CN217768552U - End cover assembly, battery monomer, battery and consumer - Google Patents

Abstract

The application provides an end cover subassembly, battery monomer, battery and consumer, the end cover subassembly includes: an end cap having a through hole; an electrode terminal at least partially located at the through-hole; a terminal plate insulated from the end cap at one side in the axial direction of the through hole, the terminal plate being connected to the electrode terminal; and the first insulating piece is arranged around the electrode terminal along the circumferential direction of the through hole, at least part of the first insulating piece is clamped between the electrode terminal and the terminal plate in the axial direction, and at least part of the first insulating piece is positioned between the electrode terminal and the end cover and is abutted with at least one of the electrode terminal and the end cover in the radial direction of the through hole. The application provides an end cover assembly's short circuit risk is low, and the security performance is good.

Description

End cover assembly, battery monomer, battery and consumer

Technical Field

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

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and electric vehicles become important components of the sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in its development.

In the existing battery technology, the end cap assembly has a short circuit risk, which affects the safety performance of the battery cell, and therefore, how to reduce the short circuit risk of the end cap assembly is one of the key points of the research in the industry.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the application provides an end cover assembly, battery monomer, battery and consumer, and end cover assembly's short circuit risk is low, and the security performance is good.

In a first aspect, the present application provides an end cap assembly comprising: an end cap having a through hole; an electrode terminal at least partially located at the through-hole; a terminal plate insulated from the end cap at one side in the axial direction of the through hole, the terminal plate being connected to the electrode terminal; and the first insulating piece is arranged around the electrode terminal along the circumferential direction of the through hole, at least part of the first insulating piece is clamped between the electrode terminal and the terminal plate in the axial direction, and at least part of the first insulating piece is positioned between the electrode terminal and the end cover and is abutted against at least one of the electrode terminal and the end cover in the radial direction of the through hole.

In the technical scheme of the embodiment of the application, the end cover assembly comprises an end cover, an electrode terminal, a terminal plate and a first insulating part, the electrode terminal is arranged in a through hole of the end cover, the terminal plate is connected with the electrode terminal, the first insulating part is arranged around the electrode terminal and at least partially clamped between the electrode terminal and the terminal plate in the axial direction of the through hole, and at least partially positioned between the electrode terminal and the end cover and abutted against at least one of the electrode terminal and the end cover in the radial direction of the through hole, so that when a metal wire is generated between the terminal plate and the electrode terminal, multi-direction separation of the metal wire to an end cover transmission path can be realized through the part clamped between the electrode terminal and the terminal plate in the axial direction and the part positioned between the electrode terminal and the end cover in the radial direction by the first insulating part, the lap joint of the metal wire and the electrode terminal and the end cover is avoided, and the short circuit risk is further reduced.

In some embodiments, the first insulating member includes a first insulating portion and a second insulating portion, an end of the first insulating portion facing away from the electrode terminal in the radial direction is connected with an end of the second insulating portion facing toward the terminal plate in the axial direction, the first insulating portion is at least partially sandwiched between the electrode terminal and the terminal plate, and the second insulating portion is at least partially located between the electrode terminal and the end cap and abuts against at least one of the electrode terminal and the end cap.

The end cover assembly provided by the embodiment of the application can prevent the metal wire on the electrode terminal or the metal wire on the end cover from extending and transmitting to each other and overlapping each other by enabling the second insulating part to be at least partially positioned between the electrode terminal and the end cover and abutting at least one of the electrode terminal and the end cover, and effectively reduces the risk of short circuit between the electrode terminal and the end cover through metal wire overlapping. And one end of the first insulating part, which is deviated from the electrode terminal in the radial direction, is connected with one end of the second insulating part, which is towards the terminal board in the axial direction, so that the molding of the first insulating part is facilitated, and the installation and the positioning of the first insulating part and the second insulating part are facilitated.

In some embodiments, the first insulating portion and the second insulating portion are an integral film layer structure.

The end cover assembly provided by the embodiment of the application can guarantee the protection effect of the first insulating part and avoid short circuit risk caused by overlapping of the metal wires between the electrode terminal and the end cover through making the first insulating part and the second insulating part have an integrated film structure. Simultaneously, still do benefit to the shaping of rete structure, reduce the shaping degree of difficulty, can also guarantee the joint strength between first insulation portion and the second insulation portion. And moreover, the film layer is adopted, so that the occupied space is small, the plasticity is realized, a certain deformation amount can be realized, and the assembly is facilitated.

In some embodiments, a first gap is formed between one end of the first insulating portion adjacent to the electrode terminal and the electrode terminal in a radial direction.

The end cover subassembly that this application embodiment provided, through making in the footpath, first insulation portion is formed with first clearance between being close to electrode terminal's one end and the electrode terminal, can enough do benefit to the assembly of first insulation portion on electrode terminal, and the setting in first clearance can be used for holding the wire that terminal block and electrode terminal produced when the assembly, avoid the wire to pierce first insulation portion, simultaneously can avoid the end cover subassembly during operation when first insulation takes place when external force such as wriggling and cause deformation down, the wire extends to the side of end cover place and migrates.

In some embodiments, an end of the terminal plate facing the first insulator in the axial direction is formed with a cutout communicating with the first gap.

The end cover assembly provided by the embodiment of the application is beneficial to the assembly between the terminal board and the electrode terminal along the axial direction by forming the notch communicated with the first gap at one end of the terminal board facing the first insulating part in the axial direction. Meanwhile, due to the arrangement of the notches, the friction contact of the terminal plate and the electrode terminal towards one end of the first insulating piece can be reduced during assembly, and the probability of wire generation during assembly of the terminal plate and the electrode terminal can be reduced.

In some embodiments, an orthographic projection of the notch is located within the first gap in the axial direction.

The end cover subassembly that this application embodiment provided is through making in the axial of through-hole, notched orthographic projection is located first clearance for terminal block and electrode terminal can all fall to first clearance in the wire that produces under the operating mode such as assembly, can radially restrict the wire through first insulation portion and extend to end cover place side, reduce short circuit probability.

