CN110224103A - Preparation method for the tab of battery, lithium ion battery and lithium ion battery - Google Patents
Preparation method for the tab of battery, lithium ion battery and lithium ion battery Download PDFInfo
- Publication number
- CN110224103A CN110224103A CN201910676770.0A CN201910676770A CN110224103A CN 110224103 A CN110224103 A CN 110224103A CN 201910676770 A CN201910676770 A CN 201910676770A CN 110224103 A CN110224103 A CN 110224103A
- Authority
- CN
- China
- Prior art keywords
- tab
- connecting portion
- cover board
- lithium ion
- shell
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- 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
-
- 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
- H01M10/058—Construction or manufacture
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The present invention relates to technical field of lithium ion, and in particular to a kind of preparation method for the tab of battery, lithium ion battery and lithium ion battery.A kind of tab for battery, including pet layer and metal foil layer, the opposite two sides of the pet layer are respectively arranged with the metal foil layer.Have the advantages that bending strength height, light weight, tenor are few by the tab that metal foil layer and pet layer form.When piercing through experiment, positive and negative anodes directly contact possibility reduction, and explosion probability on fire reduces；In welding, the metallic dust of generation is few, and workshop environment is improved.
Description
Technical field
The present invention relates to technical field of lithium ion, and in particular to it is a kind of for the tab of battery, lithium ion battery and
The preparation method of lithium ion battery.
Background technique
Lithium ion battery technology is one of key technology of Development of Electric Vehicles, in most of lithium battery currently on the market
Main structure in, using ultra-thin electrolyte metal foil as positive and negative electrode conductor, to guarantee ultra-thin electrolyte metal foil and electricity
Active material comes into full contact in pond, and ultra-thin electrolyte metal foil often selects the copper foil and aluminium foil that internal resistance is small, ductility is good.Wherein,
Anode uses ultra-thin electrolyte aluminium foil, and cathode uses ultrathin electrolytic copper foil.The foil configuration of positive and negative battery core extension is known as pole
Ear.
The copper foil and aluminium foil of the prior art, i.e. foil, not only generate a large amount of metallic dust, but also make in the welding process
With the battery core of the foil in piercing through experiment, as shown in figure 5, foil stress is bent, causes positive and negative anodes directly to contact and short-circuit, draw
The events such as explosion on fire are played to occur.
Summary of the invention
For the drawbacks described above at prior art center, the present invention provide it is a kind of for the tab of battery, lithium ion battery and
The preparation method of lithium ion battery, when piercing through experiment, positive and negative anodes directly contact possibility reduction, and explosion probability on fire reduces；
In welding, the metallic dust of generation is few, and workshop environment is improved.
To achieve the above object, the present invention provides the following technical scheme that
A kind of tab for battery, including pet layer and metal foil layer, the opposite two sides of the pet layer are respectively arranged with
The metal foil layer.
In a kind of wherein possible implementation, the metal foil layer with a thickness of 0.3~3 μm, pet layer with a thickness of
5~15 μm.
A kind of lithium ion battery, comprising: shell, cover board, battery core and tab；
The shell has opening, and the opening is equipped with the cover board；
The cover board is equipped with pole, and one end of the tab is connected with the pole；The other end of the tab
It is connected with battery core；
The cover board and the shell enclose accommodating space, and the battery core and the tab are arranged in the accommodating space
It is interior；
The tab is such as aforementioned described in any item tabs.
In a kind of wherein possible implementation, connection sheet is equipped between the pole and the tab.
In a kind of wherein possible implementation, the cover board side is abutted with the outer casing inner wall, and cover board deviates from institute
The surface for stating accommodating space is equipped with first connecting portion, and the first connecting portion extends along the direction far from the accommodating space, and
There is spacing between the first connecting portion and the side of the cover board；
One end of shell towards the opening is provided with second connecting portion, the second connecting portion and the first connecting portion
Connection.
