CN206673016U - 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
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- CN206673016U CN206673016U CN201720224362.8U CN201720224362U CN206673016U CN 206673016 U CN206673016 U CN 206673016U CN 201720224362 U CN201720224362 U CN 201720224362U CN 206673016 U CN206673016 U CN 206673016U
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- interlude
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- lithium ion
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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
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Lithium ion battery is the utility model is related to, discloses a kind of lithium ion battery and pole piece suitable for big multiplying power discharging.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, the aluminum plastic film on tab and its both sides is melting sealed 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, improves its discharge performance.
Description
Technical field
It the utility model is related to lithium ion battery manufacturing field, more particularly to a kind of lithium ion suitable for big multiplying power discharging
Battery 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
Also more and more higher can be required, but the lithium ion battery of commercialization at present is difficult to realize continuous discharge more than 20C multiplying powers, and 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 battery multiplying power discharging property and cycle performance is caused to be deteriorated.
The utility model is that the energy that battery is exported to outside passes carrying out the utility model research process discovery, lug
The carrier passed, so during the big multiplying power discharging of battery, times of battery can be effectively improved initial stage in electric discharge by improving the current-carrying capacity of lug
Rate discharge performance.
Fig. 1,2 for the lithium ion battery of prior art extreme ear structure, referring to shown in Fig. 1,2, the width of lug by lithium from
The width limitation of lug external part on sub- battery, lug include metal tape 101 and are pasted onto the middle part two sides of metal tape 101
Tab 102, the width of tab 102 are 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 stretch out out of 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 utility model embodiment be to provide a kind of lithium ion battery suitable for big multiplying power discharging with
And pole piece, the temperature of battery is advantageously reduced using the technical scheme, improves its discharge performance.
The utility model embodiment provides a kind of lithium ion battery, including battery core bodies, is welded on the battery core bodies electrode
There is lug, the lug includes：One metal tape and tab, it is characterized in that,
The metal tape include positioned at the first paragraphs 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, is connected with the electrode welding of the battery core bodies, institute
State interlude and run through the aluminum plastic film housing, the aluminum plastic film on the tab and its both sides is melting sealed 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 first paragraph, the width of second segment are more than the width of the interlude.
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 first paragraph, the width of second segment are more than or equal to the width of the tab.
Alternatively, the lithium ion battery is laminated batteries.
A kind of pole piece suitable for laminated lithium ion battery that the utility model embodiment provides, lug include：One gold medal
Category band and tab,
The metal tape include positioned at the first paragraphs 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 first paragraph, the width of second segment are more than the width of the interlude.
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 first paragraph, the width of second segment are more than or equal to the width of the tab.
Therefore battery employs the thicker metal tape of interlude thickness as lug, during big multiplying power discharging,
Temperature highest close to lug region, therefore this subregion produces substantial amounts of Joule heat, causes temperature to rise too fast, and use
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 indicates that battery uses
The structure of embodiment 1,2 not only has good multiplying power discharging property, and has preferable security reliability.
From table two, the surface temperature of ND-4 batteries reduces 13-21 DEG C than ND-1, ND-2 battery.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding to of the present utility model, forms the part of the application,
Do not form to improper restriction of the present utility model.
Fig. 1 is the main structure diagram of the lug for the lithium ion battery that prior art provides；
Fig. 2 is Fig. 1 side schematic view；
Fig. 3 is a kind of main structure diagram of the lug for lithium ion battery that the present embodiment 1 provides；
Fig. 4 is Fig. 3 side schematic view；
Fig. 5 is a kind of main structure diagram of the lug for lithium ion battery that the present embodiment 2 provides；
Fig. 6 is Fig. 5 side schematic view；
Fig. 7 is lithium ion battery structure schematic diagram；
Fig. 8 is 20 rate discharge curves schematic diagrames of battery.
Embodiment
The utility model is described in detail below in conjunction with accompanying drawing and specific embodiment, herein signal of the present utility model
Property embodiment and explanation be used for explaining the utility model, but be not intended as to restriction of the present utility model.
Embodiment 1：
A kind of lithium ion battery, including the battery core bodies made of positive plate, negative plate and barrier film are present embodiments provided,
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 the 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,
The aluminum plastic film on tab 304 on interlude 303 and both sides is melting sealed to be combined together, so as to realize aluminum plastic film housing and gold
Category band be dielectrically separated from and the sealing of aluminum plastic film housing, the second segment 302 of metal tape are 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 determines.In the present embodiment, the width of the interlude 303 of metal tape is set
For the 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 prove, using the structure further be advantageous to improve battery current-carrying capacity, reduce battery
Internal resistance.
Embodiment 2：
Referring to shown in Fig. 5,6, the present embodiment and the difference of embodiment 1 are：
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 especially suitable for laminated lithium ion battery, particularly thin lithium ion battery.
