CN113517436A - Continuous-rate lithium battery formula and sheet-making process thereof - Google Patents

Continuous-rate lithium battery formula and sheet-making process thereof Download PDF

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Publication number
CN113517436A
CN113517436A CN202110628681.6A CN202110628681A CN113517436A CN 113517436 A CN113517436 A CN 113517436A CN 202110628681 A CN202110628681 A CN 202110628681A CN 113517436 A CN113517436 A CN 113517436A
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negative electrode
positive electrode
lithium battery
battery
electrolyte
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陈海
魏学鹏
杨帅
崔晓童
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Jiangsu Jinlu New Energy Technology Co ltd
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Jiangsu Jinlu New Energy Technology Co ltd
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    • 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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • 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
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/621—Binders
    • H01M4/622—Binders being polymers
    • 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
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/431—Inorganic material
    • H01M50/434—Ceramics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/534—Electrode connections inside a battery casing characterised by the material of the leads or tabs
    • 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
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027—Negative electrodes
    • 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
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/028—Positive electrodes
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a formula of a continuous multiplying power lithium battery, which comprises an anode: S-P, GL6130, CNT and the balance of lithium cobaltate; negative electrode: S-P, CMC, SBR water system formula, the balance of carbon microspheres, and a diaphragm: 16+4 high pore ceramic membrane. A process for manufacturing a sustained-rate lithium battery sheet comprises the following steps: 1) the production method comprises the steps of proportioning, 2), coating, 3), rolling, 4), tab welding, 5), laminating, 6), packaging, 7), baking, 8), injecting, 9), forming and 10) packaging, wherein the capacity retention rate is more than 80% after 0.5C charging and 15C discharging at 25 +/-2 ℃.

