CN217589184U

CN217589184U - End cover assembly, battery monomer, battery and power consumption device

Info

Publication number: CN217589184U
Application number: CN202221880490.5U
Authority: CN
Inventors: 陈新祥; 郑于炼; 黄守君; 陈龙; 林蹬华; 王鹏
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2022-10-14
Anticipated expiration: 2032-07-21

Abstract

The application discloses end cover subassembly, battery monomer, battery and power consumption device, this end cover subassembly includes the end cover, utmost point post and sealing washer, be equipped with utmost point post hole on the end cover, at least partial utmost point post is installed in utmost point post hole, the sealing washer suit is on utmost point post, and the sealing washer is pressed from both sides and establishes sealed between utmost point post and utmost point post hole, be equipped with on the sealing washer be used for with the annular seal face of the internal face looks butt in utmost point post hole, in the axial direction in utmost point post hole, the size of annular seal face is not less than 1/2 of the size in utmost point post hole. According to the end cover assembly of this application, the sealing washer suit is on utmost point post to the sealing washer is pressed from both sides and is established between utmost point post and utmost point post hole, utilizes the sealing washer radially to be extruded and has realized the sealed between utmost point post and utmost point post hole, and through in the axial direction in utmost point post hole, sets the size of ring packing face to 1/2 of the size that is not less than utmost point post hole, has guaranteed the sealing washer to utmost point post and the sealed effect in utmost point post hole.

Description

End cover assembly, single battery, battery and power utilization device

Technical Field

The application relates to the technical field of battery production, in particular to an end cover assembly, a battery monomer, a battery and an electric device.

Background

With the development of new energy, new energy is adopted as power in more and more fields. Because of the advantages of high energy density, cyclic charging, safety, environmental protection and the like, the power battery is widely applied to the fields of new energy automobiles, consumer electronics, energy storage systems and the like.

The electrode assembly of the power battery has high requirement on air tightness, and if the air tightness is poor, water vapor is easy to enter the electrode assembly, so that the power battery is adversely affected. Wherein, the sealing effect between end cover and the utmost point post directly influences holistic sealing performance.

During machine assembly or parts assembly, a closed size group is formed by interconnected sizes, called a size chain. In the prior art, the post and the end cover are sealed in the vertical direction by using the sealing ring, but a size chain (or called size limitation) formed among the sealing ring, the post hole and the post in the vertical direction is more. However, the dimensional fluctuation of the compression amount of the seal ring is large due to the manufacturing tolerance of the seal ring, the pole post hole, the pole post and the like, and the sealing effect of the seal ring cannot be ensured.

SUMMERY OF THE UTILITY MODEL

In view of above-mentioned problem, the application provides an end cover subassembly, battery monomer, battery and power consumption device, has solved the problem that sealed effect can't be guaranteed between utmost point post and the end cover.

A first aspect of the present application provides an end cap assembly, comprising:

the end cover is provided with a pole column hole;

the pole column is at least partially arranged in the pole column hole;

the sealing ring is sleeved on the pole column and clamped and sealed between the pole column and the inner wall surface of the pole column hole, an annular sealing surface used for being abutted against the pole column hole is arranged on the sealing ring, and the size of the annular sealing surface is not smaller than 1/2 of the size of the pole column hole in the axial direction of the pole column hole.

According to the end cover subassembly of this application, the sealing washer suit is on utmost point post to the sealing washer is pressed from both sides and is established between utmost point post and utmost point post hole, utilizes the sealing washer radially to be realized sealed between utmost point post and the utmost point post hole by the extrusion, has solved prior art, and the size is injectd more in the vertical direction, and the size of the volume of compression that leads to the sealing washer because reasons such as manufacturing tolerance is undulant great, can't guarantee the problem of the sealed effect of sealing washer. And the size of the annular sealing surface is set to be not less than 1/2 of the size of the pole column hole in the axial direction of the pole column hole, so that the sealing effect of the sealing ring on the pole column and the pole column hole is ensured.

In some embodiments of the present application, the annular sealing surface is no less than 1mm in an axial direction of the pole bore. In the axial direction of utmost point post hole, through further setting up the size of annular seal face for be no less than 1mm for in the direction of height in utmost point post hole, have sufficient sealed region between sealing washer and the utmost point post hole, thereby guaranteed sealed effect.

In some embodiments of the present application, the size of the annular seal face in the axial direction of the pole bore is any value of [1.2mm,2.5mm ]. In the axial direction of the pole column hole, the size of the annular sealing surface is further set within the range of [1.2mm,2.5mm ], so that the area of a sealing area is further ensured between the sealing ring and the pole column hole in the axial direction of the pole column hole, and the sealing effect is ensured.

In some embodiments of the present application, the seal ring has a dimension L in a radial direction of the pole bore, where L ∈ [0.5mm,3mm ]. In the radial direction in utmost point post hole, set for the size of sealing washer for the sealing washer has certain intensity, is convenient for control the decrement of sealing washer, with the stability of promotion decrement.

In some embodiments of the present application, the sealing ring is a rubber member, and the rubber member is a silicone member or a fluororubber member;

or, the sealing ring is a plastic part, and the plastic part is a soluble polytetrafluoroethylene part or a polytetrafluoroethylene part.

Through setting the sealing washer to the rubber spare to set the rubber spare to silica gel spare or fluorine rubber spare, prevented to lead to the condition of sealed inefficacy because of sealing washer self can see through steam.

Set the sealing washer to the plastic part to soluble polytetrafluoroethylene or polytetrafluoroethylene spare have prevented equally because of sealing washer self can see through steam and lead to the condition of sealed inefficacy with the plastic part setting.

