CN104934563A - Cylindrical lithium battery - Google Patents
Cylindrical lithium battery Download PDFInfo
- Publication number
- CN104934563A CN104934563A CN201510255184.0A CN201510255184A CN104934563A CN 104934563 A CN104934563 A CN 104934563A CN 201510255184 A CN201510255184 A CN 201510255184A CN 104934563 A CN104934563 A CN 104934563A
- Authority
- CN
- China
- Prior art keywords
- pole piece
- lithium battery
- positive pole
- cylindrical lithium
- negative lug
- 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.)
- Pending
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Classifications
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/431—Inorganic material
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/44—Fibrous material
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a cylindrical lithium battery. The cylindrical lithium battery comprises a nut cap, a shell, a battery cell and an electrolyte, wherein the nut cap is mounted on the top of the shell; the battery cell is formed by winding a positive pole piece, a negative pole piece and a membrane together; the negative pole piece and the positive pole piece are separated by using the membrane; the positive pole piece is welded with positive pole lugs; the negative pole piece is welded with negative pole lugs; the positive pole lugs are welded with the nut cap; and the negative pole lugs are welded with the bottom of the shell. The cylindrical lithium battery is characterized in that the negative pole lugs comprise a first negative pole lug and a second negative pole lug; and the two positive pole lugs comprise a first positive pole lug and a second positive pole lug respectively. After the two pole lugs are arranged on the positive pole and the negative pole of the lithium battery respectively, the internal resistance of the lithium battery is reduced by 2/3, the calorific capacity is reduced, and the polarization of the battery is also reduced, so that the discharging rate of the lithium battery is greatly improved, the cycle life of the lithium battery is greatly prolonged, and the output power of the lithium battery is increased.
Description
Technical field
The present invention relates to field of lithium, particularly a kind of cylindrical lithium battery.
Background technology
Lithium ion battery has the advantages such as capacity is high, volume is little, lightweight, can form lithium battery group by after multi-section lithium ion battery series-parallel connection.Battery pack is then applied to many fields with its higher capacity and multiplying power, such as, in electric bicycle, electric tool, electric bus and energy storage base station etc., can use Li-ion batteries piles and replace traditional lead-acid battery.There are positive pole and negative pole in the battery core inside of lithium battery, needs positive pole ear to be connected with block and box hat with negative pole by the positive pole in battery core with negative lug.
In prior art, the positive pole of the battery core of general lithium battery and negative pole arrange a positive pole ear and negative lug respectively, or positive pole arranges a lug, and negative pole designs two lugs.And the choice of material of negative lug is nickel strap, when these two kinds of structures are used for power tool battery, the internal resistance of lithium battery just seems excessive, makes the discharge-rate of lithium battery less, causes being short of power of electric tool.
Summary of the invention
The present invention, for making up the deficiencies in the prior art, provides a kind of cylindrical lithium battery, the internal resistance of battery can be made to decline, provide larger discharge-rate.
The present invention adopts following technical scheme:
A kind of cylindrical lithium battery, comprise block, shell, battery and electrolyte, housing top end installs block, battery is made up of together with membrane winding anode pole piece, cathode pole piece, barrier film is used to separate between cathode pole piece and anode pole piece, anode pole piece welding positive pole ear, cathode pole piece welding negative lug, positive pole ear welds with block, the bottom welding of negative lug and shell, it is characterized in that: negative lug comprises the first negative lug, positive pole ear is provided with two, is respectively the first positive pole ear, the second positive pole ear.
Preferred version is, negative lug also comprises the second negative lug.
First negative lug and the second negative lug are located at the two ends of cathode pole piece respectively.
First positive pole ear and the second positive pole ear are distributed in the mid portion of anode pole piece.
First positive pole ear and the second positive pole ear lay respectively at 1/3 place and 2/3 place of anode pole piece.
Described barrier film is aluminium oxide ceramics coating barrier film, and barrier film base material is PP and polypropylene.
Block is PP erect type dynamic structure.
Anode pole piece comprises plus plate current-collecting body aluminium foil, anode pole piece scribbles and is mixed with VGCF(vapor deposition carbon fiber) high magnification nickel-cobalt-manganese ternary material coating.
Cathode pole piece comprises negative current collector Copper Foil, cathode pole piece scribbles and is mixed with VGCF(vapor deposition carbon fiber) high magnification electrographite material coating.
The soft state copper strips of negative lug material selection, the soft state aluminium strip of positive pole ear material selection.
The invention has the beneficial effects as follows, after lithium battery both positive and negative polarity arranges two lugs respectively, the internal resistance of lithium battery declines 2/3, and caloric value reduces, and reduces battery polarization simultaneously, thus the discharge-rate of lithium battery and cycle life are increased considerably, increase the power output of lithium battery, if lug is added further again, will positive pole ear and block be increased, between negative lug with box hat, weld difficulty, reduce rate of finished products, be not suitable for large-scale production.
