WO2022078034A1 - 端盖组件、电池单体、电池以及用电装置 - Google Patents

端盖组件、电池单体、电池以及用电装置 Download PDF

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Publication number
WO2022078034A1
WO2022078034A1 PCT/CN2021/111618 CN2021111618W WO2022078034A1 WO 2022078034 A1 WO2022078034 A1 WO 2022078034A1 CN 2021111618 W CN2021111618 W CN 2021111618W WO 2022078034 A1 WO2022078034 A1 WO 2022078034A1
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WO
WIPO (PCT)
Prior art keywords
end cap
hole
cap assembly
blocking member
assembly according
Prior art date
Application number
PCT/CN2021/111618
Other languages
English (en)
French (fr)
Inventor
康文龙
张小平
邢承友
Original Assignee
江苏时代新能源科技有限公司
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 江苏时代新能源科技有限公司 filed Critical 江苏时代新能源科技有限公司
Priority to JP2022562349A priority Critical patent/JP2023521206A/ja
Priority to EP21879081.4A priority patent/EP4109642A4/en
Publication of WO2022078034A1 publication Critical patent/WO2022078034A1/zh
Priority to US18/058,761 priority patent/US20230112464A1/en

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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
    • 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
    • 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
    • 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
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • 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
    • H01M10/4228—Leak testing of cells or batteries
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • H01M50/645—Plugs
    • 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 technical field of energy storage, and in particular, to an end cap assembly, a battery cell, a battery, and an electrical device.
  • Embodiments of the present application provide an end cap assembly, a battery cell, a battery, and an electrical device, and the end cap assembly can meet the sealing requirements of the battery cell.
  • an end cap assembly is provided for a battery cell, the end cap assembly includes: an end cap provided with a through hole; a sealing member for sealing the through hole, and the sealing member is connected to the end cap The cover forms the connection position; the blocking member is disposed in the through hole and a channel is formed between at least part of the blocking member and the side wall of the through hole, and the channel is used for guiding the fluid in the battery cell to the connection position.
  • the fluid inside the battery cell can flow to the connection position through the channel.
  • the fluid inside the battery cell can be detected to feed back whether there is leakage between the seal and the end cap, so as to take measures for the leaked end cap assembly before leaving the factory remedy.
  • This arrangement can better ensure the sealing of the end cap assembly and meet the sealing requirements of the battery cells.
  • a surface of the blocking member facing the side wall is provided with a first notch, and a channel is formed between the first notch and the side wall.
  • the cross-sectional area of the channel decreases along the axial direction of the through hole and toward the side of the through hole close to the seal.
  • the through hole has two opposite ports in its axial direction, and the first notch always penetrates the two ports.
  • the blocking member includes a first part and a second part that are arranged in succession, the first part is located in the through hole, the first gap is arranged in the first part, and the second part protrudes from the end cap.
  • the blocking member adopts the above-mentioned structural form, and on the basis of ensuring that the blocking member can form a channel with the side wall of the through hole, the blocking member has a simple structure, is easy to form, and is easy to disassemble and assemble in the through hole.
  • the second part is provided with a second gap, and the second gap communicates with the first gap.
  • the provision of the second notch enables the blocking member to be positioned in a predetermined direction in the receiving box (ie, before mating with the through holes of each end cap), which is convenient for the manipulator to grab and install into the through holes.
  • the provision of the second notch can facilitate the entry of fluid into the channel.
  • the arrangement of the second notch can further make the radial dimension of the second part smaller than the radial dimension of the first part, which facilitates the assembly of the blocking member.
  • the surface on which the first notch is formed is a plane surface, or the surface on which the first notch is formed is an arc surface.
  • the surface of the first notch is flat, it can be formed by cutting along a predetermined direction, which is easy to form.
  • the surface of the first notch is an arc surface, on the basis of meeting the size requirements of the channel, the contact area between the blocking member and the wall surface of the through hole can be ensured, and the connection strength between the blocking member and the end cap can be ensured.
  • the end cap is further provided with a concave portion, the concave portion is disposed opposite to and communicated with the through hole, and the concave portion is used for accommodating the sealing member.
  • a battery cell comprising: a casing having an inner space and an opening communicating with the inner space; and the above-mentioned end cap assembly, wherein the end cap assembly closes the opening, and a channel communicates with the inner space.
  • the battery cells provided according to the embodiments of the present application include the end cap assemblies provided in the above embodiments, and the channels are arranged so that the fluid inside the battery cells can flow to the connection position through the channels.
  • the fluid inside the battery cell can be detected to feedback whether there is leakage between the seal and the end cap, so as to take measures for the leaked battery cell before leaving the factory Remedial measures to ensure the sealing of battery cells.
  • a battery is provided according to an embodiment of the present application, including the above-mentioned battery cell.
  • the batteries provided according to the embodiments of the present application including the battery cells provided by the above embodiments, have good sealing performance and high safety.
  • an electrical device including the above-mentioned battery cell, and the battery cell is used to provide electrical energy.
  • the electrical device provided according to the embodiment of the present application including the battery cell provided by the above-mentioned embodiment, has good sealing performance and high safety.
  • FIG. 1 is a schematic structural diagram of a vehicle according to an embodiment of the present application.
  • FIG. 2 is an exploded schematic view of a battery according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a battery module according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an exploded structure of a battery cell according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of an end cap assembly according to an embodiment of the present application.
  • FIG. 6 is an exploded schematic view of an end cap assembly according to an embodiment of the present application.
  • FIG. 7 is a top view of an end cap assembly according to an embodiment of the present application.
  • Figure 8 is a cross-sectional view along the A-A direction in Figure 7;
  • Fig. 9 is an enlarged view at B in Fig. 8;
  • FIG. 10 is a partial cross-sectional view of an end cap according to an embodiment of the present application.
