WO2022007031A1 - Pile bouton - Google Patents

Pile bouton Download PDF

Info

Publication number
WO2022007031A1
WO2022007031A1 PCT/CN2020/104773 CN2020104773W WO2022007031A1 WO 2022007031 A1 WO2022007031 A1 WO 2022007031A1 CN 2020104773 W CN2020104773 W CN 2020104773W WO 2022007031 A1 WO2022007031 A1 WO 2022007031A1
Authority
WO
WIPO (PCT)
Prior art keywords
connecting part
bottom wall
wall
shell
sealing member
Prior art date
Application number
PCT/CN2020/104773
Other languages
English (en)
Chinese (zh)
Inventor
张健
何家勇
徐斌
Original Assignee
瑞声声学科技(深圳)有限公司
瑞声科技（南京）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 瑞声声学科技(深圳)有限公司, 瑞声科技（南京）有限公司 filed Critical 瑞声声学科技(深圳)有限公司
Publication of WO2022007031A1 publication Critical patent/WO2022007031A1/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
    • H01M50/109—Primary casings; Jackets or wrappings characterised by their shape or physical structure of button or coin shape
    • 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 energy storage devices, in particular to a button battery.
  • the battery body In the process of welding the cover body and the bottom case, the battery body is easily damaged due to the close distance between the welded and fixed part and the battery body inside the casing.
  • the object of the present invention is to provide a button battery in which the fixing operation of the casing does not damage the battery body.
  • a button battery comprises a bottom case with a receiving space, a battery body arranged in the receiving space, a cover body connected with the bottom case, and the bottom case includes a bottom wall and is bent from the periphery of the bottom wall an extending surrounding wall, the cover body includes a first housing facing the bottom wall, a second housing abutting with the surrounding wall, and connecting the first housing and the second housing the insulating part; the second housing includes a first connecting part, a second connecting part, a third connecting part and a fourth connecting part connected in sequence, the first connecting part is connected with the insulating part, so
  • the second connection portion extends away from the bottom wall from the periphery of the first connection portion, the third connection portion extends parallel to the bottom wall, and the fourth connection portion extends from the periphery of the third connection portion extending toward the bottom wall, the end of the surrounding wall is in contact with the third connecting part, and the outer part of the surrounding wall is abutting with the fourth connecting part; the third connecting part and The ends of the
  • the surrounding wall is provided with at least one opening, the outside of the opening is covered with a sealing member, and the sealing member is in contact with the fourth connection portion, the cover body, the sealing member and the
  • the bottom case forms a sealing structure; wherein, the sealing member can be melted at a set temperature, so that the substance in the receiving space can enter the outside of the bottom case through the opening.
  • the sealing member is an annular part, and the sealing member is wrapped around the opening, the connection between the bottom case and the cover body.
  • the thickness of the sealing member gradually decreases from an end close to the cover body to an end away from the cover body.
  • the first casing is connected to one electrode of the battery body, and the bottom wall is connected to the other electrode of the battery body.
  • a conductive member is also connected between the first casing and the electrode of the battery body, and a conductive member is also connected between the bottom wall and the electrode of the battery body, and the conductive member is used for The contact area of the electrode with the first shell and the bottom wall is extended.
  • the cross section of the insulating member is an "I"-shaped structure, including a first clamping part and a second clamping part, the first clamping part is clamped with the first connecting part, and the The second engaging portion is engaged with the first casing.
  • the third connecting portion and the end portion of the surrounding wall are welded and fixed, and the welding point is located on the third connecting portion.
  • the third connecting portion is provided with a plurality of dimples, and the dimples are used for welding positioning.
  • the first casing is a disk-shaped structure with a flange, and the first casing is clamped with the second clamping portion through the flange.
  • the beneficial effect of the present invention is that: by extending the second connecting part on the second casing away from the bottom wall, the third connecting part extends parallel to the bottom wall, and the fourth connecting part extends close to the bottom wall to form a distance away from the battery
  • the fixing space of the body is fixed, and the third connecting part is fixedly connected with the end of the surrounding wall, so that the battery body will not be damaged during the welding and fixing process of the shell.
  • FIG. 1 is a schematic diagram of an embodiment of a battery with a protection function of the present invention
  • Fig. 2 is the front view of the battery with protection function in Fig. 1;
  • Fig. 3 is the sectional view at A-A place in Fig. 2;
  • Fig. 4 is a partial view at B in Fig. 3;
  • FIG. 5 is a schematic diagram of an embodiment of the bottom case of a battery with protective kinetic energy according to the present invention.
  • FIG. 6 is a schematic diagram of an embodiment of a sealing member in a battery with a protective function of the present invention
  • FIG. 7 is a schematic diagram of an embodiment of the second casing in the battery with the protection function of the present invention.
  • Fig. 8 is a sectional view at C-C in Fig. 7;
  • Fig. 9 is a partial view at D in Fig. 8.
  • FIG. 10 is a schematic diagram of an embodiment of an insulating member in a battery with a protective function of the present invention
  • Figure 11 is a sectional view at E-E in Figure 10;
  • FIG. 12 is a schematic diagram of an embodiment of the first casing in the battery with a protective function of the present invention
  • FIG. 13 is a cross-sectional view of the first housing F-F in FIG. 12 .
  • a battery with a protective function includes a bottom case 10 with an accommodation space, a battery body 20 is arranged in the accommodation space of the bottom case 10 , the battery body 20 is used for storing or outputting electrical energy, and also includes a cover body 30 , the cover body 30 is covered on the bottom case 10 .
  • the bottom case 10 includes a bottom wall 11 and a surrounding wall 12 that is bent and extended from the periphery of the bottom wall 11 .
