CN207009539U - Pole piece and battery core - Google Patents
Pole piece and battery core Download PDFInfo
- Publication number
- CN207009539U CN207009539U CN201720827888.5U CN201720827888U CN207009539U CN 207009539 U CN207009539 U CN 207009539U CN 201720827888 U CN201720827888 U CN 201720827888U CN 207009539 U CN207009539 U CN 207009539U
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- Prior art keywords
- lug
- pole piece
- collector
- zone
- weld zone
- Prior art date
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The application is related to cell art, more particularly to a kind of pole piece and battery core.The pole piece includes pole piece body, lug and conducting resinl, pole piece body includes the active material layer of collector and setting on a current collector, lug connecting portion is provided with collector, lug connecting portion is not provided with active material layer, lug connecting portion includes the first adhesion zone and the first weld zone, lug includes the second adhesion zone and the second weld zone, and the first adhesion zone is fixed with the second adhesion zone by conductive adhesive, and the first weld zone and the second weld zone are welded and fixed.So on the one hand design can increase the conductive area between collector and lug, so as to reduce the contact resistance between collector and lug；On the other hand, the weld zone fusing in welding process on lug connecting portion, due to there is the presence of conducting resinl, lug and collector will not also disconnected, so as to ensure that the connection reliability between lug and collector.
Description
Technical field
The application is related to cell art, more particularly to a kind of pole piece and battery core.
Background technology
Battery includes both positive and negative polarity pole piece and the lug being arranged on pole piece, and pole piece includes collector and set on a current collector
Coating layer of active substance, lug is connected with collector.Lug is provided with two kinds at present, and one kind is directly to cut out on a current collector
Lug；Another kind be by tab welding on a current collector.Method complex process is cut out, welding is easier to realize in technique, so
The more of field is welding at present.
But welding can bring many quality problems, such as can often occur in the welding process of lug and collector
Cross the problems such as weldering, rosin joint or base material are torn.These problems can cause the loose contact between lug and collector, make contact resistance
Become big, so as to influence the charging and discharging capabilities of battery core.More seriously make battery core can not be with other external devices of electronic product
Conducting, so that electronic product can not use.
Utility model content
This application provides a kind of pole piece and battery core, while the energy density of battery core is ensured, additionally it is possible to improve lug
Connective stability between collector.
The application first aspect provides a kind of pole piece, and it includes pole piece body, lug and conducting resinl,
The pole piece body includes collector and the active material layer that is arranged on the collector, on the collector
Lug connecting portion is provided with, the lug connecting portion is not provided with the active material layer,
The lug connecting portion includes the first adhesion zone and the first weld zone, and the lug includes the second adhesion zone and second
Weld zone, first adhesion zone are fixed with second adhesion zone by the conductive adhesive, first weld zone and
Second weld zone is welded and fixed.
Preferably, second weld zone is provided with multiple, and multiple second weld zones are arranged at intervals, and two neighboring
Second adhesion zone is provided between second weld zone.
Preferably, length direction of each second weld zone along the lug is arranged at intervals.
Preferably, each second weld zone is elongated, and the bearing of trend of each second weld zone is the lug
Width.
Preferably, the thickness of the conducting resinl is less than 100 microns.
Preferably, the conducting resinl includes glue-line matrix and electric conductor, and the electric conductor is dispersed in the glue-line matrix,
Mass percent of the electric conductor in the glue-line matrix is 10%~30%.
Preferably, the glue-line matrix is included in silicon rubber, polyurethane rubber, neoprene, PUR, tackifying resin
At least one, the electric conductor include at least one of gold, silver, copper, aluminium, nickel, graphite.
Preferably, the electric conductor includes at least one of conductive particle, conductive fiber, conducting strip.
Preferably, the conducting resinl includes two layers of glue-line matrix and the conductive base between the glue-line matrix
Layer.
The application second aspect provides a kind of battery core, and it includes the pole piece described in any of the above-described embodiment.
The technical scheme that the application provides can reach following beneficial effect：
Lug connecting portion on lug and collector in pole piece provided herein is realizing weldering by welding procedure
While connecing, also realized and be bonded by conducting resinl, due to adding bonding force, thus do not need too strong weld strength
Ensure that lug is securely attached on collector.And it can also reduce the contact resistance between collector and lug, so as to be lifted
The charging and discharging capabilities of battery core with the pole piece；On the other hand, the weld zone in welding process on lug connecting portion melts
It is disconnected, due to there is the presence of conducting resinl, lug and collector will not also disconnected, so as to ensure that the company between lug and collector
Connect reliability.
