CN105322130A - Electrode sheet and manufacturing method thereof - Google Patents
Electrode sheet and manufacturing method thereof Download PDFInfo
- Publication number
- CN105322130A CN105322130A CN201410362436.5A CN201410362436A CN105322130A CN 105322130 A CN105322130 A CN 105322130A CN 201410362436 A CN201410362436 A CN 201410362436A CN 105322130 A CN105322130 A CN 105322130A
- Authority
- CN
- China
- Prior art keywords
- current collector
- collector layers
- aperture
- adjacent different
- row
- 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
-
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The present invention provides an electrode sheet and a manufacturing method thereof. The electrode sheet comprises a current collector layer and a slurry layer, wherein the slurry layer is coated on the current collector layer, small through holes are distributed on the current collector layer. The electrode sheet is characterized in that the small through holes are arranged into the column parallel to the edge of the current collector layer and the row perpendicular to the edge of the current collector layer, and the centers of the four small through holes distributed on different adjacent three rows and different adjacent three columns are connected to form an equilateral quadrangle. With the technical scheme of the present invention, the uniformity of the slurry on the current collector layer is increased, the active material can be automatically balance through the small holes, the uniformity is improved, and the local excess charge and discharge is avoided so as to improve the safety performance; and the rate performance, the cycle life and the energy conversion efficiency of the battery are improved.
Description
Technical field
The invention discloses a kind of pole piece and manufacture method thereof of lithium ion battery.
Background technology
Lithium ion battery is that a kind of energy density is large, average output voltage is high, power output is large, and self discharge is little, memory-less effect, operating temperature range wide (being-20 DEG C ~ 60 DEG C), cycle performance is superior, can fast charging and discharging, and efficiency for charge-discharge is high, long service life, the green battery of environmentally safe.It is the round embedding of dependence lithium ion between positive and negative electrode, deintercalation completes the work of battery charging and discharging.
In order to improve the energy density of lithium ion battery further, by adopting thinner collector and barrier film, increase coat thickness under the prerequisite of proof strength, improve the content of active material in pole piece, improve pole piece compaction density, adopting more effective additive to improve the effective rate of utilization of active material.But, due to the current requirements at the higher level proposed battery performance, still the capacity and/or the multiplying power discharging property that improve secondary lithium battery is further needed, and from production technology, the two sides active matter coating keeping pole piece is wanted to make consistency more difficult, usually the phenomenon of two sides active matter coating became uneven is there is at all multiple locations of pole piece, the local of positive/negative plate is made to there is the energy that compares inconsistent, consequently there is difference to pole piece charge-discharge cycle in Local Phase, battery deep-cycle causes pole piece local first " to cave in ", and then whole battery is damaged in succession.Therefore, the performance improving pole piece is even more important.
Application number is the patent with the aluminium foil of through hole by name of CN201080027918.5, it is by Fe:5-80 weight ppm, Si:5-100 weight ppm, Cu:10-100 weight ppm and surplus: Al and inevitably impurity are formed, and (1) paper tinsel thickness is below 501m; (2) there is multiple through hole from paper tinsel surface to the back side; (3) this vertical through-via occupation rate c (%) with the aluminium foil of through hole and above-mentioned paper tinsel thickness t (μm) ratio " c/t] be more than 1.4.
This invented party lithium ion move, alleviate the conforming problem of pole piece to a certain extent, but this difficult problem can not be solved completely.
Summary of the invention
An object of the present invention is to provide a kind of pole piece, comprise current collector layers and pulp layer, described pulp layer is coated on described current collector layers, described current collector layers distributes the aperture run through, it is characterized in that, described aperture is arranged to the row on the row on the limit being parallel to current collector layers and the limit perpendicular to current collector layers, described four small hole center being distributed in three adjacent different rows different lines adjacent with three are connected to form equilateral quadrangle, and the pulp particle that described aperture makes diameter be selected from 0.05mm to 0.3mm is passed through.
