CN112614965A - Preparation method of battery pole piece - Google Patents
Preparation method of battery pole piece Download PDFInfo
- Publication number
- CN112614965A CN112614965A CN202011355917.5A CN202011355917A CN112614965A CN 112614965 A CN112614965 A CN 112614965A CN 202011355917 A CN202011355917 A CN 202011355917A CN 112614965 A CN112614965 A CN 112614965A
- Authority
- CN
- China
- Prior art keywords
- current collector
- groove
- pole piece
- battery pole
- laser
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/0471—Processes of manufacture in general involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
-
- 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
- H01M4/06—Electrodes for primary cells
- H01M4/08—Processes of manufacture
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention relates to a preparation method of a battery pole piece, wherein a heat removal layer is pasted on a reserved position of a lug of a current collector, and the heat removal layer can fall off from the current collector when reaching a certain temperature; coating active substances on the current collector and the thermal release layer; heating the current collector coated with the active substance to solidify the active substance and enable the heat removal layer to fall off from the current collector, so that a groove for welding a tab is formed on the current collector; and trimming the side wall of the groove by laser to ensure that the slope angle alpha of the side wall of the groove is less than or equal to 90 degrees. Can repair the lateral wall of recess fast accurately through laser sculpture's mode, cut off unnecessary uneven part for the lateral wall of the recess that forms after the thermal stratification is taken off levels burr-free, and when the roll-in pole piece, the pole piece can not have the burr and the inhomogeneous pole piece fracture that leads to of atress because of active material, also can not appear falling the powder because the lateral wall unevenness of recess, pollute the risk of pole piece.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a preparation method of a battery pole piece.
Background
The pole piece is the main component of battery, and it usually is to scribble the coating active material and make on the mass flow body, and at present, in order to improve the energy density of pole piece, the pole piece can reserve the recess of welding utmost point ear on the mass flow body usually when the coating, guarantees that utmost point ear welded recess does not have the active material and covers.
In the prior art, the grooves are formed by sticking foaming adhesive or thermal shrinkage adhesive on the reserved positions of the lugs of the current collector, then coating active substances on the whole, baking at high temperature to enable the foaming adhesive or the thermal shrinkage adhesive to be bent, expanded and then fall off, and further driving active substance layers on the foaming adhesive or the thermal shrinkage adhesive to fall off together, so that the grooves without active substance coverage are formed on the current collector.
However, in practical applications, there are the following problems: 1) when the groove reserved at the welding position of the tab is prepared on the pole piece, when the foaming glue is adhered on the current collector, the amount of the active material coated on the current collector by the coating machine is unchanged, so that the thickness of the position coated with the foaming glue is higher than the thickness of other positions of the pole piece (as shown in fig. 1). When the current collector coated with the active substance is dried by a coating oven, the foaming adhesive is heated and peeled off to form a groove without being covered by the active substance, the thickness of a coating film at the edge of the groove is slightly larger than the standard thickness of the pole piece (namely the thickness of other positions of the pole piece, as shown in figure 2), and when the current collector is rolled, the raised active substance is locally stressed to cause the pole piece to be broken;
2) meanwhile, when the foaming adhesive is heated to expand and peel off, the stress of an active material layer is uneven, so that the slope surface of the formed groove is extremely irregular, and the active material on the slope surface has the risk of falling off again, thereby possibly polluting the pole piece.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problem that the existing pole piece is easy to break during preparation, the preparation method of the battery pole piece is provided.
In order to solve the technical problem, an embodiment of the present invention provides a method for preparing a battery pole piece, including:
sticking a heat removal layer on a reserved position of a lug of the current collector, wherein the heat removal layer can fall off from the current collector when reaching a certain temperature;
coating an active material on the current collector and the thermal release layer;
heating a current collector coated with an active substance to solidify the active substance and enable the heat removal layer to fall off the current collector, so that a groove for welding a tab is formed on the current collector;
and trimming the side wall of the groove by laser to ensure that the slope angle alpha of the side wall of the groove is less than or equal to 90 degrees.
Optionally, the trimming the side wall of the groove by laser is specifically: and engraving and finishing the side wall of the groove by using a laser engraving machine.
Optionally, the engraving and trimming the side wall of the groove by the laser engraving machine is more specifically: measuring the contour information, the size information and the position information of the groove through a scanner, uploading the contour information, the size information and the position information of the groove to a graph software by the scanner, analyzing the contour information, the size information and the position information of the groove by the graph software, and then transmitting the contour information, the size information and the position information to a laser engraving machine, and engraving and trimming the side wall of the groove by the laser engraving machine according to the received contour information, the size information and the position information of the groove.