It should be appreciated that the general description and following detailed description of the above are only exemplary, this can not be limited
Application.
Brief description of the drawings
The overlooking the structure diagram for the pole piece that Fig. 1 is provided by the embodiment of the present application；
The positive structure diagram for the pole piece that Fig. 2 is provided by the embodiment of the present application；
The side structure schematic view for the pole piece that Fig. 3 is provided by the embodiment of the present application；
A kind of structural representation of conducting resinl in the pole piece that Fig. 4 is provided by the embodiment of the present application；
The structural representation of another conducting resinl in the pole piece that Fig. 5 is provided by the embodiment of the present application.
Reference：
10- pole piece bodies；
100- collectors；
The adhesion zones of 100a- first；
The weld zones of 100b- first；
101- active material layers；
20- lugs；
The adhesion zones of 200- second；
The weld zones of 201- second；
30- conducting resinls；
300- glue-line matrixes；
301- electric conductors；
302- conductive substrates；
40- encapsulants.
Accompanying drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the application
Example, and be used to together with specification to explain the principle of the application.
Embodiment
The application is described in further detail below by specific embodiment and with reference to accompanying drawing.
As shown in Figures 1 to 5, the embodiment of the present application provides a kind of pole piece, and it includes pole piece body 10, lug 20 and led
Electric glue 30.Pole piece body 10 includes collector 100 and the active material layer 101 being arranged on collector 100, this collector
Lug connecting portion is provided with 100, the lug connecting portion is not provided with active material layer 101.Specifically, the lug connecting portion bag
The first adhesion zone 100a and the first weld zone 100b are included, and lug 20 includes the second adhesion zone 200 and the second weld zone 201, its
In, the first adhesion zone 100a is adhesively fixed with the second adhesion zone 200 by conducting resinl 30, the welding of the first weld zone 100b and second
Area 201 is welded and fixed.
Based on said structure, in welding process, the first weld zone 100b on lug connecting portion and the on lug 20
Gap between two weld zones 201 disappears because of the down force pressure of soldering tip, so that lug 20 keeps good with collector 100
Weld strength；Meanwhile soldering tip push during pressure also can be so that conducting resinl 30 be by lug 20 be bonded with collector 100
It is more firm.That is, lug 20 is realizing the same of welding with the lug connecting portion on collector 100 by welding procedure
When, it can also be realized and be bonded by conducting resinl 30, due to adding bonding force, thus not need too strong weld strength to ensure
Lug is securely attached on collector, and reduces the contact resistance between collector 100 and lug 20, is had so as to be lifted
The charging and discharging capabilities of the battery core of the pole piece；On the other hand, in welding process on lug connecting portion weld zone fusing or
There is rosin joint in person's lug 20, due to there is the presence of conducting resinl 30, will not also make lug 20 and collector 100 with lug connecting portion
Disconnect, so as to ensure that the connection reliability between lug 20 and collector 100.
In one embodiment of the application, as shown in figure 3, above-mentioned second weld zone 201 be provided with it is multiple, multiple second
Weld zone 201 is arranged at intervals, and the second adhesion zone 200 is provided between two neighboring second weld zone 201.By lug 20 with
During collector 100 is welded, the conducting resinl 30 between the first adhesion zone 100a and the second adhesion zone 200 is two
Under the pressure of the soldering tip of side, it can be evenly distributed between the first adhesion zone 100a and the second adhesion zone 200, to ensure first
Adhesion zone 100a and the bonding reliability of the second adhesion zone 200, so as to ensure that the connection between lug 20 and collector 100 is reliable
Property.
As shown in figure 3, length direction of each second weld zone 201 along lug 20 is arranged at intervals, so designing not only can be with
Increase the conductive area between collector 100 and lug 20, so as to reduce the contact resistance between collector 100 and lug 20,
Then the charging and discharging capabilities of battery core of the lifting with the pole piece, and also ensure the stable connection of lug 20 and collector 100
Property, the welding difficulty of reduction lug 20 and collector 100.What deserves to be explained is the length direction of lug 20 is shown in Fig. 1
Z-direction.
Further, as shown in figures 1 and 3, each second weld zone 201 is elongated, the extension of each second weld zone 201
Direction is the width of lug 20, and so design can increase the bonding area between collector 100 and lug 20, ensure lug
Welding stability between 20 and collector 100.What deserves to be explained is the length direction of the lug 20 is the Y side shown in Fig. 1
To.
