WO2025194595A1 - 一种锂电池盖板结构和二次电池 - Google Patents

一种锂电池盖板结构和二次电池

Info

Publication number
WO2025194595A1
WO2025194595A1 PCT/CN2024/096969 CN2024096969W WO2025194595A1 WO 2025194595 A1 WO2025194595 A1 WO 2025194595A1 CN 2024096969 W CN2024096969 W CN 2024096969W WO 2025194595 A1 WO2025194595 A1 WO 2025194595A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover plate
top cover
pole
lithium battery
limiting member
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.)
Pending
Application number
PCT/CN2024/096969
Other languages
English (en)
French (fr)
Inventor
桂俊杰
贺文文
鞠林润
周家宇
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.)
Hefei Gotion High Tech Power Energy Co Ltd
Original Assignee
Hefei Gotion High Tech Power Energy 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 Hefei Gotion High Tech Power Energy Co Ltd filed Critical Hefei Gotion High Tech Power Energy Co Ltd
Priority to DE212024000191.0U priority Critical patent/DE212024000191U1/de
Publication of WO2025194595A1 publication Critical patent/WO2025194595A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • 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
    • 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
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • 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
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • 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 utility model relates to the field of new energy power batteries, and in particular to a lithium battery cover plate structure and a secondary battery.
  • the top cover plate is provided with a through-hole.
  • the pole is divided into a base portion and an extension portion.
  • the cross-sectional area of the base portion is larger than the diameter of the through-hole.
  • the base portion is located on the side of the top cover plate closest to the interior of the battery cell, with a sealing ring positioned between the base portion and the top cover plate.
  • a retaining spring or riveting structure is used to secure the extension portion, thereby securing the pole to the top cover plate. Because the base portion is located inside the battery cell, it occupies the internal space of the battery cell, reducing the utilization rate of the internal space and further affecting the improvement of the battery's energy density.
  • the utility model provides a lithium battery cover plate structure. While reducing the height and weight of the terminal, the terminal connection structure is designed and simplified, and the pole is firmly fixed to the end cover with a simple assembly process.
  • the present invention adopts the following technical solutions.
  • a lithium battery cover plate structure comprising a top cover plate with an electrode lead-out hole, and further comprising: a pole located on one side of the top cover plate and covering the electrode lead-out hole; a limiting plate connected to the top cover plate; A positioning member at least partially surrounds the pole to limit the relative position of the pole on the top cover plate; a fixing member connected to the top cover plate at least partially surrounds the pole and the limiting member to fix the pole and the limiting member on the top cover plate and separate the pole and the limiting member from each other.
  • the lithium battery cover plate structure of the present invention is connected to the top cover plate through a limiting piece to limit the pole, and then the limiting piece and the pole are fixed by a fixing piece.
  • This fixing structure and connection method greatly reduces the number of structural parts, reduces the difficulty of production and assembly, improves production efficiency, and also reduces the production cost of the cover plate structure.
  • the fixing member has an annular base covering the top of the limiting member, a first extension portion, and a second extension portion; the first extension portion extends from the outer peripheral edge of the base toward the direction close to the top cover plate to wrap the outer peripheral surface of the limiting member; the second extension portion extends from the inner peripheral edge of the base toward the direction close to the top cover plate to separate the limiting member and the pole, and wrap the outer peripheral surface of the pole.
  • the pole has a flange facing the top cover plate
  • the limiting member has a connecting portion connected to the top cover plate, and a cylindrical portion and an annular portion extending from the connecting portion in a direction away from the top cover plate, and limits the radial movement and axial movement of the pole by cooperating with the flange.
  • a seal is provided between the top cover plate and the pole, and the edge of the seal abuts against the limiter and the fixing member to seal the gap between the top cover plate and the pole.
  • the support member may be a sealing ring to ensure a good sealing effect.
  • the limiting member is connected to the top cover plate by welding.
  • the limiting member can be a welding ring.
  • the fixing member is an insulating injection molded member, which is finally formed by insulating injection molding, thereby achieving fixation of the pole and the limiting member with a simple process method.
  • a stop frame is provided on the side of the top cover plate facing away from the pole, and the stop frame is provided with a welding hole to cooperate with the electrode lead-out hole.
