WO2023280104A1 - Battery cell for lithium ion battery - Google Patents

Battery cell for lithium ion battery Download PDF

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Publication number
WO2023280104A1
WO2023280104A1 PCT/CN2022/103629 CN2022103629W WO2023280104A1 WO 2023280104 A1 WO2023280104 A1 WO 2023280104A1 CN 2022103629 W CN2022103629 W CN 2022103629W WO 2023280104 A1 WO2023280104 A1 WO 2023280104A1
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piece
active substance
anode
cathode
battery cell
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PCT/CN2022/103629
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French (fr)
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Thomas Gerhard Wilhelm DAMITZ
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Priority to JP2024600004U priority Critical patent/JP3247221U/en
Priority to US18/576,620 priority patent/US20240313258A1/en
Priority to CA3224848A priority patent/CA3224848A1/en
Priority to EP22836855.1A priority patent/EP4367735A4/en
Priority to KR2020247000018U priority patent/KR20240000417U/en
Publication of WO2023280104A1 publication Critical patent/WO2023280104A1/en
Anticipated expiration legal-status Critical
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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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • 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
    • H01M4/36—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
    • H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
    • 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
    • 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
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • H01M50/133—Thickness
    • 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
    • H01M2004/021—Physical characteristics, e.g. porosity, surface area
    • 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

