respectively.Can with reference to publication number the one Chinese patent application of CN101034742B specifically;
The 4th, the mode that the electric core of a plurality of winding-structures is connected in parallel.
Yet, more than four kinds of designs can not guarantee that all battery had both had high energy density, have good power-performance again, and all have design defect:
Though lamination has reduced the internal resistance of battery to a great extent, the contraposition of positive and negative plate is difficulty very, and production efficiency is low, and lamination need guarantee pole piece around the negative plate area all be greater than the positive plate area, thereby lost energy density;
The winding-structure that collector extends a plurality of lugs on the single pole piece can bring difficulty to the coiling operation; Especially when adopting the winding method of automated production; The wrinkling problem of lug appears through regular meeting; Can influence the safety of battery when serious; And also can waste the length space of battery, off-energy density during the switching of a plurality of lugs;
The winding-structure of a plurality of lugs of welding mainly is used on box hat and the aluminum-shell battery on the single pole piece; This type battery security is poor; Explode easily when internal short-circuit occurring; Be difficult to be used on the flexible-packed battery; And lug is welded on the energy density that not only influences battery within the membrane areas, also makes troubles for automated production;
The electric core parallel technology of a plurality of winding-structures is very high to the coherence request of each electric core of reeling, and the efficient of welding is very low, and existing technology is difficult to reach in the industry.
In view of this, necessary a kind of superior power-performance that both had is provided, can guarantees the flexible packing lithium ion battery of energy content of battery density again.
Summary of the invention
The objective of the invention is to: to the deficiency of prior art, and a kind of flexible packing lithium ion battery is provided, this flexible packing lithium ion battery had both had high energy density, had good power-performance again.
In order to achieve the above object; The invention provides a kind of flexible packing lithium ion battery, comprise electric core, be used to hold the packaging bag of said electric core and be filled in the electrolyte in the said packaging bag, said electric core by positive plate, negative plate, membrane coil around forming; One end of said negative plate is provided with negative lug; The two ends of said positive plate are respectively equipped with anodal interior lug and anodal outer lug, and behind the coiling, lug is electrically connected through the lug conversion terminal with anodal outer lug in the described positive pole.
As a kind of improvement of flexible packing lithium ion battery of the present invention, lug is welded to connect with anodal outer lug and positive plate in the described positive pole.
As a kind of improvement of flexible packing lithium ion battery of the present invention, described packaging bag is the metallo-plastic composite membrane.
A kind of improvement as flexible packing lithium ion battery of the present invention; Said metallo-plastic composite membrane comprises metal level and the plastic layer that is arranged on said layer on surface of metal; The material of said metal level is aluminium, aluminium alloy or stainless steel, and the material of said plastic layer is polypropylene or polyethylene.The effect of metal level is the mechanical strength that increases battery, and the effect of plastic layer is the corrosion of hot melt encapsulation more easily, anti-electrolyte.
As a kind of improvement of flexible packing lithium ion battery of the present invention, lug is arranged on the same one side of said positive plate with the interior lug of positive pole outside the said positive pole, and promptly anodal outer lug and anodal interior lug are arranged on the two ends of the same coated surface of positive plate.
As a kind of improvement of flexible packing lithium ion battery of the present invention, the outer lug of said positive pole is provided with on said positive plate with anodal interior lug axisymmetricly.
As a kind of improvement of flexible packing lithium ion battery of the present invention, described lug conversion terminal is sheet metal, contain the hardware of circuit breaker or contain the hardware of fuse.
As a kind of improvement of flexible packing lithium ion battery of the present invention, be equipped with sealing gasket on described negative lug, anodal outer lug and the anodal interior lug.
A kind of improvement as flexible packing lithium ion battery of the present invention; Described negative lug is arranged on the blank afflux of the negative pole tagma of negative plate one end, and the outer lug of described positive pole is separately positioned on the anodal blank afflux tagma at said positive plate two ends with anodal interior lug.Blank afflux tagma can make the more convenient to operate of lug welding.
With respect to prior art, flexible packing lithium ion battery of the present invention has following advantage:
This flexible packing lithium ion battery has the advantage of energy type battery and power-type battery concurrently; The anodal lug that is positioned at the pole piece two ends encapsulates with anodal outer lug side by side; Can better reduce the internal resistance of battery, when battery large current density battery, can play the effect of shunting; Lug encapsulates the integral thickness that can not influence battery side by side with anodal outer lug in anodal; And can guarantee that the both positive and negative polarity lug has identical thickness; Be convenient to encapsulation; And two anodal lugs are to merge into a single whole at outside batteries; And unconventional inside battery merges lug; Can not influence the principal length of battery,, can improve the power-performance of battery again so this flexible packing lithium ion battery both can guarantee the energy density of battery.
