CN114583111A - Preparation method of dry electrode capable of discharging continuously - Google Patents
Preparation method of dry electrode capable of discharging continuously Download PDFInfo
- Publication number
- CN114583111A CN114583111A CN202210151444.XA CN202210151444A CN114583111A CN 114583111 A CN114583111 A CN 114583111A CN 202210151444 A CN202210151444 A CN 202210151444A CN 114583111 A CN114583111 A CN 114583111A
- Authority
- CN
- China
- Prior art keywords
- materials
- mixing
- dry electrode
- preparation
- discharging
- 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
-
- 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
- H01M4/139—Processes of manufacture
-
- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides a preparation method of a dry electrode capable of discharging continuously, and relates to the field of battery preparation. The preparation method of the continuous discharging dry electrode comprises the following steps: s1, preparing materials: feeding the anode material or the cathode material into a powder metering tank; s2, mixing materials: mixing through a mixing channel; s3, shearing and mixing: stirring, shearing and mixing at high temperature through the four cavities; s4, discharging: conveying and discharging materials through three chambers; s5, shattering: crushing the agglomerated part inside the ultrasonic vibration sieve; s6, pressing and rolling; and S7, cutting. The invention realizes continuous discharging in the preparation process of the dry electrode, reduces the coating process and the use of solvent, can continuously and stably prepare the material into corresponding products, directly introduces the materials into a forming machine after mixing through continuous production processes, and prevents the materials from directly contacting air, so that the product quality stability is better, and the consumption of personnel, materials and energy is less.
Description
Technical Field
The invention relates to the technical field of battery manufacturing, in particular to a preparation method of a dry electrode capable of discharging continuously.
Background
Compared with the traditional lithium ion battery, the solid-state lithium ion battery has the following remarkable advantages: (1) high security performance, traditional lithium ion battery adopts organic liquid electrolyte, and under the abnormal conditions such as overcharge, internal short circuit, the battery easily generates heat, causes the electrolyte physiosis, and the nature, explosion even have serious potential safety hazard. The inorganic solid electrolyte material is non-combustible, non-corrosive and non-volatile, and has no leakage problem, and compared with a liquid electrolyte containing a combustible solvent, the polymer solid electrolyte greatly improves the safety of the battery. (2) High energy density: the battery has no liquid electrolyte and diaphragm, thereby reducing the weight of the battery, compressing the internal space of the battery and improving the volume energy density. (3) The working temperature range is wide: the solid-state lithium battery has good needling and high-temperature stability, and the problem of thermal runaway caused by the reaction of the anode material and the cathode material with liquid electrolyte at high temperature is avoided. (4) Long cycle life: the problem that the liquid electrolyte continuously forms and grows an SEI film in the charging and discharging point process and the problem that the lithium dendrite pierces the diaphragm can be effectively avoided, and the cyclicity and the service life of the battery are greatly improved. (5) The production efficiency is improved: and part of assembly processes are omitted, and the dead space in the battery is reduced. (6) The flexibility advantage is strong: the all-solid-state lithium battery can be prepared into a thin film battery and a flexible battery, and can be used in industries such as wearing and implanting medical equipment in the future.