Accompanying drawing explanation
Fig. 1 is that anode pole piece of the present invention launches schematic diagram, and Fig. 2 is that cathode pole piece launches schematic diagram, and Fig. 3 is the overall schematic after rolling.Fig. 4 is block schematic diagram.
In figure, 1 anode pole piece, 2 cathode pole pieces, 21 first negative lug, 22 second negative lug, 11 first positive pole ears, 12 second positive pole ears.3 upper covers, 4 explosion-proof aluminium flakes, 5 sealing rings, 6 aluminium rings, 7 little aluminium flakes, 8 pads.
Embodiment
Accompanying drawing is a kind of specific embodiment of the present invention.
A kind of cylindrical lithium battery, comprise block, shell, battery and electrolyte, housing top end installs block, battery and electrolyte cased, shell is box hat, battery is by anode pole piece 1, cathode pole piece 2 is formed together with membrane winding, barrier film is used to separate between cathode pole piece and anode pole piece, prevent short circuit, anode pole piece welding positive pole ear, cathode pole piece welding negative lug, positive pole ear welds with block, the bottom welding of negative lug and shell, negative lug comprises the first negative lug 21, positive pole ear is provided with two, be respectively the first positive pole ear 11, second positive pole ear 12.
Preferred version is, negative lug also comprises the second negative lug 22.
First negative lug 21 and the second negative lug 22 are located at the two ends of cathode pole piece 2 respectively.
First positive pole ear 11 and the second positive pole ear 12 are distributed in the mid portion of anode pole piece.
First positive pole ear 11 and the second positive pole ear 12 lay respectively at 1/3 place and 2/3 place of anode pole piece.
Described barrier film is aluminium oxide ceramics coating barrier film, and barrier film base material is PP and polypropylene.
Block is PP erect type dynamic structure.
Anode pole piece comprises plus plate current-collecting body aluminium foil, aluminium foil scribbles and is mixed with VGCF(vapor deposition carbon fiber) high magnification cobalt nickel lithium manganate ternary material coating.
Cathode pole piece comprises negative current collector Copper Foil, Copper Foil scribbles and is mixed with VGCF(vapor deposition carbon fiber) high magnification electrographite material coating.
The soft state copper strips of negative lug material selection, the soft state aluminium strip of positive pole ear material selection.
First positive pole pole lug and the second positive pole pole lug are located at the mid portion of anode pole piece.Before anode pole piece is rolled, between two lugs and two lugs all have a segment distance to pole piece two ends, after anode pole piece is rolled, by adjust anode pole piece cut position, two positive pole ear positions can be made in same direction, conveniently can weld block like this.
First negative lug and the second negative lug are located at the two ends of cathode pole piece.Before cathode pole piece is rolled, the first negative lug and the second negative lug are positioned at the two ends of cathode pole piece, and after cathode pole piece is rolled, the first negative lug and the second negative lug lay respectively at edge and the center of battery core.
Barrier film is aluminium oxide ceramics coating barrier film.Aluminium oxide ceramics coating barrier film has heat-resisting quantity; High security; High power is forthright; Good wettability; Unique in turn-off characteristic; Low self-discharge rate; The feature such as have extended cycle life.
Block is erect type dynamic structure, and this structure can ensure the discharge-rate of battery, improves sealing during battery seal simultaneously.Block comprise connect successively from top to bottom steel upper cover 3, aluminium ring 6, middle part is to explosion-proof aluminium flake 4, the little aluminium flake 7 in bottom of lower convexity, accompany PP plastic spacer 8 between the edge of explosion-proof aluminium flake and little aluminium flake, upper cover, thermosensitive resistor film, explosion-proof aluminium flake, pad and little aluminium flake are embedded in the different circular tube shaped PP plastic seal ring 5 in aperture, upper and lower two ends from top to bottom.
Cathode pole piece is provided with two lugs at pole piece two ends, and described anode pole piece is respectively equipped with a lug at pole piece 1/3 place and 2/3 place.After lithium battery both positive and negative polarity arranges two lugs respectively, the internal resistance of lithium battery declines 2/3, caloric value reduces, reduce battery polarization simultaneously, thus the discharge-rate of lithium battery and cycle life are increased considerably, increase the power output of lithium battery, if lug is added further again, by increasing positive pole ear and block, welding difficulty between negative lug with box hat, reduce rate of finished products, be not suitable for large-scale production.
The part by weight of ternary material nickel manganese cobalt current domestic at most have three kinds: 5:3:2,4:4:2,1:1:1.The ratio of 1:1:1 is preferentially used during heavy-current discharge.
VGCF is conductive additive, can increase the cycle life of battery, increases multiplying power discharging property, price comparison is high, so general addition is the 1%-2% of active material, bonding agent, conductive agent three weight, bonding agent accounts for the 2-5% of three's weight, and surplus is active material.
The positive electrode active materials of the coating on anode pole piece is nickle cobalt lithium manganate, and bonding agent is Kynoar PVDF, and conductive agent is VGCF.The negative active core-shell material of the coating on cathode pole piece is electrographite, and bonding agent is Kynoar PVDF, or SBR(butadiene-styrene rubber)+CMC(sodium carboxymethylcellulose), conductive agent is VGCF.
