WO2023248006A1 - 全固体電池セル - Google Patents

全固体電池セル Download PDF

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Publication number
WO2023248006A1
WO2023248006A1 PCT/IB2023/000260 IB2023000260W WO2023248006A1 WO 2023248006 A1 WO2023248006 A1 WO 2023248006A1 IB 2023000260 W IB2023000260 W IB 2023000260W WO 2023248006 A1 WO2023248006 A1 WO 2023248006A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cell
solid
exterior body
state battery
shape
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.)
Ceased
Application number
PCT/IB2023/000260
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
達朗 佐々木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault SAS
Nissan Motor Co Ltd
Original Assignee
Renault SAS
Nissan Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Renault SAS, Nissan Motor Co Ltd filed Critical Renault SAS
Priority to EP23825379.3A priority Critical patent/EP4546497A4/en
Priority to CN202380045768.8A priority patent/CN119836705A/zh
Priority to JP2024527876A priority patent/JP7852715B2/ja
Publication of WO2023248006A1 publication Critical patent/WO2023248006A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • 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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • H01M50/136—Flexibility or foldability
    • 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
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/474—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
    • 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
    • H01M50/471—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof
    • H01M50/477—Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their shape
    • 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
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
    • H01M10/0562—Solid materials
    • 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
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
    • 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

