CN114203960A - Positive plate and battery - Google Patents
Positive plate and battery Download PDFInfo
- Publication number
- CN114203960A CN114203960A CN202111535422.5A CN202111535422A CN114203960A CN 114203960 A CN114203960 A CN 114203960A CN 202111535422 A CN202111535422 A CN 202111535422A CN 114203960 A CN114203960 A CN 114203960A
- Authority
- CN
- China
- Prior art keywords
- smear
- porous insulating
- positive
- positive electrode
- area
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a positive plate and a battery, wherein the battery comprises: the coating comprises a positive current collector, a first positive smear and a first porous insulating smear, wherein the first positive smear is coated on the surface of the positive current collector; the first porous insulating smear comprises a first area and a second area which are adjacent, wherein the first area covers the surface of the first positive electrode smear far away from the positive electrode current collector, and the second area of the first porous insulating smear covers the surface of the positive electrode current collector. According to the embodiment of the invention, the first porous insulating smear is used for replacing the gummed paper, so that the situation that the capacity of a part pasted by the gummed paper cannot be exerted is avoided while the battery is effectively prevented from being short-circuited due to burrs, and the energy density of the battery is improved.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a positive plate and a battery.
Background
At present, lithium ion batteries are widely applied to the fields of mobile terminals, new energy automobiles and the like, and consumers have higher demands on lithium ion batteries with higher energy density. The energy density of the current lithium ion battery is improved mainly from the aspects of positive and negative electrode active substances, positive and negative electrode current collectors, a battery structure and the like, so that the energy density is improved. However, in the prior art, in order to prevent burrs on the surfaces of the positive and negative electrode active materials from penetrating through the diaphragm to cause short circuit, different gummed papers are pasted on the surfaces of the positive and negative electrode active materials. The positive active material of the adhesive portion of the adhesive tape cannot exert its capacity, resulting in a low energy density of the lithium ion battery.
It is seen that the related art has a problem in that the energy density of the lithium ion battery is low.
Disclosure of Invention
The embodiment of the invention provides a positive plate and a battery, which aim to solve the problem that the energy density of a lithium ion battery in the prior art is low.
In order to achieve the above object, an embodiment of the present invention provides a positive electrode sheet, including: a positive electrode current collector, a first positive electrode smear and a first porous insulating smear on the first positive electrode smear, wherein,
the first positive smear is coated on the surface of the positive current collector;
the first porous insulating smear comprises a first area and a second area which are adjacent, wherein the first area covers the surface of the first positive electrode smear far away from the positive electrode current collector, and the second area of the first porous insulating smear covers the surface of the positive electrode current collector. As an alternative embodiment, the first or second porous insulating smear is provided as a porous electronic insulating smear.
As an alternative embodiment, the positive plate further comprises a second positive plate smear and a second porous insulating smear, wherein,
the first positive electrode smear is coated on the first surface of the positive electrode current collector, the second positive electrode smear is coated on the second surface of the positive electrode current collector, and the first surface and the second surface of the positive electrode current collector are opposite;
the first area of the second porous insulating smear is coated on the surface of the second positive electrode smear far away from the positive electrode current collector, the second area of the second porous insulating smear is coated on the second surface of the positive electrode current collector, and the first area and the second area of the second porous insulating smear are adjacent.
As an alternative embodiment, the porosity of the first porous insulating smear and/or the second porous insulating smear is 12-25%.
As an alternative embodiment, the pores of the first and/or second porous insulating smear are circular or oval in shape.
As an alternative embodiment, the thickness of the first porous insulating smear and/or the second porous insulating smear is 14-18 μm.
As an alternative embodiment, the material of the first porous insulating smear and/or the second porous insulating smear is a porous nanomaterial.
The invention also provides a battery, which comprises the positive plate, a negative plate, a diaphragm and a tab, wherein,
the diaphragm is located between the positive plate and the negative plate, and the positive plate, the negative plate and the diaphragm are wound along the starting end to form a battery cell structure.
As an alternative embodiment, the positive plate further comprises a second positive plate smear and a second porous insulating smear, wherein,
the second positive smear is coated on a second surface opposite to the first surface;
the first area of the second porous insulating smear is coated on the surface of the second positive electrode smear far away from the positive electrode current collector, and the second area of the second porous insulating smear is coated on the second surface of the positive electrode current collector;
the projection of the first porous insulating smear in the thickness direction of the battery core structure is at least partially overlapped with the projection of the second porous insulating smear in the thickness direction of the battery core structure.
