CN218385462U - End cover assembly, battery monomer, battery and consumer - Google Patents

Abstract

The utility model relates to an end cover assembly, a battery monomer, a battery and electric equipment, the end cover assembly comprises a cover body, an electrode terminal and a sealing ring, the cover body is provided with a first mounting hole, the electrode terminal comprises a body and a pole post fixed on the body, the pole post passes through the first mounting hole, the sealing ring is arranged between the outer wall of the pole post and the inner wall of the first mounting hole; in a first direction perpendicular to the thickness direction of the cover body, the distance between the outermost side of the sealing ring and the innermost side of the sealing ring is L1, the difference value between the inner diameter of the first mounting hole and the outer diameter of the pole is L2, and L1 is greater than L2. A battery cell comprises a shell, an electrode assembly and the end cover assembly. A battery comprises a plurality of battery single cells and a bus component. An electric device comprises the battery cell or the battery. Foretell end cover subassembly, battery monomer, battery and consumer can improve the leakproofness between first mounting hole and utmost point post, reduces the weeping risk between utmost point post and the first mounting hole.

Description

End cover assembly, battery monomer, battery and consumer

Technical Field

The utility model relates to a power battery technical field especially relates to an end cover subassembly, battery monomer, battery and consumer.

Background

With the popularization and the promotion of new energy automobiles, the charging and discharging performance, the cruising ability and the like of the new energy automobiles increasingly attract people's attention and attention. The power battery is a rechargeable battery, is a power source of the new energy automobile, and is widely applied to the field of the new energy automobile.

At present, in an end cover assembly of a battery, a pole column is inserted into a mounting hole of a cover body, and a sealing ring is arranged between the mounting hole and the pole column to realize sealing connection. But current end cover subassembly, it is askew easily with the sealing washer dress, lead to the sealing washer part to wear out outside the mounting hole and expose, can't realize the effective seal of mounting hole and utmost point post, the leakproofness is relatively poor and have the weeping risk.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide an end cap assembly, a battery cell, a battery, and an electric device, in order to solve the problem of poor sealing performance of the end cap assembly.

An end cover assembly comprises a cover body, an electrode terminal and a sealing ring, wherein the cover body is provided with a first mounting hole, the electrode terminal comprises a body and a pole column fixed on the body, the body is positioned on one side of the cover body, the pole column penetrates through the first mounting hole, and the sealing ring is arranged between the outer wall of the pole column and the inner wall of the first mounting hole; in a first direction perpendicular to the thickness direction of the cover body, the distance between the outermost side of the sealing ring and the innermost side of the sealing ring is L1, the difference value between the inner diameter of the first mounting hole and the outer diameter of the pole is L2, and L1 is greater than L2. Foretell end cover subassembly, the internal diameter through making the interval on the innermost outside limit of sealing washer be greater than first mounting hole and the difference of the external diameter of utmost point post, at the in-process of installation sealing washer, prevent that the sealing washer from passing the clearance of first mounting hole and utmost point post and leading to the sealing washer to expose, can improve the leakproofness between first mounting hole and utmost point post, reduce the weeping risk between utmost point post and the first mounting hole.

In some embodiments, the sealing ring comprises a sealing portion and a supporting portion arranged around the periphery of the sealing portion, the outer diameter of the supporting portion is larger than that of the sealing portion, the first mounting hole comprises a sealing hole section and a first limiting hole section connected with the sealing hole section, and the hole diameter of the first limiting hole section is larger than that of the sealing hole section so as to accommodate the supporting portion. So, the sealing washer includes the supporting part, and the supporting part holding is in first spacing hole section, effectively spacing in order to prevent that its position from taking place to move the sealing washer.

In some embodiments, the sealing portion has a first outer edge and a first inner edge, and the supporting portion has a second outer edge and a second inner edge; in the first direction, the second outer edge exceeds the first outer edge, and the second inner edge does not exceed the second inner edge. So, through the interval of the inside and outside of injecing the sealing washer, can prevent that the sealing washer from passing the clearance of first mounting hole and utmost point post, strengthen sealed reliability.

In some embodiments, the sealing portion and the supporting portion are closed rings, and the central axes of the sealing portion and the supporting portion overlap. Therefore, the mechanical strength of the sealing ring can be improved, and the sealing performance of the sealing ring is enhanced.

In some embodiments, the sealing portion is a closed ring, and the supporting portion is a plurality of bosses annularly and uniformly distributed on the periphery of the sealing portion. Therefore, the production cost of the sealing ring can be reduced on the basis of meeting the sealing performance of the sealing ring.

In some of these embodiments, the support portion has a rectangular or trapezoidal longitudinal cross-section. Therefore, the cross section of the supporting part is rectangular or trapezoidal, so that the supporting part is easier to limit when being installed, and the position of the supporting part is not easy to move.

In some embodiments, the sealing portion and the supporting portion are integrally formed. So, the wholeness of sealing washer is good, the quick assembly disassembly of the sealing washer of being convenient for. In some embodiments, the end cap assembly further includes a first insulating member disposed between the body and the cover, the first insulating member having a receiving groove for receiving the supporting portion. Therefore, the first insulating part is arranged to block the electric connection between the pole and the cover body; the first insulating part is provided with an accommodating groove for accommodating the supporting part, so that the space utilization rate of the first insulating part can be improved.

In some embodiments, the pole comprises a first limiting shaft section, and the supporting portion is clamped between the first limiting shaft section and the first limiting hole section. So, the supporting part presss from both sides and locates between first spacing shaft part and the first spacing hole section, effectively spacing in order to prevent that its position from taking place to move the sealing washer, and strengthens the sealing reliability between utmost point post and first mounting hole.

In some embodiments, the pole comprises a sealing shaft section connected to the first limiting shaft section, and the sealing portion is clamped between the sealing shaft section and the sealing hole section. So, the sealing portion presss from both sides and locates between sealed shaft section and the sealed hole section, effectively is spacing in order to prevent that its position from taking place to move the sealing washer, and further strengthens the sealing reliability between utmost point post and first mounting hole.

In some embodiments, the end cap assembly further includes a connecting member and a second insulating member, the connecting member is disposed on a side of the cap body away from the body and is used for connecting with a bus member electrically connected with the plurality of battery cells; the pole column penetrates through the first mounting hole and is riveted with the connecting piece, and the second insulating piece is arranged between the connecting piece and the cover body. So, utmost point post passes through the connecting piece and connects the part that converges to through the electricity between second insulating part separation connecting piece and the lid, structural stability is higher.

In some embodiments, the first mounting hole further includes a second limiting hole section located at one end of the sealing hole section close to the second insulating member, the pole includes a second limiting shaft section connected to the sealing shaft section, the second insulating member has a limiting protrusion, and the limiting protrusion is located between the second limiting shaft section and the second limiting hole section. Therefore, the limiting bulge is arranged between the second limiting shaft section and the second limiting hole section, so that the sealing part can be completely accommodated in the sealing hole section, and reliable sealing is formed; form reliable location and insulation simultaneously, prevent that utmost point post from rocking or short circuit between utmost point post and the lid.

A battery monomer comprises a shell, an electrode assembly and the end cover assembly, wherein the shell is provided with an opening, the electrode assembly is arranged in the shell and is provided with a lug, a cover body is arranged in the opening, and a body is positioned in the shell and is used for electrically connecting the lug. Foretell battery monomer, the leakproofness between the first mounting hole of end cover subassembly and utmost point post is better, and the weeping risk between utmost point post and the first mounting hole is little.

A battery comprises a plurality of battery monomers and a bus-bar component, wherein the bus-bar component is used for electrically connecting the battery monomers. The battery has small leakage risk of the battery monomer and high use safety.

An electric device comprises the battery cell or the battery. The electric equipment has the advantages of small leakage risk of the single battery or the battery and high use safety.

Drawings

FIG. 1 is a schematic illustration of a vehicle according to an embodiment;

FIG. 2 is a schematic diagram of a battery according to an embodiment;

FIG. 3 is a schematic diagram of a battery cell according to one embodiment;

FIG. 4 is a schematic view of an electrode assembly according to one embodiment;

FIG. 5 is an exploded view of an end cap assembly according to one embodiment;

FIG. 6 is a top view of the end cap assembly shown in FIG. 5;

FIG. 7 isbase:Sub>A cross-sectional view taken along the plane A-A of the end cap assembly shown in FIG. 6;

FIG. 8 is an enlarged view of portion B of the endcap assembly of FIG. 7;

FIG. 9 is a cross-sectional view of the cover of the end cap assembly shown in FIG. 5;

FIG. 10 is a cross-sectional view of a seal ring in the end cap assembly of the first embodiment;

FIG. 11 is a schematic view of a seal ring in the end cap assembly of the second embodiment;

FIG. 12 is a schematic view of a seal ring in a third embodiment endcap assembly.

Reference numerals are as follows:

10. a vehicle; 11. a controller; 12. a motor; 20. a battery; 21. a box body; 21a, a first portion; 21b, a second portion; 22. a battery cell; 23. a housing; 23a, an opening; 24. an electrode assembly; 24a, a first pole piece; 24b, a second pole piece; 24c, a membrane; 25. an end cap assembly; 100. a cover body; 110. a first mounting hole; 111. sealing the hole section; 112. a first limiting hole section; 113. a second limiting hole section; 200. an electrode terminal; 210. a body; 220. a pole column; 221. sealing the shaft section; 222. a first limiting shaft section; 223. a second limiting shaft section; 300. a seal ring; 310. a sealing part; 311. a first outer edge; 312. a first inner edge; 320. a support portion; 321. a second outer edge; 322. a second inner edge; 400. a first insulating member; 410. accommodating grooves; 420. a second mounting hole; 500. a connecting member; 600. a second insulating member; 610. a third mounting hole; 620. a limiting bulge; x, a first direction; y, thickness direction.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only 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 an associated 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 sets), "plural pieces" refers to two or more (including two pieces).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships that are based on the orientations and positional relationships shown in the drawings, and are used for convenience in describing the embodiments of the present application and for simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, 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 stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The 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.

With the popularization and the promotion of new energy automobiles, the charging and discharging performance, the cruising ability and the like of the new energy automobiles increasingly attract people's attention and attention. The power battery is a rechargeable battery, is a power source of the new energy automobile, and is widely applied to the field of the new energy automobile.

At present, in an end cover assembly of a battery, a pole column is inserted into a mounting hole of a cover body, and a sealing ring is arranged between the mounting hole and the pole column to realize sealing connection. But current end cover subassembly, it is askew to adorn the sealing washer easily, leads to the sealing washer part to wear out outside the mounting hole and expose, can't realize effective sealed of mounting hole and utmost point post, and the leakproofness is relatively poor and have the weeping risk.

Based on the above consideration, through intensive research, an end cover assembly, a battery cell, a battery and electric equipment are designed. In the free end cover subassembly of battery, the internal diameter that is greater than first mounting hole through the interval that makes the innermost outside limit of sealing washer and the difference of the external diameter of utmost point post, at the in-process of installation sealing washer, prevent that the sealing washer from passing the clearance of first mounting hole and utmost point post and leading to the sealing washer to expose, can improve the leakproofness between first mounting hole and utmost point post, reduce the weeping risk between utmost point post and the first mounting hole.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric device can 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, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

For convenience of description, the following embodiments will be described by taking a power-driven apparatus according to an embodiment of the present application as an example of the vehicle 10.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 10 according to some embodiments of the present disclosure. The vehicle 10 may be a fuel-oil vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle, etc. The interior of the vehicle 10 is provided with a battery 20, and the battery 20 may be provided at the bottom or at the head or tail of the vehicle 10. The battery 20 may be used for power supply of the vehicle 10, for example, the battery 20 may serve as an operation power source of the vehicle 10. The vehicle 10 may also include a controller 11 and a motor 12, with the controller 11 being used to control the battery 20 to power the motor 12, for example, for start-up, navigation, and operational power requirements while the vehicle 10 is traveling. In other embodiments of the present application, the battery 20 may serve not only as an operating power source for the vehicle 10, but also as a driving power source for the vehicle 10, instead of or in part instead of fuel or natural gas, to provide driving force for the vehicle 10.

Referring to fig. 2, fig. 2 is an exploded view of a battery 20 according to some embodiments of the present disclosure. The battery 20 includes a case 21 and a battery cell 22, and the battery cell 22 is accommodated in the case 21. The case 21 is used to provide a receiving space for the battery cells 22, and the case 21 may have various structures. In some embodiments, the case 21 may include a first portion 21a and a second portion 21b, the first portion 21a and the second portion 21b cover each other, and the first portion 21a and the second portion 21b together define a receiving space for receiving the battery cell 22. The second portion 21b may be a hollow structure with one open end, the first portion 21a may be a plate-shaped structure, and the first portion 21a covers the open side of the second portion 21b, so that the first portion 21a and the second portion 21b jointly define a receiving space; the first portion 21a and the second portion 21b may be both hollow structures with one side open, and the open side of the first portion 21a may cover the open side of the second portion 21 b. Of course, the first portion 21a and the second portion 21b may form the box 21 in various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 20, there may be a plurality of battery cells 22, and the plurality of battery cells 22 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the plurality of battery cells 22. The plurality of battery monomers 22 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery monomers 22 is accommodated in the box body 21; of course, the battery 20 may also be a battery module formed by connecting a plurality of battery cells 22 in series, in parallel, or in series-parallel, and a plurality of battery modules are connected in series, in parallel, or in series-parallel to form a whole, and are accommodated in the box 21.

Wherein each battery cell 22 may be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cells 22 may be cylindrical, flat, rectangular, or other shapes, etc. In the present application, the battery cells 22 may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiments of the present application. The battery cells 22 may be cylindrical, flat, rectangular, or other shapes, which is not limited in the embodiments of the present application.

As will be described in detail below with respect to any one of the cells 22, with reference to fig. 3, the cell 22 includes a housing 23, an electrode assembly 24, and an end cap assembly 25. The housing 23 is a hollow rectangular parallelepiped or a cube, and one of the planes of the housing 23 has an opening 23a, which is configured without a wall so that the housing 23 communicates inside and outside. The end cap assembly 25 covers the opening 23a and is coupled to the case 23 to form a closed cavity for housing the electrode assembly 24, and the closed cavity is filled with an electrolyte, such as an electrolytic solution. Referring to fig. 4, the electrode assembly 24 is formed primarily by winding or stacking a first pole piece 24a and a second pole piece 24b, and a separator 24c is generally provided between the first pole piece 24a and the second pole piece 24 b. The first pole piece 24a and the second pole piece 24b have opposite polarities, and the first pole piece 24a may be a positive pole piece or a negative pole piece.

Referring to fig. 5 to 7, an embodiment of the end cap assembly 25 includes a cap body 100, an electrode terminal 200 and a sealing ring 300, the cap body 100 is provided with a first mounting hole 110, the electrode terminal 200 includes a body 210 and a post 220 fixed to the body 210, the body 210 is located at one side of the cap body 100, the post 220 passes through the first mounting hole 110, and the sealing ring 300 is disposed between an outer wall of the post 220 and an inner wall of the first mounting hole 110. In a first direction perpendicular to the thickness direction of the cover body 100, a distance between an outermost side of the sealing ring 300 and an innermost side of the sealing ring 300 is L1, a difference between an inner diameter of the first mounting hole 110 and an outer diameter of the pole 220 is L2, and L1> L2.

Here, the thickness direction of the lid body 100 is the Y direction shown in fig. 5, and the first direction is the X direction shown in fig. 5. Fig. 10 shows a distance L1 between the outermost side of the seal ring 300 and the innermost side of the seal ring 300, and fig. 7 shows a difference L2 between an inner diameter D1 of the first mounting hole 110 and an outer diameter D2 of the pole 220.

In some embodiments of the present application, referring to fig. 3, the battery cell 22 further includes a housing 23, and the end cap assembly 25 refers to a component covering the opening 23a of the housing 23 to isolate the internal environment of the battery cell 22 from the external environment. The lid body 100 may be provided with a functional member such as the electrode terminal 200, or a protective sheet and an explosion-proof valve for releasing the internal pressure when the internal pressure or temperature of the battery cell 22 reaches a threshold value.

In some embodiments of the present application, referring to fig. 3 and 5, the electrode terminal 200 is used to electrically connect with the electrode assembly 24 for outputting or inputting electrical energy of the battery cell 22. The body 210 is used for connecting with the tabs of the electrode assembly 24, and the pole 220 is used for connecting with the pole pieces of the electrode assembly 24.

In some embodiments of the present application, referring to fig. 3, the electrode assembly 24 is a component of the battery cell 22 where electrochemical reactions occur. Referring collectively to fig. 4, one or more electrode assemblies 24 may be contained within the housing 23, the electrode assemblies 24 being formed primarily by a first pole piece 24a and a second pole piece 24b wound or stacked, and a separator 24c typically disposed between the first pole piece 24a and the second pole piece 24 b. The portions of the first and second pole pieces 24a and 24b having the active material constitute the main body of the electrode assembly 24, and the portions of the first and second pole pieces 24a and 24b having no active material constitute tabs, respectively. The positive tab and the negative tab can be located at one end of the main body portion or at two ends of the main body portion respectively. During the charge and discharge of the battery 20, the positive and negative active materials react with the electrolyte, and the tabs are connected to the electrode terminal 200 to form a current loop. Fig. 4 shows an example in which the second tab 24b is a negative tab and the first tab 24a is a positive tab.

In some embodiments of the present application, referring to fig. 5, the sealing ring 300 is sleeved on the outer periphery of the pole 220 and is limited in the first mounting hole 110. Illustratively, the seal ring 300 may be plastic, rubber, or the like.

In the end cap assembly 25, the distance between the innermost and outer side edges of the sealing ring 300 is larger than the difference between the inner diameter of the first mounting hole 110 and the outer diameter of the pole column 220, so that the sealing ring 300 is prevented from being exposed due to the fact that the sealing ring 300 penetrates through the gap between the first mounting hole 110 and the pole column 220 in the process of mounting the sealing ring 300, the sealing performance between the first mounting hole 110 and the pole column 220 can be improved, and the leakage risk between the pole column 220 and the first mounting hole 110 is reduced.

According to some embodiments of the present disclosure, referring to fig. 6 and 7, the sealing ring 300 includes a sealing portion 310 and a supporting portion 320 surrounding the sealing portion 310, an outer diameter of the supporting portion 320 is greater than an outer diameter of the sealing portion 310, and referring to fig. 8 and 9, the first mounting hole 110 includes a sealing hole section 111 and a first limiting hole section 112 connected to the sealing hole section 111, and an aperture of the first limiting hole section 112 is greater than an aperture of the sealing hole section 111 to accommodate the supporting portion 320.

In the present embodiment, the material of the supporting portion 320 is the same as that of the sealing portion 310, that is, the supporting portion 320 and the sealing portion 310 have the same hardness. In other embodiments, the supporting portion 320 and the sealing portion 310 may have different hardness to meet the actual use requirement.

With the above arrangement, the sealing ring 300 includes the supporting portion 320, and the supporting portion 320 is accommodated in the first limiting hole segment 1112 to effectively limit the position of the sealing ring 300 to prevent the position from moving.

According to some embodiments of the present disclosure, please refer to fig. 10, the sealing portion 310 has a first outer edge 311 and a first inner edge 312, and the supporting portion 320 has a second outer edge 321 and a second inner edge 322; in the first direction, the second outer edge 321 exceeds the first outer edge 311, and the second inner edge 322 does not exceed the first inner edge 312.

Specifically, referring to fig. 10, the second outer edge 321 is an outermost edge of the seal ring 300, and the first inner edge 312 is an innermost edge of the seal ring 300. The second inner edge 322 does not extend beyond the first inner edge 312, and it is understood that the second inner edge 322 may or may not be flush with the first inner edge 312.

Through the above arrangement, the sealing ring 300 can be prevented from passing through the gap between the first mounting hole 110 and the pole column 220 by limiting the distance between the inner side and the outer side of the sealing ring 300, and the sealing reliability can be enhanced.

According to some embodiments of the present application, referring to fig. 11, the sealing portion 310 and the supporting portion 320 are closed rings, and the central axes of the two overlap.

In some embodiments of the present application, the sealing portion 310 and the supporting portion 320 are solid closed rings.

With the above arrangement, the mechanical strength of the seal ring 300 can be improved, and the sealing performance of the seal ring 300 can be enhanced.

According to some embodiments of the present application, please refer to fig. 12, the sealing portion 310 is a closed ring shape, and the supporting portion 320 is a plurality of bosses annularly and uniformly distributed on the outer periphery of the sealing portion 310.

In some embodiments of the present application, the boss may be rectangular block-shaped, dot-shaped, or other shapes.

In the present embodiment, the shapes and sizes of all the supporting portions 320 are identical. In other embodiments, the shapes and sizes of all the supporting portions 320 may not be completely the same or completely different.

Through the above arrangement, the production cost of the seal ring 300 can be reduced on the basis of satisfying the sealing performance of the seal ring 300.

According to some embodiments of the present application, please refer to fig. 10, the supporting portion 320 has a rectangular or trapezoidal longitudinal section.

Through the arrangement, the longitudinal section of the supporting part 320 is rectangular or trapezoidal, so that the supporting part 320 is easier to limit when being installed, and the position of the supporting part 320 is not easy to move.

According to some embodiments of the present application, please refer to fig. 10, the sealing portion 310 and the supporting portion 320 are an integrated structure.

Specifically, the sealing portion 310 and the supporting portion 320 may be processed as an integral structure by injection molding.

Through the arrangement, the sealing ring 300 is good in integrity, and the sealing ring 300 can be quickly disassembled and assembled conveniently.

According to some embodiments of the present disclosure, referring to fig. 7 and 8, the pole 220 includes a first limiting shaft section 222, and the supporting portion 320 is sandwiched between the first limiting shaft section 222 and the first limiting hole section 112.

Specifically, referring to fig. 7, the side wall of the sealing shaft section 221 and the side wall of the sealing hole section 111 are both disposed obliquely with respect to the axis of the first mounting hole 110, which can be understood that, along the thickness direction of the cover body 100 (i.e., the Y direction shown in fig. 7), the axial diameter of the sealing shaft section 221 gradually changes, and the aperture of the sealing hole section 111 gradually changes, so that the sealing shaft section 221 and the sealing hole section 111 both have a structure with one large end and one small end. The axial diameter of the sealing shaft section 221 and the aperture of the sealing hole section 111 may vary linearly or nonlinearly along the thickness direction of the cover 100.

In this embodiment, the sealing shaft section 221 and the sealing hole section 111 are both of a structure with a small top and a large bottom, the bottom end of the sealing shaft section 221 and the bottom end of the sealing hole section 111 are the end with a larger diameter, and the top end is the end with a smaller diameter. During installation, the sealing ring 300 is installed in the first installation hole 110 along the end with the larger diameter of the first installation hole 110, when the pole 220 is inserted into the first installation hole 110 from bottom to top along the axial direction of the first installation hole 110, the distance between the side wall of the sealing hole section 111 and the side wall of the sealing shaft section 221 is gradually reduced, the sealing ring 300 is extruded along the direction perpendicular to the side wall until the sealing ring 300 is installed in place, and the displacement or damage of the sealing ring 300 in the installation process of the pole 220 is effectively avoided.