  • the second housing 31 includes a first connecting portion 312, a second connecting portion 313, a third connecting portion 314 and The fourth connecting portion 315, the first connecting portion 312 is connected to the insulating member 32, the second connecting portion 322 extends from the periphery of the first connecting portion in a direction away from the bottom wall 11, the third connecting portion 314 extends parallel to the bottom wall 11, and the third connecting portion 314 extends parallel to the bottom wall 11.
  • the four connecting portions 315 extend from the periphery of the third connecting portion toward the bottom wall 11 , the end of the surrounding wall is in contact with the third connecting portion 314 and the outer portion of the surrounding wall is in contact with the fourth connecting portion 315 ; the third connecting portion 314 is fixedly connected to the end of the surrounding wall 12 . Therefore, the battery body will not be damaged when the battery is connected by welding and other operations.
  • the surrounding wall 12 is provided with at least one opening 121, the outside of the opening 121 is covered with a sealing member 40, and the sealing member 40 abuts against the fourth connecting portion 315, the cover body 30, the sealing member 40 and the bottom case 10 form a sealing structure to block interference Gas, water, etc. enter the inside of the battery to ensure the stability and reliability of the battery operation. Furthermore, the sealing member 40 can be melted at a set temperature, so that the substances in the receiving space 11 can enter the outside of the bottom case 10 through the opening 12, so as to avoid the increase of the internal temperature of the battery and the increase of the volume, which may cause the internal pressure of the battery to be increased. rise, causing high temperature burns or explosions.
  • the sealing member 40 is an annular part, and the sealing member 40 is wrapped around the opening 12 , the connection between the bottom case 10 and the cover body 30 , so that a reliable sealing structure is formed between the cover body 30 and the bottom case 10 .
  • the thickness of the sealing member 40 gradually decreases from the end close to the cover body 30 to the end away from the cover body 30 , so that the connection between the cover body 30 and the bottom case 10 is smoothly transitioned.
  • the connection is smoothly transitioned through the sealing member 40, and the connection between the cover body 30, the sealing member 40 and the bottom case 10 has good integrity.
  • the thickness is relatively thin, which can respond quickly and prevent the air pressure and temperature inside the bottom case 10 from being too high, thereby ensuring the safety of the battery during operation.
  • a conductive member 50 is further connected between the second casing 31 and the electrode of the battery body 20, and a conductive member 50 is also connected between the first casing 33 and the electrode of the battery body 20, and the conductive member 50 is used to extend the electrode 21 and the bottom wall 11 and the contact area of the first casing 33, so that both the bottom wall 11 and the first casing 33 can have sufficient contact with the electrodes 21 on the battery body 20 to ensure the performance of the battery.
  • the third connection portion 314 and the bottom case 10 are connected to an integrated structure through a laser welding process.
  • the cover body 30 is a stamping and integral molding structure as a whole, the manufacturing process is simple, and the product consistency is good.
  • the insulating member 32 is an “I”-shaped structure, including a first clamping part 321 and a second clamping part 322 , the first clamping part 321 is clamped with the first connecting part 312 , and the second clamping part 321 is clamped with the first connecting part 312 .
  • the connecting portion 322 is clamped with the first casing 33 , and the bottom end of the insulating member 32 is in contact with the battery body 20 , and the battery body 20 is crimped in the bottom casing 10 to prevent the battery body 20 from being perpendicular to the bottom in the bottom casing 10 . directional movement of the shell 10 .
  • the third connecting portion 314 is provided with a plurality of dimples 3111, and welding is performed in the dimples 3111 to connect the cover body 30 and the bottom case 10 into an integrated structure.
  • the dimple 3111 is located on the top surface of the cover body 30, which is convenient for the operator to position during the welding process, and can also ensure the consistency of the welding point between the cover body 30 and the bottom case 10, so that the cover body 30 after welding is completed. The surface still has good consistency, which ensures the convenient use of the battery.
  • connection portion between the battery body 20 and the insulating member 32 is the sinking plane 23 , so that the first casing 33 and the second casing 31 are relatively far away from the battery body 20 .
  • the first housing 33 is a disk-shaped structure with a flange edge 331 , the first housing 33 is engaged with the second engaging portion 322 through the flange edge 331 , and the concave portion of the first housing 33 is The conductive member 50 abuts on the battery body 20 .
  • the bottom case 10 is in the shape of a hollow cylinder as a whole, and four openings 11 are evenly distributed on the side of the bottom case 10.
  • the openings 11 are used for pressure relief, which can prevent the internal pressure of the battery from increasing during charging and discharging. After the battery is large, the problem of destroying the battery components is provided, and the air pressure inside the battery is always within a safe air pressure range by setting the opening 11 to ensure the safety and reliability of the battery during use.
  • the sealing member 40 is a conical ring as a whole, and is sleeved at the opening 11 on the bottom case 10 to block the opening 11 and seal the connection between the cover 30 and the bottom case 10 .
  • the outer part of the sealing member 40 is a conical structure, and the inner part is a cylindrical hole sleeved on the bottom case 10, and the connection between the cover body 30 and the bottom case 10 is tightly sealed by the elastic deformation of the sealing member 40, so as to ensure the sealing of the cover body 30 and the sealing performance of the bottom case 10 connection.
  • the outer side of the sealing member 40 has a conical structure, so that the lower part of the connection between the sealing member 40 and the cover body 30 has a larger amount of elastic deformation than the upper part of the sealing member 40 , so that the sealing member 40 has a larger amount of elastic deformation.
  • the lower part has a larger pre-tightening force, so as to prevent the sealing element 40 from falling off from the bottom case 10 and ensure the reliability of the connection of the sealing element 40 .
  • the second casing 31 is an annular structure as a whole, and a through hole 313 is formed in the middle of the second casing 31 , and the through hole 313 is used for accommodating the insulating member 32 and the first casing 33 .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