In some embodiments of this application, the size of sealing washer is greater than the axial direction in utmost point post hole, utmost point post is equipped with the flange structure, the flange structure is located the outside in utmost point post hole and to the radial outside in utmost point post hole extends, the sealing washer is located be equipped with the shirt rim on the body in utmost point post hole outside, the shirt rim to the radial outside extension in utmost point post hole, the end cover includes the top cap, utmost point post hole is seted up on the top cap, the opposite both sides of shirt rim respectively with the lower surface of top cap with the upper surface of flange structure offsets and leans on. The flange structure of utmost point post and the shirt rim of sealing washer all are located the outside in utmost point post hole, utilize flange structure and end cover to carry out the centre gripping with the shirt rim, and utmost point post is outside utmost point post hole and the sealed structure that increases between the end cover, has further improved sealed effect.

In some embodiments of the present application, the annular sealing surface and/or the wall surface of the post hole is provided with at least one protruding structure extending in a radial direction of the post hole. Through setting up protruding structure for the sealing washer when sealing up between antipole post and utmost point post hole, increased the decrement of sealing washer, make sealed effect obtain further promotion.

In some embodiments of the present application, the inner wall surface of the post hole is provided with the projection structure along a circumferential direction thereof. Set up protruding structure on the internal face in utmost point post hole to make the equal accessible protruding structure increase the compression volume in the circumference of sealing washer, make sealed effect obtain further improvement.

In some embodiments of the present application, the dimension of the protruding structure in the radial direction of the pole post hole is m, where m ∈ [0.05mm,0.2mm ]. In the axial direction in utmost point post hole, to the size setting of protruding structure, can further realize the control to the sealing washer compression volume for sealed effect between utmost point post and the utmost point post hole has obtained the assurance.

In some embodiments of the present application, the dimension of the projection structure in the axial direction of the pole bore is n, where n ∈ [0.1mm,0.5mm ]. In the axial direction of the pole column hole, the size of the protruding structure is set, the influence of the protruding structure on the sealing ring is increased, the compression amount of the sealing ring in the sealing process is further increased, and the sealing effect is improved.

A second aspect of the present application provides a battery cell including an end cap assembly as described above.

According to the battery monomer of this application, wherein, the sealing washer suit of end cover subassembly is on utmost point post to the sealing washer is pressed from both sides and is established between utmost point post and utmost point post hole, utilizes the sealing washer radially to be realized sealed between utmost point post and the utmost point post hole by the extrusion, has solved prior art, and the size is injectd more in the vertical direction, and is great owing to reasons such as manufacturing tolerance lead to the size fluctuation of the compression capacity of sealing washer, can't guarantee the problem of the sealed effect of sealing washer. And the size of the annular sealing surface is set to be not less than 1/2 of the size of the pole column hole in the axial direction of the pole column hole, so that the sealing effect of the sealing ring on the pole column and the pole column hole is ensured.

A third aspect of the present application provides a battery including: a battery cell as described above.

According to the battery of this application, the battery has the battery monomer, and wherein, the sealing washer suit of the free end cover subassembly of battery is on utmost point post to the sealing washer is pressed from both sides and is established between utmost point post and utmost point post hole, utilizes the sealing washer radially to be extruded and has realized the sealed between utmost point post and the utmost point post hole, has solved prior art, and the size is injectd more in the vertical direction, and because reasons such as manufacturing tolerance lead to the size of the compression capacity of sealing washer undulant great, can't guarantee the problem of the sealed effect of sealing washer. And the size of the annular sealing surface is set to be not less than 1/2 of the size of the pole column hole in the axial direction of the pole column hole, so that the sealing effect of the sealing ring on the pole column and the pole column hole is ensured.

A fourth aspect of the present application is an electric device comprising a battery as described above for providing electric energy.

According to the power consumption device of this application, power consumption device's battery has the battery monomer, wherein, the sealing washer suit of the free end cover subassembly of battery is on utmost point post to the sealing washer is pressed from both sides and is established between utmost point post and utmost point post hole, utilizes the sealing washer radially to be extruded and has realized the sealed between utmost point post and the utmost point post hole, has solved prior art, and the size is injectd more in the vertical direction, and because reasons such as manufacturing tolerance lead to the size of the compression volume of sealing washer undulant great, can't guarantee the problem of the sealed effect of sealing washer. And the size of the annular sealing surface is set to be not less than 1/2 of the size of the pole column hole in the axial direction of the pole column hole, so that the sealing effect of the sealing ring on the pole column and the pole column hole is ensured.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Fig. 1 schematically shows a structural view of a vehicle according to an embodiment of the present application;

fig. 2 schematically shows a structural view of a battery pack according to an embodiment of the present application;

fig. 3 schematically shows a structural view of a battery module according to an embodiment of the present application;

fig. 4 schematically shows a structural view of a battery cell according to an embodiment of the present application;

FIG. 5 is a schematic structural view of the end cap assembly shown in FIG. 4;

FIG. 6 is an exploded schematic view of the end cap assembly shown in FIG. 5;

FIG. 7 isbase:Sub>A cross-sectional view of portion A-A of the end cap assembly shown in FIG. 5;

FIG. 8 is an enlarged schematic view of a portion B of the structure shown in FIG. 7 (first embodiment);

FIG. 9 is a schematic structural view of the seal ring shown in FIG. 6;

fig. 10 is a schematic structural view of the pole shown in fig. 6;

FIG. 11 is an enlarged view of the portion B of the structure shown in FIG. 7 (second embodiment);

fig. 12 is an enlarged structural view of a portion C of the structure shown in fig. 11.

The reference numbers are as follows:

1000 is a vehicle;

100 is a battery, 200 is a controller, and 300 is a motor;

110 is a battery module, and 120 is a box body;

121 is a first portion and 122 is a second portion;

10 is a battery monomer;

1 is a shell;

2 is an electrode assembly;

3 is an end cover component;

31 is an end cover;

311 is a top cover, 3111 is a pole hole, 3112 is a convex structure, and 312 is a bottom cover;

32 is a pole column;

321 is a flange structure;

33 is a seal ring;

331 is a skirt.

a is the axial direction of the pole column hole;

b is the radial direction of the pole column hole;

l is the size of the sealing ring in the radial direction of the pole column hole;

m is the size of the convex structure in the radial direction of the pole column hole;

n is the dimension of the protruding structure in the axial direction of the pole post hole.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present application more clearly, and therefore are only used as examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof in the description and claims of this application and the description of the figures above, are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing the association object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

At present, the application of the power battery is more and more extensive from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanding.