Description

Continuous-rate lithium battery formula and sheet-making process thereof
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a lithium battery with continuous multiplying power.
Background
The general lithium ion battery can not support high discharge rate, and the high-rate discharge battery can not discharge for a long time. Patent 202011493526.X discloses a preparation method of a high-rate battery. Patent 201910775250.5 discloses a cylindrical high-rate battery. The above patent uses a winding process to produce the sheet, which has large internal resistance and small discharge current, and is difficult to discharge for a long time under the requirement of high power.
Disclosure of Invention
Technical problem to be solved
In order to solve the problems in the background art, the invention designs a lithium battery with continuous multiplying power and a sheet making process, and aims to: the problem of long-time long-cycle-rate discharge use of the lithium ion battery at 8-15 ℃ is solved.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
the formula of the continuous multiplying power lithium battery is characterized in that: the method comprises a positive electrode: 3.5% of S-P (conductive carbon black) +1.5% of GL6130 (polyvinylidene fluoride) +0.5% of CNT (carbon nanotube), the rest being lithium cobaltate; negative electrode: 3% of S-P (conductive carbon black) +1.5% of CMC sodium carboxymethyl cellulose) +3% of SBR (styrene butadiene rubber) water system formula, the rest is carbon microspheres, and a diaphragm: 16+4 high pore ceramic membrane.
The lithium cobaltate D50=6.0 +/-1 um, D10 is more than or equal to 1.0, D90 is less than or equal to 15.0, and the specific surface area is 0.50 +/-0.20 m2/g。
The carbon microspheres D50=8-13um, D10 =4-6um and D90=20-28um, and the specific surface area is less than or equal to 2.0 m2/g。
A process for preparing a sustained-rate lithium battery sheet is characterized by comprising the following steps: the method comprises the following steps:
1) and (3) preparing materials: preparing materials according to the material proportion of the formula, sieving and discharging for later use;
2) and coating: coating the material sieved and discharged in the step 1), and controlling the surface density of the positive electrode to be 100 g/m2Middle, negative electrode density 50g/m2(ii) a The width of the negative electrode is more than 2mm wider than that of the positive electrode in the coating size design, so that the positive electrode and the negative electrode cannot be in short circuit when the battery is impacted by short circuit.
3) And rolling: compacting the coated material for 3.55 times of the positive electrode and 1.45 times of the negative electrode of the roller;
4) and welding a tab: the negative electrode tab is plated with 0.2X 10X 30mm of copper nickel, and the positive electrode tab is plated with 0.2X 10X 40mm of aluminum-to-copper nickel;
5) and lamination: the assembly process uses a lamination process, and the positive electrode N and the negative electrode N +1 are adopted;
6) and packaging: wrapping the battery cell with an aluminum-plastic film;
7) and baking: baking out the water in the battery under the negative pressure of 80 ℃;
8) and injecting liquid: electrolyte is injected according to the injection amount of 3 g/Ah;
9) and formation: hot pressing at 50 deg.C under 0.15 kgf/m2The current is 0.2C, and the time is 3 h;
10) and packaging: excess electrolyte and gas are pumped out and the cell is sealed under negative pressure.
The electrolyte in the step 8) is gold light JEA515 electrolyte.
(III) advantageous effects
The invention provides a formula of a safe lithium battery and a flaking process thereof, and the safe lithium battery has the following beneficial effects:
1) the capacity retention rate of the invention is more than 80 percent at the temperature of 25 +/-2 ℃ after 0.5C is charged and discharged at 15C for 500 weeks.
2) The D50 carbon microsphere is uniform in particle, low in impedance and capable of conducting electricity better, so that continuous discharge of large current can be kept. The negative electrode is made of carbon microspheres with good rate, the diaphragm is made of materials with high liquid retention and rate, and the electrolyte ensures that the battery has good continuous circulation capacity in a high-rate discharge state.
3) The tab selected by the invention has wider width and thicker thickness, thereby being capable of bearing heavy current discharge, not easy to generate heat and keeping working for a longer time.
Drawings
The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. As is readily understood by those skilled in the art: these drawings are only for illustrating the technical solutions of the present invention and are not intended to limit the scope of the present invention. In the figure:
FIG. 1 is a data chart of the test of example 1 of the present 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 only a part of the embodiments of the present invention, and not all of the 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.
Example (b):
the formula of the continuous multiplying power lithium battery is characterized in that: the method comprises a positive electrode: 3.5% of S-P +1.5% of GL6130+0.5% of CNT, and the balance of lithium cobaltate; negative electrode: 3% of S-P +1.5% of CMC +3% of SBR water system formula, the balance of carbon microspheres, and a diaphragm: 16+4 high pore ceramic membrane.
The lithium cobaltate D50=6.0 +/-1 um, D10 is more than or equal to 1.0, D90 is less than or equal to 15.0, and the specific surface area is 0.50 +/-0.20 m2/g。
The carbon microspheres D50=8-13um, D10 =4-6um and D90=20-28um, and the specific surface area is less than or equal to 2.0 m2/g。
A process for preparing a sustained-rate lithium battery sheet is characterized by comprising the following steps: the method comprises the following steps:
1) and (3) preparing materials: preparing materials according to the material proportion of the formula, sieving and discharging for later use;
2) and coating: coating the material sieved and discharged in the step 1), and controlling the surface density of the positive electrode to be 100 g/m2Middle, negative electrode density 50g/m2(ii) a The width of the negative electrode is more than 2mm wider than that of the positive electrode in the coating size design, so that the positive electrode and the negative electrode cannot be in short circuit when the battery is impacted by short circuit.
3) And rolling: compacting the coated material for 3.55 times of the positive electrode and 1.45 times of the negative electrode of the roller;
4) and welding a tab: the negative electrode tab is plated with 0.2X 10X 30mm of copper nickel, and the positive electrode tab is plated with 0.2X 10X 40mm of aluminum-to-copper nickel;
5) and lamination: the assembly process uses a lamination process, and the positive electrode N and the negative electrode N +1 are adopted;
6) and packaging: wrapping the battery cell with an aluminum-plastic film;
7) and baking: baking out the water in the battery under the negative pressure of 80 ℃;
8) and injecting liquid: injecting electrolyte according to the injection amount of 3g/Ah, wherein the electrolyte is gold light JEA515 electrolyte;
9) and formation: hot pressing at 50 deg.C under 0.15 kgf/m2The current is 0.2C, and the time is 3 h;
10) and packaging: excess electrolyte and gas are pumped out and the cell is sealed under negative pressure.
The test graph of the battery obtained by the above example is shown in fig. 1. The invention discharges the diagram under the current of 15C (60A).
The design purpose is achieved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.
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. In view of the above, the present invention achieves the intended objects.

