CN202050030U - Lithium ion battery with high-multiplying-power discharge performance - Google Patents
Lithium ion battery with high-multiplying-power discharge performance Download PDFInfo
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- CN202050030U CN202050030U CN2011201628715U CN201120162871U CN202050030U CN 202050030 U CN202050030 U CN 202050030U CN 2011201628715 U CN2011201628715 U CN 2011201628715U CN 201120162871 U CN201120162871 U CN 201120162871U CN 202050030 U CN202050030 U CN 202050030U
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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
Abstract
The utility model relates to a lithium iron battery with high-multiplying-power discharge performance, which comprises a shell, and an electric core placed in the shell, wherein the electric core is formed by coiling a positive pole sheet, a negative pole sheet and a separating film; three or more positive pole lugs are arranged on the positive pole sheet while negative pole lugs are arranged on the negative pole sheet; each positive pole lug is formed by overlapping and welding one or more pole lugs; the positive pole lugs are exposed outside in different lengths; the amount of the negative pole lugs is the same as that of the positive pole lugs; each negative pole lug is formed by overlapping and welding one or more pole lugs, and the negative pole lugs are exposed outside in different lengths; and the positive pole sheet is completely wrapped by the negative pole sheet. The lithium iron battery with the high-multiplying-power discharge performance has the advantages that the electric core satisfies requirements on low internal resistance and high-multiplying-power discharge of square and columned lithium ion sub-batteries having coiling structure; the lithium iron battery with the high-multiplying-power discharge performance has simple design process, and is easy for batch production; and the amount of the pole lugs can be increased or decreased according to the requirements on the structure size, dimension and discharge current intensity of the battery.
Description
Technical field
The utility model relates to a kind of lithium rechargeable battery, especially a kind of lithium ion battery with high-multiplying power discharge characteristic.
Background technology
Lithium ion battery has that self-discharge rate is low, the good characteristic of good cycle, is developed rapidly in recent years and uses.Many electric tools and battery corollary equipment producer improve constantly the requirement of lithium rechargeable battery, need moment to start as lithium cell charging formula electric drill, driver, electric screwdriver etc., so need to provide big electric current to equipment.The condition of reducing and face exhaustion gradually along with non-renewable energy resources such as oil, gasoline, so need a kind of cleaning more, reproducible energy substitution, along with the practicality of lithium rechargeable battery in the electric bicycle industry, and it is ripe gradually, electronic taxi, electronic big bus, hybrid vehicle be using of small lot also, and these electric vehicles are starting, climb, also needing moment that heavy-current discharge can be provided when quickening.
The electrode slice design of existing traditional lithium rechargeable battery has only single positive pole ear and single negative lug, the battery of this structure is not under little multiplying power or multiplying power are very high discharge scenario, influence is not clearly to energy content of battery density in the internal resistance of battery, but polarization phenomena are serious when high-multiplying power discharge, because the pressure drop that polarization causes makes cell voltage low to the battery limiting voltage down in limited time, the energy that can reduce battery discharges, if internal resistance is when excessive, can cause when big multiplying power discharging that battery temperature is too high to have little time to dispel the heat and damage the inside battery structure and reduce the electrical property and the security performance of battery.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of lithium ion battery with high-multiplying power discharge characteristic is provided, and is a kind of lithium rechargeable battery with low internal resistance, high-multiplying power discharge characteristic.
According to the technical scheme that the utility model provides, a kind of lithium ion battery with high-multiplying power discharge characteristic comprises housing and is positioned at the electric core of housing, described electric core by anode pole piece, cathode pole piece, membrane coil around forming; Described anode pole piece is provided with positive pole ear, and described cathode pole piece is provided with negative lug, and the quantity of described positive pole ear is more than three, and each positive pole ear is welded by one or more lugs are overlapping respectively, the protruded length difference of each positive pole ear; The quantity of described negative lug is identical with positive pole ear, and each negative lug is welded by one or more lugs are overlapping respectively, the protruded length difference of each negative lug; Described cathode pole piece encases anode pole piece fully.