However, in the preparation process of the conventional battery cell pole piece, the flow is too complex, the material is contacted with air in the production process, the product quality is unstable, the degree of automation is low, and more energy is consumed in the preparation process.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a preparation method of a dry electrode with continuous discharging, aiming at solving the problems of the prior art that the safety performance of a lithium battery is improved, the energy density is improved, the cycle life is prolonged, the applicable working temperature is wide, the appearance plasticity of the battery is strong, the coating process is reduced in the preparation process, the use of a solvent (NMP, liquid electrolyte) is saved, raw materials are prepared into a product from powder through continuous and stable equipment, the early-stage equipment investment cost is reduced, the production efficiency is high, the preparation method is suitable for large-scale production, and the preparation method has the advantages of high automation degree, prevention of direct contact of materials with air, good product quality stability, less loss of personnel, materials and energy and the like.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a preparation method of a dry electrode with continuous discharging comprises the following steps:
s1 preparation of materials
Respectively feeding the anode material or the cathode material into corresponding powder metering tanks through a servo screw to push the materials, and calculating the ratio by a full-automatic weightlessness metering method;
s2, mixing the materials
The powder metering tank drops the powdery material into the mixing barrel, and the materials are mixed through an internal double-shaft stator, so that the premixing is completed;
s3, shearing and mixing
Sequentially stirring, shearing and mixing the materials mixed in the S2 at high temperature in four cavities, wherein the temperature of the four cavities is sequentially increased by 80 ℃, 100 ℃, 120 ℃ and 150 ℃;
s4 discharge
The slurry sheared and mixed in the S3 is conveyed and discharged through three chambers in sequence, and the temperatures of the three chambers are 120 ℃, 100 ℃ and 80 ℃ in sequence and are decreased progressively;
s5, vibrating for crushing
Crushing the agglomerated part inside the discharged polymer powder by an ultrasonic vibration sieve;
s6, pressing and winding
Conveying the sieved polymer powder to a material groove of a hot roller press, rotating through two steel rollers, pressing and flowing out of a roller gap, and rolling and molding through a current collector below;
s7, cutting
And cutting the rolled and formed roll-shaped material into a process size, and assembling the battery.
Preferably, the powder metering tank is internally provided with a metering scale, and the full-automatic weightless metering method is used for controlling the proportion of each powder material.
Preferably, the shear mixing softens the vinyl material and disperses the large particulate material and polymerizes and homogenizes the molecules between the materials.
Preferably, the discharge particle size of the ultrasonic vibration sieve is 0.075-0.89 mm.
Preferably, the high-temperature heating mode in S3 is electric heating or heating by circulating heat transfer oil.
Preferably, the positive electrode material in S1 is ternary material, PEO, PVDF, C65, and lithium carbonate, and the negative electrode material is graphite, PEO, PVDF, and C65.
(III) advantageous effects
The invention provides a preparation method of a dry electrode capable of discharging continuously. The method has the following beneficial effects:
1. the invention realizes continuous discharging in the dry electrode preparation process, reduces coating procedures and solvent use, and can continuously and stably prepare materials into corresponding products.
2. According to the invention, through continuous production processes, the raw materials are directly introduced into a forming machine after being mixed, so that the direct contact of the materials with air is avoided, the product quality stability is better, and the consumption of personnel, materials and energy is less.
3. The dry electrode prepared by the invention improves the safety performance of the lithium battery, improves the energy density and the cycle life, and has wide applicable working temperature and strong appearance plasticity of the battery.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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.
The first embodiment is as follows:
the embodiment of the invention provides a preparation method of a dry electrode capable of discharging continuously, and the preparation method of a positive dry electrode comprises the following steps:
s1 preparation of materials
And (3) preparing a positive electrode material: the ternary material, the polyoxyethylene, the polyvinylidene fluoride, the C65 and the lithium carbonate are respectively fed into corresponding powder metering tanks through feeding, the powder metering tanks are internally provided with metering scales, the feeding adopts a servo screw to push the material, and the proportion is calculated by a full-automatic weightlessness metering method;
s2, mixing the materials
The powder metering tank drops the powdery material into the mixing barrel, and the materials are mixed through an internal double-shaft stator, so that the premixing is completed;
s3 shear mixing
Sequentially carrying out high-temperature stirring, shearing and mixing on the materials mixed in the S2 in four cavities, wherein the heating mode is electric heating or heating by circulating heat conduction oil, the temperatures of the four cavities are sequentially increased by 80 ℃, 100 ℃, 120 ℃ and 150 ℃, the shearing and mixing are carried out to soften the ethylene materials, disperse some large particle materials and carry out molecular polymerization and uniform stirring among the materials, and finally a ternary & C65 coated PEO material form is formed;
s4 discharge
The slurry sheared and mixed in the S3 is conveyed and discharged through three chambers in sequence, and the temperatures of the three chambers are 120 ℃, 100 ℃ and 80 ℃ in sequence and are decreased progressively;
s5, vibrating and crushing
After high-temperature heating, ethylene materials are softened, and after the materials are pushed out, parts of the materials are slightly bonded, the discharged polymer powder is crushed by an ultrasonic vibration sieve, the discharge granularity of the ultrasonic vibration sieve is 0.075-0.89 mm, and the polymer materials can be more uniformly pressed together with a current collector;
s6, pressing and winding
Conveying the sieved polymer powder to a material tank of a hot roller press, rotating through two steel rollers, pressing and flowing out from a roller gap, pressing the powder and a current collector, rolling and molding through the current collector below, pressing for the first time under a certain pressure through the hot roller press at 140 ℃, and then pressing and pressing to a process thickness through the hot roller press at 100 ℃ to roll;
s7, cutting
And cutting the rolled and formed roll-shaped material into a process size by using a cutting machine or a die cutting machine, and assembling the battery.