In a kind of wherein possible implementation, the first connecting portion has connect with second connecting portion first to connect
Junction, first joint face have at least partially inclined-plane；From towards one end of the cover plate main body to the other end, the inclined-plane
It is increasingly towards the centerline dip of the lithium ion battery；
The second connecting portion has the second joint face compatible with first joint face.
In a kind of wherein possible implementation, the first connecting portion and the cover plate main body enclose positioning sky
Between, the located space is for accommodating locating piece；It is fixed that the first connecting portion is provided with away from the side of first joint face
Plane, the positioning surface are used to cooperate with the locating piece.
In a kind of wherein possible implementation, the tab includes multilayer；Adjacent two layers pass through ultrasonic bonding skill
Art welding.
A kind of preparation method of lithium ion battery, comprising:
Take shell；
Battery core, tab, connection sheet, pole are taken, the battery core, tab, connection sheet, cover board are packed into the shell；
Locating piece is taken, by the positioning sky that the locating piece is packed into the cover plate main body of the cover board and first connecting portion encloses
Between in, and the positioning surface of the locating piece and first connecting portion is offseted；
By EMPT welding technique, so that the first connecting portion of the second connecting portion towards the cover board is bent until institute
Second connecting portion is stated to be bonded with the joint face of first connecting portion；
The second connecting portion and first connecting portion are welded by EMPT；
After completing the second connecting portion and first connecting portion welding, the locating piece is removed.
It is described that the battery core, tab, connection sheet, pole are packed into outside described in a kind of wherein possible implementation
In shell, comprising:
The tab is connect with the battery core；Wherein, the tab includes multilayer, and adjacent two layers pass through ultrasonic bonding
Technology welding；
The tab and the connection sheet are linked together by EMPT welding technique；
The pole in the connection sheet and the cover board is linked together by EMPT welding technique；
The battery core is put into the shell；
The battery core welded together, tab, connection sheet, cover board are put into shell；And make the cover board and outer
Shell inner wall offsets.
In conclusion the invention has the following advantages that
1, have the advantages that bending strength height, light weight, tenor are few by the tab that metal foil layer and pet layer form.
When piercing through experiment, positive and negative anodes directly contact possibility reduction, and explosion probability on fire reduces；In welding, the metal powder of generation
Dirt is few, and workshop environment is improved；
2, tab and connection sheet connection, the connection of band battery core connection sheet cover board, cover board and cage connection, all use EMPT technology
Welding.Which is not fastidious to welding material, not high to weld preparation required precision, and without heat input, workpiece is without heat affected area
It influences, weld interval is extremely short, and welding process was completed at 3~5 seconds.With raising production efficiency, improve energy utilization rate, saving energy
The advantages of source, no pollution zero-emission.
In addition to the embodiment of the present invention described above solve the technical issues of, constitute technical solution technical characteristic and
Outside the beneficial effect as brought by the technical characteristic of these technical solutions, the other technologies that the embodiment of the present invention can solve are asked
The other technical characteristics and these technical characteristic bring beneficial effects for including in topic, technical solution, will be in specific embodiment party
Further details of explanation is made in formula.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is the cross-sectional view of the tab provided according to an exemplary embodiment；
Fig. 2 is schematic diagram when being punctured according to the tab that an exemplary embodiment provides；
When Fig. 3 is the cover board and unwelded shell provided according to an exemplary embodiment, the cross-sectional view of lithium ion battery；
Fig. 4 is the cross-sectional view of lithium ion battery after the cover board provided according to an exemplary embodiment and shell welding；
Fig. 5 is schematic diagram when being punctured according to the paillon that an exemplary embodiment provides.
Description of symbols:
1, tab；11, metal foil layer；12, pet layer；13, positive pole ear；131, aluminium foil layer；14, negative lug；141, copper
Layers of foil；2, lithium ion battery；21, battery core；22, connection sheet；23, cover board；24, pole；25, shell；3, first connecting portion；4,
Two interconnecting pieces；5, locating piece.
