CN202058814U - Circular lithium ion battery - Google Patents
Circular lithium ion battery Download PDFInfo
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- CN202058814U CN202058814U CN2011200791118U CN201120079111U CN202058814U CN 202058814 U CN202058814 U CN 202058814U CN 2011200791118 U CN2011200791118 U CN 2011200791118U CN 201120079111 U CN201120079111 U CN 201120079111U CN 202058814 U CN202058814 U CN 202058814U
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- lithium ion
- negative pole
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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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Abstract
The utility model relates to a circular lithium ion battery, which comprises an electrode core formed by laminating and winding an anode, a diaphragm and a cathode in sequence, a battery shell and a battery cover, wherein the electrode core is arranged in the battery shell; the battery shell is filled with a non-aqueous electrolyte solution, and is sealed by the battery cover; the anode end face and the cathode end face of the electrode core are provided with exposed metal current-collecting substrates; and drainage is performed with an anode confluence body arranged between the anode end face and the battery cover and a cathode confluence body arranged between the cathode end face and the bottom of the battery shell respectively. The circular lithium ion battery has the characteristics of low internal resistance and long cycle service life, and is particular suitable for large-volume lithium ion batteries required to work at large current and high power.
Description
Technical field
The utility model relates to a kind of lithium ion battery, and being typically with the circle is the lithium ion battery of representative, and emphasis is its internal structure, particularly relates to a kind of circular lithium ion battery.
Background technology
In recent years, along with the fast development of electric tool, electronic toy, electric bicycle, hybrid vehicle etc., more and more higher requirement has been proposed for the high power discharge ability of storage battery.The power-type lithium ion storage battery is owing to have preferably the high-power operation performance and high-energy-density and advantage such as light, thereby just promoted the use of above field step by step.
Fig. 1 is the coiling utmost point group structural representation of prior art, as shown in the figure.Positive plate 1 includes positive active material for aluminium foil matrix two sides, also has at least one aluminium pole ears 2 simultaneously on aluminium foil; Negative plate 3 includes negative electrode active material for Copper Foil matrix two sides, also has at least one negative lug 4 simultaneously on Copper Foil; Positive pole, barrier film, negative pole stack gradually placement, and anodal and negative pole is wrapped up by barrier film 5 fully, and positive pole is wrapped up by negative pole fully.
Fig. 2 is the lithium rechargeable battery structural representation of prior art, as shown in the figure.With coiling utmost point group volume shown in Figure 1, and around the pole piece that forms, in the battery case 6 of packing into, negative lug 4 is stretched out barrier film 5, contacts or welds with the battery case bottom, and anodal aluminium pole ears 2 stretches out barrier film 5, contacts or welds with battery cover.
Electrode cores is injected non-aqueous electrolytic solution through behind the desiccant dehumidification, through sealing, change into, operation such as partial volume, make lithium ion battery.
Hence one can see that, and being stacked gradually by positive pole, barrier film, negative pole of the electrode cores of circular lithium ion battery is wound into the columniform pole piece of class, wherein is provided with lug on positive plate and the negative plate, is used for drawing of electric current.But along with the increase of battery capacity, pole piece length increases fast, in order to reach the requirement of high-power operation, certainly will will increase the quantity of lug, and the lug number increases, and the manufacture difficulty of pole piece increases, and the consistency of whole pole piece descends.Because the difficulty that circular lithium ion battery is drawn at electric current and heat causes circular lithium ion battery to be difficult to high capacity and high powerization, has hindered the development of circular lithium ion battery.
The utility model content
The purpose of this utility model is for overcoming a solution that above shortcoming is developed, and its purpose is to provide a kind of circular cheaply lithium ion battery that can high-power operation.
The technical solution of the utility model: a kind of circular lithium ion battery, comprise by positive pole, barrier film, negative pole and stack gradually the electrode cores of reeling and forming, battery container and battery cover, electrode cores is packed in the battery container, battery container is equipped with non-aqueous electrolytic solution, and seal by battery cover, the anodal end face of described electrode cores and negative pole end face are equipped with the metal afflux matrix that exposes, respectively by be located at positive pole between anodal end face and the battery cover conflux body and be located at the negative pole end face and the battery container bottom between the negative pole body that confluxes carry out drainage.
In the utility model, the anodal end face of described electrode cores is an aluminium foil, and aluminium foil is through flat end face of the flat formation in whirlpool.
In the utility model, between flat end face that constitutes by described aluminium foil and battery cover, be provided with the positive pole body that confluxes.
In the utility model, conflux body and aluminium foil end face of described positive pole be by welding or contact and be connected, and the positive pole body that confluxes is to be connected by welding or contacting with battery cover.