Example two:
the embodiment of the invention provides a preparation method of a dry electrode capable of discharging continuously, and the preparation method of a negative electrode dry electrode comprises the following steps:
s1 preparation of materials
And (3) preparing a negative electrode material: graphite, polyethylene oxide, polyvinylidene fluoride and C65 are respectively fed into corresponding powder metering tanks through feeding, metering scales are arranged inside the powder metering tanks, the feeding adopts a servo screw to push materials, and the proportion is calculated by a full-automatic weightlessness metering method;
s2, mixing the materials
The powder metering tank drops the powdery material into the mixing barrel, and the materials are mixed through an internal double-shaft stator, so that the premixing is completed;
s3 shear mixing
Sequentially carrying out high-temperature stirring, shearing and mixing on the materials mixed in the S2 in four cavities, wherein the heating mode is electric heating or heating by circulating heat conduction oil, the temperatures of the four cavities are sequentially increased by 80 ℃, 100 ℃, 120 ℃ and 150 ℃, the shearing and mixing are carried out to soften the ethylene materials, disperse some large particle materials and carry out molecular polymerization and uniform stirring among the materials, and finally a ternary & C65 coated PEO material form is formed;
s4 discharge
The slurry sheared and mixed in the S3 is conveyed and discharged through three chambers in sequence, and the temperatures of the three chambers are 120 ℃, 100 ℃ and 80 ℃ in sequence and are decreased progressively;
s5, vibrating for crushing
After high-temperature heating, ethylene materials are softened, and after the materials are pushed out, parts of the materials are slightly bonded, the discharged polymer powder is crushed by an ultrasonic vibration sieve, the discharge granularity of the ultrasonic vibration sieve is 0.075-0.89 mm, and the polymer materials can be more uniformly pressed together with a current collector;
s6, pressing and winding
Conveying the sieved polymer powder to a material tank of a hot roller press, rotating through two steel rollers, pressing and flowing out from a roller gap, pressing the powder and a current collector, rolling and molding through the current collector below, pressing for the first time under a certain pressure through the hot roller press at 140 ℃, and then pressing and pressing to a process thickness through the hot roller press at 100 ℃ to roll;
s7, cutting
And cutting the rolled and formed roll-shaped material into a process size by using a cutting machine or a die cutting machine, and assembling the battery.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A preparation method of a dry electrode with continuous discharging is characterized in that: the method comprises the following steps:
s1 preparation of materials
Respectively feeding the anode material or the cathode material into corresponding powder metering tanks through a servo screw to push the materials, and calculating the ratio by a full-automatic weightlessness metering method;
s2, mixing materials
The powder metering tank drops the powdery material into the mixing barrel, and the materials are mixed through an internal double-shaft stator, so that the premixing is completed;
s3 shear mixing
Sequentially carrying out high-temperature stirring, shearing and mixing on the materials mixed in the S2 in four cavities, wherein the temperatures of the four cavities are sequentially 80 ℃, 100 ℃, 120 ℃ and 150 ℃ in an increasing manner;
s4 discharge
The slurry sheared and mixed in the S3 is conveyed and discharged through three chambers in sequence, and the temperatures of the three chambers are 120 ℃, 100 ℃ and 80 ℃ in sequence and are decreased progressively;
s5, vibrating for crushing
Discharging the polymer powder, and crushing the agglomerated part inside the polymer powder through an ultrasonic vibration sieve;
s6, pressing and winding
Conveying the sieved polymer powder to a material groove of a hot roller press, rotating through two steel rollers, pressing and flowing out of a roller gap, and rolling and molding through a current collector below;
s7, cutting
And cutting the rolled and formed roll-shaped material into a process size, and assembling the battery.