As an alternative embodiment, along the winding direction of the positive plate, the positive plate comprises a first empty foil area at the head end of winding and a coating area connected with the first empty foil area, and the first positive smear and the second positive smear are coated on the coating area;
the first porous insulating smear and/or the second porous insulating smear cover the first empty foil area and the coating area, or
Along the winding direction of the positive plate, the positive plate comprises a second empty foil area positioned at the tail end of winding and a coating area connected with the second empty foil area, and the first positive smear and the second positive smear are coated on the coating area;
the first porous insulating smear and/or the second porous insulating smear covers the second empty foil area and the coated area.
As an optional embodiment, the first positive electrode smear and/or the second positive electrode smear comprise a groove, the bottom wall of the groove is a current collector, and the tab is arranged in the groove;
the first porous insulating smear and/or the second porous insulating smear covers the recess.
One of the above technical solutions has the following advantages or beneficial effects:
in the embodiment of the invention, the first porous insulating smear and the second porous insulating smear are used for replacing the gummed paper, so that the situation that the capacity of the pasted parts of the first positive smear and the second positive smear can not be exerted while the battery short circuit caused by burrs is effectively prevented, and the energy density of the lithium ion battery is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a side view of a positive electrode sheet according to an embodiment of the present invention;
fig. 2 is a top view of a structure of a positive plate according to an embodiment of the present invention;
fig. 3 is a side view of another structure of a positive electrode sheet according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a winding core structure provided by an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a side view of a structure of a positive plate according to an embodiment of the present invention, as shown in fig. 1, the positive plate includes: a positive current collector 10, a first positive smear 20, and a first porous insulating smear 30 on the first positive smear 20, wherein,
the first positive electrode smear 20 is coated on the surface of the positive electrode current collector 10;
a first area of the first porous insulating smear 30 covers the surface of the first positive electrode smear 20 away from the positive current collector 10, a second area of the first porous insulating smear 30 covers the surface of the positive current collector 10, and the first area and the second area of the first porous insulating smear 30 are adjacent. As an alternative embodiment, the first or second porous insulating smear 30, 31 is provided as a porous electronic insulating smear.
In the embodiment, the first porous insulating smear 30 is used for replacing the gummed paper, so that the area of the first positive smear 20 covered by the first porous insulating smear 30 can be in contact with the electrolyte for electrical circulation, the condition that the pasted part of the gummed paper cannot exert capacity is effectively avoided, and the energy density of the battery is improved.
As shown in fig. 2, the first area of the first porous insulating smear 30 is coated on the surface of the first positive electrode smear 20 away from the positive electrode current collector 10, and the second area of the first porous insulating smear 30 is coated on the surface of the positive electrode current collector 10, so that the first porous insulating smear 30 can prevent the battery short circuit and other problems caused by the burrs penetrating the separator 50 while the first positive electrode smear 20 exerts capacity, and the service life of the battery can be maintained for a long time.
As an alternative embodiment, as shown in fig. 3, the positive plate further comprises a second positive plate smear 21 and a second porous insulating smear 31, wherein,
the first positive electrode smear 20 is coated on the first surface of the positive electrode current collector 10, the second positive electrode smear 21 is coated on the second surface of the positive electrode current collector 10, and the first surface and the second surface of the positive electrode current collector 10 are opposite;
a first area of the second porous insulating smear 31 is coated on the surface of the second positive electrode smear 21 away from the positive electrode current collector 10, a second area of the second porous insulating smear 31 is coated on the second surface of the positive electrode current collector 10, and the first area and the second area of the second porous insulating smear 31 are adjacent.
In the embodiment, the surfaces of the first positive smear 20 and the second positive smear 21 on the two sides of the positive plate can be coated with the porous insulating smears, so that the area of the first positive smear 20 covered by the first porous insulating smear 30 and the area of the second positive smear 21 covered by the second porous insulating smear 31 can be contacted with the electrolyte of the battery to further perform the electric circulation of the battery, the situation that the capacity cannot be exerted by the adhesive tape pasting part is effectively avoided, and the purpose of improving the energy density of the battery is achieved.
In addition, the first porous insulating smear 30 and the second porous insulating smear 31 can prevent the occurrence of short circuit phenomenon caused by the contact of the burr penetrating diaphragm 50 and the first positive smear 20 or the second positive smear 21, and achieve the same protection effect as the gummed paper.
As an alternative embodiment, the porosity of the first porous insulating smear 30 and/or the second porous insulating smear 31 is 12-25%.
In this embodiment, the porosity of the first porous insulating smear 30 and the second porous insulating smear 31 is 12-25%, so that the covered area of the first positive smear 20 and the second positive smear 21 can be effectively contacted with the electrolyte for electrical circulation, and the energy density of the battery can be improved.