Definitions

  • the present disclosure relates generally to a lithium ion battery, and more specifically to a battery cell for a lithium ion battery.
  • Rechargeable lithium ion batteries have been implemented as a power source into a wide variety of stationary and portable applications. Their structure and electrochemical reaction mechanism provide them with several desirable characteristics including a relatively high energy density, a relatively low internal resistance, a general non-appearance of any memory effect when compared to other types of rechargeable batteries, for example, nickel-cadmium batteries, and a low self-discharge rate. These characteristics have made lithium ion batteries the preferred mobile power source for portable consumer electronics such as laptop computers and cell phones.
  • a lithium ion battery comprises two or more battery cells.
  • Each battery cell comprises an anode piece, a cathode piece disposed opposite to the anode piece, a separator and an electrolyte disposed between the anode piece and the cathode piece, and a case encapsulating the anode piece, the cathode piece, the separator and the electrolyte.
  • the present disclosure provides a battery cell for a lithium ion battery, which comprises: an anode piece, the anode piece being coated with an active substance; a cathode piece disposed opposite to the anode piece, the cathode piece being coated with an active substance; a separator and an electrolyte disposed between the anode piece and the cathode piece; and a case encapsulating the anode piece, the cathode piece, the separator and the electrolyte, wherein a thickness of the active substance on the anode piece is 5-30 ⁇ m, and a thickness of the active substance on the cathode piece is 5-30 ⁇ m.
  • an areal density of the active substance on the anode piece is 10-30 g/m 2 .
  • an areal density of the active substance on the cathode piece is 10-30 g/m 2 .
  • an error range of the areal density of the active substance on the anode piece is +0.5%.
  • an error range of the areal density of the active substance on the cathode piece is +0.5%.
  • the active substance on the anode piece comprises one or more of lithium cobalt oxides, lithium nickel oxide, lithium manganese oxide, nickel cobalt manganese ternary material, nickel cobalt aluminum ternary material, and lithium iron phosphate.
  • the active substance on the cathode piece comprises one or more of graphite, silicon carbide, hard carbon, and lithium titanium oxide.
  • the present disclosure also provides a lithium ion battery comprising two or more said battery cells.
  • the amount of suction of active substances on the anode piece and the cathode piece is increased, the transmission distance of lithium ions between the anode and the cathode during the fast charging and discharging of the lithium ion battery is decreased, thereby reducing polarization of the lithium ion battery in the process of charging and discharging, and enhancing the fast charging and discharging ability of the lithium ion battery.
  • the error range of the areal density of the active substance on the anode piece or the cathode piece is +0.5%, the active substance interface reaction consistency in the lithium ion battery during charging and discharging process is increased, and uneven adsorption of electrolyte on the surfaces coated with the active substance is avoided, thereby increasing cycle life of the lithium ion battery.
  • Fig. 1 schematically shows a battery cell for a lithium ion battery in accordance with an embodiment of the present disclosure.
  • Fig. 1 schematically shows a battery cell 100 for a lithium ion battery in accordance with an embodiment of the present disclosure.
  • Two or more battery cells 100 may be assembled to form a lithium ion battery.
  • the battery cell 100 may comprise an anode piece 101, a cathode piece 102 disposed opposite to the anode piece 101, a separator 103 and an electrolyte 104 disposed between the anode piece 101 and the cathode piece 102.
  • the battery cell 100 may further comprise a case 105 encapsulating the anode piece 101, the cathode piece 102, the separator 103 and the electrolyte 104.
  • the anode piece 101 may be coated with an active substance and the cathode piece 102 may be coated with an active substance.
  • a thickness of the active substance on the anode piece 101 is 5-30 ⁇ m
  • a thickness of the active substance on the cathode piece 102 is 5-30 ⁇ m.
  • an areal density of the active substance on the anode piece 101 is 10-30 g/m 2 .
  • an areal density of the active substance on the cathode piece 102 is 10-30 g/m 2 .
  • an error range of the areal density of the active substance on the anode piece 101 is +0.5%.
  • an error range of the areal density of the active substance on the cathode piece 102 is +0.5%.
  • the active substance on the anode piece 101 may comprise one or more of lithium cobalt oxides, lithium nickel oxide, lithium manganese oxide, nickel cobalt manganese ternary material, nickel cobalt aluminum ternary material, and lithium iron phosphate.
  • the active substance on the cathode piece 102 may comprise one or more of graphite, silicon carbide, hard carbon, and lithium titanium oxide.
  • the present disclosure also provides a lithium ion battery comprising two or more said battery cells 100.
  • the amount of suction of active substances on the anode piece and the cathode piece is increased, the transmission distance of lithium ions between the anode and the cathode during the fast charging and discharging of the lithium ion battery is decreased, thereby reducing polarization of the lithium ion battery in the process of charging and discharging, and enhancing the fast charging and discharging ability of the lithium ion battery.
  • the error range of the areal density of the active substance on the anode piece or the cathode piece is +0.5%, the active substance interface reaction consistency in the lithium ion battery during charging and discharging process is increased, and uneven adsorption of electrolyte on the surfaces coated with the active substance is avoided, thereby increasing cycle life of the lithium ion battery.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

A battery cell(100) for a lithium ion battery is provided, which comprises: an anode piece(101), the anode piece(101) being coated with an active substance; a cathode piece(102) disposed opposite to the anode piece(101), the cathode piece(102) being coated with an active substance; a separator(103) and an electrolyte(104) disposed between the anode piece(101) and the cathode piece(102); and a case(105) encapsulating the anode piece(101), the cathode piece(102), the separator(103) and the electrolyte(104), wherein a thickness of the active substance on the anode piece(101) is 5-30μm, and a thickness of the active substance on the cathode piece(102) is 5-30μm. This disclosure also relates to a lithium ion battery comprising two or more said battery cells.