2. The method of claim 1, wherein the step of preparing the continuous take-off dry electrode comprises: and the powder metering tank is internally provided with a metering scale, and the full-automatic weightless metering method is used for controlling the proportion of each powder material.
3. The method of claim 1, wherein the step of preparing the continuous take-off dry electrode comprises: the shear mixing softens the ethylene material and disperses some large particle materials and the molecules between the materials are polymerized and stirred evenly.
4. The method of claim 1, wherein the step of preparing the continuous take-off dry electrode comprises: the discharge granularity of the ultrasonic vibration sieve is 0.075-0.89 mm.
5. The method of claim 1, wherein the step of preparing the continuous take-off dry electrode comprises: and the high-temperature heating mode in the S3 is electric heating or heating by circulating heat conduction oil.
6. The method of claim 1, wherein the step of preparing the continuous take-off dry electrode comprises: the positive electrode material in the S1 is ternary material, PEO, PVDF, C65 and lithium carbonate, and the negative electrode material is graphite, PEO, PVDF and C65.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210151444.XA CN114583111A (en) | 2022-02-17 | 2022-02-17 | Preparation method of dry electrode capable of discharging continuously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210151444.XA CN114583111A (en) | 2022-02-17 | 2022-02-17 | Preparation method of dry electrode capable of discharging continuously |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114583111A true CN114583111A (en) | 2022-06-03 |
Family
ID=81770029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210151444.XA Pending CN114583111A (en) | 2022-02-17 | 2022-02-17 | Preparation method of dry electrode capable of discharging continuously |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114583111A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140030590A1 (en) * | 2012-07-25 | 2014-01-30 | Mingchao Wang | Solvent-free process based graphene electrode for energy storage devices |
| US20160181023A1 (en) * | 2013-08-26 | 2016-06-23 | Zeon Corporation | Method for producing granulated particles for electrochemical device, electrode for electrochemical device, and electrochemical device |
| CN111342053A (en) * | 2020-03-02 | 2020-06-26 | 太仓中科赛诺新能源科技有限公司 | Flexible integrated electrode plate and preparation method and application thereof |
| CN112038574A (en) * | 2020-08-31 | 2020-12-04 | 蜂巢能源科技有限公司 | Pole piece film and preparation method and application thereof |
| CN112289976A (en) * | 2020-10-28 | 2021-01-29 | 蜂巢能源科技有限公司 | Positive electrode material layer, preparation method thereof, positive plate and battery |
| CN113054155A (en) * | 2021-04-27 | 2021-06-29 | 昆山宝创新能源科技有限公司 | Preparation method of pole piece and lithium ion battery |
| CN113675362A (en) * | 2021-08-18 | 2021-11-19 | 蜂巢能源科技有限公司 | Method and system for preparing electrode slice by dry method and application |
| WO2022012357A1 (en) * | 2020-07-14 | 2022-01-20 | 华为技术有限公司 | Film for battery electrode and preparation method therefor |
-
2022
- 2022-02-17 CN CN202210151444.XA patent/CN114583111A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140030590A1 (en) * | 2012-07-25 | 2014-01-30 | Mingchao Wang | Solvent-free process based graphene electrode for energy storage devices |
| US20160181023A1 (en) * | 2013-08-26 | 2016-06-23 | Zeon Corporation | Method for producing granulated particles for electrochemical device, electrode for electrochemical device, and electrochemical device |
| CN111342053A (en) * | 2020-03-02 | 2020-06-26 | 太仓中科赛诺新能源科技有限公司 | Flexible integrated electrode plate and preparation method and application thereof |