  • a connecting piece is provided on the side of the stopper away from the top cover plate.
  • the connecting piece is provided with a raised positioning portion that passes through the welding hole and the electrode lead-out hole, and is connected to the terminal. The cooperation between the raised positioning portion and the welding hole and the electrode lead-out hole can achieve the effect of positioning the connecting piece.
  • the stop frame is provided with a positioning column on one side facing the connecting piece.
  • a positioning hole is provided to cooperate with the positioning column to further realize the fast and accurate positioning and installation of the connecting piece and avoid the deviation of the connecting piece.
  • a secondary battery comprises a shell with at least one end open, a battery cell arranged in the shell, the above-mentioned lithium battery cover plate structure is arranged at the shell opening, and the connecting piece is electrically connected to the battery cell.
  • the present invention provides a lithium battery cover plate structure, which is connected to the top cover plate through a limiting member to limit the pole, and then the limiting member and the pole are fixed by a fixing member.
  • This fixing structure and connection method greatly reduces the number of structural parts, reduces the difficulty of production and assembly, improves production efficiency, and also reduces the production cost of the cover plate structure.
  • the present invention provides a lithium battery cover structure, which is a fixing member composed of a base, a first extension part, and a second extension part.
  • a single structural member can limit the movement of the limiter and the pole in the radial and axial directions of the pole, thereby simplifying the assembly process.
  • the limiter and the pole can be completely separated by the second extension part to ensure the insulation effect.
  • the present invention provides a lithium battery cover structure, which can enhance the sealing effect by setting a sealing member, making the cover structure more compact as a whole.
  • the present invention provides a lithium battery cover plate structure, in which a positioning protrusion is provided on the connecting plate, which can cooperate with the welding hole and the electrode lead-out hole to achieve the effect of positioning and installing the connecting plate.
  • a positioning column is provided on the stop frame, and a positioning hole cooperating with the positioning column is provided on the connecting plate, which can further achieve rapid and accurate positioning and installation of the connecting plate and avoid displacement of the connecting plate during the installation process.
  • FIG1 is a schematic diagram of the structure of the lithium battery cover plate structure in Example 1;
  • FIG2 is a schematic diagram of the assembly of the lithium battery cover structure in Example 1;
  • FIG3 is a schematic diagram of the assembly of the limiting member and the pole of the lithium battery cover structure in Example 1;
  • FIG4 is a schematic structural diagram of a position-limiting member in the lithium battery cover structure in Example 1;
  • FIG5 is a schematic diagram of the structure of the lithium battery cover plate structure after assembly in Example 1;
  • FIG6 is a schematic structural diagram of a lithium battery cover structure in Example 1 without a pole
  • FIG7 is a schematic diagram of the structure of the lithium battery cover plate structure assembled with the connecting piece in Example 1;
  • FIG8 is a schematic structural diagram of the connecting piece in the lithium battery cover structure in Example 1;
  • FIG9 is a cross-sectional view of the connecting piece in the lithium battery cover structure in Example 1.
  • This embodiment provides a lithium battery cover plate structure, which is mainly used in secondary batteries or lithium batteries.
  • the lithium battery cover plate structure can be assembled at the opening of the battery shell and is applicable to batteries with one end open as well as batteries with two ends open.
  • the lithium battery cover plate structure mainly includes a top cover plate 100 , a pole 200 assembled on the top cover plate 100 , and a connecting structure therebetween.
  • the top cover plate 100 is provided with an electrode lead-out hole 101, and the pole 200 is located on one side of the top cover plate 100 and covers the electrode lead-out hole 101.
  • a limiter 300 is also provided on the same side of the top cover plate 100. The limiter 300 is connected to the top cover plate 100 and at least partially surrounds the pole 200, thereby limiting the relative position of the pole 200 on the top cover plate 100.
  • a fixing member 400 is also provided on the same side of the top cover plate 100. The fixing member 400 is connected to the top cover plate 100 and at least partially surrounds the pole 200.
  • the pole 200 and the limiting member 300 are fixed to the top cover plate 100, wherein a portion of the fixing member 400 is filled between the pole 200 and the limiting member 300, so that the pole 200 and the limiting member 300 are separated from each other, thereby ensuring the insulation effect.