Claims (10)
1. a cylindrical lithium battery, comprise block, shell, battery and electrolyte, housing top end installs block, battery is by anode pole piece (1), cathode pole piece (2) and membrane winding are formed together, barrier film is used to separate between cathode pole piece and anode pole piece, anode pole piece welding positive pole ear, cathode pole piece welding negative lug, positive pole ear welds with block, the bottom welding of negative lug and shell, it is characterized in that: negative lug comprises the first negative lug (21), positive pole ear is provided with two, be respectively the first positive pole ear (11), second positive pole ear (12).
2. cylindrical lithium battery according to claim 1, is characterized in that: negative lug also comprises the second negative lug (22).
3. according to the cylindrical lithium battery described in claim 2, it is characterized in that: the first negative lug (21) and the second negative lug (22) are located at the two ends of cathode pole piece (2) respectively.
4. the cylindrical lithium battery according to claim 1,2 or 3, is characterized in that: the first positive pole ear (11) and the second positive pole ear (12) are distributed in the mid portion of anode pole piece.
5. according to a kind of cylindrical lithium battery described in claim 4, it is characterized in that: the first positive pole ear (11) and the second positive pole ear (12) lay respectively at 1/3 place and 2/3 place of anode pole piece.
6. a kind of cylindrical lithium battery according to claim 1 or 2 or 3, is characterized in that: described barrier film is aluminium oxide ceramics coating barrier film, and barrier film base material is PP and polypropylene.
7. a kind of cylindrical lithium battery according to claim 1 or 2 or 3, is characterized in that: block a shot as PP erect type dynamic structure.
8. a kind of cylindrical lithium battery according to claim 1 or 2 or 3, is characterized in that: anode pole piece comprises plus plate current-collecting body aluminium foil, anode pole piece scribbles and is mixed with VGCF(vapor deposition carbon fiber) high magnification nickel-cobalt-manganese ternary material coating.
9. a kind of cylindrical lithium battery according to claim 1 or 2 or 3, is characterized in that: cathode pole piece comprises negative current collector Copper Foil, cathode pole piece scribbles and is mixed with VGCF(vapor deposition carbon fiber) high magnification electrographite material coating.
10. a kind of cylindrical lithium battery according to claim 1 or 2 or 3, is characterized in that: the soft state copper strips of negative lug material selection, the soft state aluminium strip of positive pole ear material selection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510255184.0A CN104934563A (en) | 2015-05-19 | 2015-05-19 | Cylindrical lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510255184.0A CN104934563A (en) | 2015-05-19 | 2015-05-19 | Cylindrical lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104934563A true CN104934563A (en) | 2015-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510255184.0A Pending CN104934563A (en) | 2015-05-19 | 2015-05-19 | Cylindrical lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104934563A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449322A (en) * | 2018-12-21 | 2019-03-08 | 河南鼎能电子科技有限公司 | A kind of novel lithium battery with super thin metal shell |
| CN110518186A (en) * | 2019-09-03 | 2019-11-29 | 江西迪比科股份有限公司 | A kind of Double-pole lug low internal resistance Li-ion secondary cell |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201956433U (en) * | 2011-03-24 | 2011-08-31 | 宁波海锂子新能源有限公司 | Cylindrical ultralow temperature lithium ion battery |
| CN202662698U (en) * | 2012-05-07 | 2013-01-09 | 宁德新能源科技有限公司 | Cylindrical lithium ion battery |
| CN202996949U (en) * | 2012-11-01 | 2013-06-12 | 浙江天能能源科技有限公司 | Power-type lithium ion battery |
| CN103296245A (en) * | 2013-05-02 | 2013-09-11 | 浙江努奥罗新能源科技有限公司 | Cylinder lithium battery |
-
2015
- 2015-05-19 CN CN201510255184.0A patent/CN104934563A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201956433U (en) * | 2011-03-24 | 2011-08-31 | 宁波海锂子新能源有限公司 | Cylindrical ultralow temperature lithium ion battery |
| CN202662698U (en) * | 2012-05-07 | 2013-01-09 | 宁德新能源科技有限公司 | Cylindrical lithium ion battery |
| CN202996949U (en) * | 2012-11-01 | 2013-06-12 | 浙江天能能源科技有限公司 | Power-type lithium ion battery |
| CN103296245A (en) * | 2013-05-02 | 2013-09-11 | 浙江努奥罗新能源科技有限公司 | Cylinder lithium battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109449322A (en) * | 2018-12-21 | 2019-03-08 | 河南鼎能电子科技有限公司 | A kind of novel lithium battery with super thin metal shell |
| CN110518186A (en) * | 2019-09-03 | 2019-11-29 | 江西迪比科股份有限公司 | A kind of Double-pole lug low internal resistance Li-ion secondary cell |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150923 |
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| RJ01 | Rejection of invention patent application after publication |