CN201918464U - High-magnification cylindrical lithium ion battery - Google Patents
High-magnification cylindrical lithium ion battery Download PDFInfo
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- CN201918464U CN201918464U CN2010206982129U CN201020698212U CN201918464U CN 201918464 U CN201918464 U CN 201918464U CN 2010206982129 U CN2010206982129 U CN 2010206982129U CN 201020698212 U CN201020698212 U CN 201020698212U CN 201918464 U CN201918464 U CN 201918464U
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- lithium ion
- ion battery
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- lug
- negative electrode
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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
Abstract
The utility model discloses a high-magnification cylindrical lithium ion battery, which comprises a positive plate (1.1) with positive tabs (1.1.1), a negative plate (1.2) with negative tabs (1.2.1), diaphragms, a positive external tab (1.3) and a negative external tab (1.4). One diaphragm, the positive plate (1.1), the other diaphragm and the negative plate (1.2) are sequentially stacked and wound to form a cell (1); the positive tabs (1.1.1) are positioned at one end of the cell (1); the negative tabs (1.2.1) are positioned at the other end of the cell (1); all the positive tabs (1.1.1) are connected with the positive external tab (1.3); all the negative tabs (1.2.1) are connected with the negative external tab (1.4); at least three positive tabs (1.1.1) are arranged on the positive plate (1.1); and at least three negative tabs (1.2.1) are arranged on the negative plate (1.2). The high-magnification cylindrical lithium ion battery has lower internal resistance.
Description
Technical field
The utility model relates to a kind of battery, relates to a kind of high-magnification cylindrical type lithium ion battery or rather.
Background technology
Lithium ion battery have average output voltage height, specific energy big, have extended cycle life and advantage such as memory-less effect, thereby be widely used in fields such as mobile communication equipment such as mobile phone, notebook computer, digital camera and video camera and portable electric appts.
The lithium ion battery industry has welcome explosive growth in recent years.Along with continuous advancement in technology and development, market is to the demands for higher performance of lithium ion battery, and for example electric tool requires battery heavy-current discharge at short notice as electric drill etc.; Electric bicycle, electric automobile have obtained giving priority to of national policy, growth momentum is swift and violent, they also need the short time heavy-current discharge when starting, lithium ion battery has become one of main direction of lithium ion battery industry development to the development of motive use type.At present, common lithium ion battery can only satisfy the discharge requirement about 1C, and high multiplying power lithium ion battery is used under the promotion of demand and given birth to.High multiplying power lithium ion battery can be at 10C～20C, even the 25C continuous discharge, has satisfied the instructions for use of this respect substantially.
As everyone knows, the battery of heavy-current discharge all requires lower internal resistance, causes potential safety hazard because high internal resistance not only can cause the rapid rising of internal temperature of battery, and can the capacity of battery can't fully be discharged owing to the increase of ohm voltage drop.At present, the high-magnification cylindrical type lithium ion battery of prior art all is monopole ear or bipolar ear generally, and the internal resistance of monopole ear cylindrical lithium ion battery is bigger, so high rate performance is poor, exists capacity can't fully discharge and problems such as potential safety hazard.And bipolar ear cylindrical lithium ion battery is slightly littler than the internal resistance of monopole ear battery, but high rate performance is still not ideal enough.Bipolar ear high-magnification cylindrical type lithium ion battery discharge-rate generally can reach 10C～20C, the discharge capacity of discharge-rate under 15C, 20C, 25C can only reach 90% of 1C discharge capacity respectively, 78.6%, 32.9%, and with the raising of discharge-rate, the rapid variation of the release of its capacity.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of internal resistance less high-magnification cylindrical type lithium ion battery.
Technical solution of the present utility model is, a kind of high-magnification cylindrical type lithium ion battery with following structure is provided, and comprises the positive plate that has anode ear, the negative plate that has negative electrode lug, barrier film, anodal external lug and the external lug of negative pole; Described barrier film, positive plate, barrier film, negative plate stack successively to reel and form electric core; Described anode ear is positioned at an end of described electric core, and described negative electrode lug is positioned at the other end of described electric core; Described anode ear all is connected with the external lug of described positive pole, and described negative electrode lug all is connected with the external lug of described negative pole, and the anode ear on the described positive plate is at least three, and the negative electrode lug on the described negative plate is at least three.
After adopting above structure, the utility model high-magnification cylindrical type lithium ion battery compared with prior art has the following advantages:
Because the anode ear on the positive plate of the utility model high-magnification cylindrical type lithium ion battery is at least three, negative electrode lug on the described negative plate is at least three, the quantity of anode ear and negative electrode lug is many, and the internal resistance of the battery that the internal resistance of the more battery of lug is lacked than lug is little, because when electrode has a plurality of lug, just being equivalent to several baby batteries macrocell that forms in parallel, is to reduce the effective means of the internal resistance of cell so increase the quantity of lug.Therefore, make that the internal resistance of high-magnification cylindrical type lithium ion battery of the present utility model is less, can eliminate the potential safety hazard that causes greatly owing to internal resistance, the capacity of battery is fully discharged, according to experimental results show that, the discharge-rate of the utility model high-magnification cylindrical type lithium ion battery can reach 15C～25C, discharge-rate reaches 99.3%, 98.7%, 98.1% of 1C discharge capacity respectively in the discharge capacity of 15C, 20C, 25C, along with the rising of discharge-rate, the release of its capacity is kept in balance also.
As a kind of improvement of the present utility model, described anode ear is all one-body molded with described positive plate; Described negative electrode lug is all one-body molded with described negative plate.The anode ear of present battery and negative electrode lug are to be welded on respectively on positive plate and the negative plate, like this on the positive plate on welding electrode ear place and the negative plate welding electrode ear place just can not be coated with active material, thereby make the capacity of battery that very big loss be arranged.And the anode ear of high-magnification cylindrical type lithium ion battery of the present utility model is all one-body molded with described positive plate, negative electrode lug is all one-body molded with described negative plate, can coat active material on all surfaces of positive plate and negative plate, therefore can avoid the loss of battery capacity.
As another kind of improvement the of the present utility model, the distance on the described positive plate between every adjacent two anode ears equates; Distance on the described negative plate between every adjacent two negative electrode lugs equates.The height of described anode ear is 3～6mm, and wide is 2～5mm; The height of described negative electrode lug is 3～6mm, and wide is 2～5mm.Described anode ear is four, and described negative electrode lug is four.This kind is designed to preferred embodiment of the utility model.
Description of drawings
Fig. 1 is the main TV structure schematic diagram of the positive plate of the utility model high-magnification cylindrical type lithium ion battery.
Fig. 2 is the main TV structure schematic diagram of the negative plate of the utility model high-magnification cylindrical type lithium ion battery.
Fig. 3 is the part-structure schematic diagram of the utility model high-magnification cylindrical type lithium ion battery.
Shown in the figure: 1, electric core, 1.1, positive plate, 1.1.1, anode ear, 1.2, negative plate, 1.2.1, negative electrode lug, 1.3, anodal external lug, 1.4, the external lug of negative pole.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please join Fig. 1, Fig. 2 and shown in Figure 3, the utility model high-magnification cylindrical type lithium ion battery comprises the positive plate 1.1 that has anode ear 1.1.1, the negative plate 1.2 that has negative electrode lug 1.2.1, barrier film, anodal external lug 1.3 and the external lug 1.4 of negative pole.Anode ear 1.1.1 on the described positive plate 1.1 is at least three, and in this specific embodiment, described anode ear 1.1.1 is four.Negative electrode lug 1.2.1 on the described negative plate 1.2 is at least three, and in this specific embodiment, described negative electrode lug 1.2.1 is four.Described barrier film, positive plate 1.1, barrier film, negative plate 1.2 stack successively to reel and form electric core.Described anode ear 1.1.1 is positioned at an end of described electric core 1, and described negative electrode lug 1.2.1 is positioned at the other end of described electric core 1.Described anode ear 1.1.1 all is connected with the external lug 1.3 of described positive pole, and described negative electrode lug 1.2.1 all is connected with the external lug 1.4 of described negative pole.
Described anode ear 1.1.1 is all one-body molded with described positive plate 1.1, and described negative electrode lug 1.2.1 is all one-body molded with described negative plate 1.2.Distance on the described positive plate 1.1 between every adjacent two anode ear 1.1.1 equates; Distance on the described negative plate 1.2 between every adjacent two negative electrode lug 1.2.1 equates.The height of described anode ear 1.1.1 is 3～6mm, and wide is 2～5mm; The height of described negative electrode lug 1.2.1 is 3～6mm, and wide is 2～5mm.The external lug 1.3 of described positive pole is an aluminium strip, and the external lug 1.4 of described negative pole is a copper strips.
The manufacturing process of high-magnification cylindrical type lithium ion battery of the present utility model (four lugs) is as follows:
Prepare anode sizing agent by technical recipe; be uniformly coated on the thick aluminium foil of 20 μ m and oven dry; it is thick to be rolled into 85 μ m at last; the strip that is cut into 61 * 858mm obtains positive plate, is as the criterion with collector, cuts out four anode ears with laser cutting machine respectively at 1/5,2/5,3/5/, 4/5 place of pole piece; lug width 4mm; lug height 5mm pastes protective tapes, four positive pole ears are gathered together and extends with aluminium strip welding respectively.
Prepare cathode size by technical recipe; be uniformly coated on the thick Copper Foil of 12 μ m and oven dry; it is thick to be rolled into 100 μ m at last; the strip that is cut into 63 * 912mm obtains negative plate, is as the criterion with collector, cuts out four negative electrode lugs with laser cutting machine respectively at 1/5,2/5,3/5/, 4/5 place of pole piece; lug width 4mm; lug height 5mm pastes protective tapes, four negative lug are gathered together and extends with copper strips welding respectively.
Adopt the thick PP/PE/PP three-decker barrier film of 20 μ m then, press the sequential volume coiled 18650 types electricity core of barrier film, positive pole, barrier film, negative pole.Above-mentioned electric core is put into the metal box hat, and slot rolling, the weldering end, injection electrolyte, weldering are covered, are sealed, and finally are assembled into 18650 cylindrical lithium ion batteries, the making of change into then, partial volume being finished battery.