  • the lithium battery cover plate structure of this embodiment is connected to the top cover plate 100 through a limiting member 300, which limits the pole 200, and then fixed by a fixing member 400.
  • This fixing structure and connection method greatly reduces the number of structural parts, reduces the difficulty of production and assembly, improves production efficiency, and also reduces the production cost of the cover plate structure.
  • the fixing member 400 includes an annular base 401, a first extension 402, and a second extension 403.
  • the annular base 401 covers the top of the stopper 300.
  • the first extension 402 extends from the outer peripheral edge of the base 401 toward the top cover plate 100 to wrap around the outer peripheral surface of the stopper 300, thereby limiting radial movement of the stopper 300 and the pole 200.
  • the second extension 403 extends from the inner peripheral edge of the base 401 toward the top cover plate 100 to separate the stopper 300 from the pole 200 and wrap around the outer peripheral surface of the pole 200, thereby ensuring insulation and firmly fixing the pole 200 and the stopper 300 to the top cover plate 100.
  • the fixing member 400 may be an insulating injection molded part, that is, formed by insulating injection molding, so that the stopper 300 and the pole 200 can be fixed using a simpler process.
  • the pole 200 has a flange 201 facing the top cover plate 100
  • the limiter 300 has a connecting portion 301 connected to the top cover plate 100, and a cylindrical portion 302 and an annular portion 303 extending from the connecting portion 301 in a direction away from the top cover plate 100.
  • the two cooperate with the flange 201, and the cylindrical portion 302 can limit the radial movement of the pole 200.
  • the annular portion 303 and the top cover plate 100 cooperate to clamp the flange 201 to limit the axial movement of the pole 200.
  • the limiter 300 can be connected to the top cover plate 100 by welding.
  • the top cover plate 100 is provided with a groove surrounding the pole 200, the stopper 300, and the fixing member 400.
  • the groove can accommodate the contact portions of the fixing member 400, the stopper 300, the pole 200, and the top cover plate 100.
  • the outer peripheral edge of the connecting portion 301 of the stopper 300 is welded to the inner sidewall of the groove, and the fixing member 400 formed by insulating injection molding fills the remaining gap in the groove, which can improve the integrity and aesthetics of the overall cover plate structure.
  • a seal 500 is provided between the pole 200 and the top cover plate 100.
  • the edge of the seal 500 abuts against the limiter 300 and the fixing member 400, thereby ensuring the sealing effect while improving the compactness of the overall connection structure.
  • a stopper 600 is required. That is, a stopper 600 is provided on the side of the top cover plate 100 away from the pole 200. As shown in FIG6 , the stopper 600 is provided with a welding hole 601 in conjunction with the electrode lead-out hole 101.
  • a connecting piece 700 is further provided on the side of the stop frame 600 facing away from the top cover 100.
  • the connecting piece 700 is provided with a raised positioning portion 701 that passes through the welding hole 601 and the electrode lead-out hole 101.
  • the raised positioning portion 701 is connected to the electrode 200, thereby achieving the effect of quickly positioning the connecting piece 700 during installation.
  • a positioning post 602 is provided on the side of the stop frame 600 facing the connecting piece 700, and a positioning hole 702 is provided on the connecting piece 700 for cooperating with the positioning post 602. This can further achieve fast and accurate positioning and installation of the connecting piece 700 and prevent the connecting piece 700 from deflecting.
  • This embodiment provides a secondary battery, which is mainly used in new energy power battery modules. Multiple secondary batteries can form a large power battery module to provide power for new energy vehicles and other equipment.
  • the secondary battery comprises a shell with at least one end open, a battery cell is arranged in the shell, the lithium battery cover structure in Example 1 is arranged at the shell opening, and the battery cell draws out electricity through a connecting piece 700 at the end.

