WO2022242228A1 - Batterie - Google Patents

Batterie Download PDF

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Publication number
WO2022242228A1
WO2022242228A1 PCT/CN2022/074623 CN2022074623W WO2022242228A1 WO 2022242228 A1 WO2022242228 A1 WO 2022242228A1 CN 2022074623 W CN2022074623 W CN 2022074623W WO 2022242228 A1 WO2022242228 A1 WO 2022242228A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding groove
negative electrode
metal shell
battery
welding
Prior art date
Application number
PCT/CN2022/074623
Other languages
English (en)
Chinese (zh)
Inventor
李琼源
陶芝勇
赵映军
章勇
刘惠君
Original Assignee
深圳市拓邦锂电池有限公司
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 深圳市拓邦锂电池有限公司 filed Critical 深圳市拓邦锂电池有限公司
Priority to CN202280024731.2A priority Critical patent/CN117099257A/zh
Publication of WO2022242228A1 publication Critical patent/WO2022242228A1/fr

Links

Classifications

    • 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
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
    • 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
    • H01M50/543—Terminals
    • H01M50/545—Terminals formed by the casing of 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • 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 invention relates to the technical field of batteries.
  • Traditional batteries usually include a metal shell and a battery cell set in the metal shell, such as a cylindrical battery, whether it is a small battery of 18650, a medium battery of 40140 or a large battery of 63280, the negative electrode of the battery is generally center spot welded. Weld the metal shell with the welding needle.
  • the welding needle is generally copper needle or aluminum oxide copper needle, or there is a tungsten steel head at the welding position of the copper needle. Due to the small contact area of this method, the conductivity is also small, and it needs to be carried out. Improve.
  • the technical problem to be solved by the present invention is to provide an improved battery for the above-mentioned defects in the related art.
  • the technical solutions adopted by the present invention to solve the technical problems include: providing a battery, including a metal case, an electric cell disposed in the metal case, and a battery disposed at the bottom of the metal case and below the electric cell Negative electrode bus piece, the metal shell covers the side and bottom surface of the battery core, the bottom of the metal shell is provided with a first welding groove, the negative electrode bus piece is provided with an electrode part and a second welding groove, and the metal shell The bottom is welded to the negative busbar through the first welding groove, the electrode part is welded to the bottom of the metal shell, and the negative busbar is welded to the negative electrode of the cell through the second welding groove.
  • the bottom of the metal shell is provided with a sunken portion that sinks downward, and the electrode portion on the negative electrode bus piece protrudes downward and is in contact with the sunken portion.
  • the first welding groove surrounds the periphery of the electrode part.
  • the first welding groove surrounds the periphery of the second welding groove, and the positions of the first welding groove and the second welding groove do not overlap.
  • the first welding groove is provided on the lower side of the bottom of the metal shell, protrudes upwards and contacts the negative electrode bus piece.
  • the second welding groove is provided on the lower side of the negative electrode bus piece, and is in the shape of a strip, a ring or a polygon.
  • the number of the second welding grooves is at least two and are respectively provided on both sides of the electrode part, and each of the second welding grooves is elongated.
  • the second welding groove is in the form of a ring around the periphery of the electrode part.
  • the metal shell is cylindrical.
  • the battery realizes the electrical connection between the battery core and the steel shell through the negative busbar
  • the metal shell is provided with a first welding groove on the lower side of the upper bottom
  • the negative busbar is provided with an electrode
  • the inner part and the second welding groove increase the contact area between the steel shell and the negative electrode bus piece, increase the conduction capacity, make the battery have smaller internal resistance and discharge temperature rise, better guarantee the battery performance, and improve customer satisfaction.
  • FIG. 1 is a sectional view taken along an axis of a battery according to an embodiment of the present invention.
  • Fig. 2 is a partially enlarged view of part A in Fig. 1 .