The applicant has noticed that in the end cap assembly of the conventional battery cell, the terminal post and the end cap are sealed in the vertical direction by the sealing ring, but a size chain (or referred to as size limitation) formed between the sealing ring and the terminal post hole and the terminal post is more in the vertical direction. However, the size of the compression amount of the seal ring fluctuates greatly due to manufacturing tolerances of the seal ring, the post hole, the post, and the like, and the sealing effect of the seal ring cannot be ensured, so that how to solve the problem that the sealing effect of the seal ring cannot be ensured becomes a technical problem that needs to be solved by the technical staff in the field.

In order to solve the problem that the sealing effect of the sealing ring cannot be guaranteed, the applicant researches and discovers that the outer peripheral surface of the sealing ring is abutted to an electrode post hole in an end cover, and meanwhile, the inner peripheral surface of the sealing ring is abutted to the electrode post, so that the sealing ring is clamped between the electrode post and the electrode post hole, the sealing ring is radially sealed between the electrode post and the electrode post hole, and the problems that in the prior art, the size in the vertical direction is limited to a large extent, the size of the compression amount of the sealing ring is large in size fluctuation due to manufacturing tolerance and the like, and the sealing effect of the sealing ring cannot be guaranteed are solved. And the height of the annular sealing surface of the sealing ring is set to be more than or equal to 1/2 of the height of the pole column hole, so that the sealing effect of the sealing ring on the pole column and the pole column hole is ensured.

The battery cell related to the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but not limited to. A power supply system including the electric device composed of the battery cell, the battery, and the like according to the present application can be used.

The electric device using the battery as the power source in the embodiment of the present application may be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft, and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to be applied to the above-described battery and electric equipment, but may be applied to all batteries including a box and electric equipment using the battery.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present disclosure. The vehicle 1000 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or a range-extended automobile, etc. The battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may serve as an operation power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to supply power to the motor 300, for example, for starting, navigation, and operational power requirements while the vehicle 1000 is traveling.

In some embodiments of the present application, the battery 100 may not only serve as an operating power source of the vehicle 1000, but also serve as a driving power source of the vehicle 1000, instead of or in part of fuel or natural gas to provide driving power for the vehicle 1000.

In order to meet different power requirements, the battery 100 may include a plurality of battery cells, which are the smallest units constituting a battery module or a battery pack. A plurality of battery cells may be connected in series and/or in parallel via electrode terminals to be applied to various applications. The battery 100 referred to in the present application includes a battery module or a battery pack. The plurality of battery cells can be connected in series or in parallel or in series-parallel, and the series-parallel refers to the mixture of series connection and parallel connection. The battery 100 may also be referred to as a battery pack. A plurality of battery monomers can directly constitute the battery package in the embodiment of this application, also can constitute battery module earlier, and battery module constitutes the battery package again.

Fig. 2 shows a schematic structural diagram of the battery 100 according to an embodiment of the present application. In fig. 2, the battery 100 may include a plurality of battery modules 110 and a case 120, and the plurality of battery modules 110 are received inside the case 120. The case 120 is used to accommodate the battery cells or the battery module 110 to prevent liquid or other foreign materials from affecting the charging or discharging of the battery cells. The box body 120 may be a single cuboid, a cylinder, a sphere, or other simple three-dimensional structure, or may be a complex three-dimensional structure formed by combining cuboid, cylinder, or sphere, which is not limited in the embodiment of the present application. The material of the box body 120 may be an alloy material such as an aluminum alloy and an iron alloy, a polymer material such as polycarbonate and polyisocyanurate foam, or a composite material of glass fiber and epoxy resin, which is not limited in this embodiment.

In some embodiments, as shown in fig. 2, the case 120 may include a first portion 121 and a second portion 122, the first portion 121 and the second portion 122 cover each other, and the first portion 121 and the second portion 122 together define a space for accommodating the battery cells. The second part 122 may be a hollow structure with an open end, the first part 121 may be a plate-shaped structure, and the first part 121 covers the open side of the second part 122, so that the first part 121 and the second part 122 together define a space for accommodating a battery cell; the first portion 121 and the second portion 122 may be both hollow structures with one side open, and the open side of the first portion 121 may cover the open side of the second portion 122.

Fig. 3 is a schematic structural view illustrating a battery module 110 according to an embodiment of the present disclosure. In fig. 3, the battery module 110 may include a plurality of battery cells 10, the plurality of battery cells 10 may be connected in series or in parallel or in series-parallel to form the battery module 110, and the plurality of battery modules 110 are connected in series or in parallel or in series-parallel to form the battery. In this application, the single battery 10 may include a lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in this application. The battery cell 10 may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells 10 are generally divided into three types in an encapsulated manner: the cylindrical battery monomer, the square battery monomer and the soft package battery monomer are not limited in the embodiment of the application.

Fig. 4 shows a schematic structural diagram of the battery cell 10 according to an embodiment of the present application. Battery cell 10 includes a case 1, an end cap assembly 3, and an electrode assembly 2.

The end cap assembly 3 includes an end cap 31, and the end cap 31 refers to a component covering the opening of the case 1 to isolate the internal environment of the battery cell 10 from the external environment. Without limitation, the shape of the end cap 31 may be adapted to the shape of the housing 1 to fit the housing 1. Alternatively, the end cap 31 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the end cap 31 is not easily deformed when being impacted, and the single battery 10 may have a higher structural strength and improved safety. The material of the end cap 31 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment. In some embodiments, insulation may also be provided on the inside of the end cap 31, which may be used to isolate the electrical connection components within the housing 1 from the end cap 31 to reduce the risk of short circuits. Illustratively, the insulator may be plastic, rubber, or the like.