The pulp particle that aperture makes diameter be selected from 0.05mm to 0.3mm is passed through, ensure that the active material in pulp layer can by penetrating aperture, be conducive to slurry being uniformly distributed in current collector layers, make up the defect because technique causes, the maximum pulp particle making diameter be selected from 0.3mm of aperture is passed through, excessive aperture is avoided to reduce the intensity of current collector layers, be distributed in three adjacent different rows and four small hole center of three adjacent different lines are connected to form equilateral quadrangle for slurry distribution and stressed considering, make current collector layers too much can not reduce intensity due to the existence of aperture.
As preferably, all aperture size in described current collector layers are consistent.
All aperture size in current collector layers are consistent, are conducive to the infiltration of electrode slurry and are uniformly distributed; Make current collector layers when being subject to pullling, dispersion tensile force, improves the intensity of current collector layers, the maximum tensile stress that especially can bear; Be convenient to processing and assembling.
As preferably, described aperture makes diameter be that the pulp particle of 0.1mm is passed through.
Li-ion electrode slurry viscosity is generally distributed between 1000 ~ 7000mPas, and the type slurry can not penetrate into collector another side by aperture on a current collector, and can ensure that slurry is uniformly distributed at collector one side, does not affect the coating of second; Meanwhile, collector distributes diameter is the aperture that the pulp particle of 0.1mm is passed through, affect the intensity of collector hardly.So just accomplish, when ensureing collector intensity, to be conducive to lithium ion and to have free passage, reduced DC internal resistance, improve battery performance.
As preferably, described in be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is selected from 0.3mm to 1mm.
Three adjacent different rows will be distributed in and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is selected from 0.3mm to 1mm, this feature defines the quantity of the aperture that current collector layers is arranged in unit are, improve the intensity of current collector layers to greatest extent, avoid it to break in assembling and use procedure, thus affect the serviceability of whole battery pack.
As preferably, described in be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is selected from 0.5mm to 0.6mm.
Three adjacent different rows will be distributed in and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is selected from 0.5mm to 0.6mm, negligible on the impact of current collector layers intensity, meet the intensity of the current collector layers of needs during coating far away.The aperture of this density that current collector layers distributes, the requirement to current collector layers tensile strength when still can ensure to be coated with, and the strong adhesion of slurry can be strengthened, meanwhile, be conducive to slurry and can be uniformly distributed in current collector layers, ensure coating uniform.
As preferably, many one of the little hole number of aperture number ratio (n+1)th row of described n-th row, few one of the little hole number of aperture number ratio n-th+2 row of the (n+1)th row, many one of the little hole number that the aperture number ratio m+1 that described m is capable is capable, few one of the little hole number that the aperture number ratio m+2 that m+1 is capable is capable, n≤1, m≤1.
Many one of the little hole number that on pole piece, the aperture number ratio (n+1)th of the n-th row arranges, few one of the little hole number that the (n+1)th aperture number ratio n-th+2 arranged arranges, forms the situation of row and another row cross arrangement; Many one of the little hole number that the aperture number ratio m+1 that m is capable is capable, few one of the little hole number that the aperture number ratio m+2 that m+1 is capable is capable, forms the situation of a line and another row cross arrangement, is conducive to keeping the quantity of aperture and the intensity of pole piece in unit are.
The invention also discloses a kind of method manufacturing above-mentioned pole piece:
Current collector layers one side punctures by the backer roll of step one, use band sharp projection;
Step 2, will after current collector layers turn-over use band sharp projection backer roll dislocation second time puncture, avoid the aperture repeated puncture to having been formed;
Step 3, by level and smooth backer roll by the two sides roll extrusion of current collector layer body, flatten and pierce through the burr of keyhole formation;
Step 4, respectively apply top electrode slurry equably on the two sides of current collector layers.
Two-sided for current collector layers puncture can be ensured the burr produced divides equally distribution on two sides, can not as one side puncture, one side is only had to produce burr, after the current collector layers after perforation is flattened, the burr backfin that puncture produces, in current collector layers, is avoided burr to expose barrier film, also can be ensured that the thickness of current collector layers is even, there is not the problem of positive and negative in current collector layers, reduce the difficulty of assembling after above-mentioned technique yet.
The invention also discloses a kind of lithium ion battery, it use the present invention's pole piece as above.