Landscapes

  • 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)

Abstract

涉及一种锂电池盖板结构和二次电池，属于新能源动力电池领域。锂电池盖板组件包括具有电极引出孔（101）的顶盖板（100），还包括：位于所述顶盖板（100）的一侧，且覆盖所述电极引出孔（101）的极柱（200）；与顶盖板（100）相连接的限位件（300），其至少部分地包围所述极柱（200），以限制极柱（200）在所述顶盖板（100）上的相对位置；与顶盖板（100）相连接的固定件（400），至少部分地包围所述极柱（200）和限位件（300），以将极柱（200）和限位件（300）固定在所述顶盖板（100）上，并使得所述极柱（200）和限位件（300）彼此隔开。通过限位件（300）与顶盖板（100）连接，限位极柱（200），再通过固定件（400）固定限位件（300）和极柱（200），此种固定结构和连接方式大大减少了结构件数量，降低了生产组装难度，提高了生产效率的同时还降低了盖板结构的生产成本。

Description

一种锂电池盖板结构和二次电池 技术领域
本实用新型涉及新能源动力电池领域，具体地说，涉及一种锂电池盖板结构和二次电池。
背景技术
近年来，伴随着新能源汽车全球市场的快速增长，为了满足人们对续航里程的需求，对电池的能量密度的要求逐年提升，同时给电芯结构设计的安全性和轻量化也提出了更高的要求。
现有盖板组件中，顶盖板上设有贯通孔，极柱分为基体部和延伸部，并且基体部的横截面积大于贯通孔的孔径，在装配时，基体部位于顶盖板靠近电芯内部的一侧，密封圈位于基体部和顶盖板之间，待延伸部穿过通孔后利用卡簧或者铆接结构固定延伸部，从而以此方式将极柱固定在顶盖板上。其中由于基体部位于电芯内部，由此会占用电芯内部空间，从而降低了电芯内部空间的利用率，进一步影响电池能量密度的提升。
由此急需一种盖板组件，使用不占用电芯内部空间的较短极柱的同时，能够以简单的结构固定好极柱，避免较短极柱与顶盖板脱离，从而保证电池的使用可靠性。
实用新型内容
1、要解决的问题
针对现有技术中，较短极柱和端盖之间通过常规铆接和卡簧连接等连接方式连接时，固定力度不够，极柱容易脱落的问题，本实用新型提供一种锂电池盖板结构，在端子高度降低重量减轻的情况下，对端子连接结构进行设计和简化，以简单的组装工序，将极柱牢牢地固定在端盖上。
2、技术方案
为解决上述问题，本实用新型采用如下的技术方案。
一种锂电池盖板结构，包括具有电极引出孔的顶盖板，还包括：位于所述顶盖板的一侧，且覆盖所述电极引出孔的极柱；与顶盖板相连接的限 位件，其至少部分地包围所述极柱，以限制极柱在所述顶盖板上的相对位置；与顶盖板相连接的固定件，至少部分地包围所述极柱和限位件，以将极柱和限位件固定在所述顶盖板上，并使得所述极柱和限位件彼此隔开。
本实用新型的锂电池盖板结构，通过限位件与顶盖板连接，限位极柱，再通过固定件固定限位件和极柱，此种固定结构和连接方式大大减少了结构件数量，降低了生产组装难度，提高了生产效率的同时还降低了盖板结构的生产成本。
在一些实施例中，所述固定件具有覆盖在限位件顶部的环状基部、第一延伸部和第二延伸部；所述第一延伸部从所述基部外周边缘朝靠近所述顶盖板的方向延伸，以包裹所述限位件的外周面；所述第二延伸部从所述基部内周边缘朝靠近所述顶盖板的方向延伸，以隔开所述限位件和极柱，并包裹极柱的外周面。
进一步地，所述极柱朝向所述顶盖板具有凸缘，所述限位件具有与顶盖板连接的连接部，和自连接部朝远离顶盖板的方向延伸的筒状部和环状部，通过与所述凸缘的配合限制极柱的径向运动和轴向运动。
在一些实施例中，所述顶盖板和极柱之间设有密封件，密封件的边缘与所述限位件和固定件抵接，以密封顶盖板和极柱之间的间隙。该支撑件可以是密封圈，以保证密封效果。
进一步地，所述限位件通过焊接的方式和所述顶盖板连接。该限位件可以是焊接环。
进一步地，所述固定件为绝缘注塑件。通过绝缘注塑的方式最后形成绝缘注塑件，从而以简单的工艺方法实现极柱和限位件的固定。
在一些实施例中，所述顶盖板背离所述极柱一侧设置有止动架，止动架配合所述电极引出孔设有焊接孔。
进一步地，所述止动架背离所述顶盖板一侧设置有连接片，连接片上设置有穿过所述焊接孔和电极引出孔的凸起定位部，凸起定位部与所述极柱连接。其中凸起定位部和焊接孔、电极引出孔的配合可以实现定位连接片的效果。