Optionally, the scanner employs a laser profile scanner or an industrial camera.
Optionally, the heating the current collector coated with the active material specifically includes: and conveying the current collector to an oven with different temperature zones for heating.
Optionally, different warm areas include preheating zone and high temperature zone, the mass flow body is first through the preheating zone, is heated the intensification in the preheating zone, makes active material solidifies, passes through the high temperature zone again, makes heat removes the layer and is heated the follow the mass flow body is gone up and is come off with form the recess that is used for welding utmost point ear on the mass flow body.
Optionally, the heat removal layer is a foam rubber or a heat shrinkable rubber.
Optionally, the temperature of the high temperature zone ranges from 80 ℃ to 150 ℃.
Optionally, the coating of the active material on the current collector and the thermal release layer is specifically: coating an active material on the current collector and the heat removal layer by a coater.
Optionally, the preparation method of the battery pole piece further comprises welding a tab on the trimmed groove.
Compared with the prior art, the preparation method of the battery pole piece provided by the embodiment of the invention has the advantages that the heat removal layer is pasted on the reserved position of the lug of the current collector, wherein the heat removal layer can fall off the current collector when reaching a certain temperature; coating active substances on the current collector and the thermal release layer; heating the current collector coated with the active substance to solidify the active substance and enable the heat removal layer to fall off from the current collector, so that a groove for welding a tab is formed on the current collector; the method improves the production efficiency of the pole piece, and compared with the existing method that active substances are coated on the current collector at intervals, the size of the groove for welding the pole lug can be smaller (the size of the groove can be controlled by controlling the size of the heat removal layer), and the energy density of the pole piece is improved; and can repair the lateral wall of recess fast accurately through the mode of laser sculpture, cut off unnecessary uneven part for the lateral wall of recess that forms after the thermal stratification is taken off is leveled no burr, and when the roll-in pole piece, the pole piece can not have the burr and the atress is inhomogeneous leads to the pole piece fracture because of the active material, also can not appear falling the powder because the lateral wall of recess is uneven, pollute the risk of pole piece yet.
Drawings
Fig. 1 is a schematic structural diagram of a current collector to which a thermal release layer is attached according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of an active material coated on a current collector and a thermal release layer according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram illustrating a thermal desorption layer falling off from a current collector to form a groove according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a groove provided in an embodiment of the present invention after laser trimming of a sidewall of the groove.
The reference numerals in the specification are as follows:
1. a current collector;
2. thermally removing the layer;
3. a groove;
4. an active substance.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The preparation method of the battery pole piece provided by the embodiment of the invention comprises the following steps:
s10: obtaining raw materials for manufacturing the pole piece: a current collector and a thermal release layer.
S20: as shown in fig. 1, a heat removal layer 2 is adhered to a tab reserved position of a current collector 1, wherein the heat removal layer 2 can fall off from the current collector 1 when reaching a certain temperature (the temperature is related to the material of the heat removal layer 2); wherein, the thermal removing layer 2 can be foam rubber or thermal shrinkage rubber.
S30: as shown in fig. 2, an active material 4 is coated on the current collector 1 and the thermal release layer 2. When the manufactured pole piece is a positive pole piece, the active substance 4 comprises lithium cobaltate, glue solution, conductive agent and solvent, wherein the lithium cobaltate can be replaced by lithium iron phosphate, the glue solution can be PVDF (polyvinylidene fluoride) glue solution, the conductive agent can be carbon, and the solvent can be NMP (N-methyl pyrrolidone);
when the manufactured pole piece is a negative pole piece, the active substance 4 comprises graphite, a conductive agent, glue solution and a solvent, wherein the conductive agent can adopt carbon, the glue solution can adopt CMC (sodium carboxymethylcellulose), and the solvent can adopt water.
S40: as shown in fig. 3, heating the current collector 1 coated with the active material 4 solidifies the active material 4 and causes the thermally removed layer 2 to be peeled off from the current collector 1, thereby forming the groove 3 for welding a tab on the current collector 1.
S50: as shown in fig. 4, the side walls of the groove 3 are trimmed by laser so that the slope angle α of the side walls of the groove 3 is less than or equal to 90 °.