In some embodiments, the cut-out is a tapered hole, and the cut-out has a larger opening toward the end of the first insulating portion than the opening away from the end of the first insulating portion in the axial direction.

The end cover assembly that this application implementation provided, through making the incision be the bell mouth to the opening of incision towards first insulation portion one end is greater than the opening of keeping away from first insulation portion one end axially. The assembly between the terminal plate and the electrode terminal is facilitated, and the metal wires generated by friction are reduced.

In some embodiments, the electrode terminal includes a main body portion and a protrusion portion at least partially protruding from the main body portion in an axial direction, the terminal plate is sleeved on the protrusion portion, a radial dimension of the main body portion is larger than a radial dimension of the protrusion portion in a radial direction, a step surface is connected between the main body portion and the protrusion portion, the first insulating portion is disposed around the protrusion portion and stacked on the step surface, and the second insulating portion is disposed around an outer circumferential surface of the main body portion and abuts against the outer circumferential surface.

The end cover assembly that this application embodiment provided, electrode terminal adopt above-mentioned structural style for first insulating part can centre gripping between main part and terminal block, and the second insulating part can surround and laminate at the outer peripheral face of main part, and effectual barrier metal silk is at the extension overlap joint between electrode terminal and end cover.

In some embodiments, the electrode terminal further includes a stopper portion disposed around the main body portion and located at a side of the main body portion facing away from the protruding portion in the axial direction, and a second gap is formed between the second insulating portion and a surface of the stopper portion facing the protruding portion in the axial direction.

The end cover assembly provided by the embodiment of the application is beneficial to connection between parts such as an end cover and the like by enabling the electrode terminal to further comprise a limiting part. Through making second insulating part and spacing portion towards forming the second between the surface of bulge with regard to the clearance, leave the machining precision allowance, avoid second insulating part length overlength to lead to first insulating part whole to have when the body to electrode terminal to interfere or lead to first insulating part assembly back unevenness to influence the separation requirement of wire.

In some embodiments, the end cap assembly further includes a seal disposed around the first insulator and extending into the through-hole, the seal being at least partially radially sandwiched between the first insulator and the end cap.

The end cover assembly provided by the embodiment of the application is through setting up the sealing member to make the sealing member encircle the setting of first insulating part and stretch into in the through-hole, can enough seal the edge of through-hole, improve end cover assembly's security performance. Simultaneously, radially, the at least partial centre gripping of sealing member is between first insulating part and end cover, when improving end cover assembly sealing performance, can also cooperate with first insulating part, realizes the separation to the wire, reduces the probability through wire overlap joint short circuit between electrode terminals and the end cover.

In some embodiments, the seal member is at least partially sandwiched between the electrode terminal and the end cap in the axial direction.

The end cover assembly provided by the embodiment of the application can ensure the sealing performance between the end cover and the electrode terminal by clamping at least part of the sealing element in the axial direction between the electrode terminal and the end cover, avoids the leakage of electrolyte and can avoid external pollutants from entering the battery.

In some embodiments, the end cap assembly further includes a second insulator disposed around the electrode terminal, the second insulator being at least partially sandwiched between the end cap and the terminal plate in the axial direction to insulate the terminal plate from the end cap.

The end cover assembly provided by the embodiment of the application is favorable for insulating the terminal board and the end cover through the second insulating part, and the safety performance of the end cover assembly is improved.

In some embodiments, the second insulating member includes a main partition axially sandwiched between the end cap and the terminal plate, and a first projection provided at an end of the main partition radially adjacent to the electrode terminal, the first projection projecting into the through hole and abutting against the sealing member.

The end cover assembly that this application embodiment provided, through making the second insulating part include main separator and first arch, can enough guarantee the insulating setting requirement between terminal board and the end cover, simultaneously first bellied setting and with the sealing member between the butt relation, through the wall with the common cladding end cover formation through-hole of sealing member, can play common guard action with first insulating part, provide dual separation on the migration path of wire, avoid electrode terminal and end cover overlap joint short circuit.

In some embodiments, the second insulating member further includes a second protrusion disposed at an end of the main partition facing away from the electrode terminal in the radial direction and extending to a side facing away from the end cap in the axial direction, the second protrusion being disposed circumferentially around the terminal plate and abutting against the terminal plate.

The end cover assembly provided by the embodiment of the application is convex through setting up the second to make the second arch encircle the terminal board setting and with the terminal board butt along circumference, can enough radially carry on spacingly to the terminal board, simultaneously, can protect the outer peripheral face of terminal board through the second arch, avoid its and end cover contact short circuit, satisfy the insulating requirement that sets up between terminal board and the end cover, improve the security performance of end cover assembly.

In a second aspect, the present application provides a battery cell comprising a housing having an opening; in the end cover assembly, the end cover assembly covers the opening and encloses with the shell to form an accommodating cavity; and the electrode assembly is arranged in the accommodating cavity and is electrically connected with the electrode terminal of the end cover assembly.

In a third aspect, the present application provides a battery including the above battery cell.

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

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

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic structural diagram of a vehicle according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a battery pack according to an embodiment of the present application;

fig. 3 is an exploded schematic view of a battery cell according to an embodiment of the present disclosure;

FIG. 4 is an isometric view of an endcap assembly provided in accordance with some embodiments of the present application;

FIG. 5 is an exploded view of an end cap assembly provided by some embodiments of the present application;

FIG. 6 is a top view of an end cap assembly provided by some embodiments of the present application;

FIG. 7 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 6;

FIG. 8 is an enlarged view of a portion of FIG. 7 at B;

FIG. 9 is a schematic view of a first insulator according to some embodiments of the present disclosure;

fig. 10 is an isometric view of an electrode terminal provided by some embodiments of the present application;

fig. 11 is a schematic structural view of a second insulating member according to some embodiments of the present application.

The reference numbers in the detailed description are as follows:

1000-a vehicle;

100-a battery; 200-a controller; 300-a motor;

10-a box body; 11-a first part; 12-a second part;

20-a battery cell; 21-a housing; 22-an electrode assembly; 23-an end cap assembly;

231-end caps; 2311-a through hole;

232-electrode terminals; 2321-a main body; 2322 — projection; 2322 a-first shaft segment; 2322b — second axis segment; 2323-a stopper;

233-terminal board; 2331-incision;

234 — first insulator; 2341 — first insulating portion; 2342 — second insulating part;

235-a seal;

236-a second insulator; 2361 main separator; 2362-a first projection; 2363-a second projection;

237-a first gap; 238-a second gap;

x-axial direction; y-radial direction.

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.

It should be noted that technical terms or scientific terms used in the embodiments of the present application should be understood as having a common meaning as understood by those skilled in the art to which the embodiments of the present application belong, unless otherwise specified.

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, merely for convenience of description and simplified description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the present application.

Furthermore, the technical terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

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 integrally formed; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. 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.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

At present, the application of power batteries is more and more extensive from the development of market conditions. 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 and electric automobiles, 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 battery is generally formed by connecting a plurality of battery cells, and an end cover assembly of the battery cells is used for leading out electric energy of the battery cells. The end cap assembly generally includes an electrode terminal, a terminal plate, and an end cap. The electrode terminal is electrically connected to a terminal plate to lead out electric power, and the cap is provided in insulation from the electrode terminal and the terminal plate to prevent electric power from leaking from the cap.

The inventor notices that the short circuit risk often occurs in the use process of the battery cell, and the safety performance of the battery cell and the battery applied by the battery cell is influenced. The inventor further researches and discovers that part of metal wires can be generated due to relative friction during the connection process of the electrode terminal and the terminal plate of the end cover assembly. During the installation process, the metal wires extend along the gaps and are overlapped with the end covers, so that short-circuit connection between the electrode terminals and the end covers is formed, and the safety accidents of the battery cells are caused.

In order to alleviate the problem of short circuit of a battery cell, the applicant researches and discovers that the end cover assembly of the battery cell can be improved, the probability of short circuit between an electrode terminal and an end cover through overlapping of metal wires is reduced by blocking the transmission path of the metal wires, and the safety performance of the end cover assembly is improved.

Based on the above consideration, the inventors have conducted intensive studies to design a new end cap assembly, which includes: an end cap having a through hole; an electrode terminal at least partially located at the through-hole; a terminal plate insulated from the end cap at one side of the through hole in the axial direction, the terminal plate being connected to the electrode terminal; and the first insulating piece is arranged around the electrode terminal along the circumferential direction of the through hole, at least part of the first insulating piece is clamped between the electrode terminal and the terminal plate in the axial direction, and at least part of the first insulating piece is positioned between the electrode terminal and the end cover and is abutted with at least one of the electrode terminal and the end cover in the radial direction of the through hole.

In the end cover assembly, the first insulating piece is arranged around the electrode terminal, and at least part of the first insulating piece is clamped between the electrode terminal and the terminal board in the axial direction of the through hole, and at least part of the first insulating piece is positioned between the electrode terminal and the end cover and abutted against at least one of the electrode terminal and the end cover in the radial direction of the through hole, so that when a metal wire is generated between the terminal board and the electrode terminal, the transmission path of the metal wire to the end cover can be blocked by the part of the first insulating piece clamped between the electrode terminal and the terminal board in the axial direction and the part of the first insulating piece positioned between the electrode terminal and the end cover in the radial direction, the metal wire is prevented from being overlapped with the electrode terminal and the end cover, and the short-circuit risk is reduced

The technical scheme described in the embodiment of the application is suitable for the battery cell, the battery and the electric equipment using the battery.

The electric equipment can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. The vehicle can be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; electric toys include stationary or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric airplane toys, and the like; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and electric tools for railways, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, electric impact drills, concrete vibrators, and electric planers. The embodiment of the present application does not specifically limit the above-mentioned electric devices.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to be applied to the battery cell, the battery and the electric device using the battery described above, but may also be applied to all batteries including the end cap assembly, batteries and electric devices using the battery, but for brevity of description, the following embodiments are described by taking an electric vehicle as an example.

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, and 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 be used not only as an operating power source of the vehicle 1000, but also 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.

Referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present disclosure. The battery 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The battery box is characterized in that the box body 10 is used for providing a containing space for the battery cells 20, and the box body 10 can adopt various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 cover each other, and the first portion 11 and the second portion 12 together define a receiving space 13 for receiving the battery cell 20. The second part 12 may be a hollow structure with one open end, the first part 11 may be a plate-shaped structure, and the first part 11 covers the open side of the second part 12, such that the first part 11 and the second part 12 together define the accommodating space 13. The first portion 11 and the second portion 12 may be both hollow structures with one side open, and the open side of the first portion 11 may cover the open side of the second portion 12. Of course, the box 10 formed by the first and second portions 11 and 12 may have various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 100, the number of the battery cells may be multiple, and the multiple battery cells 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 multiple battery cells. The plurality of battery cells may be directly connected in series or in parallel or in series-parallel, and the whole body formed by the plurality of battery cells is accommodated in the case 10. Of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 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 accommodated in the case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for achieving electrical connection between the plurality of battery cells.

Each battery cell 20 may be a secondary battery or a primary battery, and may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular parallelepiped, or other shapes.

Referring to fig. 3, fig. 3 is an exploded structural schematic diagram of a battery cell 20 according to some embodiments of the present disclosure. The battery cell 20 refers to the smallest unit constituting the battery. Battery cell 20 includes a housing 21, an electrode assembly 22, and an end cap assembly 23.

The case 21 is an assembly for mating with the end cap assembly 23 to form an internal environment of the battery cell 20, wherein the formed internal environment may be used to house the electrode assembly 22, electrolyte, and other components. The housing 21 and the end cap assembly 23 may be separate components, and an opening may be provided in the housing 21, and the end cap assembly 23 may cover the opening at the opening to form the internal environment of the battery cell 20. Without limitation, the end cap assembly 23 and the housing 21 may be integrated, and specifically, the end cap assembly 23 and the housing 21 may form a common connecting surface before other components are inserted into the housing, and when it is required to enclose the inside of the housing 21, the end cap assembly 23 covers the housing 21. The housing 21 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 case 21 may be determined according to the specific shape and size of the electrode assembly 22. The material of the housing 21 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 22 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 22 may be contained within the case 21. The electrode assembly 22 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally disposed between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode tabs having the active material constitute the body portion of the electrode assembly 22, and the portions of the positive and negative electrode tabs having no active material each constitute a tab 221. 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. During the charge and discharge of the battery, the positive and negative active materials react with the electrolyte, and the tab 221 is connected to the electrode terminal to form a current loop.

The end cap assembly 23 is a component that covers the opening of the case 21 and encloses with the case 21 to form a receiving cavity for receiving the electrode assembly 22, and the end cap assembly 23 isolates the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap assembly 23 may be adapted to the shape of the housing 21 to fit the housing 21. Alternatively, the end cap assembly 23 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the end cap assembly 23 is not easily deformed when being extruded and collided, and thus the battery cell 20 may have a higher structural strength and the safety performance may be improved.

Referring to fig. 4 to 8, fig. 4 is an isometric view of an end cap assembly provided in some embodiments of the present application, fig. 5 is an exploded view of an end cap assembly provided in some embodiments of the present application, fig. 6 isbase:Sub>A top view of an end cap assembly provided in some embodiments of the present application, fig. 7 isbase:Sub>A sectional view taken alongbase:Sub>A-base:Sub>A direction in fig. 6, and fig. 8 isbase:Sub>A partially enlarged view taken at B in fig. 7.

The end cap assembly 23 provided by the embodiment of the application comprises an end cap 231, an electrode terminal 232, a terminal plate 233 and a first insulating member 234, wherein the end cap 231 is provided with a through hole 2311, the electrode terminal 232 is at least partially located in the through hole 2311, the terminal plate 233 is arranged on one side of the end cap 231 in the axial direction X of the through hole 2311 in an insulating mode, and the terminal plate 233 is connected to the electrode terminal 232. The first insulator 234 is provided around the electrode terminal 232 in the circumferential direction of the through hole 2311, the first insulator 234 is at least partially sandwiched between the electrode terminal 232 and the terminal plate 233 in the axial direction X, and the first insulator 234 is at least partially positioned between the electrode terminal 232 and the end cap 231 and abuts at least one of the electrode terminal 232 and the end cap 231 in the radial direction Y of the through hole 2311.

Alternatively, the end cap 231 is a member that covers the opening of the case 21 to isolate the internal environment of the battery cell 20 from the external environment. The end cap 231 defines a sealed space for accommodating the electrode assembly 22, the electrolyte, and other components together with the case 21.

Alternatively, the shape of the end cap 231 may be adapted to the shape of the housing 21, for example, the housing 21 is a rectangular parallelepiped structure, the end cap 231 is a rectangular plate structure adapted to the housing 21, and for example, the housing 21 is a cylinder structure, and the end cap 231 is a circular plate structure adapted to the housing 21. The material of the end cap 231 may be various, such as copper, iron, aluminum, steel, aluminum alloy, etc., and the material of the end cap 231 may be the same as or different from that of the housing.

Alternatively, the electrode terminal 232 is used to electrically connect with the electrode assembly 22 to output the electric power of the battery cell 20. The electrode terminals 232 may include a positive electrode terminal for electrical connection with a positive tab and a negative electrode terminal for electrical connection with a negative tab. The positive electrode terminal and the positive electrode lug can be directly connected or indirectly connected, and the negative electrode terminal and the negative electrode lug can be directly connected or indirectly connected.

Alternatively, an insulating structure may be provided between the terminal plate 233 and the end cover 231 so that the terminal plate 233 and the end cover 231 are insulated from each other.

Optionally, a terminal plate 233 is connected to each electrode terminal 232.

Alternatively, a mounting hole may be provided on the terminal plate 233, and the terminal plate 233 may be fitted to the electrode terminal 232 through the mounting hole and connected to the electrode terminal 232.

Alternatively, a first insulating member 234 may be provided corresponding to each electrode terminal 232, the first insulating member 234 being disposed around the corresponding electrode terminal 232 in the circumferential direction of the through hole 2311.

Alternatively, in the axial direction X of the through hole 2311, the terminal plate 233 is at least partially spaced apart from the electrode terminal 232 and forms a first clamping space, and the first insulating member 234 is at least partially located in the first clamping space and clamped between the terminal plate 233 and the electrode terminal 232. In the radial direction Y of the through hole 2311, the electrode terminal 232 is at least partially spaced apart from the cap 231 and forms a second clamping space in which the first insulator 234 is at least partially located.

Alternatively, the portion of the first insulator 234 between the electrode terminal 232 and the cap 231 may abut against the electrode terminal 232, the cap 231, or both the electrode terminal 232 and the cap 231 in the radial direction Y.

Alternatively, a portion of the first insulator 234 sandwiched between the electrode terminal 232 and the terminal plate 233 and a portion of the first insulator 234 between the electrode terminal 232 and the cap 231 may be connected to each other, or may be provided separately.

In the end cap assembly 23 provided by the embodiment of the application, since the first insulating member 234 is disposed around the electrode terminal 232, and in the axial direction X of the through hole 2311, the first insulating member 234 is at least partially clamped between the electrode terminal 232 and the terminal plate 233, and in the radial direction Y of the through hole 2311, the first insulating member 234 is at least partially positioned between the electrode terminal 232 and the end cap 231 and abuts against at least one of the electrode terminal 232 and the end cap 231, so that when a wire is generated between the terminal plate 233 and the electrode terminal 232, a multi-directional blocking of a transmission path from the wire to the end cap 231 can be realized through a portion of the first insulating member 234 clamped between the electrode terminal 232 and the terminal plate 233 in the axial direction X and a portion of the first insulating member 234 between the electrode terminal 232 and the end cap 231 in the radial direction Y, and the overlapping of the wire with the electrode terminal 232 and the end cap 231 is avoided, thereby reducing a short circuit risk.

Referring to fig. 8 and 9, fig. 9 is a schematic structural diagram of a first insulating member 234 according to some embodiments of the present disclosure.

As some optional embodiments, in the end cap assembly 23 provided in this embodiment of the present application, the first insulating member 234 includes a first insulating portion 2341 and a second insulating portion 2342, an end of the first insulating portion 2341 facing away from the electrode terminal 232 in the radial direction Y is connected to an end of the second insulating portion 2342 facing toward the terminal plate 233 in the axial direction X, the first insulating portion 2341 is at least partially sandwiched between the electrode terminal 232 and the terminal plate 233, and the second insulating portion 2342 is at least partially sandwiched between the electrode terminal 232 and the end cap 231 and abuts against at least one of the electrode terminal 232 and the end cap 231.

Alternatively, the first insulating portion 2341 and the second insulating portion 2342 may be both annular structures and provided around the electrode terminal 232.

Alternatively, the first insulating portion 2341 and the second insulating portion 2342 may be distributed along the axial direction X of the through hole 2311.

Alternatively, the first insulating portion 2341 and the second insulating portion 2342 may be integrally formed, or may be formed by separate molding and then integrally connected by bonding or the like.

The end cap assembly 23 provided by the embodiment of the application, by making the first insulating member 234 include the first insulating portion 2341 and the second insulating portion 2342, and making the first insulating portion 2341 at least partially clamped between the electrode terminal 232 and the terminal plate 233, the wire can be blocked by the first insulating portion 2341 in the radial direction Y from extending and transmitting to the end cap 231. By positioning the second insulating portion 2342 at least partially between the electrode terminal 232 and the end cap 231 and abutting at least one of the electrode terminal 232 and the end cap 231, the wires on the electrode terminal 232 or the end cap 231 can be prevented from extending and overlapping each other, and the risk of short circuit between the electrode terminal 232 and the end cap 231 due to overlapping of the wires can be effectively reduced. Further, by connecting the end of the first insulating portion 2341 facing away from the electrode terminal 232 in the radial direction Y with the end of the second insulating portion 2342 facing toward the terminal plate 233 in the axial direction X, molding of the first insulating member 234 is facilitated, and mounting positioning of the first insulating portion 2341 and the second insulating portion 2342 is facilitated.

As some optional embodiments, the first insulating portion 2341 and the second insulating portion 2342 are a single-piece film structure.

Alternatively, the materials of the first insulating portion 2341 and the second insulating portion 2342 may be the same, which facilitates integral molding.

Alternatively, the first insulating portion 2341 and the second insulating portion 2342 may be made of polypropylene or a material including polypropylene.

Optionally, the film thicknesses of the first insulating portion 2341 and the second insulating portion 2342 may be the same, and may also be different, and may be the same, which is beneficial for molding.

Alternatively, the first insulating portion 2341 and the second insulating portion 2342 may be integrally molded by injection molding or the like.

The end cover assembly 23 that this application embodiment provided, through making first insulating part 2341 and second insulating part 2342 formula membranous layer structure as an organic whole, can enough guarantee the safeguard effect of first insulating part 234, avoid between electrode terminal 232 and the end cover 231 the overlap joint of wire to cause the short circuit risk. Simultaneously, still do benefit to the shaping of rete structure, reduce the shaping degree of difficulty, can also guarantee the joint strength between first insulating part 2341 and second insulating part 2342. And moreover, the film layer is adopted, so that the occupied space is small, the plasticity is realized, a certain deformation amount can be realized, and the assembly is facilitated.

As some optional embodiments, a first gap 237 is formed between one end of the first insulating portion 2341 near the electrode terminal 232 and the electrode terminal 232 in the radial direction Y.

Alternatively, in the radial direction Y of the through hole 2311, the first insulating portion 2341 is disposed at an interval between the end facing the electrode terminal 232 and the electrode terminal 232, forming the first gap 237, and the formed first gap 237 may be an annular gap.

The end cap assembly 23 provided by the embodiment of the application, by making the first gap 237 formed between the end of the first insulating portion 2341 close to the electrode terminal 232 and the electrode terminal 232 in the radial direction Y, the assembly of the first insulating portion 2341 on the electrode terminal 232 can be facilitated, and the arrangement of the first gap 237 can be used for accommodating the wire generated when the terminal plate 233 and the electrode terminal 232 are assembled, so that the wire is prevented from puncturing the first insulating portion 2341, and meanwhile, when the deformation is caused under the external force such as creeping of the first insulating member 234 when the end cap assembly 23 works, the wire extends and migrates to the side where the end cap 231 is located.

In some alternative embodiments, the end cap assembly 23 provided by the embodiment of the present application is formed with a cut 2331 communicating with the first gap 237 at an end of the terminal plate 233 facing the first insulator 234 in the axial direction X.

Alternatively, the cutout 2331 may be provided to extend from the face of the terminal plate 233, which is mated with the electrode terminal 232 in the radial direction Y, toward the side of the first insulator 234.

Alternatively, the notch 2331 may extend from the wall surface of the terminal plate 233 surrounding the mounting hole to the side of the first insulator 234.

Alternatively, the cut-outs 2331 may be ring-shaped and disposed around the electrode terminals 232.

The end cap assembly 23 provided in the embodiment of the present application facilitates the assembly between the terminal plate 233 and the electrode terminal 232 along the axial direction X by forming the cut 2331 communicating with the first gap 237 at the end of the terminal plate 233 facing the first insulator 234 in the axial direction X. Meanwhile, the provision of the cut 2331 enables the terminal plate 233 and the electrode terminal 232 to be fitted with reduced frictional contact toward one end of the first insulator 234, thereby reducing the probability of wire generation when the two are fitted.

In some alternative embodiments, in the axial direction X, an orthographic projection of the cut-out 2331 is located within the first gap 237.

Alternatively, the orthographic projection of the notch 2331 may be understood as the orthographic projection in the axial direction X of the wall surface enclosing the notch 2331.

Alternatively, the radial dimension of the cutout 2331 in the radial direction Y away from the end of the electrode terminal 232 is smaller than the radial dimension of the first insulating portion 2341 toward the end of the electrode terminal 232.

The end cover assembly 23 provided by the embodiment of the application is arranged in the first gap 237 by enabling the orthographic projection of the cut 2331 to be located in the axial direction X of the through hole 2311, so that the wires generated by the terminal plate 233 and the electrode terminal 232 under the working conditions of assembly and the like can be completely dropped into the first gap 237, the wires can be limited to extend to the side of the end cover 231 on the radial direction Y through the first insulating part 2341, and the short-circuit probability is reduced.

In some alternative embodiments, the cut 2331 may be a tapered hole, and the cut 2331 has a larger opening toward the end of the first insulating portion 2341 than the opening away from the end of the first insulating portion 2341 in the axial direction X of the through hole 2311.

Alternatively, the cut-outs 2331 may be tapered holes disposed around the electrode terminals 232.

Alternatively, the cutout 2331 may be coaxially disposed with the first through hole 2311.

Optionally, the cut-out 2331 has a large-mouth end in the axial direction X and a small-mouth end disposed away from the first insulating portion 2341 in the axial direction X and clearance-fitted with the electrode terminal 232 in the radial direction Y of the through-hole 2311. The large opening end is disposed toward the first insulating portion 2341 in the axial direction X and is formed with a space between the electrode terminal 232 and the radial direction Y of the through hole 2311. The interval between the large opening end and the electrode terminal 231 is smaller than the interval between the first insulating portion 2341 toward the end of the electrode terminal 232 and the electrode terminal 232.

The end cap assembly 23 provided in the embodiment of the present application is formed by making the cut 2331 a tapered hole, and the opening of the cut 2331 towards the end of the first insulating portion 2341 is larger than the opening of the cut 2331 away from the end of the first insulating portion 2341 in the axial direction X. The assembly between the terminal plate 233 and the electrode terminal 232 is facilitated, and the wire generated due to friction is reduced.

Referring to fig. 8 to 10, fig. 10 is an isometric view of an electrode terminal 232 according to some embodiments of the present application.

As some optional embodiments, in the end cap assembly 23 provided in this embodiment of the present application, the electrode terminal 232 includes a main body portion 2321 and a protruding portion 2322 that at least partially protrudes from the main body portion 2321 in the axial direction X, the terminal plate 233 is sleeved on the protruding portion 2322, in the radial direction Y, a radial dimension of the main body portion 2321 is greater than a radial dimension of the protruding portion 2322, a step surface 2324 is connected between the main body portion 2321 and the protruding portion 2322, the first insulating portion 2341 is disposed around the protruding portion 2322 and stacked on the step surface 2324, and the second insulating portion 2342 is disposed around an outer circumferential surface of the main body portion 2321 and abuts against the outer circumferential surface.

Alternatively, the main body 2321 and the protruding part 2322 may be both cylindrical structures, and may be prismatic or cylindrical, and may be cylindrical.

Alternatively, in the axial direction X, the main body portion 2321 may have an equal cross-sectional structure, the protruding portion 2322 may have a variable cross-sectional structure, and optionally, a cross-sectional dimension of the protruding portion 2322 in the axial direction X may vary from segment to segment.

Optionally, the protruding portion 2322 may include a first shaft segment 2322a and a second shaft segment 2322b, the first shaft segment 2322a is connected between the main body portion 2321 and the second shaft segment 2322b, a radial dimension of the first shaft segment 2322a is smaller than a radial dimension of the second shaft segment 2322b, and a radial dimension of the second shaft segment 2322b is smaller than a radial dimension of the main body portion 2321. The stepped surface 2324 is connected between the first shaft segment 2322a and the main body portion 2321.

Optionally, the main body portion 2321 and the protruding portion 2322 may both be at least partially located within the through hole 2311.

Alternatively, the terminal plate 233 is fitted over the projection 2322 through the mounting hole and is clearance-fitted with the projection 2322.

In the end cap assembly 23 provided by the embodiment of the application, the electrode terminal 232 adopts the above structure, so that the first insulating part 2341 can be clamped between the main body part 2321 and the terminal plate 233, and the second insulating part 2342 can surround and attach to the outer peripheral surface of the main body part 2321, thereby effectively blocking the extending and overlapping of the metal wire between the electrode terminal 232 and the end cap 231.

As some optional embodiments, in the end cap assembly 23 provided in this embodiment of the application, the electrode terminal 232 further includes the limiting part 2323, the limiting part 2323 is disposed around the main body part 2321 and is located on a side of the main body part 2321 facing away from the protruding part 2322 in the axial direction X, and in the axial direction X, a second gap 238 is formed between the second insulating part 2342 and a surface of the limiting part 2323 facing the protruding part 2322.

Optionally, the limiting part 2323 may be disposed around the outer circumference of the main body part 2321, and the radial dimension of the limiting part 2323 is greater than the radial dimension of the main body part 2321.

Optionally, the specific value of the second gap 238 between the second insulating portion 2342 and the surface of the limiting portion 2323 facing the protruding portion 2322 may be set according to insulation requirements, and in an alternative example, the projection in the radial direction Y of the through hole 2311 may cover the end cover 231 to enclose the side wall of the through hole 2311.

The end cap assembly 23 provided by the embodiment of the present application is favorable for connection with components such as the end cap 231 by making the electrode terminal 232 further include the limiting portion 2323. By forming the second gap 238 between the second insulating portion 2342 and the surface of the limiting portion 2323 facing the protruding portion 2322, a margin is left, so that interference of the first insulating member 234 when the first insulating member 234 is integrally assembled to the electrode terminal 232 due to the fact that the second insulating portion 2342 is too long or blocking requirements of the wire due to unevenness of the first insulating portion 2341 after the first insulating portion 2341 is assembled are avoided.

