JP7471304B2 - 電池 - Google Patents
電池 Download PDFInfo
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- JP7471304B2 JP7471304B2 JP2021537613A JP2021537613A JP7471304B2 JP 7471304 B2 JP7471304 B2 JP 7471304B2 JP 2021537613 A JP2021537613 A JP 2021537613A JP 2021537613 A JP2021537613 A JP 2021537613A JP 7471304 B2 JP7471304 B2 JP 7471304B2
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- 238000007789 sealing Methods 0.000 claims description 112
- 238000003466 welding Methods 0.000 claims description 22
- 239000010410 layer Substances 0.000 description 15
- 239000000203 mixture Substances 0.000 description 15
- 239000003792 electrolyte Substances 0.000 description 14
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- 239000002002 slurry Substances 0.000 description 14
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 238000003780 insertion Methods 0.000 description 12
- 230000037431 insertion Effects 0.000 description 12
- 239000007774 positive electrode material Substances 0.000 description 12
- 239000007773 negative electrode material Substances 0.000 description 10
- 239000011241 protective layer Substances 0.000 description 9
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- 239000006258 conductive agent Substances 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241000156302 Porcine hemagglutinating encephalomyelitis virus Species 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 239000013528 metallic particle Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- SOXUFMZTHZXOGC-UHFFFAOYSA-N [Li].[Mn].[Co].[Ni] Chemical compound [Li].[Mn].[Co].[Ni] SOXUFMZTHZXOGC-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
-
- 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
- H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
- H01M50/176—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for prismatic or rectangular 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
- H01M50/10—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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/28—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
- H01M10/24—Alkaline accumulators
- H01M10/28—Construction or manufacture
- H01M10/286—Cells or batteries with wound or folded electrodes
-
- 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
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
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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
- 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
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
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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
- 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
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
-
- 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
- H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
-
- 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
-
- 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
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
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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
- 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
- H01M50/543—Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
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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)