  • FIG. 3 is a perspective view of an embodiment of a negative bus tab of the battery of FIG. 1 .
  • FIG. 4 is a perspective view of another embodiment of the negative bus tab of the battery of FIG. 1 .
  • Fig. 5 is a battery performance comparison table between the battery of the present invention and the traditional spot-welded metal shell battery mentioned in the background art.
  • the reference numerals in the figure indicate: metal shell 1 , sinking portion 11 , first welding groove 12 , negative electrode bus piece 2 , electrode portion 21 , second welding groove 22 , and battery core 3 .
  • a battery in one embodiment of the present invention includes a metal case 1 , a cell 3 disposed in the metal case 1 , and a negative electrode collector disposed at the bottom of the metal case 1 and below the cell 3 Sheet 2, the metal shell 1 covers the side and bottom of the battery cell 3, the bottom of the metal shell 1 is provided with a first welding groove 12, the negative electrode bus piece 2 is provided with an electrode part 21 and a second welding groove 22, the metal shell 1
  • the bottom is welded to the negative electrode bus piece 2 through the first welding groove 12, specifically laser spot welding; the electrode part 21 of the negative electrode bus piece 2 is welded to the bottom of the metal shell 1, specifically resistance welding can be used; the negative electrode bus piece 2 is welded through the second welding
  • the slot 22 is welded to the negative electrode of the battery cell 3 , and may be welded to the negative electrode current collector of the battery cell 3 .
  • the battery of the present invention realizes the electrical connection between the battery core 3 and the steel shell through the negative electrode bus piece 2.
  • the metal shell 1 is provided with a first welding groove 12 on the upper bottom and lower side, and the negative electrode bus piece 2 is provided with an electrode part 21 and a second welding groove.
  • the groove 22 increases the contact area between the steel shell and the negative electrode bus piece 2, increases the conduction capacity, makes the battery have smaller internal resistance and discharge temperature rise, better guarantees battery performance, and improves customer satisfaction.
  • the metal shell 1 is integrally formed and may be a steel shell.
  • the bottom of the metal case 1 is provided with a sinking portion 11 that sinks downward, and the electrode portion 21 on the negative electrode bus piece 2 protrudes downward and contacts the sinking portion 11 .
  • the first welding groove 12 is annular and surrounds the periphery of the electrode part 21 and the periphery of the sinking part 11 .
  • the first welding groove 12 surrounds the periphery of the second welding groove 22 , and the positions of the first welding groove 12 and the second welding groove 22 do not overlap.
  • the first welding groove 12 is provided on the lower side of the bottom of the metal shell 1 , protrudes upwards and contacts the negative electrode bus piece 2 .
  • the second welding groove 22 is provided on the lower side of the negative busbar 2 and is in the shape of a strip, a ring or a polygon.
  • UV glue is coated on the second welding groove 22 for rust prevention.
  • each second welding groove 22 is elongated.
  • the second welding groove 22 is in the form of a ring around the periphery of the electrode portion 21 .
  • the metal case 1 is cylindrical, and may be cylindrical, that is, the battery is a cylindrical battery, such as a small cylindrical battery of 18650, a medium cylindrical battery of 40140 or a large cylindrical battery of 63280.
  • Fig. 5 is a battery performance comparison table between the battery of the present invention and the traditional spot-welded metal shell battery mentioned in the background art.
  • the battery of the present invention has smaller internal resistance and good discharge temperature, and its performance is obviously better than that of the traditional battery.
  • the battery of the present invention realizes the electrical connection between the cell 3 and the steel shell through the negative bus piece 2, the metal shell 1 is provided with a first welding groove 12 on the upper bottom and the lower side, and the negative bus piece 2 is provided with an electrode part 21 and
  • the second welding groove 22 increases the contact area between the steel shell and the negative electrode bus piece 2, increases the conduction capacity, makes the battery have smaller internal resistance and discharge temperature rise, better guarantees battery performance, and improves customer satisfaction.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