In addition, the thickness of the conducting resinl 30 is less than 100 microns, so design can avoid coating thickness blocked up, so as to cause
The excessive situation for causing failure welding of welding region of lug 20 and collector 100 in welding process, ensure that lug 20 and collection
The good contact of fluid 100.
In one embodiment of the application, as shown in figure 4, the conducting resinl 30 includes glue-line matrix 300 and electric conductor
301, electric conductor 301 is dispersed in glue-line matrix 300, and mass percent of the electric conductor 301 in glue-line matrix 300 is 10%
~30%, it is chosen as 15~20%.Now, electric conductor 301 can not only be well dispersed in glue-line matrix 300, moreover it is possible to part
Expose glue-line matrix 300, realize the conducting between conducting resinl 30 and adhering object.Alternatively, electric conductor 301 is in glue-line matrix
The quality upper limit in 300 is 30%, 25%, 20% or 15%, quality level 10%, 15%, 20% or 25%.Electric conductor
301 contents are too small, and conductance is relatively low, can not meet conductive needs；The content of electric conductor 301 is excessive, accordingly reduces glue-line
The content of bonding agent in matrix 300, the adhesive property of conducting resinl 30 is caused to decline.
Alternatively, above-mentioned glue-line matrix 300 includes silicon rubber, polyurethane rubber, neoprene, PUR, tackifying resin
At least one of, using above-mentioned glue-line matrix 300, the high conductivity of glue-line matrix 300 can be not only realized, can also be in electricity
Keep higher caking property and electric conductivity in solution matter environment, and electrolyte ingredient will not be changed, so as to ensure battery core capacity and
Cycle life is unaffected.
Wherein, silicon rubber is mainly made up of the silica chain link containing methyl and a small amount of vinyl, can also introduce phenyl, trifluoro
Propyl group and cyano group.Silicon rubber divides heat vulcanization type (high temperature vulcanized silica gel HTV) and room temperature vulcanized (RTV), wherein room temperature vulcanized
Divide polycondensation reaction type and addition reaction-type again.Heat vulcanized silicone rubber dosage is maximum, can divide methyl silicone rubber (MQ), methyl second again
Alkenyl silicon rubber (VMQ, dosage and product grade are most), methyl vinyl phenyl silicon rubber PVMQ (low temperature resistant, radiation hardness), its
It also has nitrile silicone rubber, fluorosioloxane rubber etc..
Polyurethane rubber (polyurethane rubber) is to contain more carbamate groups on main polymer chain
Series of elastic body material, actually polyurethane rubber, referred to as polyurethane rubber or urethane rubber (urethane
) or polyurethane elastomer (polyurethane elastomer) rubber.Polymer chain in addition to containing carbamate groups,
Also containing ester group, ether, urea groups, aryl and aliphatic chain etc..It is typically anti-by oligomer polyol, polyisocyanates and chain extender
It should form.Polyurethane rubber forms different structure and kind with the difference using raw material and proportioning, reactive mode and condition etc.
Type.
Neoprene, also known as chloroprene rubber, it is to be entered by chlorobutadiene (i.e. 2- chloro-1,3-butadienes) for primary raw material
Row α-polymerization and the synthetic rubber produced.Specific species includes CR122 types neoprene, CR232 types neoprene, CR2441
2442 type neoprenes, the type neoprenes of CR321 322 etc..
PUR (Hot Glue) is a kind of adhesive of plasticity, and its physical state is with temperature in certain temperature range
Change and change, and chemical characteristic is constant, its is nonpoisonous and tasteless, belongs to environmental-protecting chemical product.Its product is solid in itself, is easy to wrap
Dress, transport, storage, solvent-free, pollution-free, nontoxic type；And simple production process, high added value, bonding strength is big, speed is fast.
Tackifying resin is to refer to improve elastomeric material viscosity, the especially micromolecular compound of surface viscosity.Generally this
The relative molecular mass of a little small-molecule substances has higher glass transition temperature about between hundreds of to one ten thousand.By its source
And synthetic route, it can be largely classified into natural products and its derivative and the major class of synthetic resin two.Tackifying resin is primarily used to
The modification of polymer, it is widely used in adhesive, coating, ink and complex, asphalt modifier and polyene as rubber
The modifying agent of hydrocarbon.
And above-mentioned electric conductor 301 includes at least one of gold, silver, copper, aluminium, nickel, graphite, these metals are respectively provided with well
Electric conductivity.By the ascending sequence of resistivity, silver, copper, gold, aluminium, nickel, graphite are followed successively by.