After using technical scheme provided by the invention, be conducive to lithium ion and shuttle back and forth, reduce DC internal resistance; Slurry is at current collector layers Adhesion enhancement, and slurry can also be permeated by aperture, adds the uniformity of current collector layers spreading mass, and active material also can pass through aperture automatic equalization, improves consistency, avoids local excessive discharge and recharge, thus improve security performance; Also can preserve a certain amount of slurry in aperture simultaneously, make the active material of unit are in current collector layers more, add the energy density of battery; Current collector layers outer surface after processing is uneven, adds the cementitiousness of active material, the internal resistance of battery unit is declined, and increases cycle life and energy conversion efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the current collector layers of a kind of execution mode disclosed by the invention;
Fig. 2 is the structural representation of the current collector layers of another kind of execution mode disclosed by the invention;
Fig. 3 is the structural representation of the current collector layers of another kind of execution mode disclosed by the invention;
Fig. 4 is the structural representation of the current collector layers of another kind of execution mode disclosed by the invention.
Execution mode
Embodiment 1
As shown in Figure 1, the present embodiment provides a kind of pole piece, comprise current collector layers and pulp layer, pulp layer is coated on described current collector layers, current collector layers distributes the aperture run through, aperture is arranged to the row on the row on the limit being parallel to current collector layers and the limit perpendicular to current collector layers, be distributed in three adjacent different rows and four small hole center of three adjacent different lines are connected to form equilateral quadrangle, aperture can make diameter be that the pulp particle of 0.1mm is passed through, be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is 0.5mm, the quadrangle that the center being distributed in the adjacent different apertures of four of two adjacent different rows is connected to form is be wider than long rectangle, and the little hole number often arranged is identical, often the little hole number of row is also identical.
Embodiment 2
As shown in Figure 1, the present embodiment provides a kind of pole piece, comprise current collector layers and pulp layer, pulp layer is coated on described current collector layers, current collector layers distributes the aperture run through, aperture is arranged to the row on the row on the limit being parallel to current collector layers and the limit perpendicular to current collector layers, be distributed in three adjacent different rows and four small hole center of three adjacent different lines are connected to form equilateral quadrangle, aperture can make diameter be that the pulp particle of 0.15mm is passed through, be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is 0.5mm, the quadrangle that the center being distributed in the adjacent different apertures of four of two adjacent different rows is connected to form is be wider than long rectangle
Embodiment 3
As shown in Figure 2, the present embodiment provides a kind of pole piece, comprise current collector layers and pulp layer, pulp layer is coated on described current collector layers, current collector layers distributes the aperture run through, aperture is arranged to the row on the row on the limit being parallel to current collector layers and the limit perpendicular to current collector layers, be distributed in three adjacent different rows and four small hole center of three adjacent different lines are connected to form equilateral quadrangle, aperture can make diameter be that the pulp particle of 0.1mm is passed through, be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is 0.5mm, the quadrangle that the center being distributed in the adjacent different apertures of four of two adjacent different rows is connected to form is the rectangle of growing up in wide.
Embodiment 4
As shown in Figure 2, the present embodiment provides a kind of pole piece, comprise current collector layers and pulp layer, pulp layer is coated on described current collector layers, current collector layers distributes the aperture run through, aperture is arranged to the row on the row on the limit being parallel to current collector layers and the limit perpendicular to current collector layers, be distributed in three adjacent different rows and four small hole center of three adjacent different lines are connected to form equilateral quadrangle, aperture can make diameter be that the pulp particle of 0.15mm is passed through, be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is 0.5mm, the quadrangle that the center being distributed in the adjacent different apertures of four of two adjacent different rows is connected to form is the rectangle of growing up in wide.
Embodiment 5
As shown in Figure 3, the present embodiment provides a kind of pole piece, comprise current collector layers and pulp layer, pulp layer is coated on described current collector layers, current collector layers distributes the aperture run through, aperture is arranged to the row on the row on the limit being parallel to current collector layers and the limit perpendicular to current collector layers, be distributed in three adjacent different rows and four small hole center of three adjacent different lines are connected to form equilateral quadrangle, aperture can make diameter be that the pulp particle of 0.1mm is passed through, be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is 0.5mm, the quadrangle that the center being distributed in the adjacent different apertures of four of two adjacent different rows is connected to form is square.