进一步地，所述止动架朝向所述连接片一侧设置有定位柱，连接片上 设有与定位柱配合定位的定位孔。可以进一步地实现连接片快速准确的定位安装，并避免连接片发生偏移。
一种二次电池，包括至少一端开口的壳体，壳体内设有电芯，所述壳体开口处设置有上述的锂电池盖板结构，其中所述连接片与所述电芯电连接。
显而易见，在以上单个实施方式中描述的元件或特征可以在其它实施方式中单独或组合使用。
3、有益效果
相比于现有技术，本实用新型的有益效果为：
(1)本实用新型提供的一种锂电池盖板结构，通过限位件与顶盖板连接，限位极柱，再通过固定件固定限位件和极柱，此种固定结构和连接方式大大减少了结构件数量，降低了生产组装难度，提高了生产效率的同时还降低了盖板结构的生产成本。
(2)本实用新型提供的一种锂电池盖板结构，由基部、第一延伸部和第二延伸部构成的固定件，以一个结构件便可以限制限位件和极柱在极柱径向方向上和轴向方向上的运动，简化了装配过程，并且可以通过第二延伸部完全隔开限位件和极柱，保证绝缘效果。
(3)本实用新型提供的一种锂电池盖板结构，通过设置密封件，可以增强密封效果，使得盖板结构整体更加紧凑。
(4)本实用新型提供的一种锂电池盖板结构，在连接片上设置定位凸起部，可以和焊接孔、电极引出孔配合，以实现定位安装连接片的效果，在止动架上设置定位柱，在连接片上设置配合定位柱的定位孔，既可以进一步地实现连接片快速准确的定位安装，又可以避免在安装过程中连接片发生偏移。
附图说明
在附图中，尺寸和比例不代表实际产品的尺寸和比例。附图仅仅是说明性的，并且为了清楚起见，省略了某些非必要的元件或特征。
图1为实施例1中锂电池盖板结构的结构组成示意图；
图2为实施例1中锂电池盖板结构的装配示意图；
图3为实施例1中锂电池盖板结构的限位件、极柱装配示意图；
图4为实施例1中锂电池盖板结构中限位件的结构示意图；
图5为实施例1中锂电池盖板结构装配完成的结构示意图；
图6为实施例1中锂电池盖板结构未装配极柱的结构示意图；
图7为实施例1中锂电池盖板结构装配连接片的结构示意图；
图8为实施例1中锂电池盖板结构中连接片的结构示意图；
图9为实施例1中锂电池盖板结构中连接片的剖视图。
附图标记说明
100、顶盖板；101、电极引出孔；200、极柱；201、凸缘；300、限
位件；301、连接部；302、筒状部；303、环状部；400、固定件；401、基部；402、第一延伸部；403、第二延伸部；500、密封件；600、止动架；601、焊接孔；602、定位柱；700、连接片；701、凸起定位部；702、定位孔。
具体实施方式
接下来将参照附图详细描述本实用新型。这里所描述的仅仅是根据本实用新型的优选实施方式，本领域技术人员可以在优选实施方式的基础上想到能够实现本实用新型的其他方式，其他方式同样落入本实用新型的范围。
实施例1
本实施例提供一种锂电池盖板结构，主要应用于二次电池或锂电池。该锂电池盖板结构可以装配在电池壳体的开口处，既适用于一端开口的电池，也适用于两端开口的电池。
如图1、图2和图5所示，该锂电池盖板结构主要包括顶盖板100、装配在顶盖板100上的极柱200，以及二者之间的连接结构件。
其中顶盖板100上设置有电极引出孔101，极柱200位于顶盖板100的一侧，并覆盖该电极引出孔101。在顶盖板100的同侧还设置有限位件300，限位件300与顶盖板100相连接，并至少部分地包围极柱200，从而限制极柱200在顶盖板100上的相对位置。另外在顶盖板100的同侧还设置有固定件400，固定件400和顶盖板100相连接，并且至少部分地包围 极柱200和限位件300，从而将极柱200和限位件300固定在顶盖板100上，其中，固定件400的一部分填充在极柱200和限位件300之间，使得极柱200和限位件300彼此隔开，从而保证绝缘效果。
本实施例的锂电池盖板结构，通过限位件300与顶盖板100连接，限位极柱200，再通过固定件400固定限位件300和极柱200，此种固定结构和连接方式大大减少了结构件数量，降低了生产组装难度，提高了生产效率的同时还降低了盖板结构的生产成本。
在一种可能的实施方式中，固定件400具有环状的基部401、第一延伸部402和第二延伸部403，其中环状的基部401覆盖在限位件300顶部；第一延伸部402从基部401外周边缘朝靠近顶盖板100的方向延伸，以包裹限位件300的外周面，从而限制限位件300和极柱200的径向运动；第二延伸部403从基部401内周边缘朝靠近顶盖板100的方向延伸，以隔开限位件300和极柱200，并包裹极柱200的外周面，从而保证绝缘效果，并稳固地将极柱200和限位件300固定在顶盖板100上。在进一步可能的实施例中，该固定件400可以是绝缘注塑件，即通过绝缘注塑的方式形成固定件400，从而可以以更简单的工艺实现限位件300和极柱200的固定。
关于限位件300的进一步设计，在一种可能的实施方式中，如图3和4所示，极柱200朝向顶盖板100具有凸缘201，限位件300具有与顶盖板100连接的连接部301，和自连接部301朝远离顶盖板100的方向延伸的筒状部302和环状部303，二者和凸缘201相配合，筒状部302可以限制极柱200的径向运动，环状部303和顶盖板100配合夹持凸缘201可以限制极柱200的轴向运动。如此设置，可以使得盖板整体结构更加紧凑稳定。在进一步可能的实施例中，该限位件300可以通过焊接的方式和顶盖板100连接。
在一种可能的实施方式中，顶盖板100围绕极柱200、限位件300和固定件400设置有一凹槽，凹槽可以容纳固定件400、限位件300、极柱200和顶盖板100的接触部分。具体的，限位件300连接部301的外周边缘与凹槽的内侧壁焊接，通过绝缘注塑形成的固定件400填充在凹槽其余间隙处，可以提升盖板整体结构的完整度和美观度。
进一步地，为了保证极柱200连接处的密封效果，在极柱200和顶盖板100之间设置有密封件500，密封件500的边缘与限位件300和固定件400抵接，在保证密封效果的同时，提升整体连接结构的紧凑度。
在将盖板结构安装在电池壳体开口之前，还需要设置止动架600。即在顶盖板100背离极柱200一侧设置止动架600，如图6所示，止动架600配合电极引出孔101设有焊接孔601。
在装配盖板结构时，需要将电芯连接片700与极柱200电连接，在这个过程中经常会出现难以精准定位的问题，导致装配过程困难。为此，在一种可能的实施例中，如图6-9所示，在止动架600背离顶盖板100一侧还设置有连接片700，连接片700上设置有穿过焊接孔601和电极引出孔101的凸起定位部701，凸起定位部701和极柱200连接，从而实现连接片700安装快速定位的效果。
对本实施例进行进一步地改进，止动架600朝向连接片700一侧设置有定位柱602，连接片700上设有与定位柱602配合定位的定位孔702。可以进一步地实现连接片700快速准确的定位安装，并避免连接片700发生偏移。
实施例2
本实施例提供一种二次电池，主要应用于新能源动力电池模组。多个二次电池可以构成大的动力电池模组，从而为新能源车辆等设备提供电力。
该二次电池包括至少一端开口的壳体，壳体内设有电芯，在壳体开口处设置实施例1中的锂电池盖板结构，电芯通过端部的连接片700将电力引出。
在本实用新型的描述中，需要说明的是，术语中“前”、“后”、“左”、“右”、“上”、“下”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或者位置关系，仅是为了便于描述本实用新型和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。
在本实用新型的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域普通技术人员而言，可以具体情况理解上述术语在本实用新型中的具体含义。
本实用新型的保护范围仅由权利要求限定。得益于本实用新型的教导，本领域技术人员容易认识到可将本实用新型所公开结构的替代结构作为可行的替代实施方式，并且可将本实用新型所公开的实施方式进行组合以产生新的实施方式，它们同样落入所附权利要求书的范围内。

Claims (10)

  1. 一种锂电池盖板结构，包括具有电极引出孔(101)的顶盖板(100)，其特征在于，还包括：
    极柱(200)，位于所述顶盖板(100)的一侧，且覆盖所述电极引出孔(101)；
    限位件(300)，所述限位件(300)与顶盖板(100)相连接，并至少部分地包围所述极柱(200)，以限制极柱(200)在所述顶盖板(100)上的相对位置；
    固定件(400)，所述固定件(400)与顶盖板(100)相连接，并至少部分地包围所述极柱(200)和限位件(300)，以将极柱(200)和限位件(300)固定在所述顶盖板(100)上，并使得所述极柱(200)和限位件(300)彼此隔开。
  2. 根据权利要求1所述的锂电池盖板结构，其特征在于：所述固定件(400)具有覆盖所述限位件(300)顶部的环状基部(401)、第一延伸部(402)和第二延伸部(403)；
    所述第一延伸部(402)从所述基部(401)外周边缘朝靠近所述顶盖板(100)的方向延伸，以包裹所述限位件(300)的外周面；
    所述第二延伸部(403)从所述基部(401)内周边缘朝靠近所述顶盖板(100)的方向延伸，以隔开所述限位件(300)和极柱(200)，并包裹极柱(200)的外周面。
  3. 根据权利要求1所述的锂电池盖板结构，其特征在于：所述极柱(200)朝向所述顶盖板(100)具有凸缘(201)，所述限位件(300)具有与顶盖板(100)连接的连接部(301)，和自连接部(301)朝远离顶盖板(100)的方向延伸的筒状部(302)和环状部(303)，通过与所述凸缘(201)的配合限制极柱(200)的径向运动和轴向运动。
  4. 根据权利要求1所述的锂电池盖板结构，其特征在于：所述顶盖板(100)和极柱(200)之间设有密封件(500)，密封件(500)的边缘与所述限位件(300)和固定件(400)抵接。
  5. 根据权利要求1所述的锂电池盖板结构，其特征在于：所述限位 件(300)通过焊接的方式和所述顶盖板(100)连接。
  6. 根据权利要求1所述的锂电池盖板结构，其特征在于：所述固定件(400)为绝缘注塑件。
  7. 根据权利要求1-6任一项所述的锂电池盖板结构，其特征在于：所述顶盖板(100)背离所述极柱(200)一侧设置有止动架(600)，止动架(600)配合所述电极引出孔(101)设有焊接孔(601)。
  8. 根据权利要求7所述的锂电池盖板结构，其特征在于：所述止动架(600)背离所述顶盖板(100)一侧设置有连接片(700)，连接片(700)上设置有穿过所述焊接孔(601)和电极引出孔(101)的凸起定位部(701)，凸起定位部(701)与所述极柱(200)连接。
  9. 根据权利要求7所述的锂电池盖板结构，其特征在于：所述止动架(600)朝向所述连接片(700)一侧设置有定位柱(602)，连接片(700)上设有与定位柱(602)配合定位的定位孔(702)。
  10. 一种二次电池，包括至少一端开口的壳体，壳体内设有电芯，其特征在于，所述壳体开口处设置有权利要求1-9任一项所述的锂电池盖板结构，其中所述连接片(700)与所述电芯电连接。
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Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108963122A (zh) * 2018-06-14 2018-12-07 宁德时代新能源科技股份有限公司 顶盖组件及二次电池
CN108963177A (zh) * 2018-09-13 2018-12-07 中兴高能技术有限责任公司 一种锂电池电芯及锂电池电芯包绝缘膜方法
CN211045490U (zh) * 2019-12-30 2020-07-17 宁德时代新能源科技股份有限公司 二次电池及用于其的顶盖组件、电池模块和装置
CN111599953A (zh) * 2018-03-09 2020-08-28 宁德时代新能源科技股份有限公司 二次电池的顶盖组件和二次电池
CN112864502A (zh) * 2019-11-12 2021-05-28 深圳市海瀚新能源技术有限公司 一种顶盖组件、外壳及二次电池
CN214625304U (zh) * 2021-02-23 2021-11-05 湖北亿纬动力有限公司 电池焊接连接片及电池模组
CN215834605U (zh) * 2021-05-11 2022-02-15 江苏正力新能电池技术有限公司 一种二次电池的顶盖组件及动力电池
CN215911558U (zh) * 2021-08-31 2022-02-25 蜂巢能源科技有限公司 电池盖及具有其的电池模组
CN215911482U (zh) * 2021-08-31 2022-02-25 蜂巢能源科技有限公司 电池盖及具有其的电池模组
WO2022077904A1 (zh) * 2020-10-13 2022-04-21 厦门海辰新能源科技有限公司 顶盖结构及具有其的锂电池
CN114447485A (zh) * 2021-11-29 2022-05-06 陈中元 一种顶盖组件、顶盖组件制造方法及二次电池
CN216958262U (zh) * 2021-11-29 2022-07-12 武汉富航精密工业有限公司 一种顶盖组件及二次电池