As preferably, the width of described cathode pole piece sheet subtracts the width 〉=0.5mm of anode pole piece.Described positive pole ear comprises first positive pole ear, second positive pole ear and the 3rd positive pole ear, described first positive pole ear, second positive pole ear and the 3rd positive pole ear are welded by one or more lugs are overlapping respectively, the protruded length difference of first positive pole ear, second positive pole ear, the 3rd positive pole ear; Described negative lug comprises first negative lug, second negative lug and the 3rd negative lug, described first negative lug, second negative lug and the 3rd negative lug are welded by one or more lugs are overlapping respectively, the protruded length difference of first negative lug, second negative lug, the 3rd negative lug.
The utility model has the advantages that: electric core of the present utility model is applicable to the square of winding-structure and the battery design that the low internal resistance of cylinder type lithium ion secondary battery, high-multiplying power discharge require; Its design technology is simple, and is easy and simple to handle, produces in batches easily; The increase of lug or reduce and to change along with the requirement of size, size and the discharging current size of the structure of battery.
Description of drawings
Fig. 1 is the utility model negative pole piece of battery project organization figure.
Fig. 2 is the utility model anode pole piece project organization figure.
Fig. 3 is core strueture figure of the present utility model.
Fig. 4 is the utility model embodiment and comparative example cyclic curve figure.
Fig. 5 is a tables of data before and after the utility model embodiment and the circulation of comparative example battery.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Lithium ion battery mainly is made up of positive plate, negative plate, nonaqueous electrolytic solution, barrier film and shell.Be inserted in the battery case at pole piece, inject nonaqueous electrolytic solution and package sealing and finish, then with the battery forming and capacity dividing.
Lithium ion battery described in the utility model comprises housing and is positioned at the electric core of housing, described electric core by anode pole piece, cathode pole piece, membrane coil around forming; As shown in Figure 3, described anode pole piece is provided with positive pole ear, described cathode pole piece is provided with negative lug, described positive pole ear comprises first positive pole ear 1, second positive pole ear 2 and the 3rd positive pole ear 3, described first positive pole ear 1, second positive pole ear 2 and the 3rd positive pole ear 3 are welded by one or more lugs are overlapping respectively, the protruded length difference of 3 positive pole ears is as the protruded length+4mm of protruded length+2mm=first positive pole ear of protruded length=second positive pole ear of the 3rd positive pole ear.Described negative lug comprises first negative lug 4, second negative lug 5 and the 3rd negative lug 6, described first negative lug 4, second negative lug 5 and the 3rd negative lug 6 are welded by one or more lugs are overlapping respectively, the protruded length difference of 3 negative lug is as the protruded length+4mm of protruded length+2mm=first negative lug of protruded length=second negative lug of the 3rd negative lug; Described cathode pole piece encases anode pole piece fully.
Positive pole ear and the negative lug of the design of the electrode slice of this battery more than three or three, and effectively distribute and contraposition, the lithium rechargeable battery that adopts this method to make, internal resistance is significantly reduced, and electric current distribution is even, high-rate discharge ability will obviously promote, and can satisfy the requirement of high-multiplying power discharge equipment, as electric tool, electric automobile, hybrid vehicle etc.
As Fig. 1, shown in 2, multipole ear design of the present utility model comprises: first positive pole ear 1, second positive pole ear 2, the 3rd positive pole ear 3, negative lug and positive pole roughly the same comprise first negative lug 4, second negative lug 5 and the 3rd negative lug 6.X, Y, Z represent the protruded length of negative lug, Z=Y+2=X+4, L=A1+A2+B+C+3d among Fig. 1, the blank of reserving when d is coating, so that welding is used, d is of a size of 2mm～25mm, W is the width of negative plate, and the W value designs according to the overall height of battery.
P, Q, F represent the protruded length of positive pole ear, F=Q+2=F+4, L1=D1+D2+E+F+3k among Fig. 2, the blank of reserving when k is coating, so that welding is used, k is of a size of 2mm～25mm, W2 is the width of positive plate, and the W2 value designs according to the overall height of battery.W-W2≥0.5mm。
First negative lug 4, second negative lug 5 and the 3rd negative lug 6 are the nickel sheet, nickel plating copper sheet, copper sheet, copper nickel compound piece, multilayer copper foil welding or the lead-out tablet that is riveted together and makes, first positive pole ear 1, second positive pole ear 2, the 3rd positive pole ear 3 are aluminium flake, laminated aluminium foil welding or the lead-out tablet that is riveted together and makes.