In the utility model, the described positive pole body that confluxes is the member that materials such as the aluminium of band shape, sheet, plate-like or titanium are formed, or above combination.
In the utility model, the described positive pole body that confluxes is the member that stainless steel materials such as stainless steel substrates, stainless steel band, stainless steel spring are formed, or above combination.
In the utility model, the negative pole end face of described electrode cores is a Copper Foil, and Copper Foil is through flat end face of the flat formation in whirlpool.
In the utility model, between the flat end face that constitutes by described Copper Foil and battery container bottom, be provided with the negative pole body that confluxes.
In the utility model, conflux body and Copper Foil end face of described negative pole be by welding or contact and be connected, and the negative pole body that confluxes is to be connected by welding or contacting with the battery container bottom.
In the utility model, the described negative pole body that confluxes is metal materials such as stainless steel, iron, nickel-clad iron, copper, nickel, nickel-clad copper or nickel plated copper, and the profile structure is sheet, band shape, spring-like, plate-like, foam-like, or above combination.
The beneficial effect that the utlity model has: circular lithium ion battery described in the utility model, because anodal end face is made up of cathode metal afflux matrix, and the negative pole end face is made up of negative pole metal afflux matrix, flat through the whirlpool then, formed the integral body that certain intensity is arranged, the afflux uniformity of whole positive plate and negative plate has obtained large increase.And between anodal end face and battery cover, also be provided with positive pole conflux body, especially positive pole conflux body and battery cover, anodal end face through welding after, anodal catchment effect has had the raising of matter especially.Between negative pole end face and battery case bottom, be provided with conflux body, especially negative pole of negative pole and conflux body and negative pole end face, battery case bottom through after welding, the catchment effect of negative pole has obtained the raising of matter equally.Anodal and negative pole currect collecting effect improves in pairs, and the catchment effect of entire cell also improves greatly.
Simultaneously, owing to need on positive plate and negative plate lug be set, the manufacturing course of processing of whole positive plate and negative plate is simplified greatly, and difficulty reduces greatly.The uniformity and the consistency of pole piece are greatly improved, and the consistency of pole piece is improved.
Therefore, circular lithium ion battery described in the utility model has the advantages that internal resistance is low, have extended cycle life, and need to be specially adapted to the high capacity lithium ion battery of big electric current, high-power operation.The overall performance that has improved battery has also reduced manufacturing cost simultaneously.
Description of drawings
Fig. 1 is the coiling utmost point group structural representation of prior art;
Fig. 2 is the lithium ion battery structure schematic diagram of prior art;
Fig. 3 is a coiling utmost point group structural representation of the present utility model;
Fig. 4 is a circular lithium ion battery structure schematic diagram of the present utility model.
[figure number is to as directed]
1 positive plate, 2 positive pole ears
3 negative plates, 4 negative lug
5 barrier films, 6 battery containers
8 negative pole dressing districts, 7 anode dressing districts
9 negative pole currect collecting end faces, 10 anode collection end faces
11 battery covers, the 12 positive poles body that confluxes
The 13 negative poles body that confluxes
Embodiment
Further understand and understanding for making architectural feature of the present utility model and the effect reached had, cooperate detailed explanation, be described as follows in order to preferred embodiment and accompanying drawing:
Fig. 3 is a coiling utmost point group schematic diagram of the present utility model, as shown in the figure.Positive plate 1, barrier film 5, negative plate 3 stack gradually placement.Positive plate 1 is divided into dressing district and non-dressing district, and the dressing district is for to include positive active material on the two sides of anodal matrix aluminium foil, and non-dressing district is anodal matrix aluminium foil.The dressing district of positive plate is wrapped in barrier film length and the width range fully before reeling, and a non-dressing district part is in barrier film parcel scope, and a part exceeds the barrier film width in addition, exposes 0.5 millimeter～20 millimeters, preferably exposes 2 millimeters～10 millimeters.It is too small to expose width, is unfavorable for that follow-up whirlpool is flat, and whole pole piece end face is difficult to form effective integral body, and intensity is also not enough, be difficult to support follow-up and positive pole conflux body welding or contact.It is excessive to expose width, anodal end face intensity height, but take more height space, be unfavorable for high capacity.
Negative plate is divided into dressing district and non-dressing district, and the dressing district is for to include negative electrode active material on the two sides of negative pole matrix Copper Foil, and non-dressing district is a negative pole matrix Copper Foil.Negative pole dressing district is wrapped in the length and width range of barrier film fully before reeling, and a non-dressing district part is in barrier film parcel scope, and a part exceeds the barrier film width in addition, exposes 0.1 millimeter～50 millimeters, preferably exposes 1 millimeter～10 millimeters.It is too small to expose width, is unfavorable for that follow-up whirlpool is flat, and whole pole piece end face is difficult to form effective integral body, and intensity is also not enough, be difficult to support follow-up and negative pole conflux body welding or contact.It is excessive to expose width, negative pole end face intensity height, but take more height space, be unfavorable for high capacity.