The end cap assembly 3 includes a pressure relief mechanism provided on the end cap 31 for relieving the internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold value.

The case 1 is an assembly for mating with the end cap 31 to form an internal environment of the battery cell 10, wherein the formed internal environment may be used to house the electrode assembly 2, electrolyte, and other components. The housing 1 and the end cap 31 may be separate components, and an opening may be provided on the housing 1, and the end cap 31 covers the opening to form the internal environment of the battery cell 10. Without limitation, the end cap 31 and the housing 1 may be integrated, and specifically, the end cap 31 and the housing 1 may form a common connecting surface before other components are inserted into the housing, and when it is necessary to seal the inside of the housing 1, the end cap 31 covers the housing 1. The housing 1 may be of various shapes and various sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism shape, and the like. Specifically, the shape of the housing 1 may be determined according to the specific shape and size of the electric core assembly. The material of the housing 11 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment.

The electrode assembly 2 is a component of the battery cell 10 where electrochemical reactions occur. One or more electrode assemblies 2 may be contained within the case 1. The electrode assembly 2 is mainly formed by winding pole pieces (a positive pole piece and a negative pole piece) (one end of one pole piece is fixed, and the other end is wound in one direction with one end as a center) or stacking (setting a stacking width, and folding back and forth based on the stacking width to realize stacking of the pole pieces) and is usually provided with a separator between the positive pole piece and the negative pole piece. The parts of the pole pieces (the positive pole piece and the negative pole piece) with the active materials form a main body part of the pole assembly, and the parts of the positive pole piece and the negative pole piece without the active materials form pole lugs respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or at both ends of the main body portion, respectively.

In some embodiments of the present application, as shown in fig. 4 to 12, the present application proposes an end cover assembly 3, the end cover assembly 3 includes an end cover 31, a post 32, and a sealing ring 33, the end cover 31 is provided with a post hole 3111, at least a part of the post 32 is mounted in the post hole 3111, the sealing ring 33 is sleeved on the post 32, and the sealing ring 33 is clamped and sealed between the post 32 and an inner wall surface of the post hole 3111, the sealing ring 33 is provided with an annular sealing surface for abutting against the post hole 3111, and a size of the annular sealing surface is not less than 1/2 of a size of the post hole 3111 in an axial direction of the post hole 3111.

As shown in fig. 5 to 8 and 10, the pole 32 is a component for inputting or outputting electric energy of the battery cell 10, and the pole 32 is disposed on the end cap 31 and is used for electrically connecting with the electrode assembly 2, so as to be used as a component for outputting or inputting electric energy of the battery cell 10. During the charging and discharging process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab is connected with the pole 32 to form a current loop. In addition, the post 32 is a conductive material, including but not limited to a copper material, an aluminum material, or other alloy materials.

As shown in fig. 8 or fig. 11, the post hole 3111 is a through hole provided in the end cover 31, after the end cover 31 covers the opening of the casing 1, the inside of the casing 1 and the outside can only be connected to the outside through the post hole 3111, at least a part of the body of the post 32 is installed in the post hole 3111, and the post 32 and the inner wall surface of the post hole 3111 are arranged at intervals, the space between the post 32 and the post hole 3111 is filled with the sealing ring 33, the sealing ring 33 is utilized to realize the sealing between the post 32 and the post hole 3111, and simultaneously, the post 32 and the end cover 31 are insulated, so as to prevent the occurrence of short circuit.

As shown in fig. 5, 6, 7, 8, 9, 11, or 12, the seal ring 33 is a ring-shaped member, the seal ring 33 is fitted around the post 32, an inner ring of the seal ring 33 is in contact with the post 32, an outer ring of the seal ring 33 is in contact with the post hole 3111, after the seal ring 33 is completely fitted, the seal ring 33 is disposed between the post 32 and the post hole 3111, the seal ring 33 is compressed, and the seal between the post 32 and the post hole 3111 is achieved by deformation of the seal ring 33. The seal ring 33 is an elastic member, and the seal ring 33 is brought into contact with a position to be sealed by a repulsive force generated by elastic deformation of the seal ring 33, which is an elastic member, so that the seal ring 33 seals the position to be sealed.

As shown in fig. 8 or 11, the sealing ring 33 is interposed and sealed between the pole post 32 and the pole post hole 3111 means that the sealing ring 33 is fitted around the pole post 32, the inner ring of the sealing ring 33 is in contact with the pole post 32 (at least a part of the body of the inner ring is in contact with the pole post 32, and the contact position surrounds a circumference of the pole post 32), the outer circumferential surface of the sealing ring 33 is in contact with the pole post hole 3111 (at least a part of the body of the outer ring is in contact with the pole post hole 3111, and the contact position surrounds a circumference of the pole post hole 3111), so that the sealing ring 33 is elastically deformed in the radial direction thereof, and the sealing ring 33 is in contact with the pole post 32 and the pole post hole 3111 by the repulsive force of the elastic deformation, thereby sealing the region between the pole post hole 3111 and the pole post 32.

The annular sealing surface is an area located on the seal ring 33, and the annular sealing surface is disposed around a circumference of the seal ring 33, and abuts against an inner wall surface of the post hole 3111.

Specifically, the sealing ring 33 is sleeved on the pole post 32, the sealing ring 33 is clamped between the pole post 32 and the pole post hole 3111, the sealing ring 33 is radially extruded to realize the sealing between the pole post 32 and the pole post hole 3111, and the problems that in the prior art, the size in the vertical direction is limited more, the size fluctuation of the compression amount of the sealing ring is large due to manufacturing tolerance and the like, and the sealing effect of the sealing ring cannot be guaranteed are solved. Further, by setting the size of the annular seal surface to be not less than 1/2 of the size of the post hole 3111 in the axial direction of the post hole 3111, the effect of sealing the seal ring 33 with respect to the post 32 and the post hole 3111 is ensured.