In an alternative embodiment, the end cap assembly 23 provided in the embodiment of the present application further includes a sealing member 235, the sealing member 235 is disposed around the first insulating member 234 and extends into the through hole 2311, and the sealing member 235 is at least partially clamped between the first insulating member 234 and the end cap 231 in the radial direction Y.

Optionally, a sealing member 235 may be disposed between each electrode terminal 232 and the end cap 231.

Alternatively, the seal 235 may extend partially into the bore 2311, or may extend entirely into the bore 2311.

According to the end cover assembly 23 provided by the embodiment of the application, the sealing member 235 is arranged to surround the first insulating member 234 and extend into the through hole 2311, so that the edge of the through hole 2311 can be sealed, and the safety performance of the end cover assembly 23 is improved. Meanwhile, in the radial direction Y, the sealing element 235 is at least partially clamped between the first insulating element 234 and the end cover 231, so that the sealing performance of the end cover assembly 23 is improved, and meanwhile, the sealing element can be matched with the first insulating element 234, the metal wire is blocked, and the probability of short circuit between the electrode terminal 232 and the end cover 231 through metal wire lapping is reduced.

As an alternative embodiment, the end cap assembly 23 provided in the embodiment of the present application at least partially clamps the sealing member 235 between the electrode terminal 232 and the end cap 231 in the axial direction X.

Alternatively, when the electrode terminal 232 includes the stopper 2323, the sealing member 235 may be caused to abut against the stopper 2323 in the axial direction X and be at least partially sandwiched between the stopper 2323 and the end cap 231.

The end cover assembly 23 that this application embodiment provided, through make at least partial centre gripping of sealing member 235 between electrode terminal 232 and end cover 231 on axial X, can guarantee the sealing performance between end cover 231 and the electrode terminal 232, avoid electrolyte to leak, can avoid outside pollutant to get into inside the battery simultaneously.

Referring to fig. 8 to 11, fig. 11 is a schematic structural diagram of a second insulating member 236 according to some embodiments of the present disclosure.

As an alternative embodiment, the end cap assembly 23 provided in this embodiment of the present application further includes a second insulating member 236, the second insulating member 236 is disposed around the electrode terminal 232, and the second insulating member 236 is at least partially clamped between the end cap 231 and the terminal plate 233 in the axial direction X, so that the terminal plate 233 is disposed in an insulating manner from the end cap 231.

Alternatively, the second insulator 236 may be stacked with the terminal plate 233 and the end cap 231 in the axial direction X.

Alternatively, a relief hole may be provided on the second insulating member 236, and the electrode terminal 232 may pass through the relief hole such that the second insulating member 236 is disposed around the electrode terminal 232.

Alternatively, the surface of the end cap 231 facing the terminal plate 233 in the axial direction X may be provided with a recess, and the second insulator 236 and the terminal plate 233 may be at least partially sunk into the recess to reduce the height of the end cap assembly 23 in the axial direction X.

The end cover assembly 23 that this application embodiment provided, through setting up second insulator 236, do benefit to and make the terminal block 233 and the insulating setting between the end cover 231, improve the security performance of end cover assembly 23.

As an alternative embodiment, in the end cap assembly 23 provided in this embodiment of the present application, the second insulating member 236 includes a main partition 2361 and a first protrusion 2362, the main partition 2361 is clamped between the end cap 231 and the terminal plate 233 in the axial direction X, the first protrusion 2362 is disposed at one end of the main partition 2361 close to the electrode terminal 232 in the radial direction Y, and the first protrusion 2362 extends into the through hole 2311 and abuts against the sealing member 235.

Alternatively, the first protrusion 2362 may be an annular structure body, and the first protrusion 2362 may be provided at a distance from the first insulating member 234 in the radial direction Y, or may abut against the first insulating member 234.

Optionally, first protrusion 2362 may be coaxially disposed with seal 235.

According to the end cap assembly 23 provided by the embodiment of the application, by enabling the second insulating member 236 to include the main partition 2361 and the first protrusion 2362, it is possible to ensure that the insulating setting requirement between the terminal plate 233 and the end cap 231 is met, and at the same time, the setting of the first protrusion 2362 and the abutting relation between the first protrusion 2362 and the sealing member 235, by covering the wall surface of the through hole 2311 formed by the end cap 231 together with the sealing member 235, it is possible to play a role of common protection with the first insulating member 234, provide double barriers on the migration path of the wire, and avoid the electrode terminal 232 and the end cap 231 from being overlapped and short-circuited.

As an alternative embodiment, in the end cap assembly 23 provided in this embodiment, the second insulating member 236 further includes a second protrusion 2363, the second protrusion 2363 is disposed at one end of the main partition 2361 facing away from the electrode terminal 232 in the radial direction Y and extends to a side far away from the end cap 231 in the axial direction X, and the second protrusion 2363 is disposed circumferentially around the terminal plate 233 and abuts against the terminal plate 233.

Alternatively, second protrusion 2363 may be a ring-shaped structure.

Optionally, second protrusion 2363 extends in a direction opposite to the direction in which first protrusion 2362 extends.

Alternatively, second protrusion 2363 may be coaxially disposed with first protrusion 2362.

The end cover assembly 23 that this application embodiment provided, through making second insulator 236 still include the protruding 2363 of second, and make the protruding 2363 of second set up and with terminal board 233 butt around terminal board 233 along circumference, can enough carry on spacingly to terminal board 233 on radial Y, simultaneously, can protect the outer peripheral face of terminal board 233 through the protruding 2363 of second, avoid it and end cover 231 contact short circuit, satisfy the insulating requirement that sets up between terminal board 233 and the end cover 231, improve end cover assembly 23's security performance.

To better understand the terminal assembly 23 provided by the present embodiment, a specific example of the end cap assembly 23 provided by the present embodiment will be described below. Illustratively, the terminal assembly 23 may include an end cap 231, an electrode terminal 232, a terminal plate 233, and a first insulator 234, the end cap 231 having a through hole 2311, the electrode terminal 232 being at least partially located in the through hole 2311, the terminal plate 233 being insulatedly disposed at one side of the end cap 231 in the axial direction X of the through hole 2311, the terminal plate 233 being connected to the electrode terminal 232. The first insulating member 234 is disposed around the electrode terminal 232 in the circumferential direction of the through hole 2311, and the first insulating member 234 includes a first insulating portion 2341 and a second insulating portion 2342, and the first insulating portion 2341 and the second insulating portion 2342 are integrated film layer structures. The first insulating portion 2341 is at least partially sandwiched between the electrode terminal 232 and the terminal plate 233, a first gap 237 is formed between one end of the first insulating portion 2341 close to the electrode terminal 232 and the electrode terminal 232 in the radial direction Y, a cutout 2331 communicating with the first gap 237 is formed in one end of the terminal plate 233 facing the first insulating member 234 in the axial direction X, and an orthogonal projection of the cutout 2331 is located in the first gap 237. The electrode terminal 232 includes a main body 2321 and a protruding part 2322 at least partially protruding from the main body 2321 in the axial direction X, the terminal plate 233 is coupled to the protruding part 2322, the radial dimension of the main body 2321 is greater than the radial dimension of the protruding part 2322 in the radial direction Y, a step surface is connected between the main body 2321 and the protruding part 2322, a first insulating part 2341 is disposed around the protruding part 2322 and stacked on the step surface, and a second insulating part 2342 is disposed around the outer circumferential surface of the main body 2321 and abuts against the outer circumferential surface.

According to some embodiments of the present application, there is also provided a battery cell including the end cap assembly 23 of any of the above aspects.

According to some embodiments of the present application, there is also provided a battery including the battery cell according to any one of the above aspects.

According to some embodiments of the present application, there is also provided an electric device, including the battery according to any of the above aspects, and the battery is used for providing electric energy for the electric device.

The powered device may be any of the aforementioned devices or systems that employ a battery.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit 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 rather to cover all embodiments falling within the scope of the appended claims.

Claims (17)

1. An end cap assembly, comprising:

an end cap having a through hole;

an electrode terminal at least partially located at the through-hole;

a terminal plate that is provided in an insulated manner on one side of the end cap in an axial direction of the through hole, the terminal plate being connected to the electrode terminal;

and a first insulating member that is provided around the electrode terminal in a circumferential direction of the through hole, is at least partially sandwiched between the electrode terminal and the terminal plate in the axial direction, and is at least partially located between the electrode terminal and the end cap and abuts against at least one of the electrode terminal and the end cap in a radial direction of the through hole.

2. The end cap assembly of claim 1, wherein the first insulating member includes a first insulating portion and a second insulating portion, an end of the first insulating portion facing away from the electrode terminal in the radial direction and an end of the second insulating portion facing toward the terminal plate in the axial direction are connected, the first insulating portion is at least partially sandwiched between the electrode terminal and the terminal plate, and the second insulating portion is at least partially between the electrode terminal and the end cap and abuts at least one of the electrode terminal and the end cap.

3. The end cap assembly of claim 2, wherein the first insulating portion and the second insulating portion are a unitary film layer structure.

4. The end cap assembly of claim 2, wherein a first gap is formed between an end of the first insulating portion adjacent to the electrode terminal and the electrode terminal in the radial direction.

5. An end cap assembly according to claim 4, wherein an end of the terminal plate facing the first insulator in the axial direction is formed with a cutout that communicates with the first gap.

6. The end cap assembly of claim 5, wherein an orthographic projection of the notch in the axial direction is located within the first gap.

7. The end cap assembly of claim 5, wherein the cutout is a tapered bore, the cutout opening toward the first insulating portion end being larger than the opening away from the first insulating portion end in the axial direction.

8. The end cap assembly according to claim 2, wherein the electrode terminal includes a main body portion and a projection portion provided to project from the main body portion in the axial direction, the terminal plate is fitted over the projection portion, a radial dimension of the main body portion is larger than a radial dimension of the projection portion in the radial direction, a step surface is connected between the main body portion and the projection portion, the first insulating portion is provided around the projection portion and is stacked on the step surface, and the second insulating portion is provided around an outer peripheral surface of the main body portion and abuts against the outer peripheral surface.

9. The end cap assembly of claim 8, wherein the electrode terminal further comprises a stopper portion disposed around the main body portion and located on a side of the main body portion facing away from the protruding portion in the axial direction, and a second gap is formed between the second insulating portion and a surface of the stopper portion facing the protruding portion in the axial direction.

10. The end cap assembly of any of claims 1-9, further comprising a seal member disposed around the first insulator member and extending into the through-hole, the seal member being at least partially sandwiched between the first insulator member and the end cap in the radial direction.

11. The end cap assembly of claim 10, wherein the seal member is at least partially sandwiched between the electrode terminal and the end cap in the axial direction.

12. The end cap assembly of claim 10, further comprising a second insulator disposed around the electrode terminal, the second insulator at least partially sandwiched between the end cap and a terminal plate in the axial direction to insulate the terminal plate from the end cap.

13. The end cap assembly according to claim 12, wherein the second insulating member includes a main partition sandwiched between the end cap and the terminal plate in the axial direction, and a first projection provided at an end of the main partition adjacent to the electrode terminal in the radial direction, the first projection projecting into the through hole and abutting against the sealing member.

14. The end cap assembly according to claim 13, wherein the second insulator further includes a second protrusion provided at an end of the main separator facing away from the electrode terminal in the radial direction and extending to a side facing away from the end cap in the axial direction, the second protrusion being provided around and abutting against the terminal plate in the circumferential direction.

15. A battery cell comprising

A housing having an opening;

the end cap assembly of any one of claims 1 to 14, covering the opening and enclosing the housing to form a receiving cavity;

and the electrode assembly is arranged in the accommodating cavity and is electrically connected with the electrode terminal of the end cover assembly.

16. A battery comprising the cell of claim 15.

17. An electrical consumer, characterized in that the consumer comprises a battery according to claim 16 for providing electrical energy.

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