Compared with the prior art, the preparation method of the battery pole piece provided by the embodiment of the invention has the advantages that the heat removal layer 2 is adhered to the reserved position of the lug of the current collector 1, wherein the heat removal layer 2 can fall off from the current collector 1 when reaching a certain temperature; coating an active material 4 on the current collector 1 and the thermal release layer 2; heating the current collector 1 coated with the active material 4 to solidify the active material 4 and make the heat removal layer 2 fall off from the current collector 1, so as to form a groove 3 for welding a tab on the current collector 1; the method improves the production efficiency of the pole piece, and compared with the existing method that the active substances 4 are coated on the current collector 1 at intervals, the size of the groove 3 for welding the pole lug can be smaller (the size of the groove 3 can be controlled by controlling the size of the heat removal layer 2), so that the energy density of the pole piece is improved; and can repair the lateral wall of recess 3 fast accurately through the mode of laser sculpture, cut off unnecessary uneven part for the lateral wall of recess 3 that the hot destroyer 2 formed after droing is leveled no burr, and when the roll-in pole piece, the pole piece can not have the burr and the atress is inhomogeneous because of active material 4 and lead to the pole piece fracture, also can not appear falling the powder because the lateral wall of recess 3 is uneven, pollute the risk of pole piece.
In one embodiment, step S50 is to trim the sidewalls of the groove 3 by laser, specifically: and engraving and finishing the side wall of the groove 3 by using a laser engraving machine.
Preferably, the engraving finishing of the side walls of the grooves 3 by means of a laser engraving machine is more specifically: the profile information, the size information and the position information of the groove 3 are measured through the scanner, the profile information, the size information and the position information of the groove 3 are uploaded to the graph software through the scanner, the graph software is used for analyzing the profile information, the size information and the position information of the groove 3 and then transmitting the profile information, the size information and the position information to the laser engraving machine, and the laser engraving machine engraves and trims the side wall of the groove 3 according to the received profile information, the size information and the position information of the groove 3.
For example, the laser engraving machine comprises a control system, a laser, an optical path channel and a laser head, the laser head is communicated with the optical path channel, laser emitted by the laser reaches the laser head through the optical path channel, the laser head performs laser engraving and trimming on the side wall of the groove 3, wherein software is integrated in the control system, the software is used for receiving and analyzing profile information, dimension information and position information of the groove 3 transmitted by the scanner, the control system controls the laser head to perform laser engraving and trimming on the side wall of the groove 3 according to the information analyzed by the software, redundant uneven parts are cut off, and the slope angle alpha of the side wall of the groove 3 is smaller than or equal to 90 degrees. The laser is adopted to irradiate the surface of the material, so that the material is instantly melted and gasified, the surface of the material can be smooth and delicate, the aim of modifying the side wall of the groove 3 is fulfilled, and the laser processing device has the advantages of high processing precision, high speed, consistent effect, high speed, quickness, low cost and the like.
The scanner may be a laser profile scanner or an industrial camera. The laser engraving machine can adopt the existing laser engraving machine, and the graph software is the software matched with the laser engraving machine, which is the prior art, so the structure and the principle of the laser engraving machine are not described in detail herein.
Preferably, the scanner adopts a laser profile scanner, and the laser profile scanner has the advantages of high frequency and high precision and can carry out mapping in any environment.
In one embodiment, step S30, namely, coating the active material 4 on the current collector 1 and the thermal release layer 2 is specifically: the active material 4 is coated on the current collector 1 and the heat removal layer 2 by a coater. The coating of the active material 4 onto the current collector 1 and the heat removal layer 2 by the coater may improve the coating efficiency.
Specifically, the method may include firstly pasting a thermal removal layer 2 on a tab reserved position of a current collector 1, conveying the current collector 1 pasted with the thermal removal layer 2 to a coating machine for coating, so that an active material 4 covers the current collector 1 and the thermal removal layer 2, heating the current collector 1 coated with the active material 4 by a heating device to solidify the active material 4 and make the thermal removal layer 2 fall off from the current collector 1, thereby forming a groove 3 for welding a tab on the current collector 1, continuously conveying the current collector 1 formed with the groove 3 to a laser engraving machine, measuring profile information, size information and position information of the groove 3 by a scanner, uploading the profile information, the size information and the position information of the groove 3 to a chart software by the scanner, receiving the profile information, the size information and the position information of the groove 3 transmitted by the scanner by the chart software and analyzing the chart software, the control system controls the laser head to carry out laser engraving and trimming on the side wall of the groove 3 according to the information analyzed by the graph software, so that the slope angle alpha of the side wall of the groove 3 is smaller than or equal to 90 degrees. Wherein can the manual work remove layer 2 with heat and paste on the utmost point ear reservation position of mass flow body 1, also can remove layer 2 with heat through pasting the device and paste on the utmost point ear reservation position of mass flow body 1.
