CN201838675U - Thin battery - Google Patents

Thin battery Download PDF

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Publication number
CN201838675U
CN201838675U CN201020504895XU CN201020504895U CN201838675U CN 201838675 U CN201838675 U CN 201838675U CN 201020504895X U CN201020504895X U CN 201020504895XU CN 201020504895 U CN201020504895 U CN 201020504895U CN 201838675 U CN201838675 U CN 201838675U
Authority
CN
China
Prior art keywords
positive
negative
battery
plate
thin battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201020504895XU
Other languages
Chinese (zh)
Inventor
郭也平
邓健想
佟健
卢伟凤
刘群兴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL Corp
Huizhou Techne Group Co Ltd
Original Assignee
TCL Corp
Huizhou Techne Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TCL Corp, Huizhou Techne Group Co Ltd filed Critical TCL Corp
Priority to CN201020504895XU priority Critical patent/CN201838675U/en
Application granted granted Critical
Publication of CN201838675U publication Critical patent/CN201838675U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The utility model provides a thin battery, which includes a battery core, electrolyte and an outer packaging shell sealing the battery core and the electrolyte. The battery core includes a positive plate and a negative plate which are mutually overlapped; the positive plate and the negative plate are separated by an isolating membrane; the positive plate includes a current collector and a positive material layer contacted with the isolating membrane; the negative plate includes a current collector and a negative material layer contacted with the isolating membrane; besides the relative areas of the positive plate and the negative plate, the current collectors of the positive plate and the negative plate are respectively provided with a convex part, and the convex parts are respectively used as a positive tab and a negative tab; and the outer packaging shell is respectively provided with a small hole on the positions matched with the positive tab and the negative tab. The thin battery adopting the technical scheme directly uses one part of the current collector of a positive electrode and one part of the current collector of a negative electrode as the positive tab and the negative tab, and does not need to be additionally switched with tabs, thereby thinning the thickness of the battery.