L'invention concerne une pile bouton, une coque inférieure (10) dotée d'une paroi de fond (11) et d'une paroi périphérique (12) s'étendant de manière courbée à partir du bord périphérique de la paroi inférieure, et un couvercle (30) doté d'une première coque (33) directement opposée à la paroi de fond (11), d'une seconde coque (31) venant en butée contre la paroi environnante (12), et d'un élément isolant (32) reliant la première coque (33) et la deuxième coque (31) ; la deuxième coque (31) comprend une première partie de liaison (312), une deuxième partie de liaison (313), une troisième partie de liaison (314), et une quatrième partie de liaison (315) connectées en séquence. Au moyen du réglage préalable de la première partie de liaison (312), la seconde partie de liaison (313), la troisième partie de liaison (314), et la quatrième partie de liaison (315) sur la seconde coque (31), dans laquelle la première partie de liaison (312) est relié à l'élément isolant (32), la seconde partie de liaison (313) s'étend à l'opposé de la paroi inférieure (11), la troisième partie de liaison (314) s'étend parallèlement à la paroi inférieure (11), la quatrième partie de liaison (315) s'étend vers la paroi inférieure (11), une partie d'extrémité de la paroi périphérique (12) vient en butée contre la troisième partie de liaison (314) et une partie latérale externe de la paroi périphérique (12) est fixée à la quatrième partie de liaison (315), et la troisième partie de liaison (314) et la partie d'extrémité de la paroi périphérique (12) sont reliées de manière fixe, le corps de batterie ne sera pas endommagé en raison de la déformation de la coque provoquée par la température élevée pendant le processus de soudage.
PCT/CN2020/104773 2020-07-10 2020-07-27 Pile bouton WO2022007031A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010662006.0A CN111755633B (zh) 2020-07-10 2020-07-10 纽扣电池
CN202010662006.0 2020-07-10