Through the above attached drawings, it has been shown that the specific embodiment of the present invention will be hereinafter described in more detail.These attached drawings
It is not intended to limit the scope of the inventive concept in any manner with verbal description, but is by referring to specific embodiments
Those skilled in the art illustrate idea of the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.In the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
As shown in Figure 1, the present embodiment provides a kind of tab for battery, including pet layer 12 and metal foil layer 11, PET
12 opposite two sides of layer are respectively arranged with metal foil layer 11.
PET has heat-resisting height, bending strength 200MPa, and elasticity modulus reaches 4000MPa, and creep resistance and fatigability are also fine,
The high advantage of surface hardness.When piercing through experiment, as shown in Fig. 2, PET is squeezed power, material mobile to needling direction two sides
Overall offset amount significantly reduces, and positive and negative anodes directly contact possibility reduction, and explosion probability on fire reduces；
PET can be used as adhesive, so metal foil layer 11 and pet layer 12 are connected to by the viscosity of PET
Together；Light weight of the PET compared to metal, the light weight of manufactured tab 1；
Tenor in tab 1 is few compared to the tenor of the existing tab 1 of condition of equivalent thickness, in this way, tab 1 exists
In welding process, the Dust Capacity of generation is smaller, and security performance is more preferable.
In conjunction with shown in Fig. 2 and Fig. 3, specifically, in a lithium ion battery 2, including positive pole ear 13 and negative lug 14.
Positive pole ear 13 includes two layers of aluminium foil layer 131 and one layer of pet layer 12, and pet layer 12 is clipped in the middle by two layers of aluminium foil layer 131；Cathode
Tab 14 includes two layers of copper foil layer 141 and one layer of pet layer 12, and pet layer 12 is clipped in the middle by two layers of copper foil layer 141.
As shown in Figure 1, in a kind of wherein possible implementation, metal foil layer 11 with a thickness of 0.3~3 μm, pet layer
12 with a thickness of 5~15 μm.
The thickness of copper foil and aluminium foil in the prior art is respectively 6 μm, 12 μm, the thickness of metal foil and pet layer 12
Thickness can according to need adjustment.
Specifically, the attainable technique of existing technology institute is pet layer 12 with a thickness of 10 μm, metal foil layer 11 with a thickness of
0.5μm。
In a kind of wherein possible implementation, tab 1 includes multilayer, and adjacent two layers tab 1 passes through ultrasonic bonding
Technology welds together.
The thickness of single layer tab 1 is excessively thin, and Multilayer pole ear 1 is welded together, and is increased by way of increasing by 1 thickness of tab
Add the intensity of tab 1.So that the tab 1 after thickening is not susceptible to bending deformation.
Specifically, ultrasonic bonding mode, the welding manner principle are, under conditions of carrying out high-pressure extrusion to material,
High frequency oscillation is generated by issuing ultrasonic wave, intermolecular force is destroyed and reconnects.Tenor in novel paillon is few, institute
With when using ultrasonic bonding, the metal powder of generation is few.
Since pet layer 12 is nonconducting, so, it is using the step of ultrasonic bonding.
The first step, first by a tab 1, the metal foil layer 11 at the both ends of 12 thickness direction of pet layer welds together.By
Heated in the pet layer 12 between double layer of metal layers of foil 11 is movable, so, when welding, pet layer 12 is directed away from welding
Position is mobile, in this way, double layer of metal layers of foil 11 is welded together.
Second step welds together Multilayer pole ear 1.Multilayer pole ear 1 stacks in layer 12 and sets welding.
As shown in figure 3, the present embodiment provides a kind of lithium ion batteries 2, comprising: shell 25, cover board 23, battery core 21 and pole
Ear 1；
Shell 25 has opening, and opening is equipped with cover board 23；
Cover board 23 is equipped with pole 24, and tab 1 and pole 24 connect；
Cover board 23 and shell 25 enclose accommodating space, and battery core 21 and tab 1 are arranged in accommodating space；
Tab 1 is such as any one of aforementioned tab 1.