  • Fig. 11 is a partial cross-sectional view of a blocking member of an end cap assembly in cooperation with an end cap according to another embodiment of the present application;
  • FIG. 12 is a partial cross-sectional view of the blocking member of the end cap assembly in cooperation with the end cap according to another embodiment of the present application;
  • FIG. 13 is a schematic structural diagram of a blocking member according to an embodiment of the present application.
  • FIG. 14 is a side view of a blocking member according to an embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of a blocking member according to another embodiment of the present application.
  • 16 is a side view of a blocking member of another embodiment of the present application.
  • FIG. 17 is a top view of a blocking member according to another embodiment of the present application.
  • FIG. 18 is a top view of a blocking member according to yet another embodiment of the present application.
  • the applicant conducts research and analysis on the various structures of the battery cells and finds that the end caps of the end cap assemblies usually require Provide through holes to meet requirements such as liquid injection or venting.
  • a blocking member and a sealing member are usually provided for the sealing of the through hole.
  • the blocking member is inserted into the through hole of the end cap assembly to make the through hole in a sealed state, and then the sealing member is placed at one end of the through hole and welded with the end cap assembly. Achieve double sealing of through holes. Through the helium inspection process, it is tested whether the welding between the seal and the end cap is reliable. The above arrangement will cause a problem.
  • the applicant has improved the structure of the end cap assembly of the battery cell to meet the sealing requirements of the battery cell.
  • An embodiment of the present application provides an electrical device using a battery as a power source.
  • the electrical device can be, but not limited to, a vehicle, a ship, or an aircraft.
  • an embodiment of the present application provides a vehicle 1 .
  • the vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles.
  • the vehicle 1 may include a motor 1 a , a controller 1 b and a battery 10 .
  • the controller 1b is used to control the battery 10 to supply power to the motor 1a.
  • the motor 1a is connected to the wheels through a transmission mechanism, thereby driving the vehicle 1 to travel.
  • the battery 10 can be used as a driving power source of the vehicle 1 to provide driving power for the vehicle 1 in place of or partially in place of fuel or natural gas.
  • the battery 10 may be provided at the bottom or at the front or rear of the vehicle 1 .
  • the battery 10 may be used to power the vehicle 1 .
  • the battery 10 may be used as the operating power source of the vehicle 1 for the electrical system of the vehicle 1 .
  • the battery 10 may be used for the operating power requirements of the vehicle 1 for starting, navigating, and operating.
  • the battery 10 may include more than two battery modules 20 .
  • the battery 10 further includes a case 11 .
  • the battery module 20 is disposed in the box body 11 .
  • Two or more battery modules 20 are arranged in the box 11 .
  • the type of the case 11 is not limited.
  • the case 11 may be a frame-shaped case, a disc-shaped case, a box-shaped case, or the like.
  • the box 11 includes a first box 111 for accommodating the battery module 20 and a second box 112 covered with the first box 111 .
  • the second box body 112 and the first box body 111 are closed to form an accommodation cavity for accommodating the battery module 20 .
  • the battery 10 may also include a battery module 20 .
  • the battery 10 includes a case 11 and a plurality of battery cells directly disposed in the case 11 .
  • the battery module 20 includes more than two battery cells 30 .
  • the battery module 20 includes an accommodating portion (not shown in the figure) and two or more battery cells 30 located in the accommodating portion. Two or more battery cells 30 are arranged side by side in the accommodating portion.
  • the accommodating part can be arranged in various ways.
  • the accommodating part includes a casing and a cover plate covering the casing.
  • the accommodating portion includes side panels and end panels that are enclosed and connected in succession.
  • the accommodating part includes opposite end plates and a band surrounding the end plates and the outside of the battery cells 30 .
  • the battery cell 30 of the embodiment of the present application includes a casing 31 and an electrode assembly 32 disposed in the casing 31 .
  • the casing 31 in the embodiment of the present application is a square, a round shell or other shapes.
  • the case 31 has an inner space that accommodates the electrode assembly 32 and the electrolyte, and an opening communicating with the inner space.
  • the housing 31 may be made of materials such as aluminum, aluminum alloy, steel, or plastic.
  • the electrode assembly 32 of the embodiment of the present application may be formed by stacking or winding the first pole piece, the second pole piece and the separator between the first pole piece and the second pole piece, wherein the separator is interposed between the first pole piece and the second pole piece. an insulator between the pole piece and the second pole piece.
  • the first pole piece is exemplified as a positive electrode piece
  • the second pole piece is a negative electrode piece for description.
  • Both the positive electrode sheet and the negative electrode sheet include a coated area and an uncoated area, the positive electrode sheet active material is coated on the coated area of the positive electrode sheet, and the negative electrode sheet active material is coated on the negative electrode sheet coated area.
  • the electrode assembly 32 also includes two tabs 322, a positive tab and a negative tab.
  • the coated area of the positive electrode sheet and the coated area of the negative electrode sheet form the main body part 321 .
  • the uncoated regions of the positive sheet are stacked to form the positive tabs, and the uncoated regions of the negative tabs are stacked to form the negative tabs.
  • the main body portion 321 has two oppositely disposed end surfaces along the height direction, and the positive electrode tab and the negative electrode tab can respectively extend from one end surface of the main body portion 321 .
  • the battery cell 30 of the embodiment of the present application further includes an end cap assembly 40 that is sealedly connected to the housing 31 .
  • the end cap assembly 40 includes an end cap 41, an electrode terminal 45, a sealing member 42, and a blocking member 43.
  • the electrode terminal 45 can be electrically connected to the tab 322 of the electrode assembly 32 , and the electrode terminal 45 is disposed on the end cap 41 .
  • the outer shape of the electrode terminal 45 may be circular or square, which is not limited here.