In one embodiment, the step S40 of heating the current collector 1 coated with the active material 4 specifically includes: and (3) conveying the current collector 1 to an oven with different temperature zones for heating.
Preferably, different warm areas include preheating zone and high temperature zone, and the mass flow body 1 passes through the preheating zone earlier, is heated the intensification in the preheating zone for active material 4 solidifies, passes through the high temperature zone again, makes heat remove layer 2 be heated and drops in order to form the recess 3 that is used for welding utmost point ear on the mass flow body 1 from the mass flow body 1. The temperature of the preheating zone is mainly related to the solidification temperature of the active material 4, so long as the solidification of the active material 4 is ensured and the thermal removal layer 2 does not fall off.
Preferably, the temperature of the high temperature zone is in the range of 80 ℃ to 150 ℃. The specific temperature range of the high temperature zone can be selected according to the material of the heat removal layer 2, for example, when the heat removal layer 2 is made of foaming glue, the foaming temperature of the foaming glue is 100 ℃ to 130 ℃, and at this time, the temperature of the high temperature zone can be set to 100 ℃ to 130 ℃. The foaming gel reaches the foaming temperature to expand and collapse, and the active material layer on the foaming gel and at the edge of the foaming gel is driven to be broken when the foaming gel expands and collapses, so that a groove 3 is formed on the current collector 1.
Preferably, the current collector 1 uniformly passes through the oven with different temperature zones, so that the current collector 1 is uniformly heated, and the manufactured pole piece is more regular and has better quality.
In an embodiment, after step S50, i.e., after the trimming of the side walls of the grooves 3 by laser, the battery pole piece preparation method further includes step S60: the current collector 1 and the active material 4 coated thereon are rolled together. To improve the tightness between the active material 4 and the current collector 1 and to improve the energy density.
In an embodiment, the method for preparing a battery pole piece further includes, S70: and welding a tab on the trimmed groove 3.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A preparation method of a battery pole piece is characterized by comprising the following steps:
sticking a heat removal layer on a reserved position of a lug of the current collector, wherein the heat removal layer can fall off from the current collector when reaching a certain temperature;
coating an active material on the current collector and the thermal release layer;
heating a current collector coated with an active substance to solidify the active substance and enable the heat removal layer to fall off the current collector, so that a groove for welding a tab is formed on the current collector;
and trimming the side wall of the groove by laser to ensure that the slope angle alpha of the side wall of the groove is less than or equal to 90 degrees.
2. The preparation method of the battery pole piece according to claim 1, wherein the trimming of the side wall of the groove by laser is specifically: and engraving and finishing the side wall of the groove by using a laser engraving machine.
3. The preparation method of the battery pole piece, according to claim 2, is characterized in that the engraving and trimming of the side wall of the groove by the laser engraving machine is more specifically: measuring the contour information, the size information and the position information of the groove through a scanner, uploading the contour information, the size information and the position information of the groove to a graph software by the scanner, analyzing the contour information, the size information and the position information of the groove by the graph software, and then transmitting the contour information, the size information and the position information to a laser engraving machine, and engraving and trimming the side wall of the groove by the laser engraving machine according to the received contour information, the size information and the position information of the groove.
4. The preparation method of the battery pole piece according to claim 3, wherein the scanner is a laser profile scanner or an industrial camera.
5. The method for preparing the battery pole piece according to claim 1, wherein the heating the current collector coated with the active material specifically comprises: and conveying the current collector to an oven with different temperature zones for heating.
6. The preparation method of the battery pole piece, according to claim 5, wherein the different temperature zones comprise a preheating zone and a high temperature zone, the current collector passes through the preheating zone, the temperature is raised in the preheating zone to solidify the active material, and then passes through the high temperature zone to enable the heat removing layer to be heated and fall off the current collector to form a groove for welding a tab on the current collector.
7. The preparation method of the battery pole piece according to claim 6, wherein the thermal release layer is foamed rubber or thermal shrinkable rubber.
8. The method for preparing the battery pole piece according to claim 7, wherein the temperature range of the high-temperature region is 80-150 ℃.
9. The method for preparing the battery pole piece according to claim 1, wherein the coating of the active material on the current collector and the thermal removing layer is specifically: coating an active material on the current collector and the heat removal layer by a coater.