Below on the basis of existing high magnification system, the size of lug, specification are have studied to the multiplying power of lithium ion battery
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, binder making is used as using PVDF
Into anode sizing agent.Negative electrode active material MCMB and superconduction carbon black SP are mixed, using PVDF as binder making into cathode size,
Positive and negative electrode slurry is coated with after roll-in, ultra-thin, mushy positive plate and negative plate is made.
The routinely preparation method of lithium ion battery, by positive and negative plate use lamination be prepared into rated capacity for
2.6Ah 7334106-S2A type lithium ion batteries, using aluminium pole ears (metal tape is aluminium flake) as anode ear, copper nickel plating lug (gold
Category band is the nickel strap of copper coating) it is 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 so that the homonymy shown in Fig. 7 goes out the lithium ion battery of lug as an example,
According to the model of the maximum discharge current of the battery of the present embodiment and battery, the lug size requirement of lithium ion battery is calculated,
The factors such as combined process error consider that the lug width Breadth Maximum for determining the battery is 14 millimeters, i.e. the width of tab is
14 millimeters, i.e. the width requirement of the lug of interlude where 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 using BS-9088K-3A lithium ion batteries automatic detection device (Guangzhou production) and partial volume；
The inspection of multiplying power discharging property is carried out to battery using BK-7024L/60 rechargeable batteries detection device (Guangzhou production)
Survey；
Battery surface temperature during multiplying power discharging is detected using thermocouple, obtains the data shown in table two.
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.
ND-1, ND-2, ND-3 and ND-4 battery are shown in 20C multiplying powers constant-current discharge to 3.0V, battery rate discharge curves
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
Corresponding ND-3 batteries, the corresponding ND-4 batteries of curve 104.
As seen from Figure 8, the comparison of battery discharge initial voltage is：VND-1<VND-2<VND-3<VND-4, ND-3, ND-4 battery
Discharge voltage plateau is high, and discharge curve is smooth, and discharge initiation voltage is higher.
By to the more visible of battery ND-1 and ND-2 multiplying power discharging data, although battery ND-1 lug size 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 void
Weldering is crossed in weldering, is caused not getting a promotion electrically for battery, 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
Spend for ND-1 ＞ ND-2 ＞ ND-3 ＞ ND-4, because ND-3, ND-4, battery employ the thicker metal tape of interlude thickness
As lug.During big multiplying power discharging, the temperature highest close to lug region, therefore this subregion produces substantial amounts of Jiao
Have burning ears, cause temperature to rise too fast, and use the battery structure of ND-3, ND-4 battery to increase the current-carrying capacity of lug, can
The activation polarization in lug region is effectively reduced, slow down the rising of battery surface temperature, thus improves the security of battery
Energy.Above test result indicates 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 reduces 13-21 DEG C than ND-1, ND-2 battery.
Embodiments described above, the restriction to the technical scheme protection domain is not formed.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements 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 include：One metal tape and tab, it is characterized in that,
The metal tape includes the first paragraph positioned at 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 is located in the aluminum plastic film housing of the battery core bodies, is connected with the electrode welding of the battery core bodies, in described
Between section run through the aluminum plastic film housing, the aluminum plastic film on the tab and its both sides is melting sealed to be combined together, and makes the gold
Belong to band and the aluminum plastic film shell body phase insulation, the second segment is stretched out outside the aluminum plastic film housing.
2. lithium ion battery according to claim 1, it is characterized in that,
The first paragraph, the width of second segment are more than the width of the interlude.
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 first paragraph, the width of second segment are more than or equal to the width of the tab.
5. according to claim 1-4 any described lithium ion battery, it is characterized in that,
The lithium ion battery is laminated batteries.
6. a kind of pole piece suitable for laminated lithium ion battery, lug includes：One metal tape and tab, it is characterized in that,
The metal tape includes the first paragraph positioned at 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 according to claim 1 suitable for laminated lithium ion battery, it is characterized in that,
The first paragraph, the width of second segment are more than the width of the interlude.
8. the pole piece according to claim 1 suitable for laminated lithium ion battery, 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 according to claim 2 suitable for laminated lithium ion battery, it is characterized in that,
The first paragraph, the width of second segment are more than or equal to the width of the tab.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2017100854373 | 2017-02-17 | ||
| CN201710085437 | 2017-02-17 |
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| CN206673016U true CN206673016U (en) | 2017-11-24 |
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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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Cited By (2)
| 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 |
| 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 |
Families Citing this family (2)
| 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 |
| CN114094045A (en) * | 2021-11-18 | 2022-02-25 | 珠海冠宇电池股份有限公司 | Pole piece and battery |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5562176B2 (en) * | 2010-08-24 | 2014-07-30 | 藤森工業株式会社 | Electrode lead wire member for non-aqueous 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 |
| JP2014035811A (en) * | 2012-08-07 | 2014-02-24 | Showa Denko Packaging Co Ltd | 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 |
| 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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2017
- 2017-03-08 CN CN201710136024.3A patent/CN106784582A/en active Pending
- 2017-03-08 CN CN201720224362.8U patent/CN206673016U/en active Active
Cited By (2)
| 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 |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN106784582A (en) | 2017-05-31 |
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