In addition, the porosity of the first and second porous insulating smears 30 and 31 is 12-25%, which can prevent burrs from directly contacting the surfaces of the first and second positive smears 20 and 21 through holes, and reduce the possibility of short circuit of the battery.
In addition, the holes of the first porous insulating smear 30 and the second porous insulating smear 31 can store certain electrolyte, and the first porous insulating smear 30 and the second porous insulating smear 31 can release the stored electrolyte under the condition that the electrolyte is insufficient in the later period of battery use, so that the service life of the battery is prolonged.
As an alternative embodiment, the pores of the first porous insulating smear 30 and/or the second porous insulating smear 31 are circular or oval in shape.
In this embodiment, the holes of the first and second porous insulating smears 30 and 31 are circular or elliptical to effectively transport and store the electrolyte of the battery, and the influence of coating the first and second porous insulating smears 30 and 31 on the energy density of the first and second positive smears 20 and 21 is minimized. Meanwhile, the hole shapes of the first porous insulating smear 30 and the second porous insulating smear 31 are set to be circular or oval, so that the processing technology can be simplified, and the production efficiency can be improved.
As an alternative embodiment, the thickness of the first porous insulating smear 30 and/or the second porous insulating smear 31 is 14-18 μm.
In this embodiment, the first and second porous insulating smears 30 and 31 have a thickness of 14 to 18 μm, which is effective in blocking the possibility of burrs coming into contact with the surface of the first or second positive smear 20 or 21. In addition, the thickness of the first and second porous insulating smears 30 and 31 is 14-18 μm, so that the first and second porous insulating smears 30 and 31 can store a small amount of electrolyte, and the electrolyte can be replenished in the later period of the battery cycle, thereby prolonging the service life of the battery.
As an alternative embodiment, the material of the first porous insulating smear 30 and/or the second porous insulating smear 31 is a porous nanomaterial.
In this embodiment, the first porous insulating smear 30 and the second porous insulating smear 31 are made of porous nanomaterial, such as alumina or silica, so that the first porous insulating smear 30 and the second porous insulating smear 31 can store a certain amount of electrolyte. After the electrolyte is depleted after the battery has been in use for a period of time, the first and second porous insulating smears 30 and 31 can release the stored electrolyte to maintain the energy density of the battery.
The excessive thickness of the first porous insulating smear 30 and the second porous insulating smear 31 can cause the first porous insulating smear 30 and the second porous insulating smear 31 to absorb excessive electrolyte, so that the energy density of the lithium ion battery is lower than the design requirement; the short circuit problem can be caused by that burrs at the ending position of the first positive electrode smear 20 or the second positive electrode smear 21 pierce the diaphragm 50 to contact with the negative electrode sheet 40 of the lithium ion battery due to the fact that the thicknesses of the first porous insulating smear 30 and the second porous insulating smear 31 are too small.
The invention also provides a battery, which comprises the positive plate, a negative plate 40, a diaphragm 50 and a tab, wherein,
the diaphragm 50 is located between the positive plate and the negative plate 40, and the positive plate, the negative plate 40 and the diaphragm 50 are wound along the starting ends to form a cell structure.
In this embodiment, as shown in fig. 4, a cell structure is formed by winding the positive electrode sheet, the negative electrode sheet 40 and the separator 50 along the starting end, so that the battery maintains a high energy density, and the separator 50 can effectively prevent a short circuit of the battery.
The starting ends of the first positive smear 20 and the second positive smear 21 on the surface of the positive plate correspond to the starting end of the negative coating on the surface of the negative plate 40 in the thickness direction of the diaphragm 50, and the ending ends of the first positive smear 20 and the second positive smear 21 on the surface of the positive plate correspond to the ending end of the negative coating on the surface of the negative plate 40 in the thickness direction of the diaphragm 50, so that the effective electrical cycle of the battery is realized.
The positive plate, the negative plate 40 and the diaphragm 50 are quadrangles with the shapes and sizes matched, so that redundant materials of the positive plate, the negative plate 40 or the diaphragm 50 do not exist in the wound battery cell structure, and material waste is avoided.
As an alternative embodiment, the positive plate further comprises a second positive plate smear 21 and a second porous insulating smear 31, wherein,
the second positive smear 21 is coated on the second surface opposite to the first surface;
a first area of the second porous insulating smear 31 is coated on the surface of the second positive electrode smear 21 far away from the positive electrode current collector, and a second area of the second porous insulating smear 31 is coated on a second surface of the positive electrode current collector;
the projection of the first porous insulating smear 30 in the thickness direction of the cell structure at least partially coincides with the projection of the second porous insulating smear 31 in the thickness direction of the cell structure.