Battery core 21, tab 1 are placed in the accommodating space that shell 25 and cover board 23 are surrounded, battery core 21 and tab 1, tab
Connection between 1 and cover board 23 is hidden in accommodating space.It is not easy because the reason of colliding makes the connection between them disconnected
Fall.Meanwhile the whole holding of lithium ion battery 2 is clean and tidy, is routed convenient for operator.
Specifically, 25 upper end of shell is in opening setting.When installation, battery core 21, tab 1, cover board 23 as a whole from
Top to bottm is filled in shell 25.The side wall of cover board 23 is abutted with the inner wall of shell 25.In this way, cover board 23 will not produce in shell 25 again
Raw circumferential displacement.
The material of shell 25 is aluminium.Aluminium has good plasticity, can be manufactured by extrusion process variform
Product.Technical maturity, just official, processability are high for price；The perfect heat-dissipating of aluminium can absorb 21 charge and discharge process of battery core
In expansive force, important protective effect is played to battery core 21.
As shown in figure 3, being equipped with connection sheet 22 between pole 24 and tab 1 in a kind of wherein possible implementation.
The shortcomings that other way tab 1 and pole 24 are directly connected to:
The shortcomings that ultrasonic wave metal welding is directlyed adopt between tab 1 and pole 24 is:
The strength of joint that ultrasonic bond is formed is still relatively relatively low.Due to metal ultrasonic welding required horsepower with thickness of workpiece and
The raising of hardness exponentially increases severely, and when the increase of lithium battery design capacitance amount, when leading to pole 24 and excessive gasket design thickness, surpasses
Sound vibration energy can not penetrate blocked up pole 24 or gasket, so as to cause rosin joint.
The shortcomings that tab 1 and pole 24 are bolted connection is:
Punching riveting process may cause the impurity, i.e. fifth wheel such as metal fillings residual, electrode material clast.In battery charge and discharge
In electric process, these fifth wheels may pierce through diaphragm, lead to short circuit or micro-short circuit, to cause the decline of battery ability to work even
Failure；
Due to being mechanical interlock at riveted joint, intrinsic gap will lead to electrolyte and penetrate into inside connector between piece, pass through
Long-term charge and discharge process makes the sheet material surface oxidation that converges, and contact resistance is caused to increase rapidly, so that the larger internal resistance of cell is formed,
Reduce charge-discharge performance and the service life of battery.When high current charge-discharge, joint area can generate a large amount of heat, will greatly damage
Charge-discharge performance, safety and the service life of evil battery.
The advantages of by 22 connecting tab 1 of connection sheet and pole 24:
It is connected between pole 24 on tab 1 and cover board 23 by connection sheet 22.Then the thickness of connection sheet 22 is less than tab 1
Thickness.Reduce the thickness of battery entirety.
Specifically, connection sheet 22 is to be capable of conductive, and connection sheet 22 is mostly L-type or H-type, and when connection is connected by changing
The shape of contact pin 22 can connect the tab 1 of different location and pole 24.In this way, the placement location of tab 1 and pole 24
Select space big.
Optionally, some cover boards 23 are just connected with connection sheet 22 on pole 24 in production.At this point, first by connection sheet
22 change shape, connect its other end with tab 1.
Optionally, some cover boards 23 do not connect connection sheet 22 in production.Then need to select the company of suitable shape at this time
Contact pin 22.One end of connection sheet 22 is connect with tab 1 first, then the other end of connection sheet 22 and the pole 24 on cover board 23 are connected
It connects.
Optionally, tab 1 is connect with connection sheet 22, connection sheet 22 is connect with the pole 24 on cover board 23, all passes through EMPT
Technology welds together.In this way, there are gaps between connection sheet 22 and pole 24, connection sheet 22 and tab 1 before welding.
EMPT (full name in English is Electromagnetic Pulse Technology) is electromagnetic pulse welding technique.Root
According to physics electromagnetic induction theorem, an alternating magnetic field is generated, together by the effect of pulse current using a kind of special coil
When processed in part in outer layer 12 and will generate reverse induction electric current, induced current generates magnetic field and coil magnetic field interacts,
The Lorentz force of opposite direction will be generated between coil and outer ring, two power interact, and eventually lead to outer ring processing part with very
High speed forms welding to inner ring processing part fitting.