10. The method for preparing the battery pole piece according to claim 1, further comprising welding a tab on the trimmed groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011355917.5A CN112614965A (en) | 2020-11-27 | 2020-11-27 | Preparation method of battery pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011355917.5A CN112614965A (en) | 2020-11-27 | 2020-11-27 | Preparation method of battery pole piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112614965A true CN112614965A (en) | 2021-04-06 |
Family
ID=75225595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011355917.5A Pending CN112614965A (en) | 2020-11-27 | 2020-11-27 | Preparation method of battery pole piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112614965A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023088428A1 (en) * | 2021-11-18 | 2023-05-25 | 珠海冠宇电池股份有限公司 | Plate and battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531848A (en) * | 2013-09-13 | 2014-01-22 | 东莞市天楠光电科技有限公司 | Overlapping winding preparation method of lithium ion secondary battery |
| CN105742565A (en) * | 2016-02-29 | 2016-07-06 | 宁德新能源科技有限公司 | Lithium ion battery pole plate and preparation method thereof |
| CN105990564A (en) * | 2015-02-11 | 2016-10-05 | 宁德新能源科技有限公司 | Substrate molding method |
| CN110666446A (en) * | 2019-08-31 | 2020-01-10 | 广东佳成新能源有限公司 | Lithium battery pole piece laser production method |
-
2020
- 2020-11-27 CN CN202011355917.5A patent/CN112614965A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531848A (en) * | 2013-09-13 | 2014-01-22 | 东莞市天楠光电科技有限公司 | Overlapping winding preparation method of lithium ion secondary battery |
| CN105990564A (en) * | 2015-02-11 | 2016-10-05 | 宁德新能源科技有限公司 | Substrate molding method |
| CN105742565A (en) * | 2016-02-29 | 2016-07-06 | 宁德新能源科技有限公司 | Lithium ion battery pole plate and preparation method thereof |
| CN110666446A (en) * | 2019-08-31 | 2020-01-10 | 广东佳成新能源有限公司 | Lithium battery pole piece laser production method |
Non-Patent Citations (1)
| Title |
|---|
| 江谷、朱雨川编: "《软包装印刷及后加工技术》", 30 September 2007 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023088428A1 (en) * | 2021-11-18 | 2023-05-25 | 珠海冠宇电池股份有限公司 | Plate and battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105742565B (en) | A kind of electrodes of lithium-ion batteries and preparation method thereof | |
| US7575606B2 (en) | Method for producing lithium ion secondary battery | |
| CN112614965A (en) | Preparation method of battery pole piece | |
| JP5348244B2 (en) | Battery electrode manufacturing method and coating die used therefor | |
| CN106207068B (en) | Method for preparing pole piece with embedded pole ear | |
| JP5311283B2 (en) | Nonaqueous electrolyte battery and manufacturing method thereof | |
| EP1739770A4 (en) | Lithium ion secondary battery and method for producing same | |
| CN112670436A (en) | Preparation method of battery pole piece | |
| JP2008243735A (en) | Solid electrolyte, its molding method, lithium ion secondary battery and its manufacturing method | |
| CN110556495A (en) | lithium ion battery diaphragm and lithium ion battery containing same | |
| CN112038558B (en) | Pole piece coating scraping system and pole piece coating scraping method | |
| JP5625328B2 (en) | Non-aqueous electrolyte secondary battery current collector and negative electrode using the same | |
| CN206148531U (en) | Pole piece coating clearing device | |
| CN114267822A (en) | Negative electrode containing lithium supplement layer, preparation method of negative electrode and lithium battery | |
| JP2000208134A (en) | Nonaqueous electrolyte secondary battery electrode and manufacture thereof | |
| CN206863449U (en) | A kind of lens element deicer and video camera | |
| JP2005190787A (en) | Electrode plate for nonaqueous electrolyte secondary battery and its manufacturing method | |
| CN108493483A (en) | A kind of solid electrolyte membrane battery core layer structural interface processing method, lithium cell structure | |
| CN112670437A (en) | Preparation method of battery pole piece | |
| WO2014141547A1 (en) | Device and method for producing lithium ion secondary battery | |
| CN112670438A (en) | Preparation method of battery pole piece | |
| JP2015032466A (en) | Electrode manufacturing method and electrode manufacturing device | |
| CN105355837A (en) | Electrochemical cell and method of making same | |
| US20200153027A1 (en) | Electrode pressure-bonding device | |
| KR20200123955A (en) | A method for manufacturing a free-standing film of solid electrolyte for an all solid state 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210406 |
|
| RJ01 | Rejection of invention patent application after publication |