Description

Battery cell for lithium ion battery TECHNICAL FIELD
The present disclosure relates generally to a lithium ion battery, and more specifically to a battery cell for a lithium ion battery.
BACKGROUND
Rechargeable lithium ion batteries have been implemented as a power source into a wide variety of stationary and portable applications. Their structure and electrochemical reaction mechanism provide them with several desirable characteristics including a relatively high energy density, a relatively low internal resistance, a general non-appearance of any memory effect when compared to other types of rechargeable batteries, for example, nickel-cadmium batteries, and a low self-discharge rate. These characteristics have made lithium ion batteries the preferred mobile power source for portable consumer electronics such as laptop computers and cell phones.
Typically, a lithium ion battery comprises two or more battery cells. Each battery cell comprises an anode piece, a cathode piece disposed opposite to the anode piece, a separator and an electrolyte disposed between the anode piece and the cathode piece, and a case encapsulating the anode piece, the cathode piece, the separator and the electrolyte.
SUMMARY
The present disclosure provides a battery cell for a lithium ion battery, which comprises: an anode piece, the anode piece being coated with an active substance; a cathode piece disposed opposite to the anode piece, the cathode piece being coated with an active substance; a separator and an electrolyte disposed between the anode piece and the cathode piece; and a case encapsulating the anode piece, the cathode piece, the separator and the electrolyte, wherein a thickness of the active substance on the anode piece is 5-30 μm, and a thickness of the active substance on the cathode  piece is 5-30 μm.
In an embodiment, an areal density of the active substance on the anode piece is 10-30 g/m 2.
In an embodiment, an areal density of the active substance on the cathode piece is 10-30 g/m 2.
In an embodiment, an error range of the areal density of the active substance on the anode piece is +0.5%.
In an embodiment, an error range of the areal density of the active substance on the cathode piece is +0.5%.
In an embodiment, the active substance on the anode piece comprises one or more of lithium cobalt oxides, lithium nickel oxide, lithium manganese oxide, nickel cobalt manganese ternary material, nickel cobalt aluminum ternary material, and lithium iron phosphate.
In an embodiment, the active substance on the cathode piece comprises one or more of graphite, silicon carbide, hard carbon, and lithium titanium oxide.
The present disclosure also provides a lithium ion battery comprising two or more said battery cells.
In accordance with the present disclosure, due to the reduction of coating thicknesses of the anode piece and the cathode piece, the amount of suction of active substances on the anode piece and the cathode piece is increased, the transmission distance of lithium ions between the anode and the cathode during the fast charging and discharging of the lithium ion battery is decreased, thereby reducing polarization of the lithium ion battery in the process of charging and discharging, and enhancing the fast charging and discharging ability of the lithium ion battery.
In accordance with the present disclosure, since the error range of the areal density of the active substance on the anode piece or the cathode piece is +0.5%, the active substance interface reaction consistency in the lithium ion battery during charging and discharging process is increased, and uneven adsorption of electrolyte on the surfaces coated with the active substance is avoided, thereby increasing cycle life of the lithium ion  battery.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 schematically shows a battery cell for a lithium ion battery in accordance with an embodiment of the present disclosure.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Fig. 1 schematically shows a battery cell 100 for a lithium ion battery in accordance with an embodiment of the present disclosure. Two or more battery cells 100 may be assembled to form a lithium ion battery. As shown in Fig. 1, the battery cell 100 may comprise an anode piece 101, a cathode piece 102 disposed opposite to the anode piece 101, a separator 103 and an electrolyte 104 disposed between the anode piece 101 and the cathode piece 102. The battery cell 100 may further comprise a case 105 encapsulating the anode piece 101, the cathode piece 102, the separator 103 and the electrolyte 104.
In accordance with an embodiment of the present disclosure, the anode piece 101 may be coated with an active substance and the cathode piece 102 may be coated with an active substance.
In an embodiment, a thickness of the active substance on the anode piece 101 is 5-30 μm
In an embodiment, a thickness of the active substance on the cathode piece 102 is 5-30 μm.
In an embodiment, an areal density of the active substance on the anode piece 101 is 10-30 g/m 2.
In an embodiment, an areal density of the active substance on the cathode piece 102 is 10-30 g/m 2.
In an embodiment, an error range of the areal density of the active substance on the anode piece 101 is +0.5%.
In an embodiment, an error range of the areal density of the active substance on the cathode piece 102 is +0.5%.
In an embodiment, the active substance on the anode piece 101 may  comprise one or more of lithium cobalt oxides, lithium nickel oxide, lithium manganese oxide, nickel cobalt manganese ternary material, nickel cobalt aluminum ternary material, and lithium iron phosphate.
In an embodiment, the active substance on the cathode piece 102 may comprise one or more of graphite, silicon carbide, hard carbon, and lithium titanium oxide.
The present disclosure also provides a lithium ion battery comprising two or more said battery cells 100.
In accordance with the present disclosure, due to the reduction of coating thicknesses of the anode piece and the cathode piece, the amount of suction of active substances on the anode piece and the cathode piece is increased, the transmission distance of lithium ions between the anode and the cathode during the fast charging and discharging of the lithium ion battery is decreased, thereby reducing polarization of the lithium ion battery in the process of charging and discharging, and enhancing the fast charging and discharging ability of the lithium ion battery.
In accordance with the present disclosure, since the error range of the areal density of the active substance on the anode piece or the cathode piece is +0.5%, the active substance interface reaction consistency in the lithium ion battery during charging and discharging process is increased, and uneven adsorption of electrolyte on the surfaces coated with the active substance is avoided, thereby increasing cycle life of the lithium ion battery.
Although a number of embodiments of this disclosure have been described, a person of ordinary skill in the art would recognize that certain modifications would come within the scope of this disclosure. For that reason, the appended claims should be studied to determine the true scope and content of this disclosure.

