WO2024114829A1 - 电池顶盖组件及电池 - Google Patents

电池顶盖组件及电池 Download PDF

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Publication number
WO2024114829A1
WO2024114829A1 PCT/CN2024/072292 CN2024072292W WO2024114829A1 WO 2024114829 A1 WO2024114829 A1 WO 2024114829A1 CN 2024072292 W CN2024072292 W CN 2024072292W WO 2024114829 A1 WO2024114829 A1 WO 2024114829A1
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WO
WIPO (PCT)
Prior art keywords
top cover
battery
vent
groove
boss
Prior art date
Application number
PCT/CN2024/072292
Other languages
English (en)
French (fr)
Inventor
周宇
陈贤阳
孙飞
Original Assignee
湖北亿纬动力有限公司
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 湖北亿纬动力有限公司 filed Critical 湖北亿纬动力有限公司
Publication of WO2024114829A1 publication Critical patent/WO2024114829A1/zh

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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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • H01M50/147—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
    • 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
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • 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 present application relates to the field of battery technology, for example, to a battery top cover assembly and a battery comprising the battery top cover assembly.
  • the top cover assembly is one of the important parts of the battery, mainly used to seal the open end of the battery shell.
  • the top cover assembly includes a cover plate and an insulating bracket.
  • the cover plate is provided with mounting holes on opposite sides in the thickness direction.
  • the pole includes a pole body and a pressure plate arranged at one end of the pole body. The pressure plate protrudes from the outer periphery of the pole body.
  • the insulating bracket is arranged on the side of the cover plate close to the inside of the battery shell.
  • a through hole is arranged through the position of the insulating bracket corresponding to the mounting hole.
  • the pole body passes through the mounting hole and the through hole in turn to be connected with the pressure plate.
  • the pressure plate is squeezed on the side of the insulating bracket close to the inside of the battery shell.
  • a sealing ring is arranged between the cover plate and the pole body.
  • the pressure plate and the insulating bracket will be compressed and tightly combined to form a sealing part.
  • the gas cannot pass through the sealing part between the pressure plate and the insulating bracket.
  • the top cover assembly can still pass the helium detection, resulting in a misjudgment of the helium detection.
  • the present application provides a battery top cover assembly, which can improve the accuracy of helium detection.
  • the present application provides a battery with a high yield.
  • an embodiment of the present application provides a battery top cover assembly, comprising a top cover sheet, a lower insulating member and a pole, wherein the lower insulating member is stacked on a side of the top cover sheet close to the interior of the battery shell, the top cover sheet is provided with a mounting hole, the mounting hole passes through the top and bottom of the top cover sheet, the lower insulating member is provided with a first through hole, the first through hole passes through the top and bottom of the lower insulating member and corresponds to the mounting hole, one end of the pole passes through the mounting hole and the first through hole in sequence and is pressed against a side of the lower insulating member away from the top cover sheet, a cavity for installing a sealing ring is formed between the top cover sheet and the pole, a vent portion connected to the cavity is provided at the portion where the lower insulating member is pressed against the pole, the vent portion is a vent hole or a vent groove, and the vent portion is connected to the side of the lower insulating member away from the
  • vents there are at least two vents, and all of the vents are spaced apart and distributed around a center line of the first through hole.
  • the lower insulating member includes a boss, the first through hole is opened on the boss, the lower end of the pole is pressed against the boss, the ventilation portion is the vent, the boss is provided with the vent, the vent passes through the top and bottom of the boss, and the vent is connected to the first through hole.
  • the lower insulating member includes a boss, the first through hole is opened on the boss, the lower end of the pole is pressed against the boss, the ventilation portion is the ventilation groove, the groove on the side of the boss close to the inside of the battery shell is provided with the ventilation groove, and the ventilation groove is connected to the first through hole.
  • the depth of the vent groove is H
  • the thickness of the boss is D
  • the vent groove is a trapezoidal groove
  • the trapezoidal groove includes a small end and a large end, the small end is the groove bottom of the vent groove, and the large end is the notch of the vent groove, and the notch of the vent groove is close to the interior of the battery shell.