Alternatively, above-mentioned electric conductor 301 includes at least one of conductive particle, conductive fiber, conducting strip.Due to glue-line
The thickness of matrix 300 is micron order, is visible when the particle diameter of electric conductor 301 is in micron order or nanoscale, can use by hand
Or electric conductor 301 is carried out individual layer tiling or multiple-level stack by mechanical system, now electric conductor 301 can be good in glue-line matrix
It is distributed in 300, and advantageously forms the flat surface of glue-line matrix 300.Because compared with conductive particle, conductive fiber is in glue
It is not easy to reunite in the glue-line matrix 300 of shape, and a large amount of the disorderly arranged of conductive fiber can form network structure, realize each
Conduction on direction, therefore optional electric conductor 301 is conductive fiber.In addition, also optional electric conductor 301 is conducting strip, so set
Meter is not only convenient for conducting resinl 30 and processed, and the conducting strip can also play a part of integrated support to conducting resinl 30.
Improved as one kind to the application conducting resinl 30, as shown in figure 5, conducting resinl 30 includes two layers of glue-line matrix 300
And the conductive substrate 302 between glue-line matrix 300, the surface of conductive substrate 302 can be burnishing surface, or non-
Burnishing surface.Its structure can be it is uninterrupted overall, can also internally or surface has hole or gap.Conductive substrate 302
Shape and area are identical with glue-line matrix 300, and conductive substrate 302 is extended in glue-line matrix 300, can further be increased
The electric conductivity of the conducting resinl 30, and integrated support effect is played to conducting resinl 30.
Wherein, the conductive material of the conductive substrate 302 can select gold, silver, copper, aluminium, nickel, golden oxide, silver oxide,
At least one of Cu oxide, aluminum oxide, nickel oxide, graphene and graphite, it can be selected according to the type of pole piece
Material.Specifically, when pole piece is anode strip, these foregoing materials may be incorporated for making conductive substrate 302；When pole piece is negative electrode
During piece, conductive substrate 302 is suitably using materials such as graphite or graphenes.
In addition, present invention also provides a kind of battery core, it includes the pole piece of any of the above-described embodiment, it is necessary to illustrate,
Encapsulant 40 is may be provided with the lug 20 of the pole piece, the encapsulant 40 can be tightly connected with the encapsulating shell of battery core.
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (10)
- A kind of 1. pole piece, it is characterised in that including pole piece body, lug and conducting resinl,The pole piece body includes collector and the active material layer being arranged on the collector, is set on the collector There is lug connecting portion, the lug connecting portion is not provided with the active material layer,The lug connecting portion includes the first adhesion zone and the first weld zone, and the lug includes the second adhesion zone and the second welding Area, first adhesion zone are fixed with second adhesion zone by the conductive adhesive, first weld zone and second Weld zone is welded and fixed.
- 2. pole piece according to claim 1, it is characterised in that second weld zone be provided with it is multiple, multiple described Two weld zones are arranged at intervals, and are provided with second adhesion zone between two neighboring second weld zone.
- 3. pole piece according to claim 2, it is characterised in that length direction of each second weld zone along the lug It is arranged at intervals.
- 4. pole piece according to claim 3, it is characterised in that each second weld zone is elongated, and each described second The bearing of trend of weld zone is the width of the lug.
- 5. pole piece according to claim 1, it is characterised in thatThe thickness of the conducting resinl is less than 100 microns.
- 6. pole piece according to claim 1, it is characterised in that the conducting resinl includes glue-line matrix and electric conductor, described Electric conductor is dispersed in the glue-line matrix, mass percent of the electric conductor in the glue-line matrix be 10%~ 30%.
- 7. pole piece according to claim 6, it is characterised in that the glue-line matrix includes silicon rubber, polyurethane rubber, chlorine At least one of buna, PUR, tackifying resin, the electric conductor are included in gold, silver, copper, aluminium, nickel, graphite at least It is a kind of.
- 8. pole piece according to claim 6, it is characterised in thatThe electric conductor includes at least one of conductive particle, conductive fiber, conducting strip.
- 9. pole piece according to claim 6, it is characterised in thatThe conducting resinl includes two layers of glue-line matrix and the conductive substrate between the glue-line matrix.