  • the end cap 41 is provided with a through hole 411 , the sealing member 42 is used for sealing the through hole 411 , and the sealing member 42 is connected to the end cap 41 and forms a connection position 46 .
  • the blocking member 43 is disposed in the through hole 411 and a channel 44 is formed between at least part of the blocking member 43 and the side wall of the through hole 411 , and the channel 44 is used for guiding the fluid in the battery cell 30 to the connection position 46 .
  • the end cap assembly 40 When the end cap assembly 40 provided in the embodiment of the present application is used for the battery cell 30 , the end cap assembly 40 can close the opening of the casing 31 , and specifically can be sealed with the casing 31 through the end cap 41 .
  • the through holes 411 on the end caps 41 can be used for injecting electrolyte or discharging gas in the battery cells 30 .
  • the blocking member 43 is located in the through hole 411 and can form a channel 44 with the side wall of the through hole 411 , and the channel 44 communicates with the inner space of the housing 31 .
  • the blocking member 43 can partially block the fluid inside the battery cell 30 .
  • the arrangement of the channel 44 enables the fluid inside the battery cell 30 to flow to the connection position 46 through the channel 44 and be detected when leakage occurs at the connection position 46 between the sealing member 42 and the end cap 41, so as to feedback the sealing member 42 and the end cap Whether leakage occurs between 41 can better ensure the sealing of the end cap assembly 40 and meet the sealing requirements of the battery cells 30 .
  • a certain amount of helium gas can be injected into the interior of the battery cell 30.
  • the connection position 46 between the sealing member 42 and the end cap 41 leaks due to weak welding or other reasons, the helium gas will pass through the blocking member 43 and communicate with the passageway.
  • the channel 44 formed between the side walls of the hole 411 flows to the connection location 46 .
  • the leaked position of the connection position 46 can be detected by the detection equipment, and re-welding or other remedial measures can be taken to ensure the sealing performance of the connection position 46 between the sealing member 42 and the end cover 41, thereby ensuring the safety of the battery cell 30. and service life.
  • the channel 44 is formed between the blocking member 43 and the side wall of the through hole 411 , so that the channel 44 is easy to be processed and formed, and the strength loss of the blocking member 43 is small. 43 is not easily deformed. The blocking phenomenon of the channel 44 caused by the deformation of the blocking member 43 is effectively avoided, thereby ensuring the accuracy of the detection of the sealing performance of the connection position 46 between the sealing member 42 and the end cover 41 .
  • the cross-sectional area of the channel 44 decreases along the axial direction X of the through hole 411 and toward the side of the through hole 411 close to the seal 42 .
  • the cross-sectional area of the channel 44 may gradually decrease.
  • the cross-sectional area of the channel 44 can be reduced section by section along the axial direction X of the through hole 411 and toward the side of the through hole 411 close to the seal 42 , which can also The decreasing requirements for the cross-sectional area of the channel 44 are met.
  • the end cap 41 of the end cap assembly 40 may further be provided with a recess 412 , and the recess 412 is arranged opposite to the through hole 411 and is connected to the through hole 411 .
  • the holes 411 communicate with each other.
  • the concave portion 412 may be disposed opposite the through hole 411 in the axial direction X of the through hole 411 , and the concave portion 412 is used for accommodating the sealing member 42 .
  • the concave portion 412 By providing the concave portion 412 , the installation of the sealing member 42 and the connection between the sealing member 42 and the end cover 41 are facilitated, and the connection position 46 is formed, which facilitates the sealing of the through hole 411 .
  • the sealing member 42 does not need to protrude from the end cap 41 , and the overall thickness of the end cap assembly 40 can be reduced.
  • the side of the sealing member 42 close to the blocking member 43 may be provided with an avoidance groove 421.
  • the sealing member 42 can avoid interference with the blocking member 43 during assembly, which is beneficial to sealing Assembly of parts 42.
  • the surface of the blocking member 43 facing the side wall of the through hole 411 may be provided with The first notch 433 forms a channel 44 between the first notch 433 and the side wall.
  • the first notch 433 can also be provided on the side wall of the through hole 411, which can also prevent the blocking member 43 from being completely fitted with the side wall of the through hole 411, and can also meet the requirement of forming the channel 44 therebetween.
  • the through hole 411 has two opposite ports in the axial direction X thereof, and the first gap 433 always penetrates through the two ports.
  • the blocking member 43 may include a first portion 431 and a second portion 432 that are successively disposed, the first portion 431 is located in the through hole 411 and the first gap 433 is disposed in the first portion 431 , the second part 432 protrudes from the end cover 41 and is disposed.
  • the blocking member 43 adopts the above-mentioned structural form, and on the basis of ensuring the requirement that the blocking member 43 can form the channel 44 between the side wall of the through hole 411 , the blocking member 43 can also have a simple structure, be easy to form, and is convenient for the through hole 411 . Internal disassembly.
  • the first part 431 and the second part 432 of the blocking member 43 may be successively arranged in the axial direction X of the through hole 411 .
  • both the first part 431 and the second part 432 may be columnar bodies, and the shape of the first part 431 and the cross-sectional shape of the through hole 411 may at least partially match.
  • the through hole 411 may be a circular hole
  • the first part 431 may be a cylinder matching the shape of the through hole 411
  • the first notch 433 is provided on the surface of the first part 431 facing the side wall of the through hole 411
  • the blocking member 43 The remaining part of the surface of the through hole 411 can be closely attached to the side wall of the through hole 411 to ensure the stability of the connection between the blocking member 43 and the through hole 411 .
  • the shape of the second portion 432 may also be a cylinder.
  • the second part 432 and the first part 431 may be coaxially disposed.
  • the radial dimension of the second portion 432 can be made smaller than the radial dimension of the first portion 431 , which can facilitate the flow of fluid from the channel 44 to the connection position 46 .