In addition, flexible packing lithium ion battery simple structure of the present invention, it is convenient to implement, and can be mass-produced.
Another object of the present invention is to provide a kind of assemble method of flexible packing lithium ion battery, can accomplish the assembling of battery fast through this method, not only can guarantee the energy density of battery, and can improve the power-performance of battery.
The step of said assemble method is specially:
The first step, pole piece batching: blank afflux tagma is left at the positive plate two ends that are coated with active diaphragm, lug in anodal is welded on the blank afflux tagma of inboard one end of coiling direction of positive plate, and negative plate is provided with negative lug in the inboard of coiling direction;
In second step, electric core moulding: the arrangement mode according to positive plate, barrier film, negative plate is wound into electric core with positive plate, barrier film and negative plate, afterwards the outer lug of positive pole is welded on the blank afflux of the positive plate outside one end tagma of the electric core in back of reeling;
The 3rd step; The encapsulation of electricity core: the anodal interior lug of the electric core in back of will reeling is arranged side by side in a side at electric core top with anodal outer lug; Negative lug is positioned over the opposite side at electric core top; With the alignment of the sealing gasket on the lug, lug is encapsulated through the plastic layer of metallo-plastic composite membrane and the sealing gasket on the lug;
In the 4th step, the battery moulding: the electric core to after the fluid injection changes into and accomplishes Vacuum Package, fold shaping, through the lug conversion terminal lug in the positive pole and anodal outer lug is welded as a whole afterwards, as positive pole ear.
With respect to prior art, the assemble method of flexible packing lithium ion battery of the present invention has following advantage:
A kind of assemble method of flexible packing lithium ion battery; This assemble method is through leaving blank afflux tagma at the positive plate two ends; Lug in anodal is welded on the blank afflux of the inboard one end tagma of coiling direction of positive plate; Negative lug is welded on the inboard of negative plate at coiling direction, then positive plate, barrier film and negative plate is wound into electric core, afterwards the outer lug of positive pole is welded on the blank afflux of the positive plate outside one end tagma of the electric core in back of reeling; The anodal inside and outside lug of the electric core in back of reeling is arranged side by side in a side at electric core top; Negative lug is positioned over the opposite side at electric core top, and sealing gasket encapsulates lug on plastic layer through the metallo-plastic composite membrane and the lug, at last the electric core after the fluid injection is changed into and accomplish Vacuum Package; Through the lug conversion terminal the inside and outside lug of positive pole is welded as a whole, as positive pole ear.
This method has following advantage:
The one, positive pole ear and negative lug are welded on the blank afflux tagma at pole piece two ends, can not influence the ordinary production of painting process;
The 2nd, anodal in lug and negative lug all be arranged on the inboard of coiling direction, can be instant rolled around the time lug spacing control;
The 3rd, anodal interior lug and anodal outer lug are positioned at the two ends of positive plate, can better reduce the internal resistance of battery, improve the power-performance of battery;
The 4th, anodal interior lug encapsulates the integral thickness that can not influence battery side by side with anodal outer lug; And can guarantee that the both positive and negative polarity lug has identical thickness; Be convenient to encapsulation; And two anodal lugs are to merge into a single whole at outside batteries, can not influence the principal length of battery, can guarantee the energy density of battery.This method is simple and practical, can in automation process, realize.
Description of drawings
Fig. 1 is the front view of the negative plate of flexible packing lithium ion battery of the present invention;
Fig. 2 is the front view of the positive plate of flexible packing lithium ion battery of the present invention;
Fig. 3 is the stereogram of the electric core of flexible packing lithium ion battery of the present invention;
Fig. 4 is the front view of flexible packing lithium ion battery of the present invention;
Fig. 5 is the stereogram of flexible packing lithium ion battery of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention and useful technique effect thereof are elaborated according to the production process order.
Referring to Fig. 1-5; The invention provides a kind of flexible packing lithium ion battery; Comprise electric core 10, be used to hold the packaging bag 20 of said electric core 10 and be filled in the electrolyte in the said packaging bag 20; Around forming, an end of said negative plate 102 is provided with negative lug 70 to said electric core 10 by positive plate 101, negative plate 102, membrane coil, and the two ends of said positive plate 101 are respectively equipped with anodal interior lug 40 and anodal outer lug 41; Behind the coiling, lug 40 is electrically connected through lug conversion terminal 30 with anodal outer lug 41 in the described positive pole.
Wherein, lug 40 is welded to connect with positive plate 101 with anodal outer lug 41 in the described positive pole.
Described packaging bag 20 is the metallo-plastic composite membrane.
Said metallo-plastic composite membrane comprises metal level and the plastic layer that is arranged on said layer on surface of metal, and the material of said metal level is aluminium, aluminium alloy or stainless steel, and the material of said plastic layer is polypropylene or polyethylene.