In this embodiment, the second positive electrode smear 21 and the second porous insulating smear 31 can also block burrs and increase the energy density of the battery, and are not described herein again.
As an alternative embodiment, along the winding direction of the positive plate, the positive plate comprises a first empty foil area at the head end of the winding and a coating area connected with the first empty foil area, and the first positive smear and the second positive smear are coated on the coating area;
the first porous insulating smear 30 and/or the second porous insulating smear 31 cover the first empty foil area and the coating area, or
Along the winding direction of the positive plate, the positive plate comprises a second empty foil area positioned at the winding tail end and a coating area connected with the second empty foil area, and the first positive smear and the second positive smear are coated on the coating area;
the first porous insulating smear 30 and/or the second porous insulating smear 31 cover the second empty foil area and the coated area.
In this embodiment, since there is a possibility that burrs are formed at the start and end ends of the first and second positive smears 20 and 21 during the coating of the first and second positive smears 20 and 21 of the positive plates, it is necessary to coat the start and end ends of the first and second positive smears 20 and 21 with the first or second porous insulating smears 30 and 31 to prevent short circuits caused by the burrs.
As an alternative embodiment, the first positive electrode smear 20 and/or the second positive electrode smear 21 comprise a groove, the bottom wall of the groove is a current collector, and the tab is arranged in the groove; a first porous insulating smear and/or a second porous insulating smear covers the recess. .
In this embodiment, in order to increase the magnification of the battery, the tab is usually fixed at an intermediate position of the positive or negative electrode sheet 40. With the tab secured in the intermediate position, there is a possibility of burrs around and on the tab that may also cause a short circuit through the membrane 50 into contact with the other pole piece. Therefore, in the embodiment of the invention, the coating position of the first porous insulation smear 30 or the coating position of the second porous insulation smear 31 is the surface of the positive plate corresponding to the tab on the surface of the negative plate 40, thereby effectively avoiding short circuit caused by burrs and simultaneously increasing the energy density of the battery.
The embodiment of the application also provides electronic equipment comprising the battery.
It should be noted that the implementation manner of the above battery embodiment is also applicable to the embodiment of the electronic device, and can achieve the same technical effect, and details are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A positive electrode sheet, comprising: a positive electrode current collector, a first positive electrode smear and a first porous insulating smear on the first positive electrode smear, wherein,
the first positive smear is coated on the surface of the positive current collector;
the first porous insulating smear comprises a first area and a second area which are adjacent, wherein the first area covers the surface of the first positive electrode smear far away from the positive electrode current collector, and the second area of the first porous insulating smear covers the surface of the positive electrode current collector.
2. The positive plate according to claim 1, further comprising a second positive plate smear and a second porous insulating smear, wherein,
the first positive electrode smear is coated on the first surface of the positive electrode current collector, the second positive electrode smear is coated on the second surface of the positive electrode current collector, and the first surface and the second surface of the positive electrode current collector are opposite;
the first area of the second porous insulating smear is coated on the surface of the second positive electrode smear far away from the positive electrode current collector, the second area of the second porous insulating smear is coated on the second surface of the positive electrode current collector, and the first area and the second area of the second porous insulating smear are adjacent.
3. The positive plate according to claim 2, wherein the porosity of the first porous insulating smear and/or the second porous insulating smear is 12-25%.
4. The positive plate according to claim 2, wherein the pores of the first porous insulating smear and/or the second porous insulating smear are circular or oval in shape.
5. The positive plate according to claim 2, wherein the thickness of the first porous insulating smear and/or the second porous insulating smear is 14-18 μm.
6. The positive plate according to claim 2, wherein the material of the first porous insulating smear and/or the second porous insulating smear is a porous nanomaterial.
7. A battery comprising the positive electrode sheet according to any one of claims 1 to 6, and further comprising a negative electrode sheet, a separator and a tab, wherein,
the diaphragm is located between the positive plate and the negative plate, and the positive plate, the negative plate and the diaphragm are wound along the starting end to form a battery cell structure.
8. The battery of claim 7 wherein said positive plate further comprises a second positive plate smear and a second porous insulating smear, wherein,
the second positive smear is coated on a second surface opposite to the first surface;
the first area of the second porous insulating smear is coated on the surface of the second positive electrode smear far away from the positive electrode current collector, and the second area of the second porous insulating smear is coated on the second surface of the positive electrode current collector;
the projection of the first porous insulating smear in the thickness direction of the battery core structure is at least partially overlapped with the projection of the second porous insulating smear in the thickness direction of the battery core structure.