Bipolar ear high-magnification cylindrical type lithium ion battery and high-magnification cylindrical type lithium ion battery of the present utility model to prior art carry out performance test, and both test result is compared, and particular content is as follows:
Content measurement comprises that the battery behind the forming and capacity dividing is carried out internal resistance test, multiplying power discharging test, cycle performance test and security performance to be tested.
Method of testing:
1, internal resistance test; Measure the internal resistance of battery with internal resistance test device.
2, multiplying power discharging test; 1C CCCV, 4.2V, cut-off current 50mA, dormancy 30min uses 1C then, 5C, 8C, 10C, 15C, 20C, 25C discharges into 2.5V.
3, cycle performance test; 1C CCCV, 4.2V, cut-off current 50mA, dormancy 30min discharges into 2.5V with 20C then, circulates 300 times.
4, security performance test; 3C/10V overcharges test and 150 ℃/30min thermal shock experiment.
Experimental data shows:
The bipolar ear high-magnification cylindrical type lithium ion battery performance of table 1 high-magnification cylindrical type of the present utility model lithium ion battery and prior art relatively
Experimental result:
As can be seen from Table 1, high-magnification cylindrical type lithium ion battery of the present utility model is compared with the bipolar ear high-magnification cylindrical type lithium ion battery of prior art, and internal resistance is little, the capacity height, and cycle performance and security performance are good.The utility model high multiplying power lithium ion battery has all passed through every safety test, the full function admirable of battery.
Claims (5)
1. a high-magnification cylindrical type lithium ion battery comprises the positive plate (1.1) that has anode ear (1.1.1), the negative plate (1.2) that has negative electrode lug (1.2.1), barrier film, anodal external lug (1.3) and the external lug of negative pole (1.4); Described barrier film, positive plate (1.1), barrier film, negative plate (1.2) stack successively to reel and form electric core (1); Described anode ear (1.1.1) is positioned at an end of described electric core (1), and described negative electrode lug (1.2.1) is positioned at the other end of described electric core (1); Described anode ear (1.1.1) all is connected with the external lug of described positive pole (1.3), described negative electrode lug (1.2.1) all is connected with the external lug of described negative pole (1.4), it is characterized in that: the anode ear (1.1.1) on the described positive plate (1.1) is at least three, and the negative electrode lug (1.2.1) on the described negative plate (1.2) is at least three.
2. high-magnification cylindrical type lithium ion battery according to claim 1 is characterized in that: described anode ear (1.1.1) is all one-body molded with described positive plate (1.1); Described negative electrode lug (1.2.1) is all one-body molded with described negative plate (1.2).
3. high-magnification cylindrical type lithium ion battery according to claim 1 and 2 is characterized in that: the distance that described positive plate (1.1) is gone up between whenever adjacent two anode ears (1.1.1) equates; The distance that described negative plate (1.2) is gone up between whenever adjacent two negative electrode lugs (1.2.1) equates.
4. high-magnification cylindrical type lithium ion battery according to claim 3 is characterized in that: the height of described anode ear (1.1.1) is 3～6mm, and wide is 2～5mm; The height of described negative electrode lug (1.2.1) is 3～6mm, and wide is 2～5mm.
5. high-magnification cylindrical type lithium ion battery according to claim 4 is characterized in that: described anode ear (1.1.1) is four, and described negative electrode lug (1.2.1) is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206982129U CN201918464U (en) | 2010-12-29 | 2010-12-29 | High-magnification cylindrical lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206982129U CN201918464U (en) | 2010-12-29 | 2010-12-29 | High-magnification cylindrical lithium ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN201918464U true CN201918464U (en) | 2011-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206982129U Expired - Fee Related CN201918464U (en) | 2010-12-29 | 2010-12-29 | High-magnification cylindrical lithium ion battery |
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| CN (1) | CN201918464U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016187815A1 (en) * | 2015-05-26 | 2016-12-01 | 罗明镜 | Cylindrical high-rate lithium ion battery |
| CN111370639A (en) * | 2020-05-27 | 2020-07-03 | 北京小米移动软件有限公司 | Battery core, manufacturing method thereof and battery |
| CN113922000A (en) * | 2021-09-29 | 2022-01-11 | 珠海冠宇电池股份有限公司 | Winding type battery cell and electrochemical device |
-
2010
- 2010-12-29 CN CN2010206982129U patent/CN201918464U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016187815A1 (en) * | 2015-05-26 | 2016-12-01 | 罗明镜 | Cylindrical high-rate lithium ion battery |
| CN111370639A (en) * | 2020-05-27 | 2020-07-03 | 北京小米移动软件有限公司 | Battery core, manufacturing method thereof and battery |
| CN113922000A (en) * | 2021-09-29 | 2022-01-11 | 珠海冠宇电池股份有限公司 | Winding type battery cell and electrochemical device |
| CN113922000B (en) * | 2021-09-29 | 2023-08-22 | 珠海冠宇电池股份有限公司 | Winding type battery cell and electrochemical device |
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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: 20110803 Termination date: 20131229 |