It should be understood that the annular sealing surface is annularly disposed on the outer peripheral surface of the sealing ring 33, wherein the dimension of the annular sealing surface in the axial direction of the post hole 3111 is the height of the sealing surface, the dimension of the post hole in the axial direction of the post hole 3111 is the height of the post hole, and the height of the annular sealing surface of the sealing ring 33 is set to be greater than or equal to 1/2 of the height of the post hole 3111, so that the contact area between the sealing ring 33 and the post hole 3111 can sufficiently meet the sealing requirement, and the occurrence of sealing failure due to the fact that the area of the annular sealing surface is too small is prevented.

In addition, when the height of the annular seal surface is smaller than the height of the post hole 3111, the annular seal surface may be disposed corresponding to any position in the height direction of the post hole 3111, for example, the annular seal surface is flush with one end of the post hole 3111, or the annular seal surface is disposed corresponding to the middle position of the post hole 3111.

It should be noted that the sealing ring 33 is sleeved on the pole post 32, the inner ring of the sealing ring 33 has a sealing interface, the sealing interface is used for being abutted to the pole post 32 to seal between the sealing ring 33 and the pole post 32, the sealing interface surrounds the pole post 32 for a circle, and the height of the sealing interface may be equal to the thickness of the sealing ring 33 (the dimension in the height direction of the pole post hole 3111) or smaller than the thickness of the sealing ring 33. When the height of the sealing interface is less than the thickness of the sealing ring 33, the sealing interface may be flush with one end of the sealing ring 33, or may be provided in any region of the inner ring between the two ends of the sealing ring 33.

In some embodiments of the present application, the size of the annular sealing surface is not less than 1mm in the axial direction of the post hole 3111.

Specifically, in the axial direction of utmost point post hole 3111, when the size of annular seal face is less than 1mm, the seal position of the seal structure that forms between annular seal face and utmost point post hole 3111 is comparatively thin, and the sealed of seal position is comparatively fragile, when there is external interference such as vibration, the condition of sealing failure easily appears in the seal position.

In this application, in utmost point post hole 3111's axial direction, on the basis of the size of annular sealing face not less than 1/2 of utmost point post hole 3111's size, through further not less than 1mm with the size of annular sealing face for in utmost point post hole 3111's axial direction, area of contact is great between sealing washer 33 and utmost point post hole 3111, thereby has guaranteed to have sufficient sealed region between sealing washer 33 and utmost point post 32, and then has guaranteed sealed effect.

It should be noted that, in the present application, the size of the annular sealing surface in the axial direction of the pole hole 3111 may be any one of 1mm, 1.3mm, 1.6mm, 1.9mm, 2.2mm, 2.6mm, 2.9mm, and 3.2mm … ….

In some embodiments of the present application, the size of the annular sealing surface in the axial direction of the post hole is any one of [1.2mm,2.5mm ].

Specifically, in the axial direction in utmost point post hole, when the size of the ring seal face is more than or equal to 1mm and is less than 1.2mm, although the ring seal face can seal utmost point post hole 3111, but, sealing strength is relatively poor, can't guarantee the stability of sealed effect, when the size of ring seal face is greater than 2.5mm, although sealed effect and stability are preferred, but it has led to the increase of the whole size in sealed position, when end cover assembly 3 installs on the casing 1 of battery monomer 10, more space has been occupied, the space utilization of battery monomer 10 has been reduced.

In the present application, the size of the annular sealing surface is set to be within the range of [1.2mm,2.5mm ] further in the axial direction of the post hole, so that the area of the sealing region is further ensured between the sealing ring 33 and the post hole 3111 in the axial direction of the post hole 3111, and the sealing effect is ensured.

It should be noted that, in the present application, the size of the annular sealing surface may further be any one of 1.2mm, 1.4mm, 1.5mm, 1.7mm, 1.8mm, 2mm, 2.1mm, 2.3mm, and 2.4mm … … 2.5mm in the axial direction of the post hole.

In some embodiments of the present application, the seal ring 33 has a dimension L in a radial direction of the post bore 3111, where L ∈ [0.5mm,3mm ], as shown in FIG. 12.

Specifically, in the radial direction of the pole post hole 3111, the size of the seal ring 33 is the thickness (L) of the seal ring 33, when the thickness of the seal ring 33 is less than 0.5mm, the strength of the seal ring 33 itself is low, at this time, the seal ring 33 is easy to deform, and because the strength of the seal ring 33 is low, the sealing strength at the sealing position is relatively poor, and the situation of sealing failure is easy to occur; when the thickness of sealing washer 33 is greater than 3mm, the intensity of sealing washer 33 was higher relatively this moment, and the compressive capacity is less when sealing washer 33 seals, can't reach sealed requirement to lead to sealed effect unsatisfactory.

In the present application, in the radial direction of the pole hole 3111, the size of the sealing ring 33 is set, and the value of the size is set between [0.5mm,3mm ], so that the sealing ring 33 has a certain strength, which is convenient for controlling the compression amount of the sealing ring 33, so as to improve the stability of the compression amount, thereby ensuring the sealing effect of the sealing ring 33 between the pole column 32 and the pole hole 3111.

It should be noted that, in the present application, the thickness (L) of the sealing ring 33 may be any one of 0.5mm, 0.8mm, 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8m, 2mm, 2.2mm, 2.4mm, 2.6mm, and 2.8mm … … mm.

In some embodiments of the present application, the sealing ring 33 is a rubber member, wherein the rubber member is a silicone member or a fluorine rubber member;

alternatively, the sealing ring 22 is a plastic member, wherein the plastic member is a soluble teflon member or a teflon member.

Specifically, the sealing ring 33 is used for sealing the space between the pole 32 and the pole hole 3111, the performance of the sealing ring 33 directly affects the sealing effect, and especially, when the use environment is relatively complex, whether the sealing ring 33 can adapt to the use environment or not directly affects the sealing effect, and therefore, what material is the sealing ring 33 is the most important factor for affecting the sealing effect.