Definitions

  • the present invention relates to an all-solid-state battery cell.
  • Patent Document 1 JP2017-117696A.
  • Patent Document 1 describes a method for manufacturing an all-solid-state battery that can improve the volumetric energy density while suppressing the occurrence of wrinkles in the exterior body at the portion that contacts the surface of the stack in the stacking direction.
  • This document describes a step of arranging the laminate in the outer case, a step of sealing the peripheral edge of the laminate placed in the outer case in a reduced pressure atmosphere, and a step of applying pressure while maintaining the reduced pressure atmosphere after the sealing step.
  • the laminate placed inside the exterior body is sealed in a reduced pressure atmosphere, so the exterior body is in close contact with the laminate. That is, no space is substantially formed between the exterior body and the laminate.
  • an all-solid-state battery a battery that uses metallic lithium as a negative electrode active material is known.
  • the temperature may reach such a level that metallic lithium melts.
  • molten lithium may flow out.
  • Patent Document 1 if there is no space between the exterior body and the laminate, there is a possibility that molten lithium leaks to the outside.
  • an object of the present invention is to provide an all-solid-state battery cell in which lithium does not leak to the outside even when lithium melts.
  • the all-solid-state battery cell according to the present invention includes an electrode laminate, an exterior body, and a pair of shape-retaining materials.
  • the electrode stack includes a positive electrode, a solid electrolyte layer, and a negative electrode, and is configured to use metallic lithium as a negative electrode active material.
  • the exterior body has flexibility and accommodates the electrode stack.
  • the pair of shape-retaining members are provided in the exterior body so as to be located at both ends of the electrode stack in the stacking direction. The pair of shape-retaining members maintain the shape of the exterior body so that a space is secured between the exterior body and the electrode stack even when the internal region of the exterior body is depressurized.
  • Each of the pair of shape-retaining members has a flat plate portion and a side portion coupled to an end portion of the flat plate portion.
  • the flat plate portion is arranged at the end of the electrode stack in the stacking direction.
  • the outer shape of the flat plate portion is larger than the outer shape of the electrode stack.
  • the end surface of the side surface of one shape-retaining material and the end surface of the other shape-retaining material are opposed to each other.
  • FIG. 1 is a schematic cross-sectional view showing an all-solid-state battery module according to a first embodiment.
  • FIG. 2 is a cross-sectional view and a top view schematically showing the configuration of a battery cell.
  • FIG. 3 is a schematic cross-sectional view showing the structure of a battery cell when metallic lithium is melted.
  • FIG. 4 is a schematic cross-sectional view showing a battery cell according to the second embodiment.
  • FIG. 5 is a schematic cross-sectional view showing a battery cell according to the third embodiment.
  • FIG. 6 is a cross-sectional view and a top view schematically showing a battery cell according to a fourth embodiment.
  • FIG. 1 is a schematic cross-sectional view showing an all-solid-state battery module 9 using an all-solid-state battery cell 1 (hereinafter sometimes simply referred to as battery cell 1) according to the present embodiment.
  • the all-solid-state battery module 9 includes a plurality of battery cells 1 and a pair of end plates 8.
  • the plurality of battery cells 1 are stacked.
  • a pair of end plates 8 are arranged to sandwich the plurality of stacked battery cells 1 in the stacking direction.
  • the pair of end plates 8 are compressed by a pressure mechanism (not shown). As a result, a compressive load is applied to the plurality of battery cells 1.
  • each battery cell 1 is devised.
  • the configuration of the battery cell 1 will be explained below.
  • FIG. 2 is a cross-sectional view (a) and a top view (b) schematically showing the configuration of the battery cell 1.
  • FIG. 3 is a schematic cross-sectional view showing the structure of the battery cell 1 when lithium is melted.
  • the battery cell 1 includes an electrode laminate 2, an exterior body 3, a pair of shape retainers (4a and 4b), and current collector tabs (6-1 and 6-2).
  • the electrode laminate 2 is arranged within the exterior body 3.
  • the electrode stack 2 is configured to use metallic lithium as a negative electrode active material.
  • a pair of shape retaining members (4a and 4b) are also arranged within the exterior body 3.
  • the pair of shape retaining members (4a and 4b) maintain the shape of the exterior body 3 so that the exterior body 3 does not come into close contact with the electrode stack 2 even if the internal region of the exterior body 3 is depressurized. That is, a space is ensured between the exterior body 3 and the electrode stack 2. Specifically, a space is secured on both sides of the electrode stack 2 in the direction connecting the current collecting tabs 6-1 and 6-2.
  • the electrode stack 2 has a structure in which a plurality of units are stacked. Each unit has a positive electrode, a solid electrolyte layer, and a negative electrode. The solid electrolyte layer is sandwiched between a positive electrode and a negative electrode. Further, as described above, the electrode stack 2 is configured to use metallic lithium as the negative electrode active material. In such an electrode stack 2, when the temperature reaches an extremely high temperature, lithium may melt and leak from the electrode stack 2, as described above.
  • a current collector (5-1 or 5-2) is sandwiched between adjacent units.
  • One of the current collectors 5-1 and 5-2 is a positive electrode current collector, and the other is a negative electrode current collector.
  • a plurality of current collectors (5-1 and 5-2) are provided.
  • the current collectors (5-1 and 5-2) each protrude from the side surface of the electrode stack 2, are brought together at their ends, and are connected to the current collector tabs (6-1 and 6-2). It is connected.
  • the current collecting tab 6-1 and the current collecting tab 6-2 are provided to electrically connect the electrode stack 2 to the outside.
  • One end of each current collector tab (6-1 and 6-2) is arranged inside the exterior body 3, and the other end is arranged outside the exterior body 3.
  • the material of the exterior body 3 is not particularly limited, but for example, aluminum film or the like can be used.
  • the total length (a1+a2) of the side surfaces (4a-2 and 4b-2) is set to be the same as the thickness of the electrode stack 2 when the SOC is 0%.
  • the term "identical” as used herein is a concept that includes substantially the same.
  • the size of the surplus space formed inside the exterior body 3 is larger than the volume when the metallic lithium present in the fully charged state is melted.
  • the volume V Li (cm 3 ) of the molten metal lithium can be calculated using the following formula.
  • the battery cell 1 includes an electrode laminate 2, an exterior body 3, and a pair of insulating shape-retaining materials (4a and 4b).
  • the electrode stack includes a positive electrode, a solid electrolyte layer, and a negative electrode, and is configured to use metallic lithium as a negative electrode active material.
  • the exterior body 3 has flexibility and accommodates the electrode stack 2.
  • a pair of shape-retaining members (4a and 4b) are provided within the exterior body 3 so as to be located at both outermost ends of the electrode stack 2 in the stacking direction. Further, the pair of shape-retaining members (4a and 4b) are arranged in the exterior body so that a space is secured between the exterior body 3 and the electrode stack 2 even when the internal area of the exterior body 3 is depressurized. Hold the shape of 3.
  • FIG. 4 is a schematic cross-sectional view showing a battery cell 1 according to the second embodiment.
  • the exterior body 3 and each flat plate part (4a-1 and 4b-1) are bonded together.
  • the bonded portions are shown as bonded portions (10a-1 and 10b-1). According to such a configuration, even when the battery cell 1 is pressurized, the exterior body 3 and the flat plate portions (4a-1 and 4b-1) do not slip. Therefore, the exterior body 3 is less likely to be wrinkled.
  • FIG. 5 is a schematic cross-sectional view showing a battery cell 1 according to the third embodiment.
  • a gap is provided between the side surface portion 4a-2 and the side surface portion 4b-2 (the gap may be closed during complete discharge). That is, the total length of the side surface portions (4a-2 and 4b-2) along the stacking direction is equal to or less than the thickness of the electrode stack 2 when the SOC is 0%.
  • each shape retaining material (4a and 4b) does not interfere with the electrode stack 2.
  • the upper and lower surfaces of the electrode stack 2 come into direct contact with the exterior body 3.
  • the positions of the outer surfaces of each shape-retaining material (4a and 4b) in the thickness direction are aligned with the positions of the upper and lower surfaces of the electrode stack 2. Therefore, despite the provision of the pair of shape retaining members (4a and 4b), the thickness of the battery cell 1 in the stacking direction does not increase. Therefore, the volumetric energy density is not impaired.

