CN208806303U - Collector and the anode pole piece using its preparation, battery core - Google Patents
Collector and the anode pole piece using its preparation, battery core Download PDFInfo
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- CN208806303U CN208806303U CN201821228000.7U CN201821228000U CN208806303U CN 208806303 U CN208806303 U CN 208806303U CN 201821228000 U CN201821228000 U CN 201821228000U CN 208806303 U CN208806303 U CN 208806303U
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- porous film
- polymer porous
- collector
- conductive mesh
- grid regions
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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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- 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
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- Cell Electrode Carriers And Collectors (AREA)
Abstract
The utility model discloses a kind of collectors, including conductive mesh, polymer porous film, the transition region of conductive mesh is located at one group of relative side of grid regions and continuous along side, tab area is located at the outer side edges of transition region and is connected, the upper and lower surface of conductive mesh is attached with polymer porous film respectively, polymer porous film grid coverage area, transition strips area, the hole of polymer porous film correspond to the line on grid regions；Also disclose the anode pole piece prepared using the collector, on the outer surface of collector, it is sequentially coated with the conductive coating at least corresponding to cover aggregation object perforated membrane, positive electrode material layer from bottom to top, conductive coating is packed into the hole of polymer porous film and reaches the line on grid regions.The utility model advantage: current collector structure intensity, conveyance capacity, electric conductivity, and the adhesiveness with positive electrode are improved；The burr short circuit probability that collector is also easy to produce on anode pole piece when reducing abuse.
Description
Technical field
The utility model relates to the collectors in lithium ion battery, especially lithium ion battery, and use the afflux system
Standby anode pole piece, battery core.
Background technique
Use scope is more and more wider in daily life for lithium ion battery, especially obtains in consumer and electric car field
Arrive extensive popularization and development, and the also concern by more people of the security performance of lithium ion battery.
Under some abuse conditions, for example during extruding, needle thorn, shock etc., by external force, anode pole piece can occur
Rupture, since anode pole piece includes collector and positive electrode active materials two parts, the ductility of the two is had differences, therefore afflux
Body is exposed from anode pole piece, and then pierces through isolation film and cathode generation short circuit, will lead to battery core failure.Existing collector
Mostly aluminum foil current collector, part improve the battery core of design using graphite collector, with metallic or surface evaporated metal layer
Polymer collector etc., existing defect have: 1, graphite collector, polymer collector electric conductivity are too poor, are not able to satisfy electricity
Core use demand；2, the problems such as polymer collector, the poor adhesion of active material, Yi Fasheng is dropped off；3, graphite collector adds
Work performance is poor, there is the problems such as being easy disconnected band；4, aluminum foil current collector, safe effect are poor.
Utility model content
Purpose of utility model: in view of the above-mentioned problems, one of the purpose of this utility model is to provide a kind of improvement lithium-ion electric
The collector of pond security performance, the another object of the utility model be to provide a kind of anode pole piece prepared using the collector,
Battery core.
Technical solution: a kind of collector, including conductive mesh, polymer porous film, the conductive mesh include grid regions, transition
Area, tab area, the transition region are located at one group of relative side of the grid regions and, the tab position continuous along side
In the transition region outer side edges and be connected, the upper and lower surface of the conductive mesh is attached with the polymer porous film, institute respectively
It states polymer porous film and covers the grid regions, transition region, the hole of the polymer porous film corresponds on the grid regions
Line.
Further, the polymer porous film is monofilm, is pet layer, PP layer, PE layers of one of which, described to gather
The surface hot pressing for closing object perforated membrane and the conductive mesh is adhered to.
Further, the polymer porous film is the duplicature formed by base layer and glue-line, the base layer PET
Layer, PP layer, PE layers of one of which, the glue-line are the one of which of HMA layers, SIS layer, and the polymer porous film passes through institute
The surface bonding for stating glue-line and the conductive mesh is adhered to.
Further, when polymer porous film is above-mentioned duplicature, positioned at two of the upper and lower surface of the conductive mesh
Hole on the polymer porous film is opposite up and down.A certain hole on the polymer porous film of conductive mesh upper surface,
Line on grid regions, the connection of a certain hole on the polymer porous film of conductive mesh lower surface, are led by conductive coating
It is logical to form electrical connection, when preventing the glue-line of polymer porous film thicker, glue-line by with the line on the grid regions of glue-line bonding part
It circumferentially coats and leads to conductive failure, even if glue-line will circumferentially be coated with the line on the grid regions of glue-line bonding part at this time,
It can be connected to form electrical connection with the line on grid regions by the conductive coating in opposite hole.
Further, the thickness in the tab area is greater than the thickness of the transition region, and the thickness of the transition region is greater than institute
State the thickness of grid regions.To guarantee the conveyance capacity and welding performance of collector.
Optimal, the conductive mesh is aluminium net, the one of which of nickel screen, graphite network.
Further, the conductive mesh roll-forming.
Further, the shape of a mesh of the grid regions is diamond shape, rectangular.