  • the pole includes a pole body and a pressure plate connected to the pole body, the pressure plate is pressed against the side of the boss away from the top cover sheet, one end of the pole body passes through the mounting hole and the first through hole to be connected to the pressure plate, and the cavity is located between the pole body and the boss.
  • a groove is provided on a side of the boss close to the inside of the battery housing, the groove surrounds the first through hole, and a side of the pressing plate facing the boss is located in the groove.
  • the vent is connected to one side of the interior of the battery housing through the gap.
  • an embodiment of the present application further provides a battery, comprising a battery housing, at least one end of which is provided with an opening, and also comprising the above-mentioned battery top cover assembly, wherein the battery top cover assembly is sealed at the open end of the battery housing.
  • a vent hole or a vent groove is provided on the lower insulating member as a vent portion, and when the battery top cover assembly is subjected to helium detection, since the vent portion is respectively connected to the side of the lower insulating member close to the inside of the battery shell and the cavity for installing the sealing ring, the vent portion enables the compression part between the lower insulating member and the pole to have a space for gas circulation, thereby preventing the formation of a sealing surface between the lower insulating member and the pole from affecting the helium detection of the battery top cover assembly.
  • the gas can enter the cavity through the vent portion during helium detection, thereby improving the accuracy of helium detection, and being beneficial to improving the yield of the battery.
  • it is required that the part where the pole and the sealing ring are in direct contact is free of burrs.
  • the vent hole or the vent groove is provided on the lower insulating member, and the part in direct contact with the sealing ring will not be damaged or burrs will be formed during the processing of the vent portion, which is beneficial to improving the sealing performance of the sealing ring, preventing the battery top cover assembly from leaking, and reducing the processing difficulty of the vent portion.
  • FIG. 1 is a cross-sectional view of a battery top cover assembly provided in one embodiment of the present application.
  • FIG. 2 is an enlarged view of point A in FIG. 1 .
  • FIG. 3 is a structural diagram of a lower insulating member provided in an embodiment of the present application.
  • FIG. 4 is an enlarged view of point B in FIG. 3 .
  • FIG. 5 is a structural diagram of a lower insulating member provided in another embodiment of the present application.
  • Fig. 6 is a cross-sectional view taken along line C-C in Fig. 5 .
  • FIG. 7 is an enlarged view of point D in FIG. 6 .
  • FIG8 is a structural diagram of a lower insulating member provided in yet another embodiment of the present application.
  • FIG9 is an enlarged view of point E in FIG8 .
  • Top cover 11. Mounting hole; 2. Lower insulating member; 21. Vent hole; 22. Vent groove; 23. Boss; 24. First through hole; 25. Groove; 26. Gap; 3. Pole; 31. Pole body; 32. Pressing plate; 4. Cavity; 5. Sealing ring; 6. Upper insulating member; 7. Riveting block.
  • connection should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them.
  • a first feature being “above”, “above” and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.
  • a first feature being “below”, “below” and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
  • the present application provides a battery top cover assembly, which is mainly used in a battery.
  • the battery includes a battery housing and a battery top cover assembly, at least one end of the battery housing is provided with an opening, the battery cell is provided inside the battery housing, and the battery top cover assembly is provided at the open end of the battery housing to block the open end of the battery housing.
  • the battery top cover assembly includes a top cover sheet 1, a lower insulating member 2 and a pole 3, the lower insulating member 2 is stacked on the side of the top cover sheet 1 close to the inside of the battery shell, the top cover sheet 1 is provided with a mounting hole 11, the mounting hole 11 passes through the top and bottom of the top cover sheet 1, the lower insulating member 2 is provided with a first through hole 24, the first through hole 24 passes through the top and bottom of the lower insulating member 2 and corresponds to the mounting hole 11, one end of the pole 3 passes through the mounting hole 11 and the first through hole 24 in sequence and is pressed against the side of the lower insulating member 2 away from the top cover sheet 1, a cavity 4 for installing a sealing ring 5 is formed between the top cover sheet 1 and the pole 3, the cavity 4 is communicated with the outside, and a vent portion communicated with the cavity 4 is provided at the position where the lower insulating member 2 is pressed against the pole 3, the vent portion is a vent hole 21 or a vent groove 22, and the
  • a sealing ring 5 is provided in the gap between the side wall of the first through hole 24 and the pole 3 in the battery top cover assembly to prevent the electrolyte inside the battery shell from leaking to the outside of the battery.
  • a vent hole 21 or a vent groove 22 is provided on the lower insulating member 2 as a vent portion.
  • the vent portion is respectively connected with the side of the lower insulating member 2 close to the inside of the battery shell and the cavity 4 for installing the sealing ring 5, the vent portion allows the compressed part between the lower insulating member 2 and the pole 3 to have a space for gas circulation, thereby preventing the formation of a sealing surface between the lower insulating member 2 and the pole 3 from affecting the helium detection of the battery top cover assembly.
  • vent hole 21 or a vent groove 22 on the lower insulating member 2 as a vent portion, when the sealing ring 5 is missing or the sealing ring 5 fails, the gas can enter the cavity 4 through the vent portion during helium detection, thereby improving the accuracy of helium detection, which is beneficial to improving the yield of the battery.
  • the vent hole 21 or the vent groove 22 is set on the lower insulating part 2.
  • the part in direct contact with the sealing ring 5 will not be damaged or burred, which is beneficial to improving the sealing performance of the sealing ring, preventing leakage of the battery top cover assembly, and reducing the difficulty of processing the vent part.
  • vents there are at least two vents, and all the vents are spaced apart around the center line of the first through hole 24. At least two vents are provided, and when one of the vents fails during helium detection, ventilation can still be performed through the remaining vents.
  • two vents are provided.
  • vents are provided.
  • the number of the vents may also be set to one, three, five, six, etc., and the number of the vents is not specifically limited herein.
  • the lower insulating member 2 includes a boss 23, a first through hole 24 is provided on the boss 23, the lower end of the pole 3 is pressed against the boss 23, a vent 21 is provided on the boss 23, the vent 21 passes through the top and bottom of the boss 23, the vent portion is the vent 21, the vent 21 is connected with the first through hole 24, the vent 21 is provided on the boss 23 as the vent portion, and the processing difficulty of the vent portion is relatively small.
  • the lower insulating member 2 includes a boss 23, a first through hole 24 is provided on the boss 23, the lower end of the pole 3 is pressed against the boss 23, the vent portion is a vent groove 22, and a groove 25 on a side of the boss 23 close to the inside of the battery shell is provided with the vent groove 22, the vent groove 22 is connected with the first through hole 24, and by providing the vent groove 22 on the boss 23, since the vent groove 22 does not penetrate the side of the boss 23 away from the inside of the battery shell, the damage to the boss 23 is small, which is beneficial to maintaining the structural strength of the lower insulating member 2.
  • the depth of the vent groove 22 is H
  • the thickness of the boss 23 is D
  • the depth of the vent groove 22 is set to be greater than 0.1 mm.
  • the vent groove 22 is a trapezoidal groove, and the trapezoidal groove includes a small end and a large end, the small end of the trapezoidal groove is the groove bottom of the vent groove 22, and the large end of the trapezoidal groove is the notch of the vent groove 22, and the notch of the vent groove 22 is close to the inside of the battery shell.
  • the vent groove 22 is set to have a large structure at one end and a small structure at the other end. Since the large end of the vent groove 22 is the notch of the vent groove 22, it is easy to demold when processing the vent groove 22.
  • the pole 3 comprises a pole body 31 and a pressing plate 32 connected to the pole body 31, the pressing plate 32 is pressed on the side of the boss 23 away from the top cover sheet 1, one end of the pole body 31 passes through the mounting hole 11 and the first through hole 24 to connect with the pressing plate 32, the pole body 31 of this embodiment is integrally arranged with the pressing plate 32, and the cavity 4 is located between the pole body 31 and the boss 23.
  • the side of the pressing plate 32 close to the top cover sheet 1 abuts against the side of the boss 23 away from the top cover sheet 1, and the pressing plate 32 connected to the pole body 31 is provided to facilitate the assembly of the battery top cover assembly.
  • the sealing ring 5 is first assembled on the pole 3, and then the lower insulation and the top cover sheet 1 are assembled, and then the pole body 31 with the sealing ring 5 installed passes through the mounting hole 11 and the first through hole 24 in turn to connect with the pressing plate 32.
  • a groove 25 is provided on the side of the boss 23 close to the interior of the battery casing, the groove 25 surrounds the first through hole 24, and the side of the pressing plate 32 facing the boss 23 is located in the groove 25.
  • the lower insulating member 2 of this structure can accommodate part of the pressing plate 32 through the groove 25, so that the connection between the pressing plate 32 and the lower insulating member 2 is more compact.
  • the vent portion cannot communicate with the side of the lower insulating member 2 close to the inside of the battery housing.
  • the lower insulating member 2 is provided with a groove, there is a gap 26 between the pressing plate 32 and the groove sidewall of the groove 25, and the vent portion communicates with one side of the inside of the battery housing through the gap 26.
  • gas can enter the vent portion from the side of the lower insulating member 2 close to the inside of the battery housing.
  • the battery top cover assembly further includes an upper insulating member 6 disposed on the side of the top cover sheet 1 away from the lower insulating member 2.
  • the upper insulating member 6 is provided with a mounting groove, and a second through hole (not shown) directly opposite to the mounting hole 11 is provided at the bottom of the mounting groove.
  • One end of the pole body 31 passes through the second through hole, the mounting hole 11 and the first through hole 24 in sequence to be connected to the pressing plate 32, and the other end of the pole 3 is riveted in the mounting groove by a rivet block 7.
  • a battery comprising a battery housing and a battery top cover assembly of any of the above structures. At least one end of the battery housing is provided with an opening, and the battery top cover assembly is sealed at the open end of the battery housing.
  • the ventilation portion since the ventilation portion is respectively connected to the side of the lower insulating member 2 close to the inside of the battery housing and the cavity 4 for installing the sealing ring 5, the ventilation portion provides a space for gas circulation at the compression portion between the lower insulating member 2 and the pole 3, preventing the formation of a sealing surface between the lower insulating member 2 and the pole 3 from affecting the helium detection of the battery top cover assembly, thereby improving the yield of the battery.

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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)

Abstract

一种电池顶盖组件包括顶盖片（1）、下绝缘件（2）和极柱（3），顶盖片（1）设置有贯穿其顶部和底部的安装孔（11），下绝缘件（2）设置有贯穿其顶部和底部，并与安装孔（11）对应的第一通孔（24），极柱（3）的一端穿过安装孔（11）和第一通孔（24）压紧在下绝缘件（2）背离顶盖片（1）的一侧，顶盖片（1）与极柱（3）之间形成腔体（4），下绝缘件（2）与极柱（3）压紧的部位设置有通气部。

Description

电池顶盖组件及电池
本申请要求在2023年4月20日提交中国专利局、申请号为202320899689.0的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，例如涉及一种电池顶盖组件及包含此电池顶盖组件的电池。
 背景技术
随着碳中和需求的出现，电池行业蓬勃发展。顶盖组件是电池的重要部件之一，主要用于封堵在电池的外壳开口端。
顶盖组件包括盖板和绝缘支架，盖板贯穿其厚度方向相对侧设置有安装孔，极柱包括极柱本体和设置在极柱本体一端的压板，压板凸出于极柱本体的外周，绝缘支架设置在盖板靠近电池壳体内部的一侧，绝缘支架对应安装孔的部位贯穿设置有通孔，极柱本体依次穿过安装孔和通孔与压板连接，压板挤压在绝缘支架靠近电池壳体内部的一侧，为了防止电池壳体的内部与外部连通而导致漏液，会在盖板与极柱本体之间设置密封圈。
此种结构的顶盖组件，压板和绝缘支架会受压紧密结合形成密封部，气体不能从压板和绝缘支架之间的密封部通过，当顶盖组件漏装密封圈时，顶盖组件仍然可通过氦气检测，导致氦气检测的误判。
 发明内容
本申请提供了一种电池顶盖组件，其能够提升氦气检测的准确性。
本申请提供了一种电池，其良率高。
第一方面，本申请实施例提供了一种电池顶盖组件，包括顶盖片、下绝缘件和极柱，所述下绝缘件叠置在所述顶盖片靠近电池壳体的内部的一侧，所述顶盖片设置有安装孔，所述安装孔贯穿所述顶盖片的顶部和底部，所述下绝缘件设置有第一通孔，所述第一通孔贯穿所述下绝缘件的顶部和底部并与所述安装孔对应的，所述极柱的一端依次穿过所述安装孔和所述第一通孔压紧在所述下绝缘件背离所述顶盖片的一侧，所述顶盖片与所述极柱之间形成用于安装密封圈的腔体，所述下绝缘件与所述极柱压紧的部位设置有与所述腔体连通的通气部，所述通气部为通气孔或通气槽，所述通气部与所述下绝缘件背离顶盖片的一侧连通。
在一实施例中，所述通气部具有至少两个，所有的所述通气部分别绕所述第一通孔的中心线间隔分布。
在一实施例中，所述下绝缘件包括凸台，所述第一通孔开设在所述凸台上，所述极柱的下端与所述凸台压紧，述通气部为所述通气孔，所述凸台开设有所述通气孔，所述通气孔贯穿所述凸台的顶部和底部，所述通气孔与所述第一通孔连通。
在一实施例中，所述下绝缘件包括凸台，所述第一通孔开设在所述凸台上，所述极柱的下端与所述凸台压紧，所述通气部为所述通气槽，所述凸台靠近所述电池壳体内部的一侧面的凹槽设置有所述通气槽，所述通气槽与所述第一通孔连通。
在一实施例中，所述通气槽的深度为H，所述凸台的厚度为D，0.1mm≤H＜D。
在一实施例中，所述通气槽为梯形槽，所述梯形槽包括小端部和大端部，所述小端部为所述通气槽的槽底，所述大端部为所述通气槽的槽口，所述通气槽的槽口靠近所述电池壳体内部。
在一实施例中，所述极柱包括极柱本体和与所述极柱本体连接的压板，所述压板压紧在所述凸台背离所述顶盖片的一侧，所述极柱本体的一端穿过所述安装孔和所述第一通孔与所述压板连接，所述腔体位于所述极柱本体与所述凸台之间。
在一实施例中，所述凸台靠近所述电池壳体内部一侧设置有凹槽，所述凹槽环绕所述第一通孔，所述压板朝向所述凸台的一侧位于所述凹槽内。
在一实施例中，所述压板与所述凹槽的槽侧壁之间具有间隙，所述通气部通过所述间隙与所述电池壳体内部的一侧连通。
第二方面，本申请实施例还提供了一种电池，包括电池壳体，所述电池壳体的至少一端设置有开口，还包括上述的电池顶盖组件，所述电池顶盖组件密封设置在所述电池壳体的开口端。
本申请的有益效果为：在下绝缘件上设置通气孔或通气槽作为通气部，对电池顶盖组件进行氦气检测时，由于通气部分别与下绝缘件靠近电池壳体内部的一侧和用于安装密封圈的腔体连通，通气部使下绝缘件和极柱之间的压紧部位具有气体流通的空间，防止下绝缘件和极柱之间形成密封面影响电池顶盖组件的氦气检测。通过在下绝缘件上设置通气孔或通气槽作为通气部，密封圈漏装或密封圈失效的情况下，氦气检测时气体可以通过通气部进入到腔体中，提高氦气检测的准确度，有利于提高电池的良率。为了保持密封圈的密封性，要求极柱与密封圈直接接触的部位无毛刺，本方案中将通气孔或通气槽设置在下绝缘件上，加工通气部的过程中不会对与密封圈直接接触的部位造成损伤出现毛刺，有利于提升密封圈的密封性能，防止电池顶盖组件漏液，以及有利于降低通气部的加工难度。
 附图说明
下面根据附图和实施例对本申请作进一步详细说明。
图1为本申请一实施例提供的电池顶盖组件的剖视图。
图2为图1中A处放大图。
图3为本申请一实施例提供的下绝缘件的结构图。
图4为图3中B处放大图。
图5为本申请另一实施例提供的下绝缘件的结构图。
图6为图5中C-C剖视图。
图7为图6中D处放大图。
图8为本申请再一实施例提供的下绝缘件的结构图。
图9为图8中E处放大图。
图中：
1、顶盖片；11、安装孔；2、下绝缘件；21、通气孔；22、通气槽；23、凸台；24、第一通孔；25、凹槽；26、间隙；3、极柱；31、极柱本体；32、压板；4、腔体；5、密封圈；6、上绝缘件；7、铆接块。
 实施方式
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；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或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
本申请提供一种电池顶盖组件，该电池顶盖组件主要应用在电池中。本说明书中，结合电池详细描述电池顶盖组件的具体结构。电池包括电池壳体和电池顶盖组件，电池壳体的至少一端设置有开口，电芯设置在电池壳体内部，电池顶盖组件设置在电池壳体的开口端，以封堵电池壳体的开口端。参照图1至图4、图8和图9，电池顶盖组件包括顶盖片1、下绝缘件2和极柱3，下绝缘件2叠置在顶盖片1靠近电池壳体的内部的一侧，顶盖片1设置有安装孔11，安装孔11贯穿顶盖片1的顶部和底部，下绝缘件2设置有第一通孔24，第一通孔24贯穿下绝缘件2的顶部和底部，并与安装孔11对应，极柱3的一端依次穿过安装孔11和第一通孔24压紧在下绝缘件2背离顶盖片1的一侧，顶盖片1与极柱3之间形成用于安装密封圈5的腔体4，腔体4与外界连通，下绝缘件2与极柱3压紧的部位设置有与腔体4连通的通气部，通气部为通气孔21或通气槽22，通气部与下绝缘件2背离顶盖片1的一侧（即绝缘件2靠近电池壳体内部的一侧）连通。需要说明的是，本说明书中“外界”指的是电池顶盖组件外部和电池壳体外部的部位。
为了密封第一通孔24侧壁与极柱3之间的缝隙，电池顶盖组件中位于第一通孔24侧壁与极柱3之间的缝隙中会设置密封圈5密封，防止电池壳体内部的电解液泄漏至电池的外部。
在下绝缘件2上设置通气孔21或通气槽22作为通气部，对电池顶盖组件进行氦气检测时，由于通气部分别与下绝缘件2靠近电池壳体内部的一侧和用于安装密封圈5的腔体4连通，通气部使下绝缘件2和极柱3之间的压紧部位具有气体流通的空间，防止下绝缘件2和极柱3之间形成密封面影响电池顶盖组件的氦气检测。通过在下绝缘件2上设置通气孔21或通气槽22作为通气部，密封圈5漏装或密封圈5失效的情况下，氦气检测时气体可以通过通气部进入到腔体4中，提高氦气检测的准确度，有利于提高电池的良率。为了保持密封圈5的密封性，要求极柱3与密封圈5直接接触的部位无毛刺，本方案中将通气孔21或通气槽22设置在下绝缘件2上，加工通气部的过程中不会对与密封圈5直接接触的部位造成损伤出现毛刺，有利于提升密封圈的密封性能，防止电池顶盖组件漏液，以及有利于降低通气部的加工难度。
在一实施例中，通气部具有至少两个，所有的通气部分别绕第一通孔24的中心线间隔分布。设置至少两个通气部，氦气检测时在其中一个通气部失效的情况下，依然可以通过其余的通气部通气。
一示例中，参照图5，通气部设置有两个。
另一示例中，参照图3和图8，通气部设置有四个。
其他的示例中，通气部的数量也可以设置为一个、三个、五个或六个等，在此并不对通气部的数量作具体限制。
一实施例中的电池顶盖组件，参照图8和图9，下绝缘件2包括凸台23，第一通孔24开设在凸台23上，极柱3的下端与凸台23压紧，凸台23开设有通气孔21，通气孔21贯穿凸台23的顶部和底部，通气部为通气孔21，通气孔21与第一通孔24连通，在凸台23上设置通气孔21为通气部，通气部的加工难度较小。
另一实施例中的电池顶盖组件中，参照图1至图7，下绝缘件2包括凸台23，第一通孔24开设在凸台23上，极柱3的下端与凸台23压紧，通气部为通气槽22，凸台23靠近电池壳体内部的一侧面的凹槽25设置有通气槽22，通气槽22与第一通孔24连通，通过在凸台23上设置通气槽22，由于通气槽22并未贯穿凸台23背离电池壳体内部的一侧面，因此对凸台23的损伤较小，有利于保持下绝缘件2的结构强度。
在一实施例中，通气槽22的深度为H，凸台23的厚度为D，0.1mm≤H＜D，设置通气槽22的深度大于0.1mm，氦气检测时，保证通气槽22具有足够的空间通过气体。
在一实施例中，通气槽22为梯形槽，所述梯形槽包括小端部和大端部，梯形槽的小端部为通气槽22的槽底，梯形槽的大端部为通气槽22的槽口，通气槽22的槽口靠近电池壳体内部。设置通气槽22为一端大一端小结构，由于通气槽22的大端部为通气槽22的槽口，加工通气槽22时便于脱模。
其中，参照图1和图2，极柱3包括极柱本体31和与极柱本体31连接的压板32，压板32压紧在凸台23背离顶盖片1的一侧，极柱本体31的一端穿过安装孔11和第一通孔24与压板32连接，本实施例的极柱本体31与压板32一体设置，腔体4位于极柱本体31与凸台23之间。压板32靠近顶盖片1的一侧面与凸台23背离顶盖片1的一侧抵接，通过设置与极柱本体31连接的压板32，便于组装电池顶盖组件。电池顶盖具体实施组装时，先将密封圈5组装在极柱3上，然后组装下绝缘和顶盖片1，再将装好密封圈5的极柱本体31依次穿过安装孔11和第一通孔24与压板32连接。
在一实施例中，参照图6，凸台23靠近电池壳体内部一侧设置有凹槽25，凹槽25环绕第一通孔24，压板32朝向凸台23的一侧位于凹槽25内，此种结构的下绝缘件2可以通过凹槽25容纳部分压板32，使压板32与下绝缘件2的连接更加紧凑。
可以理解的是，压板32的周部与凹槽25的槽侧壁抵紧的情况下，通气部与下绝缘件2靠近电池壳体内部的一侧无法连通。在下绝缘件2设置有凹槽的情况下，压板32与凹槽25的槽侧壁之间具有间隙26，通气部通过该间隙26与电池壳体内部的一侧连通，氦气检测时气体能够从下绝缘件2靠近电池壳体内部的一侧进入到通气部内。
参照图1，电池顶盖组件还包括设置在顶盖片1背离下绝缘件2一侧的上绝缘件6，上绝缘件6设置有安装槽，安装槽的槽底设置有与安装孔11正对的第二通孔（图中未标出），极柱本体31的一端依次穿过第二通孔、安装孔11和第一通孔24与压板32连接，极柱3的另一端通过铆接块7铆接在安装槽内。
再一实施例中，还提供一种电池，电池包括电池壳体和上述任一种结构的电池顶盖组件。电池壳体的至少一端设置有开口，电池顶盖组件密封设置在电池壳体的开口端。此种结构的电池，由于通气部分别与下绝缘件2靠近电池壳体内部的一侧和用于安装密封圈5的腔体4连通的，通气部位使下绝缘件2和极柱3之间的压紧部位提供气体流通的空间，防止下绝缘件2和极柱3之间形成密封面影响电池顶盖组件的氦气检测，从而提升电池的良率。
于本文的描述中，需要理解的是，术语“上”、“下”、“左”、“右”、等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，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申请的限制。此外，术语“第一”、“第二”仅仅用于在描述上加以区分，并没有特殊的含义。
在本说明书的描述中，参考术语“一实施例”、“示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。
此外，应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，多个实施例中的技术方案也可以适当组合，形成本领域技术人员可以理解的其他实施方式。

Claims (10)

  1. 一种电池顶盖组件，包括顶盖片、下绝缘件和极柱，所述下绝缘件叠置在所述顶盖片靠近电池壳体的内部的一侧；
    所述顶盖片设置有安装孔，所述安装孔贯穿所述顶盖片的顶部和底部；
    所述下绝缘件设置有第一通孔，所述第一通孔贯穿所述下绝缘件的顶部和底部并与所述安装孔对应；
    所述极柱的一端依次穿过所述安装孔和所述第一通孔，并压紧在所述下绝缘件背离所述顶盖片的一侧；
    所述顶盖片与所述极柱之间形成用于安装密封圈的腔体；
    所述下绝缘件与所述极柱压紧的部位设置有与所述腔体连通的通气部，所述通气部为通气孔或通气槽，所述通气部与所述下绝缘件背离顶盖片的一侧连通。
  2. 根据权利要求1所述的电池顶盖组件，其中，所述通气部具有至少两个，所有的所述通气部分别绕所述第一通孔的中心线间隔分布。
  3. 根据权利要求1所述的电池顶盖组件，其中，所述下绝缘件包括凸台，所述第一通孔开设在所述凸台上，所述极柱的下端与所述凸台压紧，所述通气部为所述通气孔，所述凸台开设有所述通气孔，所述通气孔贯穿所述凸台的顶部和底部，所述通气孔与所述第一通孔连通。
  4. 根据权利要求2所述的电池顶盖组件，其中，所述下绝缘件包括凸台，所述第一通孔开设在所述凸台上，所述极柱的下端与所述凸台压紧，所述通气部为所述通气槽，所述凸台靠近所述电池壳体内部的一侧面的凹槽设置有所述通气槽，所述通气槽与所述第一通孔连通。
  5. 根据权利要求4所述的电池顶盖组件，其中，所述通气槽的深度为H，所述凸台的厚度为D，0.1mm≤H＜D。
  6. 根据权利要求4所述的电池顶盖组件，其中，所述通气槽为梯形槽，所述梯形槽包括小端部和大端部，所述小端部为所述通气槽的槽底，所述大端部为所述通气槽的槽口，所述通气槽的槽口靠近所述电池壳体内部。
  7. 根据权利要求3或4所述的电池顶盖组件，其中，所述极柱包括极柱本体和与所述极柱本体连接的压板，所述压板压紧在所述凸台背离所述顶盖片的一侧，所述极柱本体的一端穿过所述安装孔和所述第一通孔，并与所述压板连接，所述腔体位于所述极柱本体与所述凸台之间。
  8. 根据权利要求7所述的电池顶盖组件，其中，所述凸台靠近所述电池壳体内部一侧设置有凹槽，所述凹槽环绕所述第一通孔，所述压板朝向所述凸台的一侧位于所述凹槽内。
  9. 根据权利要求8所述的电池顶盖组件，其中，所述压板与所述凹槽的槽侧壁之间具有间隙，所述通气部通过所述间隙与所述电池壳体内部连通。
  10. 一种电池，包括电池壳体，所述电池壳体的至少一端设置有开口，所述电池还包括权利要求1至9任一项所述的电池顶盖组件，所述电池顶盖组件密封设置在所述电池壳体的开口端。
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