In this application, through setting sealing washer 33 to rubber spare or plastic part, when guaranteeing to have good sealed effect, sealing washer 33 stable performance, environmental suitability is strong, has avoided further guaranteeing sealed effect because of the condition that environmental change leads to sealing washer 33 to become invalid.

In some embodiments of the present application, the sealing ring is a silicone piece, a viton piece, a soluble teflon piece, or a teflon piece.

Specifically, by providing the seal ring 33 as a rubber member and providing the rubber member as a silicone rubber member or a fluororubber member, the situation in which the seal ring 33 itself is able to permeate moisture to cause seal failure is prevented.

By providing the seal ring 33 as a plastic member and providing the plastic member as a soluble Polytetrafluoroethylene (PFA) member or a polytetrafluoroethylene member (PTFA), the situation in which the seal ring 33 itself is permeable to moisture to cause seal failure is also prevented.

In some embodiments of the present application, as shown in fig. 11 and 12, in an axial direction of the pole hole 3111, a dimension of the sealing ring 33 is greater than a dimension of the pole hole 3111, the pole 32 is provided with a flange structure 321, the flange structure 321 is located outside the pole hole 3111 and extends to a radial outside of the pole hole 3111, a skirt 331 is provided on a body of the sealing ring 33 located outside the pole hole 3111, the skirt 331 extends to the radial outside of the pole hole 3111, the end cover 31 includes a top cover 311, the pole hole 3111 is opened on the top cover 311, and two opposite sides of the skirt 331 respectively abut against a lower surface of the top cover 311 and an upper surface of the flange structure 321.

The lower surface of the top cover 311 is a side surface of the top cover 311 facing the inside of the case 1 when the end cap 31 is fitted to the opening of the case 1 of the battery cell 10.

The upper surface of the flange structure 321 means that the flange structure 321 faces the side of the top cover 311.

Specifically, the flange structure 321 is formed on the outer peripheral surface of the pole post 32, and the flange structure 321 protrudes out of the outer peripheral surface of the pole post 32, when the pole post 32 is mounted on the end cover 31, a part of the structure of the pole post 32 is inserted into the pole post hole 3111, the flange structure 321 is located outside the pole post hole 3111 (in the radial direction of the pole post hole 3111, the size of the flange structure 321 is larger than that of the pole post hole 3111, that is, the flange structure 321 cannot pass through the pole post hole 3111), the sealing ring 33 is provided with a skirt 331 (in the radial direction of the pole post hole 3111, the size of the skirt 331 is larger than that of the pole post hole 3111, that is, the skirt 331 cannot pass through the pole post hole 3111), when the sealing ring 33 is fitted on the pole post 32, one side of the skirt 331 abuts against the flange structure 321, when the pole post 32 is mounted in the skirt hole 3111, the outer ring sealing surface of the sealing ring 33 abuts against the top cover of the end cover 31, that is, that the inner ring 311 and the outer ring 311 of the pole post 33 abut against the pole post hole 3111 and the flange 3111, respectively.

The flange structure 321 of the pole post 32 and the skirt 331 of the sealing ring 33 are both located outside the pole post hole 3111, the flange structure 321 and the top cover 311 are used for clamping the skirt 331, and the sealing structure is additionally arranged between the outside of the pole post hole 3111 and the top cover 311 of the pole post 32, so that the sealing effect is further improved.

It should be understood that, the inner ring of the sealing ring 33 abuts against the pole post 32, the annular sealing surface of the sealing ring 33 abuts against the pole post hole 3111, the sealing ring 33 elastically deforms in the radial direction (horizontal direction) of the pole post hole 3111 to seal the space between the pole post hole 3111 and the pole post 32, and meanwhile, the skirt 331 abuts against the top cover 311 and the flange structure 321 respectively, so that the top cover 311 and the pole post 32 are vertically sealed, multiple sealing of the pole post 32 is realized, and the overall sealing performance is improved.

It should be noted that the end cover 31 further includes a bottom cover 312, the bottom cover 312 is fastened to the bottom of the top cover 311 to form the completed end cover 31, the bottom cover 312 is provided with a via hole at a position corresponding to the pole hole 3111 of the top cover 311, the size of the via hole is larger than that of the pole hole 3111, after the pole 32 is connected and fixed to the end cover 31, the bottom cover 312 is mounted at the bottom of the top cover 311 (the mounting may be clamping, bonding, welding, riveting or screwing, etc.), and the pole 32 passes through the via hole of the bottom cover 312 (the skirt 331 of the sealing ring 33 is spaced apart from the hole wall of the via hole to prevent the sealing ring 33 from being interfered by manufacturing tolerance, etc. to cause sealing failure). In addition, the bottom cover 312 is generally a plastic member, and by configuring the bottom cover 312 as a plastic member, when the end cover assembly 3 is used for the battery cell 10, the bottom cover 312 is configured to face the inside of the battery cell 10, and the bottom cover 312 configured as a plastic member can be used to implement an insulating configuration of the end cover 31, so as to prevent a safety hazard of a short circuit.

In some embodiments of the present application, the annular sealing surface and/or the wall surface of the post bore 3111 is provided with at least one protrusion 3112, the at least one protrusion 3112 extending in a radial direction of the post bore 3111.

Specifically, in this application, utmost point post hole 3111 is the circular port, the body that utmost point post 32 is located utmost point post hole 3111 is the cylindrical structure, the ring seal face is the at least partial structure of the outer lane of sealing washer 33, be equipped with protruding structure 3112 on at least one in the wall of ring seal face and utmost point post hole 3111, and protruding structure 3112 sets up to at least one, when sealing washer 33 sets up between utmost point post 32 and utmost point post hole 3111, in the position of protruding structure 3112, the compression volume of sealing washer 33 can be increased, thereby make protruding structure 3112 position form labyrinth seal structure, in order to improve sealed effect.