  • first part 431 and the second part 432 are both cylinders is only an implementation manner, but is not limited to the above manner.
  • first part 431 and the second part 432 can also be made of four Other polygonal cylinders such as prisms and pentagonal cylinders, for example, regular polygonal cylinders, can be used as long as the requirements for forming the channel 44 can be met.
  • the second portion 432 when the blocking member 43 includes the second portion 432 , the second portion 432 may be provided with a second notch 434 , and the second notch 434 communicates with the first notch 433 .
  • the setting of the second notch 434 enables the blocking member 43 to be positioned in a predetermined direction in the receiving box (ie, before mating with the through hole 411 of each end cover 41 ), which is convenient for the manipulator to grab and install into the through hole 411 .
  • the provision of the second notch 434 may facilitate fluid entry into the channel 44 .
  • the arrangement of the second notch 434 can also make the radial dimension of the second portion 432 further smaller than the radial dimension of the first portion 431 , which facilitates the assembly of the blocking member 43 .
  • one end of the second portion 432 away from the first portion 431 has a tapered structure, so that the blocking member 43 can be inserted into the through hole 411 .
  • the surface of the blocking member 43 forming the first gap 433 may be a plane, and may be along the axial direction of the through hole 411 .
  • X is directly cut and formed.
  • the surface of the blocking member 43 on which the second notch 434 is formed may also be a plane, and the second notch 434 communicates with the first notch 433 .
  • the surface of the blocking member 43 on which the first notch 433 is formed may be an arc surface, and the corresponding surface on which the second notch 434 is formed may also be an arc surface or a flat surface.
  • the requirements for the formation of the channel 44 to direct the fluid to the connection location 46 can be met.
  • the number of the first notches 433 included in the blocking member 43 may be one, and at this time, the number of the second notches 434 may also be one, and the number of the second notches 434 may also be one and be opposite to the first notches 433. interconnected.
  • the number of the first notches 433 included in the blocking member 43 may also be two or more, and the two or more first notches 433 are spaced apart in the circumferential direction of the through hole 411 set up.
  • connection bits 46 are formed everywhere.
  • the number of the second notches 434 may be the same as the number of the first notches 433 and are arranged opposite to each other, and the first notches 433 and the second notches 433 are oppositely arranged.
  • the notches 434 communicate with each other.