In other embodiments, the sealing shaft section 221 and the sealing hole section 111 may also be configured to have a structure with a larger top and a smaller bottom, such that the top end of the sealing shaft section 221 and the top end of the sealing hole section 111 are the end with the larger diameter, and the bottom end of the sealing shaft section 221 and the bottom end of the sealing hole section are the end with the smaller diameter, and the pole 220 is installed in the first installation hole 110 from top to bottom.

In some embodiments of the present application, referring to fig. 8, the sidewall of the first limiting hole segment 112 is stepped, and the sidewall of the first limiting shaft segment 222 is flat to fit the supporting portion 320. Alternatively, the sidewall of the first limiting hole segment 112 may have an arc shape or other shape, and the sidewall of the first limiting shaft segment 222 may have an inclined surface or other shape.

Through the above arrangement, the supporting portion 320 is clamped between the first limiting shaft section 222 and the first limiting hole section 112, so as to effectively limit the position of the sealing ring 300 and prevent the sealing ring from moving, and enhance the sealing reliability between the pole 220 and the first mounting hole 110.

According to some embodiments of the present application, referring to fig. 7, the pole 220 includes a sealing shaft section 221 connected to the first limiting shaft section 222, and the sealing portion 310 is sandwiched between the sealing shaft section 221 and the sealing hole section 111.

Through the above arrangement of the sealing portion 310, the sealing portion is clamped between the sealing shaft section 221 and the sealing hole section 111, so that the sealing ring 300 is effectively limited to prevent the position thereof from moving, and the sealing reliability between the pole 220 and the first mounting hole 110 is further enhanced.

According to some embodiments of the present disclosure, referring to fig. 7, the end cap assembly 25 further includes a first insulating member 400, and the first insulating member 400 is disposed between the body 210 and the cover 100. Referring to fig. 5 in combination, the first insulating member 400 is provided with a receiving groove 410 for receiving the supporting portion 320.

Specifically, in the thickness direction of the cover body 100, the depth of the receiving groove 410 is smaller than the thickness of the supporting portion 320, so that the supporting portion 320 can be at least partially limited in the first limiting hole section 112 of the first mounting hole 110. Referring to fig. 5, the first insulating member 400 is provided with a second mounting hole 420 through which the pole 220 passes.

In some embodiments of the present application, the first insulating member 400 is a component for blocking the electrical connection between the body 210 of the post 220 and the cover 100, so as to reduce the risk of short circuit. Illustratively, the first insulating member 400 may be plastic, rubber, or the like.

Through the above arrangement, the first insulating member 400 is arranged to block the electrical connection between the post 220 and the cover body 100; the first insulating member 400 is provided with the receiving groove 410 for receiving the supporting portion 320, so that the space utilization rate of the first insulating member 400 can be improved.

According to some embodiments of the present disclosure, referring to fig. 7 and fig. 3, the end cap assembly 25 further includes a connecting member 500 and a second insulating member 600, wherein the connecting member 500 is disposed on a side of the cover 100 away from the main body 210 and is used for connecting with a bus member electrically connected to the plurality of battery cells 22; the pole 220 penetrates through the first mounting hole 110 and is riveted with the connecting member 500, and the second insulating member 600 is disposed between the connecting member 500 and the cover 100.

Here, referring to fig. 5 in combination, the second insulating member 600 is provided with a third mounting hole 610 through which the pole 220 passes.

In some embodiments of the present application, the terminal post 220 is riveted to the connecting member 500 to fix the electrode terminal 200, and the connecting member 500 is made of an aluminum alloy material to prevent deformation when being riveted. The connector 500 may be rectangular, circular, or other shapes. Here, the specific shape of the connector 500 is not limited.

In some embodiments of the present application, a bus member is used to connect the plurality of battery cells 22 in series or in parallel, and the bus member is welded to the connector 500.

In the present application, the second insulating member 600 is a member for isolating the electrical connection between the connecting member 500 and the cover body 100, so as to reduce the risk of short circuit. Illustratively, the second insulator 600 may be plastic, rubber, or the like.

Through the above arrangement, the pole 220 is connected to the bus bar through the connecting member 500, and is electrically connected to the cover 100 through the second insulating member 600 to block the connecting member 500, so that the structural stability is high.

According to some embodiments of the present application, referring to fig. 7 and 9, the first mounting hole 110 further includes a second limiting hole section 113 located at an end of the sealing hole section 111 close to the second insulating member 600, the pole 220 includes a second limiting shaft section 223 connected to the sealing shaft section 221, the second insulating member 600 has a limiting protrusion 620, and the limiting protrusion 620 is located between the second limiting shaft section 223 and the second limiting hole section 113.

In some embodiments of the present application, the side wall of the second stopper hole section 113 and the side wall of the second stopper shaft section 223 are disposed in parallel with respect to the axis of the first mounting hole 110.