The outer lug 41 of said positive pole is arranged on the same one side of said positive plate 101 with anodal interior lug 40.
The outer lug 41 of said positive pole is provided with on said positive plate 101 with anodal interior lug 40 axisymmetricly.
Described lug conversion terminal 30 for sheet metal, contain the hardware of circuit breaker or contain the hardware of fuse.
Be equipped with sealing gasket 80 on described negative lug 102, anodal outer lug 41 and the anodal interior lug 40.
Described negative lug 70 is arranged on the blank afflux of the negative pole tagma 90 of negative plate 102 1 ends, and the outer lug 41 of described positive pole is separately positioned on the anodal blank afflux tagma 60 at said positive plate 101 two ends with anodal interior lug 40.
During assembling, can be divided into following steps:
The first step; The pole piece batching: anodal blank afflux tagma 60 is left at positive plate 101 two ends that are coated with active diaphragm; Lug 40 in anodal is welded on the anodal blank afflux tagma 60 of inboard one end of coiling direction of positive plate 101, negative plate 102 is welded with negative lug 70 on the blank afflux of the negative pole tagma 90 of the inboard of coiling direction;
Second step; The moulding of electricity core: the arrangement mode according to positive plate 101, barrier film, negative plate 102 is wound into electric core 10 with positive plate 101, barrier film and negative plate 102, afterwards the outer lug 41 of positive pole is welded on the one proper extremely blank afflux tagma 60, positive plate 101 outsides of the electric core 10 in back of reeling;
The 3rd step; The encapsulation of electricity core: the anodal interior lug 40 of electric core 10 is arranged side by side in a side at electric core 10 tops with anodal interior lug 41 after will reeling; Negative lug 70 is positioned over the opposite side at electric core top; With the sealing gasket on the lug 80 alignment, plastic layer and the sealing gasket on the lug 80 through the metallo-plastic composite membrane encapsulate lug;
In the 4th step, the battery moulding: the electric core 10 to after the fluid injection changes into and accomplishes Vacuum Package, fold shaping, through lug conversion terminal 30 lug in the positive pole 40 and anodal outer lug 41 is welded as a whole afterwards, as positive pole ear.
Referring to Fig. 5; After accomplishing Vacuum Package; To encapsulate side 11 and carry out fold shaping; Through lug conversion terminal 30 lug in the positive pole 40 and anodal outer lug 41 are welded as a whole then, the welding position end 301 with lug conversion terminal 30 folds shaping afterwards, with the other end of lug conversion terminal 30 as positive pole ear.
With respect to prior art; Flexible packing lithium ion battery of the present invention has the advantage of energy type battery and power-type battery concurrently; The anodal lug 40 that is positioned at the pole piece two ends encapsulates with anodal outer lug 41 side by side; Can better reduce the internal resistance of battery, when battery large current density battery, can play the effect of shunting; Lug 40 encapsulates the integral thickness that can not influence battery side by side with anodal outer lug 41 in anodal; And can guarantee that the both positive and negative polarity lug has identical thickness, be convenient to encapsulation, and two anodal lugs are to merge into a single whole at outside batteries; And unconventional inside battery merges lug; Can not influence the principal length of battery,, can improve the power-performance of battery again so this flexible packing lithium ion battery both can guarantee the energy density of battery.In addition, this flexible packing lithium ion battery simple structure, it is convenient to implement, and can be mass-produced.
According to the announcement and the guidance of above-mentioned specification, those skilled in the art in the invention can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the specific embodiment that discloses and describe above the present invention is not limited to also should fall in the protection domain of claim of the present invention modifications and changes more of the present invention.In addition, although used some specific terms in this specification, these terms are explanation for ease just, the present invention is not constituted any restriction.
Claims (9)
1. flexible packing lithium ion battery; Comprise electric core, be used to hold the packaging bag of said electric core and be filled in the electrolyte in the said packaging bag; Around forming, an end of said negative plate is provided with negative lug to said electric core, it is characterized in that by positive plate, negative plate, membrane coil: the two ends of said positive plate are respectively equipped with anodal interior lug and anodal outer lug; Behind the coiling, lug is electrically connected through the lug conversion terminal with anodal outer lug in the described positive pole.
2. flexible packing lithium ion battery according to claim 1 is characterized in that: lug is welded to connect with anodal outer lug and positive plate in the described positive pole.
3. flexible packing lithium ion battery according to claim 1 is characterized in that: described packaging bag is the metallo-plastic composite membrane.
4. flexible packing lithium ion battery according to claim 3; It is characterized in that: said metallo-plastic composite membrane comprises metal level and the plastic layer that is arranged on said layer on surface of metal; The material of said metal level is aluminium, aluminium alloy or stainless steel, and the material of said plastic layer is polypropylene or polyethylene.