La présente invention concerne une batterie, comprenant une coque métallique, une cellule de batterie disposée dans la coque métallique et une barre omnibus d'électrode négative disposée au fond de la coque métallique et au-dessous de la cellule de batterie. La coque métallique recouvre la surface latérale et la surface de fond de la cellule de batterie, une première rainure de soudage est ménagée dans le fond de la coque métallique, la barre omnibus d'électrode négative est pourvue d'une partie d'électrode et une seconde rainure de soudage est ménagée dans celle-ci, le fond de la coque métallique est soudé à la barre omnibus d'électrode négative au moyen de la première rainure de soudage, la partie d'électrode est soudée au fond de la coque métallique, et la barre omnibus d'électrode négative est soudée à une électrode négative de la cellule de batterie au moyen de la seconde rainure de soudage. Selon la batterie, une cellule de batterie est connectée électriquement à une coque en acier au moyen d'une barre omnibus d'électrode négative, une première rainure de soudage est formée dans le côté inférieur du fond de la coque métallique, et une partie d'électrode et une seconde rainure de soudage sont formées dans la barre omnibus d'électrode négative, la zone de contact entre la coque en acier et la barre omnibus d'électrode négative est augmentée, le flux de guidage est augmenté, la batterie présente une résistance interne plus faible ainsi qu'une plus faible augmentation de la température de décharge, les performances de la batterie sont mieux garanties et la satisfaction du client est améliorée.
PCT/CN2022/074623 2021-05-16 2022-01-28 Batterie WO2022242228A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202280024731.2A CN117099257A (zh) 2021-05-16 2022-01-28 电池

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110531110.0A CN113270696A (zh) 2021-05-16 2021-05-16 一种钢壳结构圆柱锂电池
CN202110531110.0 2021-05-16

Publications (1)

Publication Number Publication Date
WO2022242228A1 true WO2022242228A1 (fr) 2022-11-24

Family

ID=77230933

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/074623 WO2022242228A1 (fr) 2021-05-16 2022-01-28 Batterie

Country Status (2)

Country Link
CN (2) CN113270696A (fr)
WO (1) WO2022242228A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113270696A (zh) * 2021-05-16 2021-08-17 泰兴市宁辉锂电池有限公司 一种钢壳结构圆柱锂电池
CN113871763B (zh) * 2021-09-27 2024-03-01 远景动力技术(江苏)有限公司 圆柱形电池的壳体、圆柱形电池及圆柱形电池的安装方法
KR20230048051A (ko) * 2021-09-30 2023-04-10 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 전지 셀 및 그의 제조 방법, 제조 시스템, 전지 및 전기 장치

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203071156U (zh) * 2013-02-08 2013-07-17 深圳市沃特玛电池有限公司 一种电池汇流片结构
CN204834764U (zh) * 2015-06-17 2015-12-02 深圳市沃特玛电池有限公司 一种端面焊的圆柱形高倍率锂离子电池
JP2017162764A (ja) * 2016-03-11 2017-09-14 トヨタ自動車株式会社 電池モジュールの製造方法
CN206619636U (zh) * 2017-03-30 2017-11-07 陕西沃特玛新能源有限公司 一种电池
CN208539026U (zh) * 2018-08-28 2019-02-22 横店集团东磁股份有限公司 一种锂离子电池
CN112349949A (zh) * 2020-12-05 2021-02-09 天津赢慧科技咨询服务有限公司 无极耳焊接的电池及制备方法
CN113270696A (zh) * 2021-05-16 2021-08-17 泰兴市宁辉锂电池有限公司 一种钢壳结构圆柱锂电池

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203071156U (zh) * 2013-02-08 2013-07-17 深圳市沃特玛电池有限公司 一种电池汇流片结构
CN204834764U (zh) * 2015-06-17 2015-12-02 深圳市沃特玛电池有限公司 一种端面焊的圆柱形高倍率锂离子电池
JP2017162764A (ja) * 2016-03-11 2017-09-14 トヨタ自動車株式会社 電池モジュールの製造方法
CN206619636U (zh) * 2017-03-30 2017-11-07 陕西沃特玛新能源有限公司 一种电池
CN208539026U (zh) * 2018-08-28 2019-02-22 横店集团东磁股份有限公司 一种锂离子电池
CN112349949A (zh) * 2020-12-05 2021-02-09 天津赢慧科技咨询服务有限公司 无极耳焊接的电池及制备方法
CN113270696A (zh) * 2021-05-16 2021-08-17 泰兴市宁辉锂电池有限公司 一种钢壳结构圆柱锂电池

Also Published As

Publication number Publication date
CN117099257A (zh) 2023-11-21
CN113270696A (zh) 2021-08-17

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