Embodiment 6
As shown in Figure 3, the present embodiment provides a kind of pole piece, comprise current collector layers and pulp layer, pulp layer is coated on described current collector layers, current collector layers distributes the aperture run through, aperture is arranged to the row on the row on the limit being parallel to current collector layers and the limit perpendicular to current collector layers, be distributed in three adjacent different rows and four small hole center of three adjacent different lines are connected to form equilateral quadrangle, aperture can make diameter be that the pulp particle of 0.15mm is passed through, be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is 0.5mm, the quadrangle that the center being distributed in the adjacent different apertures of four of two adjacent different rows is connected to form is square.
Embodiment 7
As shown in Figure 4, the present embodiment provides a kind of pole piece, comprise current collector layers and pulp layer, pulp layer is coated on described current collector layers, current collector layers distributes the aperture run through, aperture is arranged to the row on the row on the limit being parallel to current collector layers and the limit perpendicular to current collector layers, be distributed in three adjacent different rows and four small hole center of three adjacent different lines are connected to form equilateral quadrangle, aperture can make diameter be that the pulp particle of 0.1mm is passed through, be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is 0.5mm, the quadrangle that the center being distributed in the adjacent different apertures of four of two adjacent different rows is connected to form is equilateral quadrangle, many one of the little hole number of aperture number ratio (n+1)th row of the n-th row, few one of the little hole number of aperture number ratio n-th+2 row of the (n+1)th row, many one of the little hole number that the aperture number ratio m+1 that m is capable is capable, few one of the little hole number that the aperture number ratio m+2 that m+1 is capable is capable, n≤1, m≤1.
Embodiment 8
As shown in Figure 4, the present embodiment provides a kind of pole piece, comprise current collector layers and pulp layer, pulp layer is coated on described current collector layers, current collector layers distributes the aperture run through, aperture is arranged to the row on the row on the limit being parallel to current collector layers and the limit perpendicular to current collector layers, be distributed in three adjacent different rows and four small hole center of three adjacent different lines are connected to form equilateral quadrangle, aperture can make diameter be that the pulp particle of 0.15mm is passed through, be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is 0.5mm, the quadrangle that the center being distributed in the adjacent different apertures of four of two adjacent different rows is connected to form is equilateral quadrangle, many one of the little hole number of aperture number ratio (n+1)th row of the n-th row, few one of the little hole number of aperture number ratio n-th+2 row of the (n+1)th row, many one of the little hole number that the aperture number ratio m+1 that m is capable is capable, few one of the little hole number that the aperture number ratio m+2 that m+1 is capable is capable, n≤1, m≤1.
Embodiment 9
As shown in Figure 4, the present embodiment provides a kind of pole piece, comprise current collector layers and pulp layer, pulp layer is coated on described current collector layers, current collector layers distributes the aperture run through, aperture is arranged to the row on the row on the limit being parallel to current collector layers and the limit perpendicular to current collector layers, be distributed in three adjacent different rows and four small hole center of three adjacent different lines are connected to form equilateral quadrangle, aperture can make diameter be that the pulp particle of 0.1mm is passed through, be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is 0.6mm, the quadrangle that the center being distributed in the adjacent different apertures of four of two adjacent different rows is connected to form is equilateral quadrangle, many one of the little hole number of aperture number ratio (n+1)th row of the n-th row, few one of the little hole number of aperture number ratio n-th+2 row of the (n+1)th row, many one of the little hole number that the aperture number ratio m+1 that m is capable is capable, few one of the little hole number that the aperture number ratio m+2 that m+1 is capable is capable, n≤1, m≤1.