Above-mentioned pole piece is reeled in the following manner: in the volume pin of at first cathode pole piece being reeled earlier, head rolls up length at 0.5～2.5 circle, the corresponding D2 fragment position of A2 section, the corresponding F section of B section, C section correspondence E section, A1 section correspondence D1 section.After coiling finishes, electric core is cemented, enter next process with stopping adhesive tape.The welding position of positive pole ear distributes according to the contraposition position of above-mentioned design, and the principle of distribution requires to carry out according to the output density of electric current, and the method for designing of negative pole is with anodal consistent.
Described anode pole piece material is aluminium foil or aluminium net, and the cathode pole piece material is Copper Foil or copper mesh.
Manufacture craft is: with the PVDF (Kynoar) of ormal weight, put among the NMP (N-methyl pyrrolidone), start beater, and be dissolved in PVDF among the NMP fully by certain speed, LiFePO 4 material is added in this solution, fully be mixed and made into slurry, it consists of LiFePO
4: PVDF: acetylene black: Super-P (super carbon black)=91: 4: 3: 2.Again the method for this slurry with intermittently coating is coated on the aluminium foil of 18 μ m equably, dry down in 100 ℃.Obtain the positive plate that thickness is 100 μ m after the roll-in, the position of k welding 5*0.15 aluminium pole ears in as Fig. 2.
PVDF (Kynoar) with ormal weight, put in the pure water, start beater, and be dissolved in PVDF in the pure water fully by certain speed, MCMB (carbonaceous mesophase spherules) is added in this solution, fully be mixed and made into slurry, it consists of MCMB: PVDF: VGCF (nanometer overlength carbon fiber)=95: 4: 1.Again the method for this slurry with intermittently coating is coated on the Copper Foil of 12 μ m equably, dry down in 100 ℃.Obtain the negative plate that thickness is 90 μ m after the roll-in, the position of d welding 4*0.10 copper polar ear in as Fig. 1.
Above-mentioned positive and negative plate is wound into the electric core of lithium ion battery, and is inserted in the shell, spot welding, electrolyte injects battery case and makes the lithium rechargeable battery that model is IFR26650.
Comparative example of the present utility model uses and the similar prepared battery of present embodiment, but does not have three lugs, makes the IFR26650 lithium ion battery but carry out the monopole ear welding procedure in any lug position of three lugs.
Below be that test of embodiment and comparative example cycle performance of battery and related data compare.
One, cycle performance test.
The battery that adopts above-mentioned three lugs and monopole ear to produce change into and partial volume after, embodiment and comparative example battery are carried out volume test as follows:
(1) under 22 ℃ of environment, with the 1C constant-current constant-voltage charging, requiring upper voltage limit is 3.9V, and cut-off current 0.05C shelved 5 minutes;
(2) with the 20C constant-current discharge to 2.0V, shelved 5 minutes;
(3) repeat above step 500 time, the capacity sustainment rate that records embodiment and comparative example as shown in Figure 5.
In the foregoing description, after 500 circulations of battery, the capacity sustainment rate is 98.7%; In the Comparative Examples, after 370 circulations of battery, the capacity sustainment rate has only about 84.5%, is illustrated in figure 4 as and improves the front and back battery cycle life relatively, and a is a monopole ear 4A discharge cycles curve, and b is three lug 4A discharge cycles curves.
Two, loop test internal resistance performance.
Use internal resistance test device accurately to measure embodiment and comparative example internal resistance of cell value, under 22 ℃ of environment, internal resistance of cell value is accurately measured in battery circulation 500 times once more, and test result as shown in Figure 5.
In a word, compare, the utlity model has following advantage with existing lithium-ion electric pool technology:
1, behind the multipole ear, the current density of discharge will increase, and discharging current is evenly distributed, and is particularly suitable for heavy-current discharge;
2, by improving multipole ear polarization is influenced low effect, thereby improve cycle performance, heavy-current discharge performance and the security performance etc. of battery;
3, guided sense of current, on the pole piece of unit effective area, the mobile distance of multipole ear design shortening electric current has further improved power output;
4, this battery still can continue to use after situation about being short-circuited, and the rated capacity of battery changes little.