  • the end cap assembly 40 When the end cap assembly 40 provided in the embodiment of the present application is used for the battery cell 30, the end cap 41 can be sealed with the casing 31 of the battery cell 30. After the formation stage of the battery cell 30, a negative pressure is applied. The equipment is under negative pressure. After the negative pressure is completed, a certain amount of helium gas is injected into the battery cell 30, the blocking member 43 is inserted into the through hole 411, and the sealing member 42 is connected with the end cap 41. For example, laser welding can be used. Since the blocking member 43 The channel 44 formed between the side wall of the through hole 411 and the channel 44 communicates with the connection position 46 formed between the sealing member 42 and the end cap 41, which can guide the helium gas inside the battery cell 30 to the connection position 46.
  • connection position 46 when the connection position 46 has leakage caused by weak welding and other reasons, it can be detected through the helium detection process, so that remedial measures can be taken for the end cap assembly 40 that has leaked before leaving the factory to ensure that the battery cells that leave the factory are 30 sealing performance, thereby improving its safety level and service life.

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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)
  • Battery Mounting, Suspending (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Filling, Topping-Up Batteries (AREA)

Abstract

本申请实施例提供一种端盖组件、电池单体、电池以及用电装置，端盖组件用于电池单体，包括：端盖，设置有通孔；密封件，用于密封通孔，且密封件连接于端盖并形成连接位；阻挡件，设置于通孔且至少部分阻挡件与通孔的侧壁之间形成有通道，通道用于将电池单体内的流体引导至连接位。本申请实施例提供的端盖组件、电池单体、电池以及用电装置，端盖组件能够满足电池单体的密封要求，保证电池单体的安全性能以及使用寿命。

Description

端盖组件、电池单体、电池以及用电装置
相关申请的交叉引用
本申请要求享有于2020年10月13日提交的名称为“端盖组件、电池单体、电池以及用电装置”的中国专利申请202022269855.8的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及储能技术领域，特别是涉及一种端盖组件、电池单体、电池以及用电装置。
背景技术
由于可充放电的电池单体具有能量密度高、功率密度高、循环使用次数多、存储时间长等优点，在电动汽车上面已普遍应用。目前，电池单体的密封性能制约着电池单体发展，因此对电池单体密封性能的相关技术研究成为研究课题之一。
发明内容
本申请实施例提供一种端盖组件、电池单体、电池以及用电装置，端盖组件能够满足电池单体的密封要求。
一方面，根据本申请实施例提出了一种端盖组件，用于电池单体，端盖组件包括：端盖，设置有通孔；密封件，用于密封通孔，且密封件连接于端盖并形成连接位；阻挡件，设置于通孔且至少部分阻挡件与通孔的 侧壁之间形成有通道，通道用于将电池单体内的流体引导至连接位。
通过上述设置，可以使得电池单体内部的流体能够通过通道流向连接位。当密封件与端盖之间的连接位发生泄漏时，电池单体内部的流体能够被检测，以反馈密封件与端盖之间是否发生泄漏，以在出厂前对于发生泄漏的端盖组件采取补救措施。这种设置能更好的保证端盖组件的密封性，满足电池单体的密封要求。
根据本申请实施例的一个方面，阻挡件面向侧壁的表面设置有第一缺口，第一缺口与侧壁之间形成通道。通过上述设置，使得通道易于加工形成，并能够使得阻挡件的强度损失小，阻挡件不易变形，有效的避免因阻挡件变形而导致通道堵塞现象的发生，进而保证对密封件与端盖之间连接位的密封性能检测的准确性。
根据本申请实施例的一个方面，沿通孔的轴向且向通孔靠近密封件的一侧，通道的横截面积递减。通过上述设置，能够尽可能增大通道的下端开口，利于流体流动至连接位，同时能够保证阻挡件与通孔配合的稳定性。
根据本申请实施例的一个方面，通孔在自身轴向具有两个相对的端口，第一缺口始终贯穿两个端口。通过上述设置，能够保持通道的畅通性，保证流体能够通过通道流向密封件与端盖之间的连接位。
根据本申请实施例的一个方面，阻挡件包括相继设置的第一部分以及第二部分，第一部分位于通孔内且第一缺口设置于第一部分，第二部分凸出于端盖。阻挡件采用上述结构形式，在保证阻挡件能够与通孔的侧壁之间形成通道的要求的基础上还能够使得阻挡件的结构简单，易于成型，且便于在通孔内拆装。
根据本申请实施例的一个方面，第二部分上设置有第二缺口，第二 缺口与第一缺口连通。一方面，第二缺口的设置使得阻挡件在承装盒中(即未与各端盖的通孔配合之前)能够按照预定方向定位，便于机械手抓取并安装至通孔内。另一方面，第二缺口的设置可以利于流体进入通道内。再一方面，第二缺口的设置还能够使得第二部分的径向尺寸进一步小于第一部分的径向尺寸，利于阻挡件的装配。