Through the arrangement, the limiting protrusion 620 is arranged between the second limiting shaft section 223 and the second limiting hole section 113, so that the sealing part 310 can be completely accommodated in the sealing hole section 111, and reliable sealing is formed; meanwhile, reliable positioning and insulation are formed, and the pole 220 is prevented from shaking or short circuit between the pole 220 and the cover body 100.

Referring to fig. 3 and 5, a battery cell 22 in one embodiment includes a case 23, an electrode assembly 24 and the end cap assembly 25, the case 23 has an opening 23a, the electrode assembly 24 is disposed in the case 23 and has tabs, a cover 100 is disposed in the opening 23a, and a body 210 is disposed in the case 23 and is used for electrically connecting the tabs.

In the present application, the case 23 is an assembly for cooperating with the cover 100 to form an internal environment of the battery cell 22, wherein the formed internal environment may be used to house the electrode assembly 24, an electrolyte, and other components. The case 23 and the cover 100 may be separate members, and an opening 23a may be provided in the case 23, and the cover 100 may cover the opening 23a at the opening 23a to form an internal environment of the battery cell 22. Without limitation, the case 23 and the cover 100 may be integrated.

Specifically, the housing 23 and the cover 100 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 23, the housing 23 and the cover 100 are closed. The housing 23 may be of various shapes and various sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 23 may be determined according to the specific shape and size of the electrode assembly 24. The material of the housing 23 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment.

In the battery cell 22, the sealing performance between the first mounting hole 110 of the end cap assembly 25 and the pole 220 is good, and the risk of leakage between the pole 220 and the first mounting hole 110 is low.

Referring to fig. 2, a battery 20 in an embodiment includes a plurality of battery cells 22 and a bus member for electrically connecting the plurality of battery cells 22.

In the present application, a plurality of battery cells 22 may be connected in series, in parallel, or in series-parallel to form a battery 20 module, and a plurality of battery 20 modules are connected in series, in parallel, or in series-parallel to form a whole.

In the battery 20, the risk of leakage of the battery cells 22 is low, and the use safety is high.

Referring to fig. 1, an electric device in an embodiment includes the battery cell 22 or the battery 20. The electric equipment has small leakage risk of the battery cell 22 or the battery 20 and high use safety.

Referring to fig. 5 to 12, according to some embodiments of the present disclosure, an end cap assembly 25 in one embodiment includes a cap body 100, an electrode terminal 200, a sealing ring 300, a first insulating member 400, a connecting member 500, and a second insulating member 600. The electrode terminal 200 includes a body 210 and a terminal post 220 fixed to the body 210, the body 210 is located at one side of the cover 100, the first insulating member 400 is disposed between the body 210 and the cover 100, the connecting member 500 is disposed at one side of the cover 100 away from the body 210, the second insulating member 600 is disposed between the connecting member 500 and the cover 100, the cover 100 is provided with a first mounting hole 110, and the terminal post 220 sequentially passes through the first insulating member 400, the first mounting hole 110, the second insulating member 600 and is riveted to the connecting member 500. The sealing ring 300 is disposed between the outer wall of the pole column 220 and the inner wall of the first mounting hole 110, and along a first direction perpendicular to the thickness direction of the cover 100, a distance between an outermost side of the sealing ring 300 and an innermost side of the sealing ring 300 is L1, a difference between an inner diameter of the first mounting hole 110 and an outer diameter of the pole column 220 is L2, and L1> L2.

Wherein, first mounting hole 110 is including the sealed hole section 111, first spacing hole section 112 and the spacing hole section 113 of second that connect gradually, and utmost point post 220 is including the sealed shaft part 221, first spacing shaft part 222 and the spacing shaft part 223 of second that connect gradually, and sealing washer 300 includes sealing portion 310 and encloses the supporting part 320 of locating sealing portion 310 periphery. The side wall of the sealing shaft section 221 and the side wall of the sealing hole section 111 are both arranged obliquely relative to the axis of the first mounting hole 110, the sealing portion 310 is arranged between the sealing shaft section 221 and the sealing hole section 111 in a clamped manner, the supporting portion 320 is arranged between the first limiting shaft section 222 and the first limiting hole section 112 in a clamped manner, the second insulating member 600 is provided with a limiting protrusion 620, the limiting protrusion 620 is arranged between the second limiting shaft section 223 and the second limiting hole section 113 in a clamped manner, and the first insulating member 400 is provided with an accommodating groove 410 for accommodating the supporting portion 320. The sealing portion 310 and the supporting portion 320 are closed rings, the longitudinal section of the supporting portion 320 is rectangular or trapezoidal, and the sealing portion 310 and the supporting portion 320 are integrally formed.