EMPT has not high to weld preparation required precision, and without heat input, workpiece is influenced without heat affected area, weld interval
Extremely short, welding process was completed at 3~5 seconds, effectively improved production efficiency, energy utilization rate is high, avoids energy waste, no pollution
The advantages of zero-emission.And when EMPT operation, temperature will not be increased, i.e., the region not influenced by high temperature, thus microstructure
It will not change.
There must be a gap according to EMPT Fundamentals of Welding, between weldment and welded part.Otherwise, if without
Gap, then weldment and welded part stress as a whole, and can not weld.So in welding, connection sheet 22 and pole
It 24, will there are gaps between connection sheet 22 and tab 1.
In conjunction with shown in Fig. 3 and Fig. 4, in a kind of wherein possible implementation, 23 side of cover board is supported with 25 inner wall of shell
It connects, cover board 23 is equipped with first connecting portion 3 away from the surface of accommodating space, and first connecting portion 3 is prolonged along the direction far from accommodating space
It stretches, and there is spacing between first connecting portion 3 and the side of cover board 23；
One end of shell 25 towards opening is provided with second connecting portion 4, and second connecting portion 4 is connect with first connecting portion 3.
Connection between cover board 23 and shell 25 uses EMPT technology.The edge of cover board 23 is abutted with 25 inner wall of shell,
So that circumferential shaking will not occur in shell 25 for cover board 23.It, must between weldment and welded part according to EMPT Fundamentals of Welding
There must be a gap.So there is spacing, so that second before unwelded between first connecting portion 3 and the side of cover board 23
Interconnecting piece 4 and first connecting portion 3 are set in distance.
In a kind of wherein possible implementation, first connecting portion 3 has the first connection connecting with second connecting portion 4
Face, the first joint face have at least partially inclined-plane；From one end towards 23 main body of cover board to the other end, inclined-plane be increasingly towards lithium from
The centerline dip of sub- battery 2；
Second connecting portion 4 has the second joint face compatible with the first joint face.
Since first connecting portion 3 has inclined face, so first connecting portion 3, when welding with second connecting portion 4, second connects
Socket part 4 can be bent under the Lorentz force effect of EMPT welding technique.In this way, the bending angle of second connecting portion 4 is compared
For first connecting portion 3 is all vertical plane, have the advantages that can control.
In a kind of wherein possible implementation, first connecting portion 3 and 23 main body of cover board enclose located space, position
Space is for accommodating locating piece 5；First connecting portion 3 is provided with positioning surface away from the side of the first joint face, positioning surface be used for
Locating piece 5 cooperates.
When being welded using EMPT technology, Fundamentals of Welding, moment leads to high pressure, to the induced electricity of one moment of weldment
Stream.Then a reversed Lorentz force is generated by induced current, is got to above weldment and is gone using reversed Lorentz force.The
One interconnecting piece, 3 moment stress increases.Add locating piece 5 in located space, locating piece 5 be first connecting portion 3 provide support force with
Resist Lorentz force.
Optionally, first connecting portion 3 includes two positioning ribs for being respectively arranged on the both ends of 23 length direction of cover board.Positioning
Part 5 is locating piece, and locating piece is set between two positioning ribs.Each positioning rib is set with adjacent 23 side of cover board in interval
It sets.
When being welded using EMPT, positioning rib be it is motionless, second connecting portion 4 draws close welding towards positioning rib.In this way,
The both ends of 23 length direction of cover board are all connect with shell 25, are connected more stable.And the position of welding is convenient for determination.It is welded according to EMPT
Principle is connect, so each positioning rib is set in distance with adjacent 23 side of cover board.I.e. before not welding, each positioning rib
Item and adjacent shell 25, which are spaced, to be arranged.
When welding, first locating piece is inserted between two positioning ribs, locating piece side wall and positioning surface push against.Work as welding
After the completion, locating piece is taken out.
