CN108963176A - Lithium Fe battery positive pole ear and lithium Fe battery - Google Patents
Lithium Fe battery positive pole ear and lithium Fe battery Download PDFInfo
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- CN108963176A CN108963176A CN201810861507.4A CN201810861507A CN108963176A CN 108963176 A CN108963176 A CN 108963176A CN 201810861507 A CN201810861507 A CN 201810861507A CN 108963176 A CN108963176 A CN 108963176A
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- lithium
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- pole ear
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
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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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
- H01M6/16—Cells with non-aqueous electrolyte with organic electrolyte
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of lithium Fe battery positive pole ear and lithium Fe batteries, it is related to battery technology field, the positive pole ear is in long sheet, including the first tab set gradually along its length, second tab and third tab, the first tab material is aluminium, the second tab material is aluminium nickel composite material, the third tab material is nickel or cupro-nickel composite material, it is harder to alleviate existing nickel plated steel strip positive pole ear material, internal resistance is big, calorific value is high, it is squeezing, under the action of the external force such as needle thorn and impact, easily cause cells burst or explosion, the technical issues of leading to safety accident.Lithium Fe battery positive pole ear material provided by the invention is more soft, and internal resistance is smaller, not only increases the discharge performance of lithium Fe battery, and under the external forces such as extruding, impact and needle thorn, will not pierce through diaphragm, be improved the security performance of lithium Fe battery.
Description
Technical field
The present invention relates to battery technology fields, more particularly, to a kind of lithium Fe battery positive pole ear and lithium Fe battery.
Background technique
With being constantly progressive for electronic information technology, consumption electronic product is constantly to diversification, miniaturization, high power
Trend development, to the performance requirements of battery various aspects also in fast lifting, it is desirable that battery energy density is big, power density is high, valence
Lattice are suitable, easy to use, self-discharge rate is low, storage life is long, especially propose to the energy density of battery and power density
Increasingly higher demands.
Secondary cell is developed rapidly because that can charge with recycling, but because capacity is low, self-discharge rate is high, deposits for it
It puts that the time is short, poor safety performance, needs to charge after use, the reasons such as non-standardised generic difference of model can not substitute one-shot battery,
And one-shot battery was obtaining fastly in recent years because of its capacity height, the advantages that gentle, model standardization and versatility is good of discharging
Speed development.
Positive pole ear in existing lithium Fe battery is generally nickel plated steel strip, for positive plate to be fixedly connected with nut cap,
But since nickel plated steel strip material is harder, internal resistance is big, calorific value is high, in the case where squeezing, needle piercing and the external forces such as impact, easily pierces
Diaphragm is worn, causes short circuit, causes cells burst or explosion, lead to safety accident.
In view of this, the present invention is specifically proposed.
Summary of the invention
One of the objects of the present invention is to provide a kind of lithium Fe battery positive pole ear, using alleviate existing nickel plated steel strip as
When positive pole ear, since nickel plating steel band material is harder, internal resistance is big, and calorific value is high, in the effect of the external force such as extruding, needle thorn and impact
Under, the technical issues of easily causing cells burst or explosion, lead to safety accident.
Lithium Fe battery positive pole ear provided by the invention is in long sheet, including the first pole set gradually along its length
Ear, the second tab and third tab, the first tab material are aluminium, and the second tab material is aluminium nickel composite material, institute
Stating third tab material is nickel or cupro-nickel composite material.
Further, the width of the lithium Fe battery positive pole ear is 2-4mm, the thickness of the lithium Fe battery positive pole ear
For 0.08-0.2mm；
Further, the length of first tab is 15-40mm, and the length of second tab is 2-3mm, described the
The length of three tabs is 2-10mm.
Further, the aluminium nickel composite material is selected from alumel, aluminium-to-nickel or nickel and one of aluminizes, preferably aluminium
Turn nickel；
Preferably, the copper-nickel composite material turns one of copper selected from corronil, copper nickel plating or nickel, and preferably copper plates
Nickel.
Further, gel is coated on first tab, it is close that the gel is coated on first tab
One end of second tab.
Further, tab gummed paper is provided on the lithium Fe battery positive pole ear.
The second object of the present invention is to provide a kind of lithium Fe battery, including lithium Fe battery anode provided by the invention pole
Ear.
Further, the lithium Fe battery further includes positive plate and nut cap, further includes positive plate and nut cap, and positive plate includes just
One end of pole collector, the lithium Fe battery positive pole ear is fixedly connected with the plus plate current-collecting body, the lithium Fe battery anode
The other end of tab is fixedly connected with nut cap.
Further, the lithium Fe battery further includes negative electrode tab and diaphragm, and the negative electrode tab is opposite with the positive plate to be set
It sets, the diaphragm is set between the positive plate and the negative electrode tab.
Further, the positive plate is coated on plus plate current-collecting body by ferrous disulfide, conductive agent, bonding agent and imbibition agent
On be compacted；
Preferably, the negative electrode tab is lithium band or lithium-aluminium alloy band；
Preferably, the diaphragm is polypropylene porous film, polyethylene porous membrane or polyethylene and polypropylene composite materials perforated membrane.
Lithium Fe battery positive pole ear provided by the invention include the aluminium material set gradually along its length the first tab,
The second tab and nickel of aluminium nickel composite material material or the third tab of cupro-nickel composite material quality, so that the first pole of aluminium material
Ear can be welded with positive plate, and the third tab of nickel or cupro-nickel composite material quality can be welded with nut cap, while the anode pole
Ear internal resistance is substantially less than nickel plated steel strip, and calorific value is low, significantly improves the discharge performance of lithium Fe battery.In addition, aluminium material first
Tab is more soft, even if diaphragm will not be pierced through, to effectively avoid sending out under the external forces such as extruding, impact and needle thorn
Raw short circuit, ensure that lithium Fe battery using safe.
Lithium Fe battery provided by the invention not only increases lithium by using lithium Fe battery positive pole ear provided by the invention
The discharge performance of iron cell, and the security performance of lithium Fe battery is improved, make it in time in external force such as extruding, impact and needle thorns
Under effect, it also can effectively avoid that short circuit occurs, guarantee the person and property safety of people.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram for the lithium Fe battery positive pole ear that the embodiment of the present invention 1 provides；
Fig. 2 is the average internal resistance histogram for the positive pole ear that embodiment 2 and comparative example 4 provide；
Fig. 3 is the discharge performance curve graph for the lithium Fe battery that embodiment 11 and comparative example 8 provide.
Icon: the first tab of 101-；The second tab of 102-；103- third tab；104- gel.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.Reagents or instruments used without specified manufacturer is
The conventional products that can be obtained by commercially available purchase.
According to an aspect of the present invention, the present invention provides a kind of lithium Fe battery positive pole ear, the positive pole ear is in
Long sheet, including the first tab, the second tab and third tab set gradually along its length, the first tab material is
Aluminium, the second tab material are aluminium nickel composite material, and the third tab material is nickel or cupro-nickel composite material.
In the present invention, one end of lithium Fe battery positive pole ear is used to weld with plus plate current-collecting body, due to plus plate current-collecting body
Generally aluminium foil is welded and fixed using it is conducive to the first tab of aluminium material with positive plate；Lithium Fe battery positive pole ear
The other end is used to weld with nut cap, and the material of nut cap is nickel, and the present invention is using nickel or the third tab of cupro-nickel composite material quality
Be conducive to be welded and fixed with nut cap.Simultaneously as the first tab of aluminium material than nickel plated steel strip softness, even if make its impact,
Diaphragm will not be pierced through under the external forces such as needle thorn by squeezing, to effectively improve the security performance of lithium Fe battery.
Lithium Fe battery positive pole ear provided by the invention include the aluminium material set gradually along its length the first tab,
The second tab and nickel of aluminium nickel composite material or the third tab of cupro-nickel composite material, enable the first tab of aluminium material with
The third tab of positive plate welding, nickel or cupro-nickel composite material can be welded with nut cap, while the positive pole ear internal resistance is significantly low
In nickel plated steel strip, calorific value is low, significantly improves the discharge performance of lithium Fe battery.In addition, the first tab of aluminium material is more soft,
Even if diaphragm will not be pierced through under the external forces such as extruding, impact and needle thorn, to effectively avoid that short circuit occurs, ensure that
Lithium Fe battery using safe.
In the preferred embodiment of the present invention, during aluminium nickel composite material is aluminized from alumel, aluminium-to-nickel or nickel
One kind, preferably aluminium-to-nickel.
In the preferred embodiment of the present invention, cupro-nickel composite material turns copper selected from corronil, copper nickel plating or nickel
One of, preferably copper nickel plating.