| WO2022012357A1 (en) * | 2020-07-14 | 2022-01-20 | 华为技术有限公司 | Film for battery electrode and preparation method therefor |
| CN112038574A (en) * | 2020-08-31 | 2020-12-04 | 蜂巢能源科技有限公司 | Pole piece film and preparation method and application thereof |
| CN112289976A (en) * | 2020-10-28 | 2021-01-29 | 蜂巢能源科技有限公司 | Positive electrode material layer, preparation method thereof, positive plate and battery |
| CN113054155A (en) * | 2021-04-27 | 2021-06-29 | 昆山宝创新能源科技有限公司 | Preparation method of pole piece and lithium ion battery |
| CN113675362A (en) * | 2021-08-18 | 2021-11-19 | 蜂巢能源科技有限公司 | Method and system for preparing electrode slice by dry method and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107565086B (en) | Preparation method of battery plate | |
| CN112420986B (en) | Method for preparing positive and negative pole pieces of lithium battery by dry method | |
| CN108598560B (en) | Composite solid electrolyte and preparation method and application thereof | |
| CN101232091B (en) | Method for preparation of lithium ion battery anode glue size and battery | |
| CN106058307B (en) | A method of lithium ion battery anode material lithium iron phosphate is prepared using LiFePO4 waste material | |
| CN107910521B (en) | Ruthenium-modified carbon fluoride material, preparation and application | |
| CN213936237U (en) | Dry preparation equipment for lithium battery electrode | |
| CN110600797A (en) | Preparation method of polymer-inorganic composite electrolyte | |
| CN115621410B (en) | Preparation method of dry electrode slice, electrode slice and application thereof | |
| CN114229816B (en) | Method for recycling and preparing anode material from waste lithium iron phosphate battery | |
| CN108155360A (en) | A kind of method for preparing carbon coating nickel-cobalt lithium manganate cathode material | |
| CN113745640A (en) | High-power cylindrical lithium ion battery and processing technology | |
| WO2022179064A1 (en) | Solid electrolyte and application thereof | |
| CN106745251A (en) | A kind of preparation method and application for being suitable to the nanometer vanadic anhydride positive electrode of industrialized production | |
| WO2021098215A1 (en) | High-safety high-volume-energy-density quasi-solid-state lithium-ion battery and manufacturing method therefor | |
| CN114583111A (en) | Preparation method of dry electrode capable of discharging continuously | |
| CN108539221A (en) | A kind of lithium battery production technology | |
| CN113937354A (en) | Improved process for preparing solid electrolyte membrane | |
| CN113451643B (en) | In-situ preparation method and application of amide-based composite solid electrolyte | |
| CN112447960B (en) | Preparation method of silicon cathode and preparation method of lithium ion battery | |
| CN102201568B (en) | Method for preparing lithium ionic membrane electrode and application of lithium ionic membrane electrode in preparation of lithium ion battery | |
| CN115000499A (en) | Fluoride composite solid electrolyte membrane, preparation method thereof and solid sodium battery using fluoride composite solid electrolyte membrane | |
| CN112331847B (en) | Method for preparing high-electrochemical-activity lithium iron phosphate positive electrode material by using unqualified lithium iron phosphate positive electrode material | |
| CN113903983A (en) | Organic-inorganic composite solid electrolyte membrane, preparation method thereof and all-solid-state lithium battery using same | |
| CN111106313A (en) | Batch continuous pretreatment electrode device and method for electrochemically pretreating electrodes by using same |
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 |