The present embodiment provides a kind of preparation methods of lithium ion battery, comprising:
Take shell 25；
Battery core 21, tab 1, connection sheet 22, pole 24 are taken, battery core 21, tab 1, connection sheet 22, cover board 23 are packed into shell
In 25；
Locating piece is taken, by the located space that locating piece is packed into 23 main body of cover board of cover board 23 and first connecting portion 3 encloses
In, and locating piece and the positioning surface of first connecting portion 3 are offseted；
By EMPT welding technique, so that the first connecting portion 3 of second connecting portion 4 towards cover board 23 is bent until second connects
Socket part 4 is bonded with the joint face of first connecting portion 3；
Second connecting portion 4 and first connecting portion 3 are welded by EMPT；
After completing second connecting portion 4 and the welding of first connecting portion 3, locating piece is removed.
In a kind of wherein possible implementation, battery core 21, tab 1, connection sheet 22, pole 24 are packed into shell 25,
Include:
Tab 1 is connect with battery core 21；Wherein, tab 1 includes multilayer, and adjacent two layers are welded by ultrasonic welding technique
It connects；
Tab 1 and connection sheet 22 are linked together by EMPT welding technique；
Pole 24 in connection sheet 22 and cover board 23 is linked together by EMPT welding technique；
Battery core 21 is put into shell 25；
The battery core 21 welded together, tab 1, connection sheet 22, cover board 23 are put into shell 25；And make cover board 23 with
25 inner wall of shell offsets.
Wherein, the term of "upper", "lower" etc. is for describing the relative positional relationship of each structure in the accompanying drawings, only
Convenient for being illustrated for narration, rather than to limit the scope of the invention, relativeness is altered or modified, in no essence
It changes under technology contents, when being also considered as the enforceable scope of the present invention.
It should be understood that in the present invention unless specifically defined or limited otherwise, fisrt feature is in second feature
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact "up" or "down".
Moreover, fisrt feature can be above the second feature " above ", " above " and " above " fisrt feature right above second feature or tiltedly
Top, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature second feature " under ", " lower section " and
" following " can be fisrt feature and be directly under or diagonally below the second feature, or be merely representative of first feature horizontal height less than
Two features.
In addition, in the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
It is connected directly, the mutual of connection inside two elements or two elements can also be can be indirectly connected through an intermediary
Interactively.For the ordinary skill in the art, it can understand as the case may be above-mentioned term in the present invention
Concrete meaning.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are contained at least one embodiment or example of the disclosure.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can be combined in any suitable manner in any one or more of the embodiments or examples.
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 tab for battery, which is characterized in that including pet layer and metal foil layer, the opposite two sides of the pet layer point
It is not provided with the metal foil layer.
2. a kind of tab for battery according to claim 1, which is characterized in that the metal foil layer with a thickness of
0.3~3 μm, the pet layer with a thickness of 5~15 μm.
3. a kind of lithium ion battery characterized by comprising shell, cover board, battery core and tab；
The shell has opening, and the opening is equipped with the cover board；
The cover board is equipped with pole, and one end of the tab is connected with the pole；The other end and battery core of the tab connect
It connects；
The cover board and the shell enclose accommodating space, and the battery core and the tab are arranged in the accommodating space；
The tab is the described in any item tabs of claim 1-2.
4. a kind of lithium ion battery according to claim 3, which is characterized in that be equipped between the pole and the tab
Connection sheet.
5. a kind of lithium ion battery according to claim 4, which is characterized in that the cover board side and the outer casing inner wall
It abuts, cover board is equipped with first connecting portion away from the surface of the accommodating space, and the first connecting portion is along empty far from the receiving
Between direction extend, and between the first connecting portion and the side of the cover board have spacing；
One end of shell towards the opening is provided with second connecting portion, and the second connecting portion and the first connecting portion connect
It connects.