A kind of anode pole piece prepared using above-mentioned collector, on the outer surface of the collector, from bottom to top
It is sequentially coated with conductive coating, positive electrode material layer, and at least corresponding covering polymer porous film, the conductive coating filling
Enter in the hole of the polymer porous film and reaches the line on the grid regions.
A kind of battery core includes the above-mentioned anode pole piece being prepared.
The utility model has the advantages that compared with prior art, the utility model has the advantages that: battery core is improved under mechanical abuse condition
Security performance, current collector structure intensity increases, and conveyance capacity and welding performance are promoted, especially suitable for discharge-rate require compared with
The problems such as high battery core improves collector processing performance, and band is resolved in reduction；Pass through polymer porous film and conductive coating knot
It closes, improves the electric conductivity of collector and the adhesion property with positive electrode, further improve conductive capability and conduction is equal
Even property reduces production process positive electrode and drops off problem；Collect on anode pole piece when reducing abuse by polymer porous film
The burr short circuit probability that fluid is also easy to produce.
Detailed description of the invention
Fig. 1 is the conductive mesh main view of embodiment 1；
Fig. 2 is the A-A cross-sectional view of Fig. 1；
Fig. 3 is the collector main view of embodiment 1；
Fig. 4 is the B-B cross-section end view of Fig. 3；
Fig. 5 is the anode pole piece cross-sectional view of embodiment 1.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the utility model is furtherd elucidate, these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.
Embodiment 1
A kind of collector, as shown in attached drawing 1~4, including conductive mesh 1, polymer porous film 2.
As shown in attached drawing 1,2, conductive mesh 1 includes grid regions 11, transition region 12, tab area 13, and transition region 12 is located at
One group of relative side 14,15 of grid regions 11, transition region 12 be respectively along the continuous strip of side 14,15, transition region 12
Its relative side of side that outer side edges, i.e. transition region 12 are connected with grid regions 11, is connected with tab area 13, grid regions 11, transition
Area 12, tab area 13 thickness successively increase.The material of conductive mesh 1 is the one of which of aluminium, nickel, graphite etc., by being rolled into
Type is made, and 16 shape of mesh on grid regions 11 is diamond shape, rectangular etc..
As shown in attached drawing 3,4, the upper and lower surface of conductive mesh 1 is attached with polymer porous film 2, equal grid coverage area respectively
11, transition region 12, the hole 21 of polymer porous film 2 correspond to the line 17 on grid regions 11, i.e. line on grid regions 11
17 fall at hole 21, and line 17 can be the single line part for constituting grid regions 11, are also possible to constitute the intersection of grid regions 11
Part.
The surface of polymer porous film 2 and conductive mesh 1 is adhered to by hot pressing, and polymer porous film 2 is monofilm, material at this time
Matter is the one of which of PET, PP, PE etc..
Hole on the polymer porous film of the upper and lower surface of conductive mesh can be completely opposite, part phase up and down
To, it is completely not opposite.
Conductive mesh guarantee collector electric conductivity, grid regions, transition region, tab area thickness successively increase, it is ensured that
The conveyance capacity and welding performance of collector, the battery core more demanding especially suitable for discharge-rate, polymer porous film guarantee
The structural strength and processing performance of collector.When abuse condition occurs, conductive mesh is coated by polymer porous film, conductive mesh
It is not easy exposed short circuit, even if short circuit occurs, the line on the grid of conductive mesh can also overload rapidly fusing, and battery core is avoided to lose
Effect.
A kind of anode pole piece prepared using above-mentioned collector, as shown in Fig. 5, in the outer surface up and down of collector
On, it is sequentially coated with conductive coating 3, positive electrode material layer 4 from bottom to top, at least cover aggregation object perforated membrane 2 of conductive coating 3, and
Covering can be extended to the tab area 13 of conductive mesh 1, positive electrode material layer 4 at least corresponds to cover aggregation object perforated membrane, conductive coating 3
It is filled into the hole of polymer porous film 2 and reaches the line 17 on grid regions 11.
The material of conductive coating 3 is the mixture of conductive charcoal and binder, and conductive charcoal is superconduction carbon black, acetylene black, graphite
Deng one of which, the one of which of binder PVDF, SBR etc..
The effect of conductive coating is to increase the caking property and electric conductivity of collector and positive electrode material layer, and conductive coating covering is poly-
After closing object perforated membrane and being filled into its hole, conducting is contacted with the line on the grid regions of conductive mesh and forms electrical connection, thus
Positive electrode material layer and conductive mesh are formed into electrical connection, improve conductive capability and conductivity uniformity.
A kind of battery core includes the above-mentioned anode pole piece being prepared.
Embodiment 2
Substantially the same manner as Example 1, difference is, the surface of polymer porous film and conductive mesh is adhered to by bonding, this
When polymer porous film be the duplicature formed by base layer and glue-line, the material of base layer is wherein the one of PET, PP, PE etc.