Claims (8)

  1. A battery cell for a lithium ion battery, comprising:
    an anode piece, the anode piece being coated with an active substance;
    a cathode piece disposed opposite to the anode piece, the cathode piece being coated with an active substance;
    a separator and an electrolyte disposed between the anode piece and the cathode piece; and
    a case encapsulating the anode piece, the cathode piece, the separator and the electrolyte,
    wherein a thickness of the active substance on the anode piece is 5-30 μm, and a thickness of the active substance on the cathode piece is 5-30 μm.
  2. The battery cell of claim 1, wherein an areal density of the active substance on the anode piece is 10-30 g/m 2.
  3. The battery cell of claim 1, wherein an areal density of the active substance on the cathode piece is 10-30 g/m 2.
  4. The battery cell of claim 2, wherein an error range of the areal density of the active substance on the anode piece is ±0.5%.
  5. The battery cell of claim 3, wherein an error range of the areal density of the active substance on the cathode piece is ±0.5%.
  6. The battery cell of claim 1, wherein the active substance on the anode piece comprises one or more of lithium cobalt oxides, lithium nickel oxide, lithium manganese oxide, nickel cobalt manganese ternary material, nickel cobalt aluminum ternary material, and lithium iron phosphate.
  7. The battery cell of claim 1, wherein the active substance on the cathode piece comprises one or more of graphite, silicon carbide, hard carbon, and lithium titanium oxide.
  8. A lithium ion battery, comprising two or more battery cells of any of claims 1-7.
PCT/CN2022/103629 2021-07-05 2022-07-04 Battery cell for lithium ion battery Ceased WO2023280104A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2024600004U JP3247221U (en) 2021-07-05 2022-07-04 Lithium-ion battery cells
US18/576,620 US20240313258A1 (en) 2021-07-05 2022-07-04 Battery cell for lithium ion battery
CA3224848A CA3224848A1 (en) 2021-07-05 2022-07-04 Battery cell for lithium ion battery
EP22836855.1A EP4367735A4 (en) 2021-07-05 2022-07-04 BATTERY CELL FOR LITHIUM-ION BATTERY
KR2020247000018U KR20240000417U (en) 2021-07-05 2022-07-04 Battery cells for lithium-ion batteries

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CN216597640U (en) * 2021-07-05 2022-05-24 托马斯·吉哈德·维尔海姆·达米兹 Lithium ion battery
CN115347147A (en) * 2022-08-03 2022-11-15 广西华桂兴时代新能源科技股份有限公司 Positive plate with adsorbing material and non-deformable secondary battery

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