根据本申请实施例的一个方面，形成第一缺口的表面为平面，或者，形成第一缺口的表面为弧面。当第一缺口的表面为平面时，可以沿着预定的方向切割形成，易于成型。当第一缺口的表面为弧形面时，在满足通道的尺寸要求的基础上，能够保证阻挡件与通孔壁面的接触面积，保证阻挡件与端盖之间的连接强度。
根据本申请实施例的一个方面，端盖还设置有凹部，凹部与通孔相对设置并与通孔连通，凹部用于容纳密封件。通过设置凹部，便于密封件的安装以及与端盖之间连接并形成连接位，利于对通孔的密封，且使得密封件无需凸出端盖设置，能够减小端盖组件的整体厚度。
另一个方面，根据本申请实施例提供一种电池单体，包括：壳体，具有内部空间以及与内部空间连通的开口；上述的端盖组件，端盖组件封闭开口，通道与内部空间连通。
根据本申请实施例提供的电池单体，包括上述各实施例提供的端盖组件，其通道的设置使得电池单体内部的流体能够通过通道流向连接位。当密封件与端盖之间的连接位发生泄漏时，电池单体内部的流体能够被检测，以反馈密封件与端盖之间是否发生泄漏，以在出厂前对于发生泄漏的电池单体采取补救措施，保证电池单体的密封性。
又一个方面，根据本申请实施例提供一种电池，包括上述的电池单体。
根据本申请实施例提供的电池，包括上述实施例提供的电池单体，其密封性能好，安全性高。
再一个方面，根据本申请实施例提供一种用电装置，包括上述的电池单体，电池单体用于提供电能。
根据本申请实施例提供的用电装置，包括上述实施例提供的电池单体，其密封性能好，安全性高。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
图1是本申请一实施例的一种车辆的结构示意图；
图2是本申请一实施例的一种电池的分解示意图；
图3是本申请一实施例的一种电池模块的结构示意图；
图4是本申请一实施例的一种电池单体的分解结构示意图；
图5是本申请一实施例的端盖组件的结构示意图；
图6是本申请一实施例的端盖组件的分解示意图；
图7是本申请一实施例的端盖组件的俯视图；
图8是图7中沿A-A方向的剖视图；
图9是图8中B处放大图；
图10是本申请一实施例的端盖的局部剖视图；
图11是本申请另一实施例的端盖组件的阻挡件与端盖配合的局部 剖视图；
图12是本申请又一实施例的端盖组件的阻挡件与端盖配合的局部剖视图；
图13是本申请一实施例的阻挡件的结构示意图；
图14是本申请一实施例的阻挡件的侧视图；
图15是本申请另一实施例的阻挡件的结构示意图；
图16是本申请另一实施例的阻挡件的侧视图；
图17是本申请另一实施例的阻挡件的俯视图；
图18是本申请又一实施例的阻挡件的俯视图。
其中：
1-车辆；1a-马达；1b-控制器；
10-电池；11-箱体；111-第一箱体；112-第二箱体；
20-电池模块；
30-电池单体；
31-壳体；32-电极组件；321-主体部；322-极耳；
40-端盖组件；
41-端盖；411-通孔；412-凹部；
42-密封件；421-避让槽；
43-阻挡件；431-第一部分；432-第二部分；433-第一缺口；434-第二缺口；
44-通道；
45-电极端子；
46-连接位；
X-轴向。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
在本申请的描述中，需要说明的是，除非另有说明，“多个”的含义是两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述，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申请的限制。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性。“垂直”并不是严格意义上的垂直，而是在误差允许范围之内。“平行”并不是严格意义上的平行，而是在误差允许范围之内。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本申请所描述的实施例可以与其它实施例相结合。
在本申请的描述中，还需要说明的是，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；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
申请人在注意到电池单体频繁出现密封性差，使得内部的电极组件被湿润空气入侵，极速衰减的问题之后，对电池单体的各个结构进行研究分析发现，端盖组件的端盖上通常需要设置通孔，以满足注液或排气等要求。对于通孔的密封通常会设置阻挡件以及密封件，阻挡件装入端盖组件的通孔内，使通孔成为密封状态，再将密封件置于通孔的一端并与端盖组件进行焊接实现通孔的双重密封。通过氦检工艺，检测位于密封件与端盖 之间焊接是否可靠。上述设置将出现一个问题，当位于通孔端部的密封件与端盖组件之间焊接失效时，由于位于通孔内的阻挡件与通孔之间依然可以形成密封效果，氦检将无法检测出焊接失效。此种电池单体，当通孔内的阻挡件在复杂的使用工况下，发生脱落，此时将失去阻挡件以及密封件的双重密封作用，电池单体内部的电极组件将被空气中湿润气体的入侵，性能极速衰减。
基于申请人发现的上述问题，申请人对电池单体的端盖组件的结构进行改进，以满足电池单体的密封要求。
为了更好地理解本申请，下面结合图1至图18对本申请实施例进行详细描述。
本申请实施例提供一种使用电池作为电源的用电装置。该用电装置可以但不仅限于为车辆、船舶或飞行器等。
参见图1所示，本申请的一个实施例提供一种车辆1。车辆1可以为燃油汽车、燃气汽车或新能源汽车。新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。在本申请一实施例中，车辆1可以包括马达1a、控制器1b以及电池10。控制器1b用来控制电池10为马达1a供电。马达1a通过传动机构与车轮连接，从而驱动车辆1行进。电池10可以作为车辆1的驱动电源，替代或部分地替代燃油或天然气为车辆1提供驱动动力。在一个示例中，在车辆1的底部或车头或车尾可以设置电池10。电池10可以用于为车辆1供电。在一个示例中，电池10可以作为车辆1的操作电源，用于车辆1的电路系统。在一个示例中，电池10可以用于车辆1的启动、导航和运行时的工作用电需求。
参见图2所示，电池10可以包括两个以上的电池模块20。在一些实施例中，电池10还包括箱体11。电池模块20设置于箱体11内。两个以上的电池模块20排列布置于箱体11内。箱体11的类型不受限制。箱体11可为框状箱体、盘状箱体或盒状箱体等。在一些实施例中，箱体11包括用于容纳电池模块20的第一箱体111和与第一箱体111盖合的第二箱体112。第二箱体112和第一箱体111盖合后形成容纳电池模块20的容 纳腔。在一些实施例中，电池10也可以包括一个电池模块20。在其他实施例中，电池10包括箱体11和直接设置于箱体11内的多个电池单体。
参见图3所示，电池模块20包括两个以上的电池单体30。电池模块20的设置方式有多种。在一个实施例中，电池模块20包括容纳部(图中未示出)和位于容纳部内的两个以上的电池单体30。两个以上的电池单体30在容纳部内并排设置。容纳部的设置方式有多种，例如容纳部包括外壳和盖设于外壳处的盖板。或者，容纳部包括相继围合连接的侧板和端板。或者，容纳部包括相对设置的两端板及环绕于端板和电池单体30外的箍带。