- Connection Of Batteries Or Terminals (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Description
実施形態に係る二次電池としての角形二次電池20の構成を以下に説明する。なお、本発明は、以下の実施形態に限定されない。
まず、正極板4の製造方法を説明する。
例えば正極活物質と、導電剤と、結着剤とを混練して作成する。正極活物質としては、例えば、リチウムニッケルコバルトマンガン複合酸化物等のリチウム複合酸化物等が挙げられる。結着剤としては、例えば、ポリフッ化ビニリデン(PVdF)等のフッ素樹脂等が挙げられる。導電剤としては、カーボンブラック等の炭素材料等が挙げられる。
アルミナ粉末、導電剤としての黒鉛、結着剤としてのポリフッ化ビニリデン(PVdF)と分散媒としてのN-メチル-2-ピロリドン(NMP)などを混練し、保護層スラリーを作製する。
正極芯体としての厚さ15μmのアルミニウム箔の両面に、上述の方法で作製した正極活物質合剤層スラリー及び正極保護層スラリーをダイコータにより塗布する。また、正極活物質合剤層スラリーが塗布される領域の幅方向の少なくともどちらか一方の端部に正極保護層スラリーが塗布されるようにする。
次に、負極板5の製造方法を説明する。
負極活物質と、導電剤と、結着剤と、増粘剤を混練して作成。負極活物質としては、例えば、黒鉛等の炭素材料等が挙げられる。結着剤としては、例えば、スチレンブタジエンゴム(SBR)等が挙げられる。増粘剤としては、例えば、カルボキシメチルセルロース(CMC)等が挙げられる。
負極芯体としての厚さ8μmの銅箔の両面に、上述の方法で作製した負極活物質合剤層スラリーをダイコータにより塗布する。
上述の方法で作製した複数の正極板4及び負極板5を、セパレータを介して積層し、積層型の電極体3を製造する。電極体3に含まれる正極板4及び負極板5のそれぞれの数は特に限定されないが、数十枚以上が好ましい。詳しくは、第1電極体要素3aと第2電極体要素3bとを電極体3として作製する。
そして、図8に示すように、第1電極体要素3aの第1正極タブ群40A1及び第2電極体要素3bの第2正極タブ群40A2を、図6に示す第1正極集電体6a(正極集電体6)の主板部6dの一方の面に溶接するとともに、第1電極体要素3aの第1負極タブ群50A1及び第2電極体要素3bの第2負極タブ群50A2を、図7に示す第1負極集電体8a(負極集電体8)の第1板状部8dの一方の面に溶接する。
図9は、各部品を取り付けた封口板2の電池内部側の面を示す図である。図2及び図9を用いて、封口板2への各部品取り付けについて説明を行う。
図10は、第2正極集電体6bに第1正極集電体6aを取り付け、第2負極集電体8bに第1負極集電体8aを取り付けた後の封口板2の電池内部側の面を示す図である。
次に図12における第1電極体要素3aの上面と第2電極体要素3bの上面とが直接ないし他の部材を介して接するように二つの正極タブ群40A1,40A2及び二つの負極タブ群50A1,50A2を湾曲させる。これにより、二つの電極体要素3a,3bを纏めて1つの電極体3とする。そして、まとめた電極体3を、箱状ないし袋状に成形した絶縁シートからなる電極体ホルダー14内に配置する。
上述の実施形態は本願発明の例示であって、本願発明はこれらの例に限定されず、これらの例に周知技術や慣用技術、公知技術を組み合わせたり、一部置き換えたりしてもよい。また当業者であれば容易に思いつく改変発明も本願発明に含まれる。
2 封口板
3 電極体
4 正極板
5 負極板
6 正極集電体
7 正極端子
8 負極集電体
8a 第1負極集電体
8b 第2負極集電体
9 負極端子
13 内部側絶縁部材
40 正極タブ(タブ部)
50 負極タブ(タブ部)
81 第1のテープ(電極体側被覆部材)
82 第2のテープ(封口板側被覆部材)
84 第4のテープ(電極体側被覆部材)
85 第5のテープ(封口板側被覆部材)
FRE 平坦領域
RE1 第1領域
RE2 第2領域
Claims (4)
- 正極板と負極板とがセパレータを介して積層され、かつ前記正極板及び前記負極板の少なくとも一方にタブ部が設けられた電極体と、
開口を有し、前記電極体を収容する外装体と、
前記開口を封口する封口板と、
前記封口板に取り付けられた外部端子と、
前記電極体と前記封口板との間に前記封口板と略平行に配置され、かつ前記外部端子に電気的に接続された略板状の集電体とを備えた電池であって、
前記集電体の電極体側の面には、前記電極体のタブ部が溶接され、
前記集電体の封口板側の面における前記タブ部の溶接領域の裏側に相当する領域が、封口板側被覆部材によって覆われており、
前記封口板には、内部側絶縁部材が固定され、当該内部側絶縁部材の電極体側の面には、平坦な平坦領域が形成され、
前記集電体は、
封口板側の面に第1領域、及び当該第1領域よりも電極体側に位置する第2領域が形成された略板状の第1集電体と、
前記第1集電体の第2領域に溶接された略板状の第2集電体と、
を備え、
前記第2集電体の厚さは、前記第1集電体の第1領域及び第2領域の段差と、前記封口板側被覆部材の厚さとの合計よりも大きく設定され、
前記第1集電体の第1領域が前記封口板側被覆部材によって覆われ、
前記第2集電体の封口板側の面が前記内部側絶縁部材の平坦領域に当接している一方、前記第2集電体の電極体側の面が前記第1集電体の第2領域に当接していることを特徴とする電池。 - 請求項1に記載の電池において、
前記タブ部における前記集電体との溶接部分が、電極体側被覆部材によって覆われていることを特徴とする電池。 - 請求項2に記載の電池において、
前記電極体側被覆部材は粘着性を有することを特徴とする電池。 - 請求項1から3のいずれか1項に記載の電池において、
前記封口板側被覆部材は粘着性を有することを特徴とする電池。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019145421 | 2019-08-07 | ||
JP2019145421 | 2019-08-07 | ||
PCT/JP2020/024536 WO2021024630A1 (ja) | 2019-08-07 | 2020-06-23 | 電池 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2021024630A1 JPWO2021024630A1 (ja) | 2021-02-11 |
JP7471304B2 true JP7471304B2 (ja) | 2024-04-19 |
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Application Number | Title | Priority Date | Filing Date |
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JP2021537613A Active JP7471304B2 (ja) | 2019-08-07 | 2020-06-23 | 電池 |
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US (1) | US20220302534A1 (ja) |
EP (1) | EP4012831A4 (ja) |
JP (1) | JP7471304B2 (ja) |
CN (1) | CN114175317A (ja) |
WO (1) | WO2021024630A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114614209A (zh) * | 2022-03-26 | 2022-06-10 | 珠海冠宇电池股份有限公司 | 电池 |
Citations (3)
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