Description

A kind of thin battery
Technical field
The utility model relates to a kind of thin battery.
Background technology
Lithium battery has operating voltage height, energy density height, has extended cycle life, self-discharge rate is low, advantage such as pollution-free, now has been widely used in miniaturized electronicss such as mobile phone, portable computer, video camera, camera.
Today, advanced portable electronic products is of a great variety, and is more and more higher to the requirement of battery, and battery is in the development that all lags behind electronic product aspect performance, useful life and the environmental impact, and gap between the two is increasing.Conventional batteries not only bulky but also charging interval long, be difficult to satisfy light, the thin requirement of modern electronic product, its volume size becomes the focus of attracting attention.
Present poly-lithium battery (Li-polymer claims high-polymer lithium battery again) has energy density height, more miniaturization, ultra-thinization, lightweight, and multiple clear superiorities such as high security and low cost.In shape, poly-lithium battery has ultra-thinization feature, can cooperate the needs of various products, is made into the battery of Any shape and capacity.But such battery minimum thickness that can reach only can reach 0.5mm at present, this is because nickel lug and the aluminium pole ears that battery need be transferred and be had fluid sealant, certain thickness and intensity are arranged, therefore cell thickness is subjected to the restriction of fluid sealant, nickel lug or aluminium pole ears thickness, accomplish that thinner battery has very high difficulty.
Therefore, prior art awaits improving and development.
The utility model content
The purpose of this utility model is to provide a kind of thinner lithium battery.
The technical solution of the utility model is as follows:
A kind of thin battery, the external packing shell that comprises this battery of battery, electrolyte and encapsulation and electrolyte, described battery comprises stacked positive plate and negative plate mutually, separate by barrier film between described positive plate and the negative plate, described positive plate comprises collector and the positive electrode material layer that contacts barrier film; Described negative plate comprises collector and the negative electrode material layer that contacts barrier film; Outside the positive and negative plate relative area, the collector of positive and negative plate respectively has a projection, respectively as positive and negative lug; Described external packing shell respectively has an aperture at the correspondence position of positive and negative lug.
Described thin battery, the collector of described positive pole are the aluminium collector, and described anode ear is provided with chromizing layer.
Described thin battery, the collector of described negative pole are the copper collector, and described negative electrode lug is provided with nickel coating.
Described thin battery, described external packing shell comprises the hot melt internal layer.
Described thin battery, described external packing shell is for comprising the hot melt coating, the aluminium plastic composite packaging film of aluminium lamination and nylon layer.
Described thin battery, described positive and negative lug is in the same side of described battery.
Described thin battery, described external packing shell at the edge sealing of positive and negative lug one side greater than its edge sealing in the thin battery both sides.
Described thin battery, described positive and negative lug is strip.
Described thin battery, the thickness of described thin battery is less than 0.3mm.
Described thin battery, the diameter of aperture is 2mm on the described external packing shell.
Adopt such scheme, thin battery of the present utility model directly utilizes the part of positive and negative electrode collector as positive and negative lug, need not to transfer in addition lug, thereby makes the cell thickness attenuation; Encapsulation adopts heat compound, owing to omitted lug glue, can further reduce cell thickness.
Description of drawings
Fig. 1 is a thin battery schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in further detail.
The utility model provides a kind of ultrathin lithium ion battery, its mainly by negative plate, positive plate, electrolyte, have the barrier film of micropore, and comprise that the aluminium plastic composite packaging film of hot melt coating, aluminium lamination and nylon layer forms as the external packing shell.
Fig. 1 has shown battery structural representation of the present utility model.Battery 1 is by external packing shell 2 parcels, encapsulation, and in the package position of negative electrode lug 3 and anode ear 4, external packing shell 2 leaves 2 apertures 5, is used to make lug to connect external circuit.
Wherein, negative electrode is that the graphitic carbon material is coated on the single face of 12 microns copper collectors as negative material, by drying, rolls, and the die-cut thickness of making is 17 * 24mm negative plate of 36 microns.In a side of negative plate, the copper collector has 4 * 4mm protuberance of a uncoated negative material, and a thin nickel coating is arranged on this protuberance, constitutes negative electrode lug 3.
Positive electrode is that positive electrode (can be materials such as cobalt acid lithium, LiMn2O4, manganese cobalt lithium nickelate, lithium nickelate, LiFePO 4) is coated on the single face of 16 microns aluminium collectors, by drying, roll, the die-cut thickness of making is 16 * 23mm positive plate of 39 microns.In a side of positive plate, the aluminium collector has 4 * 5mm protuberance of a uncoated positive electrode, and a thin chromizing layer is arranged on this protuberance, constitutes anode ear 4.
Respectively the positive electrode, the negative material that are coated with on the positive and negative electrode are placed inwardly, in the middle of negative electrode and positive electrode, inserted 12 microns polyethylene or polypropylene barrier film, make effectively insulation between the positive/negative plate, constitute the internal structure battery 1 of battery.As shown in fig. 1, negative electrode lug 3 and anode ear 4 towards consistent.Positive and negative lug also can be set to as required different towards.The assembling mode of electrode cores can be stacked, can be wound form also, for obtaining thinner battery, is preferably stacked in the utility model.
Use the external packing shell 2 of aluminium plastic composite packaging film to wrap described battery 1, the anode ear 4 of the negative electrode lug 3 of band nickel coating and band chromizing layer directly and the hot melt coating of the aluminium plastic composite packaging film on external packing shell 2 two sides to carry out heat compound.
The aluminium plastic composite packaging film is composited by hot melt polypropylene layer, aluminium lamination and nylon layer, and thickness is 87 microns, and with the correspondence position of positive and negative lug diameter being arranged on it is two apertures 5 of 2mm.Packaging film and packaging film, packaging film and the chromated aluminum collector, the nickel-clad copper collector melt process involution that are clipped in the middle guarantee to guarantee when battery can discharge and recharge that air, moisture do not invade.After compound the finishing of heat, the edge sealing width on battery both sides is 1mm, and the edge sealing width of lug one side is 5mm.
Carry out heat-sealable after, carry out vacuum dehumidifying, and inject electrolyte, battery is activated the final vacuum heat-sealing, finally finishes 20 * 30mm battery and makes through changing into.
The battery of making according to above-mentioned concrete grammar is measured, and cell thickness is 0.265mm, and battery capacity is 4.4mAh, adopt the 44mA charging, can reach 95% of design capacity in 6 minutes, fill 1C with 10C and put, battery capacity remains on more than 85% of former capacity after 600 weeks.The battery no leakage, gas does not rise, and comprehensive electrochemical is good.
Advantage of the present utility model:
1. the collector of positive/negative plate aluminium plastic composite packaging film direct and outer packing shell carries out enclosed package, greatly reduced prior art and required to have the metal tape of certain thickness and intensity and fluid sealant to the bottleneck of cell thickness attenuate, cell thickness is reduced to below the 0.3mm.
2. the chromizing layer on the positive plate aluminium collector and the nickel coating on the negative plate copper current collector have guaranteed that to carry out fine heat compound with the hot melt coating of outer packing shell aluminium plastic composite packaging film, the sticking intensity of collection liquid surface and hot melt coating is improved, the corrosion of electrolyte resistance improves, thereby improve the sealing property of battery, improve service life.
3, the positive and negative electrode collector does not extend to the plastic-aluminum packaging film shell, directly is enclosed between the two aluminium plastic composite packaging films, increases the edge sealing area at lug place, two holes is arranged as the usefulness of transport current on its aluminium plastic composite packaging film one side. Battery can conveniently patch equipment, also is convenient to the usefulness of charging.
The utility model overcomes the deficiencies in the prior art, provide a kind of thickness less than the following Ultrathin rechargeable battery of 0.3mm, can be used as on cosmetics, smart card, music greeting card, human epidermal Medicated Permeation film, the paper working power of the low power consumption electronic product such as mobile tag in LED, Electronic Paper, electronic tag, bank card, the Internet of Things. The utility model is equally applicable to extra-thin one-shot battery and electrochemical capacitor.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of the utility model claims.