Through setting up protruding structure 3112 for sealing washer 33 has increased sealing washer 33's decrement when sealing between utmost point post 32 and utmost point post hole 3111, makes sealed effect obtain further promotion.

It should be understood that the protrusion 3112 may be provided only on the annular sealing surface of the sealing ring 33, only on the wall surface of the pole bore 3111, or on both the annular sealing surface and the wall surface of the pole bore 3111.

It should be noted that the shape of the protruding structure 3112 may be a dot structure, a continuous strip structure, an interrupted strip structure, or other shape structures (regular or irregular).

In some embodiments of the present application, an inner wall surface of the pole bore 3111 is provided with a boss structure 3112 along a circumferential direction thereof.

Specifically, as shown in fig. 12, the protrusion 3112 is disposed on the inner wall surface of the post hole 3111, and the protrusion encircles a circle of the post hole 3111, so that the compression amount of the seal ring 33 in the circumferential direction can be increased by the protrusion, and the sealing effect is further improved.

In addition, with protruding structure 3112 setting on utmost point post hole 3111's pore wall, reduced sealing washer 33's the processing degree of difficulty, reduced the cost of processing.

In some embodiments of the present application, as shown in fig. 12, the dimension of the protrusion structure in the radial direction of the pole bore 3111 is m, where m e [0.05mm,0.2mm ].

Specifically, in the radial direction of the pole column hole, the size of the protruding structure is the protruding height, when the protruding height of the protruding structure is less than 0.05mm, the local compression of the protruding structure and the seal ring 33 is limited, the improvement performance of the sealing effect of the seal ring 33 is not large, and when the protruding height of the protruding structure is greater than 0.2mm, the local compression amount of the protruding structure and the seal ring 33 is large, so that the seal ring 33 is easily damaged, and the sealing failure is caused.

In this application, set up the protruding height of protruding structure, can further realize the control to sealing washer 33 decrement for sealed effect between utmost point post 32 and utmost point post hole 3111 has obtained the assurance.

It should be noted that, in the present application, the protrusion height m of the protrusion structure may be any value of 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19 … … 0.2.0.2 mm.

In some embodiments of the present application, as shown in fig. 12, the dimension of the protrusion structure along the pole bore 3111 in the axial direction of the pole bore 3111 is n, where n e [0.1mm,0.5mm ].

Specifically, in the axial direction of the pole hole 3111, the size of the protruding structure is the width of the protruding structure, and when the width of the protruding structure is smaller than 0.1mm, the local compression between the protruding structure and the sealing ring 33 is limited, and at this time, the improvement performance of the sealing effect of the sealing ring 33 is not great; because the size of the annular sealing surface is limited, when the width of the bulge structure is larger than 0.5mm, the local compression amount of the bulge structure and the sealing ring 33 is larger, and the other positions of the annular sealing surface are easily affected.

In this application, on utmost point post hole 3111's axial direction, set for protruding structure's size, increased protruding structure to sealing washer 33's influence, further increased the compressive capacity of sealing washer 33 at sealed in-process for sealed effect has obtained the improvement.

Note that, in the axial direction of the post hole 3111, the cross-sectional shape of the boss structure may be rectangular, triangular, trapezoidal, or the like, where a dimension n of the boss structure in the axial direction of the post hole 3111 is a dimension of a connection position of the boss structure with the inner wall surface of the post hole 3111.

It should be noted that, in the present application, the protrusion height n of the protrusion structure may be any one of 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, and 0.45mm … … 0.5 mm.

A second aspect of the present application proposes a battery cell 10, the battery cell 10 comprising the end cap assembly 3 as above.

According to the single battery 10 of this application, as shown in fig. 4 to 12, the sealing ring 33 of the end cover assembly 3 is sleeved on the post 32, and the sealing ring 33 is clamped between the post 32 and the post hole 3111, and the sealing ring 33 is radially extruded to realize the sealing between the post 32 and the post hole 3111, so that the problems that in the prior art, the size in the vertical direction is limited more, the size fluctuation of the compression amount of the sealing ring is large due to manufacturing tolerance and other reasons, and the sealing effect of the sealing ring cannot be ensured are solved. And the size of the annular sealing surface is set to be not less than 1/2 of the size of the pole column hole in the axial direction of the pole column hole, so that the sealing effect of the sealing ring on the pole column and the pole column hole is ensured.

A third aspect of the present application provides a battery including: such as the battery cell 10 above.

According to the battery of this application, the battery has battery monomer 10, as shown in fig. 4 to 12, the sealing washer 33 suit of the end cover subassembly 3 of battery monomer 10 is on utmost point post 32 to sealing washer 33 is pressed from both sides and is established between utmost point post 32 and utmost point post hole 3111, utilizes sealing washer 33 footpath to be extrudeed and has realized the sealed between utmost point post 32 and utmost point post hole 3111, has solved among the prior art, and the size is injectd more in the vertical direction, and the size of the volume of compression of because of reasons such as manufacturing tolerance leads to the sealing washer fluctuates greatly, can't guarantee the problem of the sealed effect of sealing washer. And the size of the annular sealing surface is set to be not less than 1/2 of the size of the pole column hole in the axial direction of the pole column hole, so that the sealing effect of the sealing ring on the pole column and the pole column hole is ensured.

In a fourth aspect of the present application, an electric device includes the above battery, and the battery is used for providing electric energy.

According to the electric device of this application, the battery of electric device has battery monomer 10, as shown in fig. 4 to 12, the sealing washer 33 suit of the end cover subassembly 3 of battery monomer 10 is on utmost point post 32, and sealing washer 33 is pressed from both sides and is established between utmost point post 32 and utmost point post hole 3111, utilize sealing washer 33 footpath to be upwards extrudeed and realized the sealed between utmost point post 32 and utmost point post hole 3111, solved prior art, the size is injectd more in the vertical direction, because reasons such as manufacturing tolerance lead to the size of the compression volume of sealing washer undulant greatly, can't guarantee the problem of the sealed effect of sealing washer. And the size of the annular sealing surface is set to be not less than 1/2 of the size of the pole column hole in the axial direction of the pole column hole, so that the sealing effect of the sealing ring on the pole column and the pole column hole is ensured.