Claims (3)
1. lithium ion battery with high-multiplying power discharge characteristic comprises housing and is positioned at the electric core of housing, described electric core by anode pole piece, cathode pole piece, membrane coil around forming; Described anode pole piece is provided with positive pole ear, described cathode pole piece is provided with negative lug, it is characterized in that: the quantity of described positive pole ear is more than three, and each positive pole ear is welded by one or more lugs are overlapping respectively, the protruded length difference of each positive pole ear; The quantity of described negative lug is identical with positive pole ear, and each negative lug is welded by one or more lugs are overlapping respectively, the protruded length difference of each negative lug; Described cathode pole piece encases anode pole piece fully.
2. a kind of according to claim 1 lithium ion battery with high-multiplying power discharge characteristic is characterized in that the width of described cathode pole piece subtracts the width 〉=0.5mm of anode pole piece.
3. a kind of according to claim 1 lithium ion battery with high-multiplying power discharge characteristic, it is characterized in that described positive pole ear comprises first positive pole ear, second positive pole ear and the 3rd positive pole ear, described first positive pole ear, second positive pole ear and the 3rd positive pole ear are welded by one or more lugs are overlapping respectively, the protruded length difference of first positive pole ear, second positive pole ear, the 3rd positive pole ear; Described negative lug comprises first negative lug, second negative lug and the 3rd negative lug, described first negative lug, second negative lug and the 3rd negative lug are welded by one or more lugs are overlapping respectively, the protruded length difference of first negative lug, second negative lug, the 3rd negative lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201628715U CN202050030U (en) | 2011-05-20 | 2011-05-20 | Lithium ion battery with high-multiplying-power discharge performance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201628715U CN202050030U (en) | 2011-05-20 | 2011-05-20 | Lithium ion battery with high-multiplying-power discharge performance |
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| CN202050030U true CN202050030U (en) | 2011-11-23 |
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| CN2011201628715U Expired - Fee Related CN202050030U (en) | 2011-05-20 | 2011-05-20 | Lithium ion battery with high-multiplying-power discharge performance |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102227031A (en) * | 2011-05-20 | 2011-10-26 | 无锡市明杨电池有限公司 | Lithium ion battery with high-rate discharge characteristic |
| CN105161673A (en) * | 2015-10-23 | 2015-12-16 | 东莞市致格电池科技有限公司 | Producing process of multi-tab battery cell and multi-tab battery |
| CN110364659A (en) * | 2018-03-26 | 2019-10-22 | 华硕电脑股份有限公司 | The manufacturing method of coiled battery |
| CN112117496A (en) * | 2020-09-17 | 2020-12-22 | 湖北亿纬动力有限公司 | Manufacturing method of laminated battery cell, laminated battery cell and lithium battery |
| CN112117498A (en) * | 2020-09-17 | 2020-12-22 | 湖北亿纬动力有限公司 | Manufacturing method of winding type battery cell, winding type battery cell and lithium battery |
-
2011
- 2011-05-20 CN CN2011201628715U patent/CN202050030U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102227031A (en) * | 2011-05-20 | 2011-10-26 | 无锡市明杨电池有限公司 | Lithium ion battery with high-rate discharge characteristic |
| CN105161673A (en) * | 2015-10-23 | 2015-12-16 | 东莞市致格电池科技有限公司 | Producing process of multi-tab battery cell and multi-tab battery |
| CN110364659A (en) * | 2018-03-26 | 2019-10-22 | 华硕电脑股份有限公司 | The manufacturing method of coiled battery |
| CN112117496A (en) * | 2020-09-17 | 2020-12-22 | 湖北亿纬动力有限公司 | Manufacturing method of laminated battery cell, laminated battery cell and lithium battery |
| CN112117498A (en) * | 2020-09-17 | 2020-12-22 | 湖北亿纬动力有限公司 | Manufacturing method of winding type battery cell, winding type battery cell and lithium battery |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 214117 Gan Lu Cai Wan Village, Xishan, Wuxi, Jiangsu Patentee after: Wuxi Mingyang new energy Co., Ltd. Address before: 214117 Gan Lu Industrial Park, Xishan, Wuxi, Jiangsu Patentee before: Wuxi Ming Yang Battery Co., Ltd. |
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| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111123 Termination date: 20200520 |
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| CF01 | Termination of patent right due to non-payment of annual fee |