According to some embodiments of the present disclosure, referring to fig. 3, a battery cell 22 in one embodiment includes a case 23, an electrode assembly 24 and the end cap assembly 25, the case 23 has an opening 23a, the electrode assembly 24 is disposed in the case 23 and has tabs, a cover 100 is disposed in the opening 23a, and a body 210 is disposed in the case 23 and is used for electrically connecting the tabs. According to some embodiments of the present disclosure, referring to fig. 2, in one embodiment of the battery 20, a plurality of battery cells 22 are provided, and a bus member is provided for electrically connecting the plurality of battery cells 22.

According to some embodiments of the present application, please refer to fig. 1, an embodiment of the electric device includes the battery cell 22 or the battery 20.

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, those of ordinary skill in the art will understand 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 (15)

1. An end cap assembly (25), comprising:

a cover body (100) provided with a first mounting hole (110);

the electrode terminal (200) comprises a body (210) and a pole post (220) fixed on the body (210), wherein the body (210) is positioned on one side of the cover body (100), and the pole post (220) penetrates through the first mounting hole (110); and

the sealing ring (300) is arranged between the outer wall of the pole (220) and the inner wall of the first mounting hole (110); in a first direction perpendicular to the thickness direction of the cover body (100), the distance between the outermost side edge of the sealing ring (300) and the innermost side edge of the sealing ring (300) is L1, the difference between the inner diameter of the first mounting hole (110) and the outer diameter of the pole (220) is L2, and L1> L2.

2. The end cap assembly (25) of claim 1, wherein the sealing ring (300) includes a sealing portion (310) and a supporting portion (320) surrounding the sealing portion (310), an outer diameter of the supporting portion (320) is larger than an outer diameter of the sealing portion (310), the first mounting hole (110) includes a sealing hole section (111) and a first limiting hole section (112) connected to the sealing hole section (111), and an aperture of the first limiting hole section (112) is larger than an aperture of the sealing hole section (111) to accommodate the supporting portion (320).

3. The end cap assembly (25) of claim 2, wherein the sealing portion (310) has a first outer edge (311) and a first inner edge (312), and the support portion (320) has a second outer edge (321) and a second inner edge (322); in the first direction, the second outer edge (321) exceeds the first outer edge (311), and the second inner edge (322) does not exceed the first inner edge (312).

4. The end cap assembly (25) of claim 2, wherein the sealing portion (310) and the support portion (320) are each closed-loop annular, and the central axes of the two overlap.

5. The end cap assembly (25) of claim 2, wherein the sealing portion (310) is a closed ring and the support portion (320) is a plurality of bosses annularly arranged and evenly distributed about an outer periphery of the sealing portion (310).

6. An end cap assembly (25) as claimed in claim 2, wherein the support portion (320) is rectangular or trapezoidal in longitudinal cross-section.

7. The end cap assembly (25) of claim 2, wherein the sealing portion (310) and the support portion (320) are an integral structure.

8. The end cap assembly (25) of claim 2, wherein the post (220) includes a first restraining shaft segment (222), and the support portion (320) is sandwiched between the first restraining shaft segment (222) and the first restraining bore segment (112).

9. The end cap assembly (25) of claim 8, wherein the pole (220) comprises a sealing shaft section (221) connected to the first limiting shaft section (222), and the sealing portion (310) is sandwiched between the sealing shaft section (221) and the sealing bore section (111).

10. The end cap assembly (25) of claim 9, wherein the end cap assembly (25) further comprises a first insulator (400), the first insulator (400) being disposed between the body (210) and the cover (100), the first insulator (400) being provided with a receiving groove (410) for receiving the support portion (320).

11. The end cap assembly (25) of claim 10, wherein the end cap assembly (25) further comprises a connector (500) and a second insulator (600), the connector (500) being disposed on a side of the cover (100) facing away from the body (210) and being configured to connect with a bus member to which the plurality of battery cells (22) are electrically connected; the pole (220) penetrates through the first mounting hole (110) and is riveted with the connecting piece (500), and the second insulating piece (600) is arranged between the connecting piece (500) and the cover body (100).

12. The end cap assembly (25) of claim 11, wherein the first mounting hole (110) further comprises a second limiting hole section (113) at an end of the sealing hole section (111) near the second insulator (600), the pole (220) comprises a second limiting shaft section (223) connected to the sealing shaft section (221), the second insulator (600) has a limiting protrusion (620), and the limiting protrusion (620) is disposed between the second limiting shaft section (223) and the second limiting hole section (113).

13. A battery cell (22), comprising:

a housing (23) having an opening;

an electrode assembly (24) provided in the case (23) and having tabs;

the end cap assembly (25) as set forth in any of claims 1-12, said cover (100) covering said opening, said body (210) being located within said housing (23) and being adapted to electrically connect said tabs.

14. A battery (20), comprising:

a plurality of battery cells (22) according to claim 13;

a bus member for electrically connecting the plurality of battery cells (22).

15. An electrical consumer, characterized in that it comprises a battery cell (22) according to claim 13 or a battery (20) according to claim 14.

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