CN207732007U - Cathode pole piece and lithium ion battery - Google Patents
Cathode pole piece and lithium ion battery Download PDFInfo
- Publication number
- CN207732007U CN207732007U CN201721367111.1U CN201721367111U CN207732007U CN 207732007 U CN207732007 U CN 207732007U CN 201721367111 U CN201721367111 U CN 201721367111U CN 207732007 U CN207732007 U CN 207732007U
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- collector
- pole piece
- pit
- cathode pole
- hole
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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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Abstract
This application provides a kind of cathode pole piece, which includes：The surface of collector, collector is provided with sunk structure, and sunk structure includes the through-hole through collector.A kind of lithium ion battery is also provided.The application's is designed to provide a kind of cathode pole piece and lithium ion battery that can be improved battery and recycle reliability and rate discharge characteristic for a long time.
Description
Technical field
This application involves field of batteries, more particularly to a kind of negative pole piece of battery and lithium ion battery.
Background technology
Since collection liquid surface is flat surface, the contact area deficiency of diaphragm and collector leads to diaphragm and collector
Resistance is larger when contact, so that the internal resistance of entire battery is difficult to decrease, causes big multiplying power discharging property bad.In addition, by
It is relatively low in the cohesive force of diaphragm and collector, cause the presence due to swelling stress during charge and discharge cycles that diaphragm is made to bond
Power weakens, and when battery core is by external mechanical damage, diaphragm is easy to fall off from collector to cause battery short circuit.
Utility model content
For problem present in the relevant technologies, the application's is designed to provide one kind and can improve battery and recycle for a long time
The negative pole piece of battery and lithium ion battery of reliability and rate discharge characteristic.
To achieve the above object, this application provides a kind of cathode pole pieces, including：Collector, the surface setting of collector
It includes the through-hole through collector to have sunk structure, sunk structure.
According to an embodiment of the present application, collector includes the first side and the second side relative to each other, sunk structure include by
The pit that first side extends towards the second side.
According to an embodiment of the present application, pit includes at least part shape multiple pits different from each other.
According to an embodiment of the present application, there is bonding agent in through-hole or pit.
According to an embodiment of the present application, there is copper particle in through-hole or pit.
According to an embodiment of the present application, there is negative electrode active material in through-hole or pit.
According to an embodiment of the present application, the maximum width of through-hole or pit is between 200nm-50 μm.
According to an embodiment of the present application, the thickness of collector is between 3 μm -15 μm.
According to an embodiment of the present application, the porosity of collector is between 1%-35%.
According to another embodiment of the application, a kind of lithium ion battery is also provided, lithium ion battery includes anode pole piece
And the cathode pole piece described in any of the above embodiment.
The advantageous effects of the application are：
In this application, by the way that sunk structure is arranged on the surface of collector, to increase between cathode membrane and collector
Contact area, promote cathode membrane adhesive force on a current collector, solve battery by long-term charge and discharge cycles and by
The problem of being easy to fall off from collector to cathode membrane when external mechanical damage, improves the reliability that battery recycles for a long time,
The charge transfer efficiency between cathode membrane and collector is improved simultaneously, reduces the internal resistance of cell, and then promote multiplying power discharging
Characteristic.
Description of the drawings
Fig. 1 is the schematic surface of collector.
Fig. 2 is the schematic cross-section of collector.
Fig. 3 is the electron microscope of afflux body section.
Fig. 4 is the electron microscope of afflux body section.
Fig. 5 is the electron microscope of afflux body section.
Specific implementation mode
Below with reference to attached drawing, embodiments herein is described in detail.
With reference to figure 1, this application provides a kind of negative pole piece of battery, negative pole piece of battery includes that collector and setting exist
Cathode membrane on collector 2 is provided with sunk structure 4 on the surface of collector 2.It should be appreciated that the setting of sunk structure 4 is collecting
On the surface of fluid 2, when cathode membrane is contacted with collector 2, cathode membrane can enter in sunk structure 4, and then increase
Bond area between cathode membrane and collector 2 so that cathode membrane is stronger is fixed on collector 2.
That is, by the way that sunk structure 4 is arranged on the surface of collector 2, to increase between cathode membrane and collector 2
Contact area, and by coating, after roll process, the composition material of diaphragm can enter the sunk structure of collector
In, and then adhesive force of the cathode membrane on collector 2 is promoted, battery is solved by long-term charge and discharge cycles and by outer
The problem of cathode membrane is easy to fall off from collector 2 when portion's mechanical damage, improves the reliability that battery recycles for a long time, simultaneously
The charge transfer efficiency between cathode membrane and collector 2 is improved, reduces the internal resistance of cell, and then it is special to promote multiplying power discharging
Property.
Referring to figs. 2 to Fig. 5, according to an embodiment of the present application, collector 2 includes the first side 6 opposite to each other and the second side
8, sunk structure includes the pit 10 extended towards the second side 8 by the first side 6.According to an embodiment of the present application, sunk structure is also
It include the pit 12 extended towards the first side 6 by the second side 8.That is, being all provided in the first side 6 of collector 2 and the second side 8
There is sunk structure.It should be understood, however, that for the caking property for improving between cathode membrane and collector 2, then at least in afflux
The surface of body, that is, the first side 6 as described above and the second side 8 are equipped with sunk structure.
Referring to figs. 2 to Fig. 5, according to an embodiment of the present application, sunk structure 4 further includes running through the first side 6 and the second side 8
Through-hole 14.In other words, the sunk structure on 6 surface of the first side extends towards 8 surface of the second side and extends to 8 table of the second side
Face, and form perforative hole；In other words, sunk structure on 8 surface of the second side extends towards 6 surface of the first side and extends to the
6 surface of side, and form perforative hole.