Embodiment 10
As shown in Figure 4, the present embodiment provides a kind of pole piece, comprise current collector layers and pulp layer, pulp layer is coated on described current collector layers, current collector layers distributes the aperture run through, aperture is arranged to the row on the row on the limit being parallel to current collector layers and the limit perpendicular to current collector layers, be distributed in three adjacent different rows and four small hole center of three adjacent different lines are connected to form equilateral quadrangle, aperture can make diameter be that the pulp particle of 0.15mm is passed through, be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is 0.6mm, the quadrangle that the center being distributed in the adjacent different apertures of four of two adjacent different rows is connected to form is equilateral quadrangle, many one of the little hole number of aperture number ratio (n+1)th row of the n-th row, few one of the little hole number of aperture number ratio n-th+2 row of the (n+1)th row, many one of the little hole number that the aperture number ratio m+1 that m is capable is capable, few one of the little hole number that the aperture number ratio m+2 that m+1 is capable is capable, n≤1, m≤1.
Embodiment 11
The present embodiment provides a kind of manufacture method of pole piece, comprises current collector layers and pulp layer, and described pulp layer is coated on described current collector layers, also comprises four steps:
Current collector layers one side punctures by the backer roll of step one, use band sharp projection;
Step 2, will after current collector layers turn-over use band sharp projection backer roll dislocation second time puncture, avoid the aperture repeated puncture to having been formed;
Step 3, by level and smooth backer roll by the roll extrusion of current collector layers two sides, flatten and pierce through the burr of keyhole formation;
Step 4, respectively apply top electrode slurry equably on the two sides of current collector layers.
Claims (7)
1. a pole piece, comprise current collector layers and pulp layer, described pulp layer is coated on described current collector layers, described current collector layers distributes the aperture run through, it is characterized in that, described aperture is arranged to the row on the row on the limit being parallel to current collector layers and the limit perpendicular to current collector layers, described in be distributed in three adjacent different rows and four small hole center of three adjacent different lines are connected to form equilateral quadrangle, the pulp particle that described aperture makes diameter be selected from 0.05mm to 0.3mm is passed through.
2. pole piece according to claim 1, is characterized in that: all aperture size in described current collector layers are consistent.
3. pole piece according to claim 2, is characterized in that: described aperture makes diameter be that the pulp particle of 0.1mm is passed through.
4. pole piece according to claim 3, is characterized in that: described in be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is selected from 0.3mm to 1mm.
5. pole piece according to claim 4, is characterized in that: described in be distributed in three adjacent different rows and the length of side that four small hole center of three adjacent different lines are connected to form equilateral quadrangle is selected from 0.5mm to 0.6mm.
6. according to the arbitrary described pole piece of claim 1 to 5, it is characterized in that: many one of the little hole number of aperture number ratio (n+1)th row of described n-th row, few one of the little hole number of aperture number ratio n-th+2 row of the (n+1)th row, many one of the little hole number that the aperture number ratio m+1 that described m is capable is capable, few one of the little hole number that the aperture number ratio m+2 that m+1 is capable is capable, n≤1, m≤1.
7. a manufacture method for the arbitrary described pole piece of claim 1 to 6, is characterized in that:
Current collector layers one side punctures by the backer roll of step one, use band sharp projection;
Step 2, will after current collector layers turn-over use band sharp projection backer roll dislocation second time puncture, avoid the aperture repeated puncture to having been formed;
Step 3, by level and smooth backer roll by the roll extrusion of current collector layers two sides, flatten and pierce through the burr of keyhole formation;
Step 4, respectively apply top electrode slurry equably on the two sides of current collector layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410362436.5A CN105322130A (en) | 2014-07-28 | 2014-07-28 | Electrode sheet and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410362436.5A CN105322130A (en) | 2014-07-28 | 2014-07-28 | Electrode sheet and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105322130A true CN105322130A (en) | 2016-02-10 |
Family