- 10. a kind of battery core, it is characterised in that including the pole piece any one of the claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720827888.5U CN207009539U (en) | 2017-07-10 | 2017-07-10 | Pole piece and battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720827888.5U CN207009539U (en) | 2017-07-10 | 2017-07-10 | Pole piece and battery core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207009539U true CN207009539U (en) | 2018-02-13 |
Family
ID=61452098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720827888.5U Active CN207009539U (en) | 2017-07-10 | 2017-07-10 | Pole piece and battery core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207009539U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281609A (en) * | 2018-03-27 | 2018-07-13 | 横店集团东磁股份有限公司 | A kind of anode pole piece with lug, preparation method and the lithium ion battery comprising the anode pole piece |
| CN108531118A (en) * | 2018-03-29 | 2018-09-14 | 深圳瑞隆新能源科技有限公司 | A kind of conduction glue caking agent and preparation method thereof, soft-package battery plate lug connecting method |
| CN111712946A (en) * | 2018-06-20 | 2020-09-25 | 株式会社Lg化学 | Electrode assembly having improved connection structure between electrode tab and current collector and method of manufacturing the same |
| WO2020258860A1 (en) * | 2019-06-28 | 2020-12-30 | 宁德时代新能源科技股份有限公司 | Electrode sheet, electrochemical device and device thereof |
| CN112687832A (en) * | 2020-12-24 | 2021-04-20 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
| CN113097655A (en) * | 2021-05-10 | 2021-07-09 | 厦门海辰新能源科技有限公司 | Pole piece, electric core subassembly and battery |
| CN113228405A (en) * | 2018-12-24 | 2021-08-06 | I-Ten公司 | Contact unit for electronic or electrochemical device |
| CN114447530A (en) * | 2022-04-08 | 2022-05-06 | 宁德新能源科技有限公司 | Electrochemical device and electronic apparatus |
| CN115832632A (en) * | 2022-11-03 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Pole piece, electric core, battery and electric equipment |
| CN117239058A (en) * | 2023-11-13 | 2023-12-15 | 珠海冠宇电池股份有限公司 | Pole piece, battery cell and battery |
-
2017
- 2017-07-10 CN CN201720827888.5U patent/CN207009539U/en active Active
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108281609A (en) * | 2018-03-27 | 2018-07-13 | 横店集团东磁股份有限公司 | A kind of anode pole piece with lug, preparation method and the lithium ion battery comprising the anode pole piece |
| CN108281609B (en) * | 2018-03-27 | 2023-07-28 | 横店集团东磁股份有限公司 | Positive electrode plate with tab, preparation method thereof and lithium ion battery comprising positive electrode plate |
| CN108531118A (en) * | 2018-03-29 | 2018-09-14 | 深圳瑞隆新能源科技有限公司 | A kind of conduction glue caking agent and preparation method thereof, soft-package battery plate lug connecting method |
| CN111712946A (en) * | 2018-06-20 | 2020-09-25 | 株式会社Lg化学 | Electrode assembly having improved connection structure between electrode tab and current collector and method of manufacturing the same |
| US12015177B2 (en) | 2018-06-20 | 2024-06-18 | Lg Energy Solution, Ltd. | Electrode assembly with improved connection between current collector and electrode tab and method of manufacturing the same |
| EP3739672A4 (en) * | 2018-06-20 | 2021-04-21 | Lg Chem, Ltd. | Electrode assembly having improved connection structure between electrode tab and current collector and method for manufacturing same |
| CN113228405A (en) * | 2018-12-24 | 2021-08-06 | I-Ten公司 | Contact unit for electronic or electrochemical device |
| WO2020258860A1 (en) * | 2019-06-28 | 2020-12-30 | 宁德时代新能源科技股份有限公司 | Electrode sheet, electrochemical device and device thereof |
| CN112687832B (en) * | 2020-12-24 | 2022-05-17 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
| CN112687832A (en) * | 2020-12-24 | 2021-04-20 | 宁德新能源科技有限公司 | Battery cell and power utilization device |
| CN113097655A (en) * | 2021-05-10 | 2021-07-09 | 厦门海辰新能源科技有限公司 | Pole piece, electric core subassembly and battery |
| CN114447530A (en) * | 2022-04-08 | 2022-05-06 | 宁德新能源科技有限公司 | Electrochemical device and electronic apparatus |
| CN115832632A (en) * | 2022-11-03 | 2023-03-21 | 宁德时代新能源科技股份有限公司 | Pole piece, electric core, battery and electric equipment |
| CN117239058A (en) * | 2023-11-13 | 2023-12-15 | 珠海冠宇电池股份有限公司 | Pole piece, battery cell and battery |
| CN117239058B (en) * | 2023-11-13 | 2024-03-01 | 珠海冠宇电池股份有限公司 | Pole piece, battery cell and battery |
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