The width in negative pole dressing district 8 is greater than anode dressing district 7, requires the anode dressing district to be covered parcel by negative pole dressing district fully, will not separate out Li dendrite, battery generation safety problem otherwise have during charging on the negative plate of positive pole zone correspondence of negative pole dressing district parcel.
Fig. 4 is a circular lithium ion battery structure schematic diagram of the present utility model, and as shown in the figure, it is to adopt coiling utmost point group shown in Figure 3, through reeling, forms columned pole piece.
The circular lithium ion battery of the utility model preferred embodiment, comprise by positive pole 1, barrier film 5, negative pole 3 and stack gradually the electrode cores that constitutes, battery container 6, and battery cover 11, electrode cores is packed in the battery container 6, and in battery container 6, inject non-aqueous electrolytic solution, seal by battery cover 11 and form.The anodal end face of electrode cores and negative pole end face all have metal afflux matrix to expose, respectively by be located at positive pole between anodal end face and the battery cover 11 conflux body 12 and be located at the negative pole end face and battery container 6 bottoms between the negative pole body 13 that confluxes carry out drainage.
In the utility model preferred embodiment, the metal base flow matrix of the anodal end face of electrode cores is an aluminium foil, and aluminium foil is through flat end face of the flat formation in whirlpool.The metal afflux matrix of the negative pole end face of electrode cores is a Copper Foil, and Copper Foil is through flat end face of the flat formation in whirlpool.
Concrete, the positive terminal aluminium foil of electrode cores exposes, and the negative pole end Copper Foil of electrode cores exposes.The matrix aluminium foil of electrode cores positive plate when reeling and the matrix Copper Foil of negative plate all exceed the certain distance of barrier film end face, and (this distance range is 0.1-50mm, the preferred distance scope is 1-10mm), be wound into the anodal aluminium foil that will exceed the barrier film end face after the electrode cores again and the negative copper foil whirlpool is flat becomes flat end face, promptly form anode collection end face and negative pole currect collecting end face.
In the utility model preferred embodiment, conflux body 13 and Copper Foil end face of negative pole is can or contact by welding be connected, and the negative pole body 13 that confluxes is to be connected by welding or contacting with battery container 6 bottoms.
The negative pole body that confluxes is set between the bottom of negative pole end face and battery container 6, the negative pole body that confluxes is made up of one or more metal materials such as stainless steel, iron, nickel-clad iron, copper, nickel, nickel-clad copper, nickel plated copper, the profile structure can be sheet, band shape, spring-like, plate-like, foam-like etc., or above combination.
The negative pole end face at metal afflux matrix place is a negative pole currect collecting end face 9, and the bottom of this negative pole currect collecting end face 9 and battery container 6 can be welding, also can be tight contact.
The positive pole body 12 that confluxes is set between anodal end face and battery cover 11, the positive pole body 12 that confluxes is made up of one or more metal materials such as stainless steel, aluminium, titaniums, the profile structure can be sheet, band shape, spring-like, plate-like, foam-like etc., or above combination.
In the utility model preferred embodiment, conflux body 12 and aluminium foil end face of positive pole be by welding or contact and be connected, and the positive pole body 12 that confluxes is to be connected by welding or contacting with battery cover 11.
Electrode cores is injected non-aqueous electrolytic solution through behind the desiccant dehumidification, through sealing, change into, operation such as partial volume, make lithium ion battery.
The circular lithium ion battery of the utility model, because anodal end face is made up of cathode metal afflux matrix, and the negative pole end face is made up of negative pole metal afflux matrix, flat through the whirlpool then, formed the integral body that certain intensity is arranged, the afflux uniformity of whole positive plate and negative plate has obtained large increase.Between anodal end face and battery cover, also be provided with positive pole conflux body, especially positive pole conflux body and battery cover, anodal end face through welding after, anodal catchment effect has had the raising of matter especially.Between negative pole end face and battery case bottom, be provided with conflux body, especially negative pole of negative pole and conflux body and negative pole end face, battery case bottom through after welding, the catchment effect of negative pole has obtained the raising of matter equally.Anodal and negative pole currect collecting effect improves in pairs, and the catchment effect of entire cell also improves greatly.
Simultaneously, owing to need on positive plate and negative plate lug be set, the manufacturing course of processing of whole positive plate and negative plate is simplified greatly, and difficulty reduces greatly.The uniformity and the consistency of pole piece are greatly improved, and the consistency of pole piece is improved.