参见图4所示，本申请实施例的电池单体30包括壳体31以及设置于壳体31内的电极组件32。本申请实施例的壳体31为方形、圆壳或其他形状。壳体31具有容纳电极组件32和电解液的内部空间以及与内部空间相连通的开口。壳体31可以由例如铝、铝合金、钢材或塑料等材料制造。
本申请实施例的电极组件32可通过将第一极片、第二极片以及位于第一极片和第二极片之间的隔膜一同堆叠或卷绕形成，其中，隔膜是介于第一极片和第二极片之间的绝缘体。在本实施例中，示例性地以第一极片为正极片，第二极片为负极片进行说明。正极片和负极片均包括涂覆区和未涂覆区，正极片活性物质被涂覆在正极片的涂覆区上，而负极片活性物质被涂覆在负极片的涂覆区上。在涂覆区上，活性物质被涂覆在由薄板金属箔形成的集流体上，在未涂覆区上没有涂覆活性物质。电极组件32还包括两个极耳322，即正极耳和负极耳。正极片的涂覆区和负极片的涂覆区形成主体部321。正极片的未涂覆区层叠形成正极耳，而负极片的未涂覆区层叠形成负极耳。在一些实施例中，主体部321具有沿高度方向的相对设置的两个端面，正极耳和负极耳可以分别从主体部321的一个端面上延伸出。
继续参见图4至图10所示，本申请实施例的电池单体30还包括与壳体31密封连接的端盖组件40。端盖组件40包括端盖41、电极端子 45、密封件42以及阻挡件43。电极端子45可以与电极组件32的极耳322电连接，电极端子45设置于端盖41上。电极端子45的外形可以是圆形，也可以是方形，这里不做限定。
端盖41设置有通孔411，密封件42用于密封通孔411，且密封件42连接于端盖41并形成连接位46。阻挡件43设置于通孔411且至少部分阻挡件43与通孔411的侧壁之间形成有通道44，通道44用于将电池单体30内的流体引导至连接位46。
本申请实施例提供的端盖组件40，在用于电池单体30时，端盖组件40可以封闭壳体31的开口，具体可以通过端盖41与壳体31密封连接。端盖41上的通孔411的设置能够用于注入电解液或排出电池单体30内的气体等，密封件42用于密封通孔411并能够与端盖41之间形成连接位46。而阻挡件43位于通孔411内并能够与通孔411的侧壁之间形成有通道44，通道44与壳体31的内部空间连通。阻挡件43能够对电池单体30内部流体起到局部的阻挡作用。通道44的设置使得当密封件42与端盖41之间的连接位46发生泄露时，电池单体30内部的流体能够通过通道44流向连接位46并被检测，以反馈密封件42与端盖41之间是否发生泄漏，能够更好的保证端盖组件40的密封性，满足电池单体30的密封要求。
例如，可以在电池单体30的内部注入有一定量的氦气，当密封件42与端盖41之间的连接位46因焊接不牢等原因造成泄露时，氦气将通过阻挡件43与通孔411的侧壁之间形成的通道44流至连接位46。连接位46泄露的位置即可被检测设备检测到，重新补焊或者采用其他补救措施，保证密封件42与端盖41之间的连接位46的密封性能，进而保证电池单体30的安全性以及使用寿命。
本申请实施例提供的端盖组件40，其通道44是形成在阻挡件43与通孔411的侧壁之间，使得通道44易于加工形成，并能够使得阻挡件43的强度损失小，阻挡件43不易变形。有效的避免因阻挡件43变形而导致通道44堵塞现象的发生，进而保证对密封件42与端盖41之间连接位46 的密封性能检测的准确性。
参见图11所示，在一些实施例中，沿通孔411的轴向X且向通孔411靠近密封件42的一侧，通道44的横截面积递减。通过上述设置，能够尽可能增大通道44的下端开口，利于流体流动至连接位46，同时能够保证阻挡件43与通孔411配合的稳定性。
继续参见图11所示，示例性地，沿通孔411的轴向X且向通孔411靠近密封件42的一侧，通道44的横截面积可以逐渐减小。
参见图12所示，在有些实施例中，也可以使得沿通孔411的轴向X且向通孔411靠近密封件42的一侧，通道44的横截面积可以逐段减小，同样能够满足通道44的横截面积的递减要求。
继续参见图4至图12所示，在一些实施例中，上述各实施例提供的端盖组件40，其端盖41上还可以设置有凹部412，凹部412与通孔411相对设置并与通孔411连通。在一些实施例中，凹部412可以在通孔411的轴向X上与通孔411相对设置，凹部412用于容纳密封件42。通过设置凹部412，便于密封件42的安装以及与端盖41之间连接并形成连接位46，利于对通孔411的密封。且使得密封件42无需凸出端盖41设置，能够减小端盖组件40的整体厚度。
在一些实施例中，密封件42靠近阻挡件43的一侧可以设置有避让槽421，通过设置避让槽421，能够使得密封件42在装配时能够避免与阻挡件43之间发生干涉，利于密封件42的装配。
参见图13至图14所示，在一些实施例中，在一些实施例中，本申请上述各实施例提供的端盖组件40，其阻挡件43面向通孔411的侧壁的表面可以设置有第一缺口433，第一缺口433与侧壁之间形成通道44。通过在阻挡件43上设置第一缺口433，使得阻挡件43不能与通孔411的侧壁完全贴合，利于通道44的形成。
可以理解的是，通过在阻挡件43的侧壁上形成第一缺口433，以使得其与通孔411的侧壁之间形成通道44只是一种实施方式，但不限于上述方式，在有些实施例中，也可以使得通孔411的侧壁上设置第一缺口 433，同样能够使得阻挡件43不能与通孔411的侧壁完全贴合，也可以满足在二者之间形成通道44的需求。
在一些实施例中，上述各实施例提供的端盖组件40，通孔411在自身轴向X具有两个相对的端口，第一缺口433始终贯穿两个端口。通过上述设置，能够保持通道44的畅通性，保证流体能够通过通道44流向密封件42与端盖41之间的连接位46。
继续参见图13至图14所示，在一些实施例中，阻挡件43可以包括相继设置的第一部分431以及第二部分432，第一部分431位于通孔411内且第一缺口433设置于第一部分431，第二部分432凸出于端盖41设置。阻挡件43采用上述结构形式，在保证阻挡件43能够与通孔411的侧壁之间形成通道44的要求的基础上还能够使得阻挡件43的结构简单，易于成型，且便于在通孔411内拆装。
示例性地，阻挡件43的第一部分431与第二部分432可以在通孔411的轴向X相继设置。
在一些实施例中，第一部分431以及第二部分432均可以为柱状体，第一部分431的形状与通孔411的截面形状可以至少部分相匹配。
一些示例中，通孔411可以为圆孔，第一部分431可以为与通孔411形状相配合的圆柱体，第一缺口433设置在第一部分431面向通孔411的侧壁的表面，阻挡件43的其余部分表面与通孔411的侧壁之间可以紧密贴合，以保证阻挡件43与通孔411之间连接的稳定性。
在一些实施例中，第二部分432的形状同样可以为圆柱体。第二部分432与第一部分431之间可以同轴设置。