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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)
  • Sealing Battery Cases Or Jackets (AREA)
  • Secondary Cells (AREA)
PCT/IB2023/000260 2022-06-22 2023-05-12 全固体電池セル Ceased WO2023248006A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP23825379.3A EP4546497A4 (en) 2022-06-22 2023-05-12 FULLY SOLID BATTERY CELL
CN202380045768.8A CN119836705A (zh) 2022-06-22 2023-05-12 全固态电池单元
JP2024527876A JP7852715B2 (ja) 2022-06-22 2023-05-12 全固体電池セル

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-100726 2022-06-22
JP2022100726 2022-06-22

Publications (1)

Publication Number Publication Date
WO2023248006A1 true WO2023248006A1 (ja) 2023-12-28

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ID=89379213

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2023/000260 Ceased WO2023248006A1 (ja) 2022-06-22 2023-05-12 全固体電池セル

Country Status (4)

Country Link
EP (1) EP4546497A4 (https=)
JP (1) JP7852715B2 (https=)
CN (1) CN119836705A (https=)
WO (1) WO2023248006A1 (https=)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008140633A (ja) * 2006-11-30 2008-06-19 Nissan Motor Co Ltd 双極型二次電池のモジュール構造
JP2017117696A (ja) 2015-12-25 2017-06-29 トヨタ自動車株式会社 全固体電池の製造方法
JP2019057436A (ja) * 2017-09-21 2019-04-11 日立造船株式会社 全固体電池およびその製造方法
KR20200039586A (ko) * 2018-10-05 2020-04-16 주식회사 유뱃 집전체가 노출된 전기화학소자 및 이의 제조방법
WO2021124695A1 (ja) * 2019-12-20 2021-06-24 パナソニックＩｐマネジメント株式会社 電池
JP2021174621A (ja) * 2020-04-22 2021-11-01 パナソニックＩｐマネジメント株式会社 電池及びその製造方法
JP2022100726A (ja) 2020-12-24 2022-07-06 株式会社クボタ 電子制御装置、作業車両および入力回路

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6987569B2 (ja) 2017-08-09 2022-01-05 三菱重工業株式会社 全固体電池モジュール

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008140633A (ja) * 2006-11-30 2008-06-19 Nissan Motor Co Ltd 双極型二次電池のモジュール構造
JP2017117696A (ja) 2015-12-25 2017-06-29 トヨタ自動車株式会社 全固体電池の製造方法
JP2019057436A (ja) * 2017-09-21 2019-04-11 日立造船株式会社 全固体電池およびその製造方法
KR20200039586A (ko) * 2018-10-05 2020-04-16 주식회사 유뱃 집전체가 노출된 전기화학소자 및 이의 제조방법
WO2021124695A1 (ja) * 2019-12-20 2021-06-24 パナソニックＩｐマネジメント株式会社 電池
JP2021174621A (ja) * 2020-04-22 2021-11-01 パナソニックＩｐマネジメント株式会社 電池及びその製造方法
JP2022100726A (ja) 2020-12-24 2022-07-06 株式会社クボタ 電子制御装置、作業車両および入力回路

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4546497A4

Also Published As

Publication number Publication date
JP7852715B2 (ja) 2026-04-28
CN119836705A (zh) 2025-04-15
EP4546497A1 (en) 2025-04-30
EP4546497A4 (en) 2025-12-17
JPWO2023248006A1 (https=) 2023-12-28

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