US20230069967A1 (en) * 2021-09-03 2023-03-09 Fuji Electric Co., Ltd. Semiconductor apparatus and semiconductor apparatus manufacturing method
CN116487779A (zh) * 2022-01-14 2023-07-25 宁德时代新能源科技股份有限公司 端盖组件、电池单体、电池及用电装置
CN219998428U (zh) * 2023-06-30 2023-11-10 合肥国轩高科动力能源有限公司 一种锂电池
CN220106686U (zh) * 2023-05-08 2023-11-28 深圳市考克斯新能源科技有限公司 便于焊接连接片的锂电池盖板及锂电池
CN117638335A (zh) * 2023-12-15 2024-03-01 武汉富航精密工业有限公司 一种锂电池的顶盖组件及其加工方法

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111599953A (zh) * 2018-03-09 2020-08-28 宁德时代新能源科技股份有限公司 二次电池的顶盖组件和二次电池
CN111785866A (zh) * 2018-06-14 2020-10-16 宁德时代新能源科技股份有限公司 顶盖组件及二次电池
CN108963122A (zh) * 2018-06-14 2018-12-07 宁德时代新能源科技股份有限公司 顶盖组件及二次电池
CN108963177A (zh) * 2018-09-13 2018-12-07 中兴高能技术有限责任公司 一种锂电池电芯及锂电池电芯包绝缘膜方法
CN112864502A (zh) * 2019-11-12 2021-05-28 深圳市海瀚新能源技术有限公司 一种顶盖组件、外壳及二次电池
CN211045490U (zh) * 2019-12-30 2020-07-17 宁德时代新能源科技股份有限公司 二次电池及用于其的顶盖组件、电池模块和装置
WO2022077904A1 (zh) * 2020-10-13 2022-04-21 厦门海辰新能源科技有限公司 顶盖结构及具有其的锂电池
CN214625304U (zh) * 2021-02-23 2021-11-05 湖北亿纬动力有限公司 电池焊接连接片及电池模组
CN215834605U (zh) * 2021-05-11 2022-02-15 江苏正力新能电池技术有限公司 一种二次电池的顶盖组件及动力电池
CN215911558U (zh) * 2021-08-31 2022-02-25 蜂巢能源科技有限公司 电池盖及具有其的电池模组
CN215911482U (zh) * 2021-08-31 2022-02-25 蜂巢能源科技有限公司 电池盖及具有其的电池模组
US20230069967A1 (en) * 2021-09-03 2023-03-09 Fuji Electric Co., Ltd. Semiconductor apparatus and semiconductor apparatus manufacturing method
CN114447485A (zh) * 2021-11-29 2022-05-06 陈中元 一种顶盖组件、顶盖组件制造方法及二次电池
CN216958262U (zh) * 2021-11-29 2022-07-12 武汉富航精密工业有限公司 一种顶盖组件及二次电池
CN116487779A (zh) * 2022-01-14 2023-07-25 宁德时代新能源科技股份有限公司 端盖组件、电池单体、电池及用电装置
CN220106686U (zh) * 2023-05-08 2023-11-28 深圳市考克斯新能源科技有限公司 便于焊接连接片的锂电池盖板及锂电池
CN219998428U (zh) * 2023-06-30 2023-11-10 合肥国轩高科动力能源有限公司 一种锂电池
CN117638335A (zh) * 2023-12-15 2024-03-01 武汉富航精密工业有限公司 一种锂电池的顶盖组件及其加工方法

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