Kind, the material of glue-line is the one of which of HMA, SIS etc., and polymer porous film is bonded attached by the surface of glue-line and conductive mesh
?.
Hole on the polymer porous film of the upper and lower surface of conductive mesh is located at table in conductive mesh up and down relatively
A certain hole on the polymer porous film in face, the line on grid regions, on the polymer porous film of conductive mesh lower surface
A certain hole connection, be connected to form electrical connection by conductive coating.On the polymer porous film of conductive mesh upper surface
A certain hole and a certain hole being located on the polymer porous film of conductive mesh lower surface are opposite up and down, can be center and correspond to,
It is also possible to center deviation, can be up and down completely relatively, it is opposite to be also possible to part.The structure can prevent polyalcohol stephanoporate
When the glue-line of film is thicker, glue-line will circumferentially coat with the line on the grid regions of glue-line bonding part and lead to conductive failure, at this time
Even if glue-line will circumferentially be coated with the line on the grid regions of glue-line bonding part, the conductive coating in opposite hole can also be passed through
It is connected to form electrical connection with the line on grid regions.
Claims (10)
1. a kind of collector, it is characterised in that: including conductive mesh, polymer porous film, the conductive mesh includes grid regions, transition
Area, tab area, the transition region are located at one group of relative side of the grid regions and, the tab position continuous along side
In the transition region outer side edges and be connected, the upper and lower surface of the conductive mesh is attached with the polymer porous film, institute respectively
It states polymer porous film and covers the grid regions, transition region, the hole of the polymer porous film corresponds on the grid regions
Line.
2. collector according to claim 1, it is characterised in that: the polymer porous film be monofilm, be pet layer,
The surface hot pressing of PP layers, PE layers of one of which, the polymer porous film and the conductive mesh is adhered to.
3. collector according to claim 1, it is characterised in that: the polymer porous film is by base layer and glue-line shape
At duplicature, the base layer is pet layer, PP layer, PE layers of one of which, the glue-line is HMA layers, SIS layer wherein
One kind, the polymer porous film is bonded by the surface of the glue-line and the conductive mesh to be adhered to.
4. collector according to claim 3, it is characterised in that: described in two of the upper and lower surface of the conductive mesh
Hole on polymer porous film is opposite up and down.
5. collector according to claim 1, it is characterised in that: the thickness in the tab area is greater than the thickness of the transition region
Degree, the thickness of the transition region are greater than the thickness of the grid regions.
6. collector according to claim 1, it is characterised in that: the conductive mesh be aluminium net, nickel screen, graphite network wherein
It is a kind of.
7. collector according to claim 1, it is characterised in that: the conductive mesh roll-forming.
8. collector according to claim 1, it is characterised in that: the shape of a mesh of the grid regions is diamond shape, rectangular.
9. a kind of anode pole piece using any collector preparation of claim 1~8, it is characterised in that: in the collection
On the outer surface of fluid, it is sequentially coated with conductive coating, positive electrode material layer, and at least corresponding covering polymerization from bottom to top
Object perforated membrane, the conductive coating are packed into the hole of the polymer porous film and reach the line on the grid regions.
10. a kind of battery core, it is characterised in that: include anode pole piece as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821228000.7U CN208806303U (en) | 2018-08-01 | 2018-08-01 | Collector and the anode pole piece using its preparation, battery core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821228000.7U CN208806303U (en) | 2018-08-01 | 2018-08-01 | Collector and the anode pole piece using its preparation, battery core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208806303U true CN208806303U (en) | 2019-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821228000.7U Active CN208806303U (en) | 2018-08-01 | 2018-08-01 | Collector and the anode pole piece using its preparation, battery core |
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| Country | Link |
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| CN (1) | CN208806303U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736016A (en) * | 2018-08-01 | 2018-11-02 | 力信（江苏）能源科技有限责任公司 | Collector and the anode pole piece using its preparation, battery core |
| CN114665100A (en) * | 2022-02-24 | 2022-06-24 | 上海兰钧新能源科技有限公司 | Aluminum foil for battery and preparation method thereof |
-
2018
- 2018-08-01 CN CN201821228000.7U patent/CN208806303U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108736016A (en) * | 2018-08-01 | 2018-11-02 | 力信（江苏）能源科技有限责任公司 | Collector and the anode pole piece using its preparation, battery core |
| CN108736016B (en) * | 2018-08-01 | 2023-11-24 | 利信(江苏)能源科技有限责任公司 | Current collector and positive electrode plate and battery core prepared by using same |
| CN114665100A (en) * | 2022-02-24 | 2022-06-24 | 上海兰钧新能源科技有限公司 | Aluminum foil for battery and preparation method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 2 Dagang Dashan Road, Zhenjiang New District, Zhenjiang City, Jiangsu Province Patentee after: Lixin (Jiangsu) Energy Technology Co.,Ltd. Address before: No.2, Dagang Dashan Road, New District, Zhenjiang City, Jiangsu Province Patentee before: ETRUST POWER Group Ltd. |
|
| CP03 | Change of name, title or address |