Claims (10)

1. thin battery, the external packing shell that comprises this battery of battery, electrolyte and encapsulation and electrolyte, described battery comprises stacked positive plate and negative plate mutually, separate by barrier film between described positive plate and the negative plate, it is characterized in that described positive plate comprises collector and the positive electrode material layer that contacts barrier film; Described negative plate comprises collector and the negative electrode material layer that contacts barrier film; Outside the positive and negative plate relative area, the collector of positive and negative plate respectively has a projection, respectively as positive and negative lug; Described external packing shell respectively has an aperture at the correspondence position of positive and negative lug.
2. thin battery according to claim 1 is characterized in that, the collector of described positive pole is the aluminium collector, and described anode ear is provided with chromizing layer.
3. thin battery according to claim 1 is characterized in that, the collector of described negative pole is the copper collector, and described negative electrode lug is provided with nickel coating.
4. thin battery according to claim 1 is characterized in that, described external packing shell comprises the hot melt internal layer.
5. thin battery according to claim 4 is characterized in that, described external packing shell is the aluminium plastic composite packaging film that comprises hot melt coating, aluminium lamination and nylon layer.
6. thin battery according to claim 1 is characterized in that, described positive and negative lug is in the same side of described battery.
7. thin battery according to claim 6 is characterized in that, described external packing shell at the edge sealing of positive and negative lug one side greater than its edge sealing in the thin battery both sides.
8. thin battery according to claim 1 is characterized in that, described positive and negative lug is strip.
9. thin battery according to claim 1 is characterized in that the thickness of described thin battery is less than 0.3mm.
10. thin battery according to claim 1 is characterized in that, the diameter of aperture is 2mm on the described external packing shell.
CN201020504895XU 2010-08-25 2010-08-25 Thin battery Expired - Fee Related CN201838675U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201020504895XU CN201838675U (en) 2010-08-25 2010-08-25 Thin battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201020504895XU CN201838675U (en) 2010-08-25 2010-08-25 Thin battery

Publications (1)

Publication Number Publication Date
CN201838675U true CN201838675U (en) 2011-05-18

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Family Applications (1)

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CN201020504895XU Expired - Fee Related CN201838675U (en) 2010-08-25 2010-08-25 Thin battery

Country Status (1)

Country Link
CN (1) CN201838675U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104377361A (en) * 2014-10-20 2015-02-25 惠州亿纬锂能股份有限公司 Thin diaphragm battery and preparing method thereof
CN104993190A (en) * 2015-05-25 2015-10-21 潍坊天泽新能源有限公司 Combined lithium ion battery module
CN105576280A (en) * 2014-10-09 2016-05-11 东莞新能源科技有限公司 Flexible cell and preparation method thereof
CN112447942A (en) * 2019-08-27 2021-03-05 北京航空航天大学 Square lithium metal battery and preparation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105576280A (en) * 2014-10-09 2016-05-11 东莞新能源科技有限公司 Flexible cell and preparation method thereof
CN104377361A (en) * 2014-10-20 2015-02-25 惠州亿纬锂能股份有限公司 Thin diaphragm battery and preparing method thereof
CN104993190A (en) * 2015-05-25 2015-10-21 潍坊天泽新能源有限公司 Combined lithium ion battery module
CN112447942A (en) * 2019-08-27 2021-03-05 北京航空航天大学 Square lithium metal battery and preparation method thereof

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110518

Termination date: 20190825