In the embodiment of the present application, as shown in fig. 4 to 12, the present application proposes an end cover assembly 3, the end cover assembly 3 includes an end cover 31, a post 32, and a sealing ring 33, the end cover 31 is provided with a post hole 3111, at least a portion of the post 32 is mounted in the post hole 3111 and is disposed at an interval from the post hole 3111, the sealing ring 33 is sleeved on the post 32, the sealing ring 33 is clamped between the post 32 and the post hole 3111, the sealing ring 33 is provided with an annular sealing surface for abutting against the post hole 3111, and the height of the annular sealing surface is greater than or equal to 1/2 of the height of the post hole 3111. Specifically, the sealing ring 33 is sleeved on the pole post 32, the sealing ring 33 is clamped between the pole post 32 and the pole post hole 3111, the sealing ring 33 is radially extruded to realize the sealing between the pole post 32 and the pole post hole 3111, and the problems that in the prior art, the size in the vertical direction is limited more, the size fluctuation of the compression amount of the sealing ring is large due to manufacturing tolerance and the like, and the sealing effect of the sealing ring cannot be guaranteed are solved. And the size of the annular sealing surface is set to be not less than 1/2 of the size of the pole column hole in the axial direction of the pole column hole, so that the sealing effect of the sealing ring on the pole column and the pole column hole is ensured.

Further, the height of the annular sealing surface is larger than or equal to 1mm, and specifically, the value can be taken between 1.2mm and 2.5mm, so that the contact area of the pole hole 3111 is maximally utilized in the height direction, and the sealing effect is ensured.

Further, the sidewall thickness of the seal ring 33 (the dimension of the seal ring 33 between the post 32 and the post hole 3111) is between 0.5mm and 3mm, so that the compression amount of the seal ring 33 is easily controlled, and the stability of the compression amount is improved.

Further, the sealing ring 33 may be made of polymer plastic such as fluoro-rubber, soluble Polytetrafluoroethylene (PFA) or Polytetrafluoroethylene (PTFA), so as to prevent the material of the sealing ring 33 from permeating water vapor, thereby further ensuring the sealing effect.

Further, the end cover 31 includes a top cover 311, the pole hole 3111 is specifically opened on the top cover 311, one end of the sealing ring 33 is provided with a skirt 331, the pole 32 is provided with a flange structure 321, a part of the structure of the pole 32 penetrates through the pole hole 3111, the flange structure 321 is located outside the pole hole 3111 (the size of the flange structure 321 is larger than that of the pole hole 3111, that is, the flange structure 321 cannot pass through the pole hole 3111), the sealing ring 33 is provided with a skirt 331 (the size of the skirt 331 is larger than that of the pole hole 3111, that is, the skirt 331 cannot pass through the pole hole 3111), when the sealing ring 33 is sleeved on the pole 32, one side of the skirt 331 abuts against the flange structure 321, when the pole 32 is installed in the pole hole 3111, an annular sealing surface of an outer ring of the sealing ring 33 abuts against the pole hole 3111, a side of the skirt 331 which deviates from the flange structure 321 abuts against the top cover 311, that is, that an inner ring and an outer ring of the sealing ring 33 abut against the pole 32 and the pole 3111, and the top cover 311 abut against the flange 321, respectively. The skirt 331 is arranged to enable the position of the pole 32 to be sealed in multiple ways, and therefore the sealing effect is improved.

Furthermore, a circle of protruding structures are arranged on the inner wall surface of the pole hole 3111, the protruding height of each protruding structure ranges from 0.05mm to 0.2mm, the width of each protruding structure (the size of each protruding structure in the height direction of the pole hole 3111) ranges from 0.1mm to 0.5mm, and by means of the protruding structures, the local compression amount of the sealing ring 33 is increased, and the sealing performance is improved.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. An end cap assembly, comprising:

the end cover is provided with a pole column hole;

the pole column is at least partially arranged in the pole column hole;

2. An end cap assembly according to claim 1 wherein the annular sealing surface has a dimension of no less than 1mm in an axial direction of the post bore.

3. The end cap assembly of claim 2, wherein the annular sealing surface has a dimension of any one of [1.2mm,2.5mm ] in an axial direction of the post bore.

4. The end cap assembly of claim 1, wherein the seal ring has a dimension L in a radial direction of the post bore, wherein L e [0.5mm,3mm ].

5. The end cap assembly of claim 1, wherein the seal ring is a rubber member, the rubber member being a silicone member or a viton member;

6. The end cap assembly of claim 1, wherein the sealing ring has a dimension in an axial direction of the post hole that is greater than a dimension of the post hole, the post has a flange structure that is located outside the post hole and extends radially outward of the post hole, the sealing ring has a skirt on a body located outside the post hole, the skirt extends radially outward of the post hole, the end cap includes a top cap, the post hole is opened on the top cap, and opposite sides of the skirt abut against a lower surface of the top cap and an upper surface of the flange structure, respectively.

7. The end cap assembly of claim 1, wherein the annular sealing surface and/or an inner wall surface of the post bore is provided with at least one raised formation extending radially of the post bore.

8. An end cap assembly according to claim 7 wherein the inner wall surface of the post hole is provided with said boss structure extending circumferentially thereof.

9. An end cap assembly according to claim 8 wherein the projection arrangement has a dimension m in a radial direction of the post hole, where m e [0.05mm,0.2mm ].

10. The end cap assembly of claim 8 wherein the projection arrangement has a dimension n in an axial direction of the post bore, wherein n e [0.1mm,0.5mm ].

11. A battery cell comprising an end cap assembly according to any one of claims 1 to 10.

12. A battery, comprising: the battery cell of claim 11.

13. An electrical consumer, characterized in that the consumer comprises a battery according to claim 12 for providing electrical energy.