在一些实施例中，可以使得第二部分432的径向尺寸小于第一部分431的径向尺寸，能够更利于流体由通道44流向连接位46。
可以理解的是，限定第一部分431以及第二部分432均为圆柱体只是一种实施方式，但不限于上述方式，在有些实施例中，也可以使得第一部分431以及第二部分432均为四棱柱、五棱柱等其他多边形柱体，例 如，正多边形柱体，只要能够满足通道44的形成要求均可。
继续参见图13至图14所示，在一些实施例中，当阻挡件43包括第二部分432时，第二部分432上可以设置有第二缺口434，第二缺口434与第一缺口433连通。一方面，第二缺口434的设置使得阻挡件43在承装盒中(即未与各端盖41的通孔411配合之前)能够按照预定方向定位，便于机械手抓取并安装至通孔411内。另一方面，第二缺口434的设置可以利于流体进入通道44内。再一方面，第二缺口434的设置还能够使得第二部分432的径向尺寸进一步小于第一部分431的径向尺寸，利于阻挡件43的装配。在一些实施例中，第二部分432远离第一部分431的一端呈锥体结构，以便于阻挡件43插接于通孔411内。
继续参见图13至图14所示，在一些实施例中，上述各实施例提供的端盖组件40，其阻挡件43形成第一缺口433的表面可以为平面，可以沿通孔411的轴向X直接切取形成。
当然，也可以为沿着与通孔411的轴向X相交的方向切取形成，以更好的满足沿通孔411的轴向X且向通孔411靠近密封件42的一侧，通道44的横截面积递减的需求。
在一些实施例中，阻挡件43形成第二缺口434的表面也可以为平面，第二缺口434与第一缺口433连通。
参见图15至图17所示，在有些实施例中，也可以使得阻挡件43形成第一缺口433的表面为弧面，相应的形成第二缺口434的表面也可以为弧形面或者平面。只要能够满足通道44的形成，以将流体能够引导至连接位46的要求均可。
上述各实施例提供的端盖组件40，其阻挡件43所包括的第一缺口433的数量可以为一个，此时，第二缺口434的数量也可以为一个并与第一缺口433相对设置并相互连通。
当然，在有些实施例中，参见图18所示，阻挡件43所包括的第一缺口433的数量也可以为两个及以上，两个及以上第一缺口433在通孔411的周向间隔设置。
在一些实施例中，当第一缺口433的数量大于等于三个时，每相邻两个第一缺口433之间的夹角相同，能够将流体均匀地的引导至密封件42与端盖41形成的连接位46的各处。
在一些实施例中，当第一缺口433的数量为两个以上时，第二缺口434的数量可以与第一缺口433的数量相同并一一相对设置，相对设置的第一缺口433与第二缺口434相互连通。
本申请实施例提供的端盖组件40，在用于电池单体30时，可以通过端盖41与电池单体30的壳体31密封连接，在电池单体30的化成阶段后，用负压设备进行抽负压。负压完成后，在电池单体30内部注入一定量的氦气，将阻挡件43装入通孔411内，再将密封件42与端盖41连接，例如可以采用激光焊接，由于阻挡件43与通孔411的侧壁之间形成的通道44，且通道44和密封件42与端盖41之间形成的连接位46连通，可以将电池单体30内部的氦气引导至连接位46的各处，当连接位46出现焊接不牢等原因导致的泄露时，通过氦检工艺，能够被检测出，以在出厂前对于发生泄漏的端盖组件40采取补救措施，保证出场的电池单体30的密封性，进而提高其安全等级以及使用寿命。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (20)

  1. 一种端盖组件，用于电池单体，其中，所述端盖组件包括：
    端盖，设置有通孔；
    密封件，用于密封所述通孔，且所述密封件连接于所述端盖并形成连接位；
    阻挡件，设置于所述通孔且至少部分所述阻挡件与所述通孔的侧壁之间形成有通道，所述通道用于将所述电池单体内的流体引导至所述连接位。
  2. 根据权利要求1所述的端盖组件，其中，所述阻挡件面向所述侧壁的表面设置有第一缺口，所述第一缺口与所述侧壁之间形成所述通道。
  3. 根据权利要求2所述的端盖组件，其中，沿所述通孔的轴向且向所述通孔靠近所述密封件的一侧，所述通道的横截面积递减。
  4. 根据权利要求3所述的端盖组件，其中，沿所述通孔的轴向且向所述通孔靠近所述密封件的一侧，所述通道的横截面积逐渐减小。
  5. 根据权利要求3所述的端盖组件，其中，沿所述通孔的轴向且向所述通孔靠近所述密封件的一侧，所述通道的横截面积逐段减小。
  6. 根据权利要求2至5任意一项所述的端盖组件，其中，所述通孔在自身轴向具有两个相对的端口，所述第一缺口始终贯穿两个所述端口。
  7. 根据权利要求2至6任意一项所述的端盖组件，其中，所述阻挡件包括相继设置的第一部分以及第二部分，所述第一部分位于所述通孔内且所述第一缺口设置于所述第一部分，所述第二部分凸出于所述端盖。
  8. 根据权利要求7所述的端盖组件，其中，所述第二部分设置有第二缺口，所述第二缺口与所述第一缺口连通。
  9. 根据权利要求8所述的端盖组件，其中，所述第二缺口的数量与所 述第一缺口的数量相同并一一相对设置。
  10. 根据权利要求7至9任意一项所述的端盖组件，其中，所述通孔为圆孔，所述第一部分为与所述通孔形状相配合的圆柱体，所述第一缺口设置在所述第一部分面向所述通孔的侧壁的表面，所述阻挡件的其余部分表面与所述通孔的侧壁之间紧密贴合。
  11. 根据权利要求10所述的端盖组件，其中，所述第二部分为圆柱体，所述第二部分与所述第一部分同轴设置。
  12. 根据权利要求11所述的端盖组件，其中，所述第二部分的径向尺寸小于所述第一部分的径向尺寸。
  13. 根据权利要求2至12任意一项所述的端盖组件，其中，所述第一缺口的数量大于或者等于两个及以上，两个及以上所述第一缺口在所述通孔的周向上间隔设置。
  14. 根据权利要求13所述的端盖组件，其中，所述第一缺口的数量大于或者等于三个，每相邻两个所述第一缺口之间的夹角相同。
  15. 根据权利要求2至14任意一项所述的端盖组件，其中，形成所述第一缺口的表面为平面。
  16. 根据权利要求2至14任意一项所述的端盖组件，其中，形成所述第一缺口的表面为弧面。
  17. 根据权利要求1至16任意一项所述的端盖组件，其中，所述端盖还设置有凹部，所述凹部与所述通孔相对设置并与所述通孔连通，所述凹部用于容纳所述密封件。
  18. 一种电池单体，其中，包括：
    壳体，具有内部空间以及与所述内部空间连通的开口；
    如权利要求1至17任意一项所述的端盖组件，所述端盖组件封闭所述开口，所述通道与所述内部空间连通。
  19. 一种电池，其中，包括如权利要求18所述的电池单体。
  20. 一种用电装置，其中，包括如权利要求18所述的电池单体，所述电池单体用于提供电能。
PCT/CN2021/111618 2020-10-13 2021-08-09 端盖组件、电池单体、电池以及用电装置 WO2022078034A1 (zh)

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