In the preferred embodiment of the present invention, the width of lithium Fe battery positive pole ear is 2-4mm, and lithium Fe battery is just
Pole tab with a thickness of 0.08-0.2mm.
In the preferred embodiment of the invention, the typical but non-limiting width of the lithium Fe battery positive pole ear is such as
For 2,2.5,3,3.5 or 4mm；The typical but non-limiting thickness for example 0.08 of the lithium Fe battery positive pole ear, 0.1,0.15
Or 0.2mm.
In the preferred embodiment of the present invention, the length of the first tab is 15-40mm, the length of second tab
Degree is 2-3mm, and the length of the third tab is 2-10mm.
In the preferred embodiment of the invention, the length and the length phase of lithium Fe battery of lithium Fe battery positive pole ear
To match, the length of the lithium Fe battery of different model is different, and therefore, the length of lithium Fe battery provided by the invention is not also identical, and first
The length of tab and third tab is not also identical.
In the preferred embodiment of the invention, the typical but non-limiting length of the first tab for example 15,18,
20,22,25,28,30,32,35,38 or 40mm；For example 2, the 2.5 or 3mm of typical but non-limiting length of second tab；The
The typical but non-limiting length for example 2 of three tabs, 2.5,3,3.5,4,4.5,5,5.5,6,6.5,7,7.5,8,8.5,9,
9.5 or 10mm.
In the preferred embodiment of the present invention, gel is coated on the first tab, gel is coated on first
Tab is close to one end of the second tab.
By coating gel on the first tab, so that gel as insulating materials, prevents the lithium Fe battery from sending out
Raw short circuit.
In present invention further optimization embodiment, the coated length of gel is 6.5-7.5mm.
In still more preferably embodiment of the invention, gel is from the first tab close to one end of the second tab
End starts to coat, and may extend to the second tab.
In the preferred embodiment of the present invention, tab gummed paper is provided on lithium Fe battery positive pole ear.
In present invention further optimization embodiment, tab gummed paper is set to whole and the third pole of the second tab
Ear is close to one end of second tab.In the preferred embodiment of the invention, gel or tab gummed paper are as insulation
Material, the sealing function for preventing battery short circuit, rather than in conventional batteries.
According to the second aspect of the invention, the present invention provides a kind of lithium Fe batteries, including lithium iron provided by the invention
Cell positive pole ear.
Lithium Fe battery provided by the invention not only increases lithium by using lithium Fe battery positive pole ear provided by the invention
The discharge performance of iron cell, and the security performance of lithium Fe battery is improved, make it in time in external force such as extruding, impact and needle thorns
Under effect, it also can effectively avoid that short circuit occurs, guarantee the person and property safety of people.
In the preferred embodiment of the present invention, lithium Fe battery provided by the invention further includes positive plate and nut cap,
Positive plate includes plus plate current-collecting body, and one end of the lithium Fe battery positive pole ear is fixedly connected with plus plate current-collecting body, and lithium Fe battery is just
The other end of pole tab is fixedly connected with nut cap.
In the preferred embodiment of the present invention, one end of the first tab and anode collect in lithium Fe battery positive pole ear
Flow soldering, one end of third tab and nut cap are welded in lithium Fe battery positive pole ear.
In the preferred embodiment of the present invention, lithium Fe battery provided by the invention further includes negative electrode tab and diaphragm,
Negative electrode tab is oppositely arranged with positive plate, and diaphragm is set between positive plate and negative electrode tab.
Battery core is formed by adhesive tape fixation after positive plate, diaphragm and negative electrode tab winding.
In the preferred embodiment of the present invention, positive plate is by ferrous disulfide, conductive agent, bonding agent and imbibition agent
Coated on being compacted on plus plate current-collecting body.
In present invention further optimization embodiment, plus plate current-collecting body is aluminium foil.
In present invention further optimization embodiment, bonding agent is selected from from polyacrylic acid, polytetrafluoroethylene (PTFE), gathers inclined chlorine
Ethylene, soluble poly tetrafluoroethene, butadiene-styrene rubber, hydroxypropyl methyl cellulose, methylcellulose, carboxymethyl cellulose, poly- second
One or more of enol, acrylonitrile copolymer, sodium alginate, chitosan and chitosan derivatives.
In present invention further optimization embodiment, lotion is silica.
In the preferred embodiment of the present invention, negative electrode tab is lithium band or lithium-aluminium alloy band.
In the preferred embodiment of the present invention, diaphragm is polypropylene porous film, polyethylene porous membrane or polyethylene
With polypropylene composite materials perforated membrane.
Technical solution provided by the invention is further described below with reference to embodiment and comparative example.
Embodiment 1
Fig. 1 is the structural schematic diagram for the lithium Fe battery positive pole ear that the embodiment of the present invention 1 provides；As shown in Figure 1, this implementation
Example provides a kind of lithium Fe battery positive pole ear, which is in long sheet, including set gradually along its length first
Tab 101, the second tab 102 and third tab 103,101 material of the first tab are aluminium, and 102 material of the second tab is aluminium-to-nickel,
103 material of third tab is nickel.
In the present embodiment, the length of the positive pole ear is 47.5mm, width 2mm, with a thickness of 0.1mm, wherein first
The length of tab 101 is 40mm, and the length of the second tab 102 is 2.5mm, and the length of third tab 103 is 5mm.
Wherein, the first tab 101 has gel 104 close to the end coated of the second tab 102, the painting of the gel 104
Covering length is 7mm.
Embodiment 2
Present embodiments provide a kind of lithium Fe battery positive pole ear, the positive pole ear difference from example 1 is that,
The material of third tab is copper nickel plating.
Embodiment 3
Present embodiments provide a kind of lithium Fe battery positive pole ear, the positive pole ear difference from example 1 is that,
The width of the positive pole ear is 1mm.
Embodiment 4
Present embodiments provide a kind of lithium Fe battery positive pole ear, the positive pole ear difference from example 1 is that,
The width of the positive pole ear is 1.5mm.
Embodiment 5
Present embodiments provide a kind of lithium Fe battery positive pole ear, the positive pole ear difference from example 1 is that,
The width of the positive pole ear is 3mm.
Embodiment 6
Present embodiments provide a kind of lithium Fe battery positive pole ear, the positive pole ear difference from example 1 is that,
The width of the positive pole ear is 2.5mm.
Embodiment 7
Present embodiments provide a kind of lithium Fe battery positive pole ear, the positive pole ear difference from example 1 is that,
The width of the positive pole ear is 4mm.
Embodiment 8
Present embodiments provide a kind of lithium Fe battery positive pole ear, the positive pole ear difference from example 1 is that,
The width of the positive pole ear is 5mm.
Embodiment 9
Present embodiments provide a kind of lithium Fe battery positive pole ear, the positive pole ear difference from example 1 is that,
The width of the positive pole ear is 0.5mm.
Comparative example 1
This comparative example provides a kind of positive pole ear, the positive pole ear difference from example 1 is that, the anode pole
The all aluminium of the material of ear.
Comparative example 2
This comparative example provides a kind of positive pole ear, the positive pole ear difference from example 1 is that, the anode pole
The all nickel of the material of ear.
Comparative example 3
This comparative example provides a kind of positive pole ear, the positive pole ear difference from example 1 is that, the anode pole
The all copper of the material of ear.
Comparative example 4
This comparative example provides a kind of positive pole ear, the positive pole ear difference from example 1 is that, the anode pole
Ear is nickel plated steel strip.
Embodiment 10-18
Embodiment 10-18 each provides a kind of lithium Fe battery, including cathode lithium band, and anode is coated in current collector aluminum foil
Ferrous disulfide, steel shell nut cap and organic electrolyte containing lithium salt, embodiment 1-9 offer is respectively adopted in positive pole ear
Positive pole ear.
Comparative example 5-8
Comparative example 5-8 each provides a kind of lithium Fe battery, and the anode of comparative example 1-4 offer is respectively adopted in positive pole ear
Tab.
Test example 1
The lithium Fe battery positive pole ear 1000 that embodiment 1-9 is provided respectively only carries out extension test under 10Kg gravity,
According to number statistical tab fracture percentage is broken, the results are shown in Table 1.
1 lithium Fe battery positive pole ear tension failure tables of data of table
| It is broken percentage | |
| Embodiment 1 (width 2mm) | 0% |
| Embodiment 2 (width 2mm) | 0% |
| Embodiment 3 (width 1mm) | 25% |
| Embodiment 4 (width 1.5mm) | 12% |
| Embodiment 5 (width 3mm) | 0% |
| Embodiment 6 (width 2.5mm) | 0% |
| Embodiment 7 (width 4mm) | 0% |
| Embodiment 8 (width 5mm) | 0% |
| Embodiment 9 (width 0.5mm) | 88% |
As it can be seen from table 1 tensile property is more excellent, works as pole when the width of lithium Fe battery positive pole ear is 1-5mm
When ear width is less than 1mm, tensile property is poor, is unable to satisfy the use demand of lithium Fe battery.
Test example 2
In order to measure influence of the unlike material positive pole ear to guide performance, the anode that comparative example 1-4 is provided is measured respectively
The maximum temperature of tab, the results are shown in Table 2.
The heating property tables of data for the positive pole ear that 2 comparative example 1-4 of table is provided
| Electric current (A) | Voltage (V) | Length (cm) | Time (s) | Maximum temperature (DEG C) | |
| Comparative example 1 (aluminium) | 5.0 | 0.2 | 5.5 | 120 | 29.8 |
| Comparative example 2 (nickel) | 5.0 | 0.2 | 5.5 | 120 | 76.9 |
| Comparative example 3 (copper) | 5.0 | 0.2 | 5.5 | 120 | 37.0 |
| Comparative example 4 (nickel plated steel strip) | 5.0 | 0.2 | 5.5 | 120 | 88.7 |
From table 2 it can be seen that under identical testing conditions, the highest for the positive pole ear that comparative example 1 and comparative example 3 provide
Temperature is substantially less than comparative example 2 and comparative example 4, this illustrates that the calorific value of aluminium material tab and copper material tab is lower, is used for
When lithium Fe battery, it is easier to eliminate safe hidden trouble.
Test example 3
By the lithium Fe battery that embodiment 11 and comparative example 8 provide carry out respectively it is pre- it is anti-electric after, every kind of battery testing 50PCS,
The average internal resistance for the positive pole ear that testing example 2 and comparative example 4 provide respectively, as a result as shown in Figure 1, it will be seen from figure 1 that
The average internal resistance for the aluminium-to-nickel positive pole ear that embodiment 2 provides is 109m Ω, and the nickel plated steel strip that comparative example 4 provides is average interior
Resistance is 120m Ω, this illustrates that the internal resistance for the positive pole ear that embodiment 2 provides is substantially less than the interior of the positive pole ear of the offer of comparative example 4
Resistance.
Test example 4
The discharge property for the lithium Fe battery that testing example 11 and comparative example 8 provide is distinguished at 200mA constant-current discharge, 25 DEG C
Can, test results are shown in figure 2.
From table 2 it can be seen that there is no obvious for the capacity of the lithium Fe battery of two kinds of different tabs in constant current electric discharge
Difference, but the voltage curve of aluminium-to-nickel tab battery is more smooth.Test example 5
Embodiment 2-3 and comparative example 2 and comparative example 4 positive pole ear provided are subjected to hardness test respectively, as a result as follows:
Material hardness: nickel plated steel strip > pure nickel > aluminium-to-nickel=aluminium turns copper nickel plating
This illustrate it is provided by the invention turn nickel or aluminium turn copper nickel plating material positive pole ear hardness it is low, rushed in time in external force
Hit, squeeze or needle thorn in the case of, be also not susceptible to pierce through diaphragm and pole piece, lead to short circuit, to effectively increase lithium Fe battery
Security performance.
In addition, aluminium-to-nickel positive pole ear provided by the invention or aluminium turn copper nickel plating positive pole ear, the first tab is all set in
Inside battery core, for connecting with plus plate current-collecting body, third tab is used to weld with nut cap.
Test example 6
By embodiment 11-12 and comparative example 8 are provided, lithium Fe battery each 3000 are squeezed respectively, are impacted and needle thorn is surveyed
Examination, every kind of test use 1000, battery, and test result is as shown in table 3.
Wherein, the test condition for squeezing test is as follows:
Test equipment: tester, AC power source, voltage internal resistance test device are squeezed
Test environment: (20 ± 5) DEG C, humidity 60 ± 15%, normal atmosphere pressure ring (86~106Kpa)
Testing procedure: battery is placed in two planes, is squeezed perpendicular to pole plate direction, is applied between two plates
The extruding force of 13.0kN ± 0.2kN.Once pressure, which reaches maximum value, can stop squeeze test, battery cannot be sent out during test
Raw external short circuit.
The test condition of shock-testing are as follows:
Test equipment: AC power source, heavy impact device, shield that can be extremely nonflammable with flame proof
Test environment: (20 ± 5) DEG C, humidity 60 ± 15%, normal atmosphere (An) environment (86~106Kpa)
Testing procedure: being placed in platform surface for battery, and diameter is horizontal several in battery for the metal bar of 15.8mm ± 0.2mm
What center upper surface uses weight to hit for the weight of 9.1kg ± 0.1kg from the eminence free falling body state of 610mm ± 25mm
It is placed with the battery surface of metal bar, when cylindrical battery impact test keeps its vertical axis parallel with weight surface, metal bar and electricity
Pond vertical axis is vertical.
The test condition of lancing test are as follows:
Test equipment: AC power source, test equipment, needling device, shield that can be extremely nonflammable with flame proof
Test environment: (20 ± 5) DEG C, humidity 60 ± 15%, normal atmosphere (An) environment (86~106Kpa)
Testing procedure: being placed in platform surface for battery, places it in baltimore groove or on porose plate, allows the diameter to be
The steel needle of 5mm-8mm passes through the center of battery with the speed of 25mm ± 5mm/S, and keeps 1min.
Security performance tables of data under 3 lithium Fe battery external impacts of table
From table 3 it can be seen that security performance of the lithium Fe battery of embodiment 11-12 offer under external impacts is significantly higher than
Comparative example 8, this illustrates lithium Fe battery positive pole ear provided by the invention using the of the aluminium material set gradually along its length
When positive pole ear made of one tab, the second tab of alumel material and nickel or the third tab of copper nickel plating material,
Under the external forces such as extruding, impact and needle thorn, security performance is significantly improved.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of lithium Fe battery positive pole ear, which is characterized in that the positive pole ear is in long sheet, including along its length successively
The first tab, the second tab and the third tab being arranged, the first tab material are aluminium, and the second tab material is aluminium nickel
Composite material, the third tab material are nickel or cupro-nickel composite material.
2. lithium Fe battery positive pole ear according to claim 1, which is characterized in that the width of the lithium Fe battery positive pole ear
Degree be 2-4mm, the lithium Fe battery positive pole ear with a thickness of 0.08-0.2mm.
3. lithium Fe battery positive pole ear according to claim 1, which is characterized in that the length of first tab is 15-
40mm, the length of second tab are 2-3mm, and the length of the third tab is 2-10mm.
4. lithium Fe battery positive pole ear according to claim 1, which is characterized in that the aluminium nickel composite material is selected from aluminium nickel
Alloy, aluminium-to-nickel or nickel one of are aluminized, preferably aluminium-to-nickel；
Preferably, the copper-nickel composite material turns one of copper, preferably copper nickel plating selected from corronil, copper nickel plating or nickel.
5. lithium Fe battery positive pole ear according to claim 1, which is characterized in that be coated with pole on institute's first tab
Ear glue；
Preferably, the gel is coated on first tab close to one end of second tab.
6. lithium Fe battery positive pole ear according to claim 1, which is characterized in that set on the lithium Fe battery positive pole ear
It is equipped with tab gummed paper.
7. a kind of lithium Fe battery, which is characterized in that including lithium Fe battery positive pole ear described in any one of claims 1-6.
8. lithium Fe battery according to claim 7, which is characterized in that further include positive plate and nut cap, positive plate includes just
One end of pole collector, the lithium Fe battery positive pole ear is fixedly connected with the plus plate current-collecting body, the lithium Fe battery anode
The other end of tab is fixedly connected with nut cap.
9. lithium Fe battery according to claim 8, which is characterized in that further include negative electrode tab and diaphragm, the negative electrode tab with
The positive plate is oppositely arranged, and the diaphragm is set between the positive plate and the negative electrode tab.
10. lithium Fe battery according to claim 9, which is characterized in that the positive plate by ferrous disulfide, conductive agent,
Bonding agent and imbibition agent are coated on plus plate current-collecting body and are compacted；
Preferably, the negative electrode tab is lithium band or lithium-aluminium alloy band；
Preferably, the diaphragm is polypropylene porous film, polyethylene porous membrane or polyethylene and polypropylene composite materials perforated membrane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810861507.4A CN108963176B (en) | 2018-08-01 | 2018-08-01 | Lithium iron battery positive pole tab and lithium iron battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810861507.4A CN108963176B (en) | 2018-08-01 | 2018-08-01 | Lithium iron battery positive pole tab and lithium iron battery |
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| Publication Number | Publication Date |
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| CN108963176A true CN108963176A (en) | 2018-12-07 |
| CN108963176B CN108963176B (en) | 2021-08-27 |
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Citations (16)
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