Claims (5)

1. The formula of the continuous multiplying power lithium battery is characterized in that: the method comprises a positive electrode: 3.5% of S-P (conductive carbon black) +1.5% of GL6130 (polyvinylidene fluoride) +0.5% of CNT (carbon nanotube), the rest being lithium cobaltate; negative electrode: 3% of S-P, 1.5% of CMC (sodium carboxymethyl cellulose), 3% of SBR (styrene butadiene rubber) water system formula and the balance of carbon microspheres; a diaphragm: 16+4 high pore ceramic membrane.
2. The formulation of a sustained rate lithium battery as claimed in claim 1, wherein: the lithium cobaltate D50=6.0 +/-1 um, D10 is more than or equal to 1.0, D90 is less than or equal to 15.0, and the specific surface area is 0.50 +/-0.20 m2/g。
3. The formulation of a sustained rate lithium battery as claimed in claim 1, wherein: the carbon microspheres D50=8-13um, D10 =4-6um and D90=20-28um, and the specific surface area is less than or equal to 2.0 m2/g。
4. A process for preparing a sustained-rate lithium battery sheet is characterized by comprising the following steps: the method comprises the following steps:
1) and (3) preparing materials: preparing materials according to the material proportion of the formula, sieving and discharging for later use;
2) and coating: coating the material sieved and discharged in the step 1), and controlling the surface density of the positive electrode to be 100 g/m2Middle, negative electrode density 50g/m2(ii) a The width of the negative electrode is more than 2mm wider than that of the positive electrode when the coating size is designed, so that the positive electrode and the negative electrode cannot be in short circuit when the battery is impacted by short circuit;
3) and rolling: compacting the coated material for 3.55 times of the positive electrode and 1.45 times of the negative electrode of the roller;
4) and welding a tab: the negative electrode tab is plated with 0.2X 10X 30mm of copper nickel, and the positive electrode tab is plated with 0.2X 10X 40mm of aluminum-to-copper nickel;
5) and lamination: the assembly process uses a lamination process, and the positive electrode N and the negative electrode N +1 are adopted;
6) and packaging: wrapping the battery cell with an aluminum-plastic film;
7) and baking: baking out the water in the battery under the negative pressure of 80 ℃;
8) and injecting liquid: electrolyte is injected according to the injection amount of 3 g/Ah;
9) and formation: hot pressing at 50 deg.C under 0.15 kgf/m2The current is 0.2C, and the time is 3 h;
10) and packaging: excess electrolyte and gas are pumped out and the cell is sealed under negative pressure.
5. The process for manufacturing a sustained-rate lithium battery according to claim 4, wherein: the electrolyte in the step 8) is gold light JEA515 electrolyte.
CN202110628681.6A 2021-06-07 2021-06-07 Continuous-rate lithium battery formula and sheet-making process thereof Pending CN113517436A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101510625A (en) * 2009-03-26 2009-08-19 西安瑟福能源科技有限公司 Ultra-high magnification lithium ion battery
US20150037681A1 (en) * 2012-03-26 2015-02-05 Kabushiki Kaisha Toshiba Negative electrode active material for nonaqueous electrolyte secondary battery, nonaqueous electrolyte secondary battery, and battery pack
CN107742723A (en) * 2017-08-31 2018-02-27 新余英泰能科技有限公司 A kind of preparation method of military super-low-temperature lithium-ion cell
CN109256524A (en) * 2017-07-15 2019-01-22 深圳格林德能源有限公司 A kind of fast charging type high multiplying power lithium ion battery and preparation method thereof
CN111029566A (en) * 2019-11-18 2020-04-17 淮北市锂动芯新能源科技有限公司 Quick-charging flexible-package lithium ion battery
CN211829000U (en) * 2020-03-18 2020-10-30 惠州亿纬创能电池有限公司 Aluminum-to-copper nickel-plated tab and battery
CN212571269U (en) * 2020-07-21 2021-02-19 上海卡耐新能源有限公司 Soft package lithium battery

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101510625A (en) * 2009-03-26 2009-08-19 西安瑟福能源科技有限公司 Ultra-high magnification lithium ion battery
US20150037681A1 (en) * 2012-03-26 2015-02-05 Kabushiki Kaisha Toshiba Negative electrode active material for nonaqueous electrolyte secondary battery, nonaqueous electrolyte secondary battery, and battery pack
CN109256524A (en) * 2017-07-15 2019-01-22 深圳格林德能源有限公司 A kind of fast charging type high multiplying power lithium ion battery and preparation method thereof
CN107742723A (en) * 2017-08-31 2018-02-27 新余英泰能科技有限公司 A kind of preparation method of military super-low-temperature lithium-ion cell
CN111029566A (en) * 2019-11-18 2020-04-17 淮北市锂动芯新能源科技有限公司 Quick-charging flexible-package lithium ion battery
CN211829000U (en) * 2020-03-18 2020-10-30 惠州亿纬创能电池有限公司 Aluminum-to-copper nickel-plated tab and battery
CN212571269U (en) * 2020-07-21 2021-02-19 上海卡耐新能源有限公司 Soft package lithium battery

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Application publication date: 20211019