CN106784582A - Suitable for the lithium ion battery and pole piece of big multiplying power discharging - Google Patents
Suitable for the lithium ion battery and pole piece of big multiplying power discharging Download PDFInfo
- Publication number
- CN106784582A CN106784582A CN201710136024.3A CN201710136024A CN106784582A CN 106784582 A CN106784582 A CN 106784582A CN 201710136024 A CN201710136024 A CN 201710136024A CN 106784582 A CN106784582 A CN 106784582A
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- China
- Prior art keywords
- interlude
- paragraph
- segment
- width
- lithium ion
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- 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.)
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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 present invention relates to lithium ion battery, a kind of lithium ion battery and pole piece suitable for big multiplying power discharging is disclosed.Battery includes battery core bodies, and lug is welded with battery core bodies electrode, and lug includes：One metal tape and tab, metal tape includes the first paragraph positioned at two ends, second segment, and the interlude between first paragraph and second segment, tab is pasted onto the two sides of interlude, the width of tab is wider than the width of interlude, first paragraph, the thickness of second segment is thinner than the thickness of interlude, first paragraph is located in the aluminum plastic film housing of battery core bodies, it is connected with the electrode welding of battery core bodies, interlude runs through aluminum plastic film housing, tab is melting sealed with the aluminum plastic film on its both sides to be combined together, make metal tape and aluminum plastic film shell body phase insulation, second segment is stretched out outside aluminum plastic film housing.The temperature of battery is advantageously reduced using the technical scheme, its discharge performance is improved.
Description
Technical field
The present invention relates to lithium ion battery manufacture field, more particularly to a kind of lithium ion battery suitable for big multiplying power discharging
And pole piece.
Background technology
In recent years, with the fast development of model plane, electric tool and electronic toy, to the multiplying power discharging of lithium ion battery
Continuous discharge more than also more and more higher, but the lithium ion battery 20C multiplying powers difficult to realize of commercialization at present can be required, its is main
Reason be battery in big multiplying power discharging, lug heating is serious, and battery bulk temperature is too high so that the easy thermal runaway of battery, from
And cause battery multiplying power discharging property and cycle performance to be deteriorated.
The present invention has found that lug is that battery is exported to the load of outside energy transmission in research process of the present invention is carried out
Body, so during the big multiplying power discharging of battery, the current-carrying capacity for improving lug can be effectively improved the multiplying power discharging of battery at the electric discharge initial stage
Performance.
Fig. 1,2 are the extreme ear structure of the lithium ion battery of prior art, referring to shown in Fig. 1,2, the width of lug by lithium from
The width limitation of the lug external part on sub- battery, lug includes metal tape 101 and is pasted onto the middle part two sides of metal tape 101
Tab 102, the width of tab 102 is more than the width of metal tape 101, wherein one end of metal tape 101 and cell aluminum-plastic membrane shell
Internal electrode welding connection, the other end stretches out from aluminum plastic film housing, the tab 102 and aluminum plastic film at the middle part of metal tape 101
It is melting sealed to be combined together.
The content of the invention
The first purpose of the embodiment of the present invention is to provide a kind of lithium ion battery and pole suitable for big multiplying power discharging
Piece, the temperature of battery is advantageously reduced using the technical scheme, improves its discharge performance.
The embodiment of the present invention provides a kind of lithium ion battery, including battery core bodies, and pole is welded with the battery core bodies electrode
Ear, the lug includes：One metal tape and tab, it is characterized in that,
The metal tape include positioned at the first paragraph of two ends, second segment and positioned at the first paragraph and second segment it
Between interlude,
The tab is pasted onto the two sides of the interlude, and the width of the tab is wider than the width of the interlude
Degree, the first paragraph, the thickness of second segment are thinner than the thickness of the interlude,
The first paragraph is located in the aluminum plastic film housing of the battery core bodies, and the electrode welding with the battery core bodies is connected, institute
Interlude is stated through the aluminum plastic film housing, the tab is melting sealed with the aluminum plastic film on its both sides to be combined together, and makes institute
Metal tape and the aluminum plastic film shell body phase insulation are stated, the second segment is stretched out outside the aluminum plastic film housing.
Alternatively, the width of the width more than the interlude of the first paragraph, second segment.
Alternatively, the first paragraph, the thickness of second segment are 2 millimeters, and the thickness of the interlude is 3 millimeters, described
The error of thickness is positive and negative 0.02 millimeter.
Alternatively, the width of the width more than or equal to the tab of the first paragraph, second segment.
Alternatively, the lithium ion battery is laminated batteries.
A kind of pole piece suitable for laminated lithium ion battery provided in an embodiment of the present invention, the lug includes：One gold medal
Category band and tab,
The metal tape include positioned at the first paragraph of two ends, second segment and positioned at the first paragraph and second segment it
Between interlude,
The tab is pasted onto the two sides of the interlude, and the width of the tab is wider than the width of the interlude
Degree, the first paragraph, the thickness of second segment are thinner than the thickness of the interlude.
Alternatively, the width of the width more than the interlude of the first paragraph, second segment.
Alternatively, the first paragraph, the thickness of second segment are 2 millimeters, and the thickness of the interlude is 3 millimeters, described
The error of thickness is positive and negative 0.02 millimeter.
Alternatively, the width of the width more than or equal to the tab of the first paragraph, second segment.
Therefore, battery employs the thicker metal tape of interlude thickness as lug, during big multiplying power discharging,
Near the temperature highest in lug region, therefore this subregion produces substantial amounts of Joule heat, causes temperature to rise too fast, and uses
ND-3, ND-4, the battery structure of battery can increase the current-carrying capacity of lug, can effectively reduce the electrochemistry pole in lug region
Change, slow down the rising of battery surface temperature, thus improve the security performance of battery.Above test result indicate that battery is used
The structure of embodiment 1,2 not only has good multiplying power discharging property, and with preferable security reliability.
From table two, the surface temperature of ND-4 batteries is than 13-21 DEG C of ND-1, ND-2 battery reduction.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, not
Constitute inappropriate limitation of the present invention.
The main structure diagram of the lug of the lithium ion battery that Fig. 1 is provided for prior art；
Fig. 2 is the side schematic view of Fig. 1；
Fig. 3 is a kind of main structure diagram of the lug of lithium ion battery that the present embodiment 1 is provided；
Fig. 4 is the side schematic view of Fig. 3；
Fig. 5 is a kind of main structure diagram of the lug of lithium ion battery that the present embodiment 2 is provided；
Fig. 6 is the side schematic view of Fig. 5；
Fig. 7 is lithium ion battery structure schematic diagram；
Fig. 8 is 20 rate discharge curves schematic diagrames of battery.
Specific embodiment
Describe the present invention in detail below in conjunction with accompanying drawing and specific embodiment, herein illustrative examples of the invention
It is and explanation is used for explaining the present invention but not as a limitation of the invention.
Embodiment 1：
A kind of lithium ion battery is present embodiments provided, including the battery core bodies being made up of positive plate, negative plate and barrier film,
Lug is welded with the electrode of battery core bodies, referring to shown in Fig. 3,4, lug includes a metal tape and the (macromolecule of tab 304
Composite film), the metal tape of the lug of the present embodiment include first paragraph 301 positioned at two ends, second segment 302 and
Interlude 303 between first paragraph 301 and second segment 302, tab 304 is pasted onto the two sides of interlude 303, lug
First paragraph 301 is located in the aluminum plastic film housing of battery core bodies, the electrode welding with battery core bodies, and interlude 303 runs through aluminum plastic film housing,
Tab 304 on interlude 303 is melting sealed with the aluminum plastic film on both sides to be combined together, so as to realize aluminum plastic film housing with gold
Category band be dielectrically separated from and aluminum plastic film housing sealing, the second segment 302 of metal tape stretched out outside aluminum plastic film housing, with it is outer
Portion's circuit is welded to connect.
In the present embodiment, the width of the interlude 303 of metal tape is set by the dimensions of battery core bodies, specifically basis
The width of the aluminum plastic film housing of lug external part is determined.In the present embodiment, the width of the interlude 303 of metal tape is set to
Maximum in the dimensions allowed band of current battery core bodies.
In the present embodiment the thickness of the first paragraph 301 of metal tape, second segment 302 is set identical with normal group, in
Between section 303 thickness it is thicker, experiment is proved, is further conducive to improving the current-carrying capacity of battery using the structure, reduces battery
Internal resistance.
Embodiment 2：
Referring to shown in Fig. 5,6, the present embodiment is with the difference of embodiment 1：
The width of the first paragraph 301 of the end of metal tape two, second segment 302 is also set greater than interlude by this implementation of class
303 width, equal to the width of tab 304, so as to further improve the current-carrying capacity of lug.
Above-described embodiment 1,2 technical schemes are particularly well-suited to laminated lithium ion battery, particularly thin lithium ion battery.
Below on the basis of existing high magnification system, the multiplying power of the size of lug, specification to lithium ion battery is have studied
The influence of discharge performance and circulation performance
1st, the preparation and design of battery
Positive active material LiCoO2, superconduction carbon black SP and electrically conductive graphite KS6 are mixed, using PVDF as binder making
Into anode sizing agent.Negative electrode active material MCMB and superconduction carbon black SP is mixed, using PVDF as binder making into cathode size,
By positive and negative electrode slurry is coated and roll-in after, be made ultra-thin, mushy positive plate and negative plate.
The routinely preparation method of lithium ion battery, by positive and negative plate use lamination be prepared into rated capacity for
The 7334106-S2A type lithium ion batteries of 2.6Ah, using aluminium pole ears (metal tape is as aluminium flake) as anode ear, copper nickel plating lug is (golden
Category band is the nickel strap of copper coating) used as negative electrode lug, the size of anode ear and negative electrode lug is as shown in Table 1.
According to above-mentioned lug size requirement, the present embodiment by taking the lithium ion battery that the homonymy shown in Fig. 7 goes out lug as an example,
The maximum discharge current of the battery according to the present embodiment and the model of battery, calculate the lug size requirement of lithium ion battery,
The factors such as combined process error consider that the lug width Breadth Maximum for determining the battery is that the width of 14 millimeters, i.e. tab is
The width requirement of the lug of the interlude where 14 millimeters, i.e. tab is less than 14 millimeters.
The lug design of experimental cell is as shown in Table 1：
Table one：The lug design parameter of experimental cell
2nd, main tester
Battery is melted into and partial volume using BS-9088K-3A lithium ion batteries automatic detection device (Guangzhou product)；
The inspection of multiplying power discharging property is carried out to battery using BK-7024L/60 rechargeable batteries testing equipment (Guangzhou product)
Survey；
Battery surface temperature during multiplying power discharging is detected using thermocouple, the data shown in table two are obtained.
3rd, influence of the lug size to battery multiplying power discharging property
Herein by the size for changing lug, research lug is to battery 20C multiplying power discharging properties and battery surface temperature
Influence.
By ND-1, ND-2, ND-3 and ND-4 battery with 20C multiplying powers constant-current discharge to 3.0V, battery rate discharge curves are shown in
The corresponding ND-1 batteries of 20C rate discharge curves shown in Fig. 8, wherein curve 101, the corresponding ND-2 batteries of curve 102, curve 103
Correspondence ND-3 batteries, the corresponding ND-4 batteries of curve 104.
As seen from Figure 8, battery discharge initial voltage is relatively：VND-1<VND-2<VND-3<VND-4, ND-3, ND-4 battery
Discharge voltage plateau is high, and discharge curve is smoothed, and discharge initiation voltage is higher.
It is visible by the comparing to battery ND-1 and ND-2 multiplying power discharging data, although the lug size of battery ND-1 is more
Greatly, but because it is thicker with the metal tape thickness of battery core bodies welding section, it is poor to instead result in welding quality, easily causes rosin joint
Or weldering is crossed, and cause not getting a promotion electrically for battery, it is deteriorated on the contrary.
Table two：20C multiplying power discharging data
| Battery is numbered | Internal resistance | Mean voltage | Discharging efficiency | Discharge temp |
| ND-1 | 4.92mΩ | 3.530V | 94.6% | 69℃ |
| ND-2 | 4.82mΩ | 3.546V | 95.4% | 65℃ |
| ND-3 | 4.61mΩ | 3.574V | 98.1% | 54℃ |
| ND-4 | 4.50mΩ | 3.585V | 98.5% | 48℃ |
By studying battery surface temperature with discharge capacity change curve, from table two, the electric discharge temperature at cell polar ear
It is ND-1 ＞ ND-2 ＞ ND-3 ＞ ND-4 to spend, because ND-3, ND-4, battery employ the thicker metal tape of interlude thickness
As lug.During big multiplying power discharging, near the temperature highest in lug region, therefore this subregion produces substantial amounts of Jiao
Have burning ears, cause temperature to rise too fast, and the current-carrying capacity of lug can be increased using the battery structure of ND-3, ND-4 battery, can
The activation polarization in lug region is effectively reduced, the rising of battery surface temperature is slow down, thus improves the security of battery
Energy.Above test result indicate that battery not only has good multiplying power discharging property using the structure of embodiment 1,2, and have
Preferable security reliability.
From table two, the surface temperature of ND-4 batteries is than 13-21 DEG C of ND-1, ND-2 battery reduction.
Embodiments described above, does not constitute the restriction to the technical scheme protection domain.It is any in above-mentioned implementation
Modification, equivalent and improvement made within the spirit and principle of mode etc., should be included in the protection model of the technical scheme
Within enclosing.
Claims (9)
1. a kind of lithium ion battery suitable for big multiplying power discharging, including battery core bodies, pole is welded with the battery core bodies electrode
Ear, the lug includes：One metal tape and tab, it is characterized in that,
The metal tape includes being located at the first paragraph of two ends, second segment and between the first paragraph and second segment
Interlude,
The tab is pasted onto the two sides of the interlude, and the width of the tab is wider than the width of the interlude, institute
State first paragraph, the thickness of second segment is thinner than the thickness of the interlude,
The first paragraph be located at the battery core bodies aluminum plastic film housing in, the electrode welding with the battery core bodies is connected, it is described in
Between section run through the aluminum plastic film housing, the tab is melting sealed with the aluminum plastic film on its both sides to be combined together, and makes the gold
Category band and the aluminum plastic film shell body phase insulation, the second segment are stretched out outside the aluminum plastic film housing.
2. lithium ion battery according to claim 1, it is characterized in that,
The width of the width more than the interlude of the first paragraph, second segment.
3. lithium ion battery according to claim 1, it is characterized in that,
The first paragraph, the thickness of second segment are 2 millimeters, and the thickness of the interlude is 3 millimeters, and the error of the thickness is
Positive and negative 0.02 millimeter.
4. lithium ion battery according to claim 2, it is characterized in that,
The width of the width more than or equal to the tab of the first paragraph, second segment.
5. according to any described lithium ion battery of claim 1-4, it is characterized in that,
The lithium ion battery is laminated batteries.
6. a kind of pole piece suitable for laminated lithium ion battery, the lug includes：One metal tape and tab, its feature
It is,
The metal tape includes being located at the first paragraph of two ends, second segment and between the first paragraph and second segment
Interlude,
The tab is pasted onto the two sides of the interlude, and the width of the tab is wider than the width of the interlude, institute
State first paragraph, the thickness of second segment is thinner than the thickness of the interlude.
7. the pole piece suitable for laminated lithium ion battery according to claim 1, it is characterized in that,
The width of the width more than the interlude of the first paragraph, second segment.
8. the pole piece suitable for laminated lithium ion battery according to claim 1, it is characterized in that,
The first paragraph, the thickness of second segment are 2 millimeters, and the thickness of the interlude is 3 millimeters, and the error of the thickness is
Positive and negative 0.02 millimeter.
9. the pole piece suitable for laminated lithium ion battery according to claim 2, it is characterized in that,
The width of the width more than or equal to the tab of the first paragraph, second segment.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017100854373 | 2017-02-17 | ||
| CN201710085437 | 2017-02-17 |
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| CN106784582A true CN106784582A (en) | 2017-05-31 |
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| CN201710136024.3A Pending CN106784582A (en) | 2017-02-17 | 2017-03-08 | Suitable for the lithium ion battery and pole piece of big multiplying power discharging |
| CN201720224362.8U Active CN206673016U (en) | 2017-02-17 | 2017-03-08 | Suitable for the lithium ion battery and pole piece of big multiplying power discharging |
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| CN201720224362.8U Active CN206673016U (en) | 2017-02-17 | 2017-03-08 | Suitable for the lithium ion battery and pole piece of big multiplying power discharging |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611330A (en) * | 2017-09-22 | 2018-01-19 | 东莞市科睿思美新能源科技有限公司 | A kind of lug and battery with insulation effect |
| CN108963176A (en) * | 2018-08-01 | 2018-12-07 | 广州鹏辉能源科技股份有限公司 | Lithium Fe battery positive pole ear and lithium Fe battery |
| WO2023088434A1 (en) * | 2021-11-18 | 2023-05-25 | 珠海冠宇电池股份有限公司 | Plate and battery |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784582A (en) * | 2017-02-17 | 2017-05-31 | 湖南格瑞普新能源有限公司 | Suitable for the lithium ion battery and pole piece of big multiplying power discharging |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102306735A (en) * | 2011-09-06 | 2012-01-04 | 深圳市格瑞普电池有限公司 | Lithium ion electrical core and lug |
| JP2012048852A (en) * | 2010-08-24 | 2012-03-08 | Fujimori Kogyo Co Ltd | Electrode lead wire member for nonaqueous battery |
| KR20140019753A (en) * | 2012-08-07 | 2014-02-17 | 쇼와 덴코 패키징 가부시키가이샤 | Terminal lead |
| CN205231157U (en) * | 2015-11-30 | 2016-05-11 | 山东精工电子科技有限公司 | Cylindrical lithium -ion battery utmost point ear |
| CN206673016U (en) * | 2017-02-17 | 2017-11-24 | 湖南格瑞普新能源有限公司 | Suitable for the lithium ion battery and pole piece of big multiplying power discharging |
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2017
- 2017-03-08 CN CN201710136024.3A patent/CN106784582A/en active Pending
- 2017-03-08 CN CN201720224362.8U patent/CN206673016U/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012048852A (en) * | 2010-08-24 | 2012-03-08 | Fujimori Kogyo Co Ltd | Electrode lead wire member for nonaqueous battery |
| CN102306735A (en) * | 2011-09-06 | 2012-01-04 | 深圳市格瑞普电池有限公司 | Lithium ion electrical core and lug |
| KR20140019753A (en) * | 2012-08-07 | 2014-02-17 | 쇼와 덴코 패키징 가부시키가이샤 | Terminal lead |
| CN205231157U (en) * | 2015-11-30 | 2016-05-11 | 山东精工电子科技有限公司 | Cylindrical lithium -ion battery utmost point ear |
| CN206673016U (en) * | 2017-02-17 | 2017-11-24 | 湖南格瑞普新能源有限公司 | Suitable for the lithium ion battery and pole piece of big multiplying power discharging |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611330A (en) * | 2017-09-22 | 2018-01-19 | 东莞市科睿思美新能源科技有限公司 | A kind of lug and battery with insulation effect |
| CN108963176A (en) * | 2018-08-01 | 2018-12-07 | 广州鹏辉能源科技股份有限公司 | Lithium Fe battery positive pole ear and lithium Fe battery |
| WO2023088434A1 (en) * | 2021-11-18 | 2023-05-25 | 珠海冠宇电池股份有限公司 | Plate and battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN206673016U (en) | 2017-11-24 |
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