Publications (1)

Publication Number Publication Date
WO2022007031A1 true WO2022007031A1 (fr) 2022-01-13

Family

ID=72711081

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/104773 WO2022007031A1 (fr) 2020-07-10 2020-07-27 Pile bouton

Country Status (2)

Country Link
CN (1) CN111755633B (fr)
WO (1) WO2022007031A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113013524B (zh) * 2021-02-23 2023-06-20 珠海冠宇电池股份有限公司 电池外壳及电池
CN111564576A (zh) * 2020-06-23 2020-08-21 瑞声科技（南京）有限公司 一种纽扣电池
CN112490543A (zh) * 2020-12-03 2021-03-12 惠州市恒泰科技股份有限公司 电池及其制备工艺
CN112599901A (zh) * 2020-12-16 2021-04-02 惠州市德能电池有限公司 一种陶瓷绝缘片、纽扣电池及其封装方法
CN112599902A (zh) * 2020-12-16 2021-04-02 惠州市德能电池有限公司 一种封装结构、纽扣电池及其封装方法
KR20220100465A (ko) * 2021-01-08 2022-07-15 주식회사 엘지에너지솔루션 배터리 팩, 전력 저장 장치, 및 자동차
DE102021113876A1 (de) 2021-05-28 2022-12-01 Bayerische Motoren Werke Aktiengesellschaft Batteriezelle

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JP2007059650A (ja) * 2005-08-25 2007-03-08 Matsushita Electric Ind Co Ltd コイン形蓄電セル
CN107611312A (zh) * 2017-10-25 2018-01-19 深圳市能锐创新科技有限公司 新型扣式锂离子电池
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CN210743987U (zh) * 2019-08-13 2020-06-12 广东微电新能源有限公司 一种电池装置以及电子设备
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Publication number Priority date Publication date Assignee Title
JP2007059650A (ja) * 2005-08-25 2007-03-08 Matsushita Electric Ind Co Ltd コイン形蓄電セル
CN107611312A (zh) * 2017-10-25 2018-01-19 深圳市能锐创新科技有限公司 新型扣式锂离子电池
CN110459703A (zh) * 2019-08-13 2019-11-15 广东微电新能源有限公司 一种电池装置以及电子设备
CN210379131U (zh) * 2020-02-27 2020-04-21 比亚迪股份有限公司 纽扣电池
CN111180617A (zh) * 2020-03-16 2020-05-19 惠州亿纬锂能股份有限公司 一种二次锂离子豆式电池及其制作方法

Also Published As

Publication number Publication date
CN111755633B (zh) 2022-04-05
CN111755633A (zh) 2020-10-09

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