ID=55249099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410362436.5A Pending CN105322130A (en) | 2014-07-28 | 2014-07-28 | Electrode sheet and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105322130A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600673A (en) * | 2019-08-30 | 2019-12-20 | 长沙锂安能电子科技有限公司 | Manufacturing method and manufacturing equipment of double-sided coating integrated three-dimensional base material |
| CN112002873A (en) * | 2019-05-27 | 2020-11-27 | 万向一二三股份公司 | Pole piece with high bending strength of current collector |
| CN112838191A (en) * | 2021-01-08 | 2021-05-25 | 珠海冠宇电池股份有限公司 | Negative plate and lithium ion battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1870326A (en) * | 2006-03-30 | 2006-11-29 | 苏州星恒电源有限公司 | Non-aqueous solution electrochemical device polar plate and its manufacturing method |
| CN103165901A (en) * | 2011-12-15 | 2013-06-19 | 罗栋 | Pole piece substrate and pole piece of lithium battery, and preparation method thereof |
| CN203983398U (en) * | 2014-07-28 | 2014-12-03 | 微宏动力系统（湖州）有限公司 | Pole piece and use the lithium ion battery of this pole piece |
-
2014
- 2014-07-28 CN CN201410362436.5A patent/CN105322130A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1870326A (en) * | 2006-03-30 | 2006-11-29 | 苏州星恒电源有限公司 | Non-aqueous solution electrochemical device polar plate and its manufacturing method |
| CN103165901A (en) * | 2011-12-15 | 2013-06-19 | 罗栋 | Pole piece substrate and pole piece of lithium battery, and preparation method thereof |
| CN203983398U (en) * | 2014-07-28 | 2014-12-03 | 微宏动力系统（湖州）有限公司 | Pole piece and use the lithium ion battery of this pole piece |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112002873A (en) * | 2019-05-27 | 2020-11-27 | 万向一二三股份公司 | Pole piece with high bending strength of current collector |
| CN110600673A (en) * | 2019-08-30 | 2019-12-20 | 长沙锂安能电子科技有限公司 | Manufacturing method and manufacturing equipment of double-sided coating integrated three-dimensional base material |
| CN110600673B (en) * | 2019-08-30 | 2021-07-09 | 吴达红 | Manufacturing method and manufacturing equipment of double-sided coating integrated three-dimensional base material |
| CN112838191A (en) * | 2021-01-08 | 2021-05-25 | 珠海冠宇电池股份有限公司 | Negative plate and lithium ion battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108400284B (en) | Punched positive plate of lithium ion battery and preparation method thereof | |
| CN112750978B (en) | Pole piece and battery | |
| CN112542570B (en) | Silicon negative pole piece, preparation method thereof and lithium ion battery | |
| US20170263933A1 (en) | Positive electrode for lithium-ion secondary cell, and lithium-ion secondary cell | |
| CN111430723A (en) | Lithium-supplementing current collector, preparation method and application thereof, negative pole piece and lithium ion battery | |
| CN109980180B (en) | Negative pole piece and preparation method thereof, soft package lithium ion battery and preparation method thereof | |
| JP2013016800A (en) | Lithium plate, method for lithiation of electrode and energy storage device | |
| CN104752752B (en) | The preparation method of the naked battery core of lithium ion battery and the lithium ion battery containing the naked battery core | |
| CN106848272B (en) | Porous tin foil cathode, preparation method thereof and sodium ion secondary battery | |
| CN105322130A (en) | Electrode sheet and manufacturing method thereof | |
| CN111900329A (en) | Pole piece and preparation method and application thereof | |
| CN102214838A (en) | Lithium ion battery and preparation method thereof | |
| CN104882630B (en) | A kind of preparation method of the naked battery core of lithium ion battery and the lithium ion battery containing the naked battery core | |
| TW201320454A (en) | Metal foil with coating layer and method for producing same, secondary cell electrode and method for producing same, and lithium ion secondary cell | |
| CN114221045A (en) | Preparation method of porous carbon lithium-supplement negative electrode sheet lithium ion battery | |
| CN207504104U (en) | A kind of collector and the secondary cell using the collector | |
| CN211980812U (en) | Tool for coiling and embossing lithium battery pole piece | |
| CN211125821U (en) | High-performance three-dimensional precoating current collector | |
| CN203983398U (en) | Pole piece and use the lithium ion battery of this pole piece | |
| CN110676518A (en) | Method for preventing lithium precipitation of lithium ion battery cathode | |
| CN101894948B (en) | Method for preparing bag type metal hydride cathode of alkaline storage battery | |
| CN201699089U (en) | Lithium ion battery | |
| WO2016039264A1 (en) | Positive electrode for lithium-ion secondary cell, and lithium-ion secondary cell | |
| CN211125818U (en) | Battery made of three-dimensional precoated pole piece | |
| CN210200870U (en) | Lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into 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: 20160210 |