6. a kind of lithium ion battery according to claim 5, which is characterized in that the first connecting portion has to be connected with second
First joint face of socket part connection, first joint face have at least partially inclined-plane；From one end towards the cover plate main body
To the other end, the inclined-plane is increasingly towards the centerline dip of the lithium ion battery；
The second connecting portion has the second joint face compatible with first joint face.
7. a kind of lithium ion battery according to claim 5, which is characterized in that the first connecting portion and the cover board master
Body encloses located space, and the located space is for accommodating locating piece；The first connecting portion deviates from first joint face
Side be provided with positioning surface, the positioning surface is used for and the locating piece cooperates.
8. according to a kind of described in any item lithium ion batteries of claim 3-7, which is characterized in that the tab includes multilayer；
Adjacent two layers are welded by ultrasonic welding technique.
9. a kind of based on a kind of described in any item preparation methods of lithium ion battery of claim 3-8, which is characterized in that packet
It includes:
Take shell；
Battery core, tab, connection sheet, pole are taken, the battery core, tab, connection sheet, cover board are packed into the shell；
Locating piece is taken, by the located space that the locating piece is packed into the cover plate main body of the cover board and first connecting portion encloses
In, and the positioning surface of the locating piece and first connecting portion is offseted；
By EMPT welding technique so that the second connecting portion towards the cover board first connecting portion bending until described the
Two interconnecting pieces are bonded with the joint face of first connecting portion；
The second connecting portion and first connecting portion are welded by EMPT；
After completing the second connecting portion and first connecting portion welding, the locating piece is removed.
10. a kind of preparation method of lithium ion battery according to claim 9, which is characterized in that it is described by the battery core,
Tab, connection sheet, pole are packed into the shell, comprising:
The tab is connect with the battery core；Wherein, the tab includes multilayer, and adjacent two layers pass through ultrasonic welding technique
Welding；
The tab and the connection sheet are linked together by EMPT welding technique；
The pole in the connection sheet and the cover board is linked together by EMPT welding technique；
The battery core is put into the shell；
The battery core welded together, tab, connection sheet, cover board are put into shell；And make the cover sidewall and outer
Shell inner wall offsets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910676770.0A CN110224103A (en) | 2019-07-25 | 2019-07-25 | Preparation method for the tab of battery, lithium ion battery and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910676770.0A CN110224103A (en) | 2019-07-25 | 2019-07-25 | Preparation method for the tab of battery, lithium ion battery and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110224103A true CN110224103A (en) | 2019-09-10 |
Family
ID=67813913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910676770.0A Pending CN110224103A (en) | 2019-07-25 | 2019-07-25 | Preparation method for the tab of battery, lithium ion battery and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110224103A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111129419A (en) * | 2020-01-21 | 2020-05-08 | 瑞海泊(青岛)能源科技有限公司 | Battery tab structure, preparation method thereof and water-based battery |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015139960A (en) * | 2014-01-29 | 2015-08-03 | 凸版印刷株式会社 | Terminal film for electricity-storing device, and electricity-storing device |
| CN105789491A (en) * | 2014-12-23 | 2016-07-20 | 比亚迪股份有限公司 | Battery housing and preparation method thereof, battery, battery bank, battery pack and electric vehicle |
| CN105789500A (en) * | 2014-12-23 | 2016-07-20 | 比亚迪股份有限公司 | Battery housing and manufacturing method thereof, battery, battery bank, battery pack and electric vehicle |