5. flexible packing lithium ion battery according to claim 1 is characterized in that: the outer lug of said positive pole is arranged on the same one side of said positive plate with anodal interior lug.
6. flexible packing lithium ion battery according to claim 1 is characterized in that: the outer lug of said positive pole is provided with on said positive plate with anodal interior lug axisymmetricly.
7. flexible packing lithium ion battery according to claim 1 is characterized in that: described lug conversion terminal is sheet metal, contain the hardware of circuit breaker or contain the hardware of fuse.
8. flexible packing lithium ion battery according to claim 1 is characterized in that: be equipped with sealing gasket on described negative lug, anodal outer lug and the anodal interior lug.
9. flexible packing lithium ion battery according to claim 1; It is characterized in that: described negative lug is arranged on the blank afflux of the negative pole tagma of negative plate one end, and the outer lug of described positive pole is separately positioned on the anodal blank afflux tagma at said positive plate two ends with anodal interior lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100813281A CN102623746A (en) | 2012-03-26 | 2012-03-26 | Flexibly-packaged lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100813281A CN102623746A (en) | 2012-03-26 | 2012-03-26 | Flexibly-packaged lithium ion battery |
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| CN102623746A true CN102623746A (en) | 2012-08-01 |
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| CN2012100813281A Pending CN102623746A (en) | 2012-03-26 | 2012-03-26 | Flexibly-packaged lithium ion battery |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591555A (en) * | 2016-07-06 | 2018-01-16 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN107634166A (en) * | 2017-10-19 | 2018-01-26 | 广东欧珀移动通信有限公司 | A kind of packaging film of polymer battery, polymer battery and electronic equipment |
| CN108417887A (en) * | 2018-05-21 | 2018-08-17 | 东莞塔菲尔新能源科技有限公司 | A kind of high power type lithium ion cell and preparation method thereof |
| CN108539061A (en) * | 2017-03-06 | 2018-09-14 | 湖南妙盛汽车电源有限公司 | A kind of soft-package battery |
| CN108777271A (en) * | 2018-05-25 | 2018-11-09 | 福建巨电新能源股份有限公司 | Large size is without lithium ion battery module group assembling structure in parallel |
| CN112635922A (en) * | 2020-12-16 | 2021-04-09 | 宁德新能源科技有限公司 | Battery cell, battery and electric equipment |
| CN113054156A (en) * | 2021-03-11 | 2021-06-29 | 珠海冠宇电池股份有限公司 | Electrode assembly and application thereof |
| WO2023051104A1 (en) * | 2021-09-28 | 2023-04-06 | 东莞新能安科技有限公司 | Connector, battery pack, and electric device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107591555A (en) * | 2016-07-06 | 2018-01-16 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN107591555B (en) * | 2016-07-06 | 2024-03-19 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN108539061A (en) * | 2017-03-06 | 2018-09-14 | 湖南妙盛汽车电源有限公司 | A kind of soft-package battery |
| CN107634166B (en) * | 2017-10-19 | 2023-11-21 | Oppo广东移动通信有限公司 | Packaging film of polymer battery, polymer battery and electronic equipment |
| CN107634166A (en) * | 2017-10-19 | 2018-01-26 | 广东欧珀移动通信有限公司 | A kind of packaging film of polymer battery, polymer battery and electronic equipment |
| CN108417887A (en) * | 2018-05-21 | 2018-08-17 | 东莞塔菲尔新能源科技有限公司 | A kind of high power type lithium ion cell and preparation method thereof |
| CN108777271A (en) * | 2018-05-25 | 2018-11-09 | 福建巨电新能源股份有限公司 | Large size is without lithium ion battery module group assembling structure in parallel |
| CN108777271B (en) * | 2018-05-25 | 2024-02-09 | 福建巨电新能源股份有限公司 | Large-sized parallel-connection-free lithium ion battery module assembly structure |
| CN112635922A (en) * | 2020-12-16 | 2021-04-09 | 宁德新能源科技有限公司 | Battery cell, battery and electric equipment |
| CN112635922B (en) * | 2020-12-16 | 2022-03-08 | 宁德新能源科技有限公司 | Battery cell, battery and electric equipment |
| CN113054156A (en) * | 2021-03-11 | 2021-06-29 | 珠海冠宇电池股份有限公司 | Electrode assembly and application thereof |
| CN113054156B (en) * | 2021-03-11 | 2023-02-28 | 珠海冠宇电池股份有限公司 | Electrode assembly and application thereof |
| WO2023051104A1 (en) * | 2021-09-28 | 2023-04-06 | 东莞新能安科技有限公司 | Connector, battery pack, and electric device |
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Application publication date: 20120801 |