With reference to figure 1, according to an embodiment of the present application, pit 10 includes different from each other multiple recessed of at least part shape
Hole, and pit 12 includes at least part shape multiple pits different from each other.That is, 8 table of the first side 6 and the second side
Mask there are many pit of different shapes, and the shape of each pit can part it is identical or entirely different.Certainly should
Understand, the shape of each pit can also be identical.
According to an embodiment of the present application, have bonding agent in pit 10, pit 12 and through-hole 14, pit 10, pit 12 with
And have bonding agent that can make cathode membrane stronger attachment on collector 2 in through-hole 14, to solve battery by long-term
Charge and discharge cycles and cathode membrane easy the problem of falling off from collector 2 when by external mechanical damage, therefore can
Effectively improve the reliability that battery recycles for a long time.Optionally, bonding agent can be organic bonding agent, such as polyvinylidene fluoride
Alkene, butadiene-styrene rubber etc..
According to an embodiment of the present application, there is copper particle in pit 10, pit 12 and through-hole 14, that is to say, that pit 10,
Pit 12 and through-hole 14 are formed with the oxide particle etc. of copper particle or cupric in forming process.
According to an embodiment of the present application, have in pit 10, pit 12 and through-hole 14 and contain negative electrode active material, that is,
Say that negative electrode active material can be pressed into cold pressing process in pit 10, pit 12 and through-hole 14.Optionally, cathode is lived
Property substance can be natural graphite, artificial graphite, carbonaceous mesophase spherules (MCMB), soft carbon, hard carbon, mesophase carbon fiber, silicon, silicon
Alloy, tin, tin alloy etc..
According to an embodiment of the present application, the thickness of collector is between 3 μm -15 μm.
According to an embodiment of the present application, the porosity of collector is between 1%-35%.
With reference to figure 3 to Fig. 5, according to an embodiment of the present application, the maximum width of pit 10, pit 12 and through-hole 14 exists
Between 200nm-50 μm.
According to another embodiment of the application, a kind of lithium ion battery is also provided, lithium ion battery includes anode pole piece
And the negative pole piece of battery described in any of the above embodiment.
The preferred embodiment that these are only the application, is not intended to limit this application, for those skilled in the art
For member, the application can have various modifications and variations.Any modification made by within the spirit and principles of this application,
Equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (9)
1. a kind of cathode pole piece, including：
Collector, the collector include the first side and the second side relative to each other；
The surface of the collector is provided with sunk structure, the sunk structure include through the collector through-hole and
The pit extended towards the second side by first side.
2. cathode pole piece according to claim 1, wherein the pit includes different from each other more of at least part shape
A pit.
3. cathode pole piece according to claim 1 or 2, wherein have bonding agent in the through-hole or the pit.
4. cathode pole piece according to claim 1 or 2, wherein have copper particle in the through-hole or the pit.
5. cathode pole piece according to claim 1 or 2, wherein have negative electrode active material in the through-hole or the pit.
6. cathode pole piece according to claim 1 or 2, wherein the maximum width of the through-hole or the pit exists
Between 200nm-50 μm.
7. cathode pole piece according to claim 1, wherein the thickness of the collector is between 3 μm -15 μm.
8. cathode pole piece according to claim 1, wherein the porosity of the collector is between 1%-35%.
9. a kind of lithium ion battery, including cathode pole piece according to any one of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721367111.1U CN207732007U (en) | 2017-10-23 | 2017-10-23 | Cathode pole piece and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721367111.1U CN207732007U (en) | 2017-10-23 | 2017-10-23 | Cathode pole piece and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207732007U true CN207732007U (en) | 2018-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721367111.1U Active CN207732007U (en) | 2017-10-23 | 2017-10-23 | Cathode pole piece and lithium ion battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN207732007U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063860A (en) * | 2019-12-19 | 2020-04-24 | 深圳市倍特力电池有限公司 | Electrode plate, preparation method thereof and battery |
| CN111916669A (en) * | 2020-07-30 | 2020-11-10 | 内蒙古凯金新能源科技有限公司 | Carbon cathode for lithium ion television and preparation method thereof |
| WO2023221606A1 (en) * | 2022-05-20 | 2023-11-23 | 宁德时代新能源科技股份有限公司 | Current collector, electrode sheet, electrode assembly, battery cell, battery and electric apparatus |
| WO2024065764A1 (en) * | 2022-09-30 | 2024-04-04 | 宁德时代新能源科技股份有限公司 | Negative electrode sheet and preparation method therefor, and secondary battery and electric device |
-
2017
- 2017-10-23 CN CN201721367111.1U patent/CN207732007U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111063860A (en) * | 2019-12-19 | 2020-04-24 | 深圳市倍特力电池有限公司 | Electrode plate, preparation method thereof and battery |
| CN111916669A (en) * | 2020-07-30 | 2020-11-10 | 内蒙古凯金新能源科技有限公司 | Carbon cathode for lithium ion television and preparation method thereof |
| WO2023221606A1 (en) * | 2022-05-20 | 2023-11-23 | 宁德时代新能源科技股份有限公司 | Current collector, electrode sheet, electrode assembly, battery cell, battery and electric apparatus |
| WO2024065764A1 (en) * | 2022-09-30 | 2024-04-04 | 宁德时代新能源科技股份有限公司 | Negative electrode sheet and preparation method therefor, and secondary battery and electric device |
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