| JP2016184494A (en) * | 2015-03-26 | 2016-10-20 | Ｊｘ金属株式会社 | Tab lead material for film exterior package battery and manufacturing method for the same |
| CN206040872U (en) * | 2016-08-31 | 2017-03-22 | 惠州市元大电子科技有限公司 | Cell structure of lithium ion battery |
| CN107221676A (en) * | 2017-06-30 | 2017-09-29 | 江苏道赢科技有限公司 | A kind of lithium rechargeable battery of composite current collector and the application collector |
| CN206878086U (en) * | 2017-06-28 | 2018-01-12 | 宁德时代新能源科技股份有限公司 | Secondary cell and battery modules |
| CN108417841A (en) * | 2018-02-09 | 2018-08-17 | 深圳前海优容科技有限公司 | Battery, battery battery core, collector and preparation method thereof |
| CN208539000U (en) * | 2018-03-15 | 2019-02-22 | 宁德时代新能源科技股份有限公司 | The welder and process equipment of secondary cell collector |
-
2019
- 2019-07-25 CN CN201910676770.0A patent/CN110224103A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015139960A (en) * | 2014-01-29 | 2015-08-03 | 凸版印刷株式会社 | Terminal film for electricity-storing device, and electricity-storing device |
| CN105789491A (en) * | 2014-12-23 | 2016-07-20 | 比亚迪股份有限公司 | Battery housing and preparation method thereof, battery, battery bank, battery pack and electric vehicle |
| CN105789500A (en) * | 2014-12-23 | 2016-07-20 | 比亚迪股份有限公司 | Battery housing and manufacturing method thereof, battery, battery bank, battery pack and electric vehicle |
| JP2016184494A (en) * | 2015-03-26 | 2016-10-20 | Ｊｘ金属株式会社 | Tab lead material for film exterior package battery and manufacturing method for the same |
| CN206040872U (en) * | 2016-08-31 | 2017-03-22 | 惠州市元大电子科技有限公司 | Cell structure of lithium ion battery |
| CN206878086U (en) * | 2017-06-28 | 2018-01-12 | 宁德时代新能源科技股份有限公司 | Secondary cell and battery modules |
| CN107221676A (en) * | 2017-06-30 | 2017-09-29 | 江苏道赢科技有限公司 | A kind of lithium rechargeable battery of composite current collector and the application collector |
| CN108417841A (en) * | 2018-02-09 | 2018-08-17 | 深圳前海优容科技有限公司 | Battery, battery battery core, collector and preparation method thereof |
| CN208539000U (en) * | 2018-03-15 | 2019-02-22 | 宁德时代新能源科技股份有限公司 | The welder and process equipment of secondary cell collector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111129419A (en) * | 2020-01-21 | 2020-05-08 | 瑞海泊(青岛)能源科技有限公司 | Battery tab structure, preparation method thereof and water-based battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101834305B (en) | Rechargeable battery | |
| WO2019148663A1 (en) | Secondary battery | |
| KR100637443B1 (en) | Secondary battery and terminal assembly using the same | |
| EP2425471B1 (en) | Single cell and battery pack comprising the same | |
| CN111987340B (en) | Battery unit, manufacturing method thereof and battery module | |
| CN102244209B (en) | Square lithium ion power battery | |
| EP2783406B1 (en) | Battery comprising an electric connector | |
| EP3907819B1 (en) | Secondary battery | |
| KR20080095612A (en) | Secondary battery | |
| CN106025119A (en) | Prismatic secondary battery | |
| WO2010130173A1 (en) | Battery spacer, protection assembly for electric core and power battery | |
| CN206820055U (en) | The hardwired lithium battery structure of lug | |
| CN111048729A (en) | Welding-free sticking type assembling structure of lithium battery electrode | |
| CN210805936U (en) | Single battery and power battery pack | |
| CN110224103A (en) | Preparation method for the tab of battery, lithium ion battery and lithium ion battery | |
| JP2005235763A (en) | Secondary battery | |
| CN115332693A (en) | Secondary battery and electronic device | |
| CN102324474B (en) | Connecting device between assemble batteries | |
| CN214706177U (en) | Pole core and battery and equipment with same | |
| JP5286628B2 (en) | battery | |
| CN205069739U (en) | Battery tab connecting piece and have lithium cell of this battery tab connecting piece | |
| CN114566768A (en) | Pole piece, electrochemical device and electronic equipment | |
| CN108172748A (en) | Lug and manufacturing method, the lithium battery and manufacturing method with the lug | |
| US11050116B2 (en) | Secondary battery | |
| CN208315675U (en) | A kind of cylindrical battery configuration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190910 |