Therefore, actual effect of the present utility model has improved the overall performance of battery on the one hand, has reduced manufacturing cost on the one hand.
Though the utility model is with circular lithium ion battery object as an illustration, obviously, the same lithium ion battery that is suitable for other shape, rectangular lithium ion battery for example, equally can be by forming anode collection end face and negative pole currect collecting end face, positive pole body and the negative pole body that confluxes that confluxes is set, reaches the purpose that reduces internal resistance, improves the discharge power characteristic.
Though the utility model is that principle wherein and method are equally applicable to the battery of other kind obviously with lithium ion battery object as an illustration, for example Ni-MH battery equally can adopt.
In sum, it only is preferred embodiment of the present utility model, be not to be used for limiting the scope that the utility model is implemented, all equalizations of doing according to the described shape of the utility model claim scope, structure, feature and spirit change and modify, and all should be included in the claim scope of the present utility model.
Claims (10)
1. circular lithium ion battery, comprise by positive pole, barrier film, negative pole and stack gradually the electrode cores of reeling and forming, battery container and battery cover, electrode cores is packed in the battery container, battery container is equipped with non-aqueous electrolytic solution, and seal by battery cover, it is characterized in that, the anodal end face of described electrode cores and negative pole end face are equipped with the metal afflux matrix that exposes, respectively by be located at positive pole between anodal end face and the battery cover conflux body and be located at the negative pole end face and the battery container bottom between the negative pole body that confluxes carry out drainage.
2. a kind of circular lithium ion battery as claimed in claim 1 is characterized in that the anodal end face of described electrode cores is an aluminium foil, and aluminium foil is through flat end face of the flat formation in whirlpool.
3. a kind of circular lithium ion battery as claimed in claim 2 is characterized in that, is provided with the positive pole body that confluxes between flat end face that is made of described aluminium foil and battery cover.
4. as claim 2 or 3 described a kind of circular lithium ion batteries, it is characterized in that conflux body and aluminium foil end face of described positive pole be by welding or contact and be connected, the positive pole body that confluxes is to be connected by welding or contacting with battery cover.
5. a kind of circular lithium ion battery as claimed in claim 1 is characterized in that, the described positive pole body that confluxes is the member that the aluminium of band shape, sheet, plate-like or titanium material are formed, or above combination.
6. a kind of circular lithium ion battery as claimed in claim 1 is characterized in that, the described positive pole body that confluxes is the member that the stainless steel material of stainless steel substrates, stainless steel band, stainless steel spring is formed, or above combination.
7. a kind of circular lithium ion battery as claimed in claim 1 is characterized in that the negative pole end face of described electrode cores is a Copper Foil, and Copper Foil is through flat end face of the flat formation in whirlpool.
8. a kind of circular lithium ion battery as claimed in claim 7 is characterized in that, is provided with the negative pole body that confluxes between the flat end face that is made of described Copper Foil and battery container bottom.
9. as claim 7 or 8 described a kind of circular lithium ion batteries, it is characterized in that conflux body and Copper Foil end face of described negative pole be by welding or contact and be connected, the negative pole body that confluxes is to be connected by welding or contacting with the battery container bottom.
10. a kind of circular lithium ion battery as claimed in claim 1, it is characterized in that, the described negative pole body that confluxes is the metal material of stainless steel, iron, nickel-clad iron, copper, nickel, nickel-clad copper or nickel plated copper, the profile structure is sheet, band shape, spring-like, plate-like, foam-like, or above combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200791118U CN202058814U (en) | 2011-03-23 | 2011-03-23 | Circular lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200791118U CN202058814U (en) | 2011-03-23 | 2011-03-23 | Circular lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202058814U true CN202058814U (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200791118U Expired - Fee Related CN202058814U (en) | 2011-03-23 | 2011-03-23 | Circular lithium ion battery |
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| Country | Link |
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| CN (1) | CN202058814U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218264A (en) * | 2014-03-14 | 2014-12-17 | 深圳市倍特力电池有限公司 | Nickel-hydrogen battery and manufacturing method thereof |
| CN109980218A (en) * | 2017-12-28 | 2019-07-05 | 惠州亿纬锂能股份有限公司 | A kind of lithium battery |
-
2011
- 2011-03-23 CN CN2011200791118U patent/CN202058814U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218264A (en) * | 2014-03-14 | 2014-12-17 | 深圳市倍特力电池有限公司 | Nickel-hydrogen battery and manufacturing method thereof |
| CN109980218A (en) * | 2017-12-28 | 2019-07-05 | 惠州亿纬锂能股份有限公司 | A kind of lithium battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111130 Termination date: 20130323 |