9. The battery according to claim 8, wherein in the winding direction of the positive electrode sheet, the positive electrode sheet includes a first empty foil region at the head end of winding and a coating region connected to the first empty foil region, the first positive electrode smear and the second positive electrode smear being coated on the coating region;
the first porous insulating smear and/or the second porous insulating smear cover the first empty foil area and the coating area, or
Along the winding direction of the positive plate, the positive plate comprises a second empty foil area positioned at the tail end of winding and a coating area connected with the second empty foil area, and the first positive smear and the second positive smear are coated on the coating area;
the first porous insulating smear and/or the second porous insulating smear covers the second empty foil area and the coated area.
10. The battery according to claim 8,
the first positive smear and/or the second positive smear comprise a groove, the bottom wall of the groove is a current collector, and the tab is arranged in the groove;
the first porous insulating smear and/or the second porous insulating smear covers the recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111535422.5A CN114203960A (en) | 2021-12-15 | 2021-12-15 | Positive plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111535422.5A CN114203960A (en) | 2021-12-15 | 2021-12-15 | Positive plate and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114203960A true CN114203960A (en) | 2022-03-18 |
Family
ID=80654116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111535422.5A Pending CN114203960A (en) | 2021-12-15 | 2021-12-15 | Positive plate and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114203960A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1770537A (en) * | 2004-10-28 | 2006-05-10 | 三星Sdi株式会社 | Secondary battery and electrode plate therefor |
| CN101958427A (en) * | 2009-07-16 | 2011-01-26 | 三星Sdi株式会社 | Rechargeable battery |
| WO2017057762A1 (en) * | 2015-09-30 | 2017-04-06 | 積水化学工業株式会社 | Electrode portion of lithium ion secondary battery, lithium ion secondary battery, and manufacturing method of lithium ion secondary battery |
| CN214588911U (en) * | 2021-04-20 | 2021-11-02 | 珠海冠宇电池股份有限公司 | Battery with a battery cell |
-
2021
- 2021-12-15 CN CN202111535422.5A patent/CN114203960A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1770537A (en) * | 2004-10-28 | 2006-05-10 | 三星Sdi株式会社 | Secondary battery and electrode plate therefor |
| CN101958427A (en) * | 2009-07-16 | 2011-01-26 | 三星Sdi株式会社 | Rechargeable battery |
| WO2017057762A1 (en) * | 2015-09-30 | 2017-04-06 | 積水化学工業株式会社 | Electrode portion of lithium ion secondary battery, lithium ion secondary battery, and manufacturing method of lithium ion secondary battery |
| CN214588911U (en) * | 2021-04-20 | 2021-11-02 | 珠海冠宇电池股份有限公司 | Battery with a battery cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212380440U (en) | Winding type battery cell and battery | |
| US20120196167A1 (en) | Electrode assembly for a battery and method for manufacturing same | |
| CN103262307B (en) | Lithium secondary battery and method for manufacturing same | |
| CN113826240A (en) | Electrode assembly and electrochemical device | |
| CN208173683U (en) | Wind battery core and battery | |
| CN113013377A (en) | Battery with a battery cell | |
| WO2017057762A1 (en) | Electrode portion of lithium ion secondary battery, lithium ion secondary battery, and manufacturing method of lithium ion secondary battery | |
| KR101079497B1 (en) | Methods for manufacturing electric double layer capacitor cell and electric double layer capacitor and apparatus for manufacturing electric double layer capacitor cell | |
| JP4765326B2 (en) | Winding type power storage device | |
| CN218299826U (en) | Pole piece, roll up core and battery | |
| CN112687840A (en) | Electrode sheet and battery | |
| CN214588911U (en) | Battery with a battery cell | |
| KR102136599B1 (en) | Electrochemical device | |
| JP2015215988A (en) | Square battery | |
| CN211957698U (en) | High-infiltration high-capacity lithium ion battery | |
| CN113054328A (en) | Utmost point ear, pole piece and lithium ion battery | |
| CN114203960A (en) | Positive plate and battery | |
| CN116404269A (en) | Battery cell, battery and electric equipment | |
| CN216928675U (en) | Battery with a battery cell | |
| CN114242937A (en) | Battery cell and battery | |
| CN215896641U (en) | Electrochemical device and electronic device | |
| JP2018088379A (en) | Bipolar electrode, method for manufacturing the same, and power storage divice | |
| JP2017059458A (en) | Method of manufacturing lithium ion secondary battery and electrode structure for lithium ion secondary battery | |
| CN218004965U (en) | Roll up core and battery | |
| CN220627848U (en) | Positive plate and winding type lithium ion battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |