CN218385672U - End cover assembly, battery monomer, battery and consumer - Google Patents

Abstract

The utility model relates to an end cover component, a single battery, a battery and electric equipment, the end cover component comprises a cover body and an electrode terminal, the electrode terminal is arranged on the cover body and is used for electrically connecting the electrode component of the single battery; the electrode terminal comprises a body and a pole fixed on the body, the body is positioned on one side of the cover body, and the pole penetrates through the cover body; the electrode assembly comprises a first pole piece and a second pole piece, the body is provided with a fusing part, and the fusing part is configured to be used for blocking the electric connection between the first pole piece and the pole. 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 a cover body covers the opening. 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. An electric device comprises the battery. The end cover assembly, the single battery, the battery and the electric equipment are high in use safety and high in structural stability.

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 promotion of new energy automobiles, the charge and discharge performance, the cruising ability and the like of the new energy automobiles increasingly attract attention and attention of people. 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.

Currently, the electrode terminals and the tabs are generally connected through an adaptor, and the fusing part of the battery cell is perforated on the adaptor, so that the cross-sectional area of the adaptor is reduced to form a fusing structure. Because the adaptor is generally softer thinner, trompil on the adaptor can reduce the structural strength of adaptor, easily leads to the torn risk of adaptor under the relatively poor environment of operating mode, and structural reliability is lower.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an end cap assembly, a battery cell, a battery and an electric device, which solve the problem of low structural reliability of the battery cell.

An end cover assembly is used in a single battery and comprises a cover body and an electrode terminal, wherein the electrode terminal is arranged on the cover body and is used for electrically connecting an electrode assembly of the single battery; the electrode terminal comprises a body and a pole fixed on the body, the body is positioned on one side of the cover body, and the pole penetrates through the cover body; the electrode assembly comprises a first pole piece and a second pole piece, the body is provided with a fusing part, and the fusing part is configured to be used for blocking the electric connection between the first pole piece and the pole. In the end cap assembly, the electrode terminal is provided with the fusing part, so that the end cap assembly has a fusing protection function and high structural reliability; the fusing part is arranged on the body of the electrode terminal and is positioned on the inner side of the battery monomer, the stress applied to the fusing part when the bus component is connected with the electrode terminal can be reduced, and the structural stability is high.

In some embodiments, the body includes a first connecting portion and a second connecting portion, the second connecting portion is used for electrically connecting tabs of the electrode assembly, the tab is fixed to the first connecting portion, and the fusing portion is disposed between the first connecting portion and the second connecting portion. In this way, the fusing part can be provided on the body of the electron electrode terminal without interfering with the connection between the electrode terminal and the tab of the electrode assembly.

In some embodiments, the body has a first edge and a second edge along a first direction, a minimum distance between the second edge and the pole is smaller than a minimum distance between the pole and the first edge, and the first direction is an arrangement direction of the first connection portion and the second connection portion. So, utmost point post deviation is close to the second edge setting, also makes utmost point post biasing to set up fusing portion and welding utmost point ear on the body.

In some of these embodiments, the fuse has a smaller cross-sectional area than other portions of the body. Therefore, on the basis of not influencing the fusing protection function of the fusing part, the overcurrent area of the fusing part is reduced, and the fusing part can be fused in time when the current exceeds the overcurrent limit.

In some embodiments, the fuse portion has a recess groove, and the recess groove is opened at a side of the fuse portion along a second direction, which is perpendicular to the first direction. So, when the battery monomer takes place outer short circuit, the electric connection between the first pole piece of electrode subassembly and the utmost point post of end cover subassembly fuses from the depressed groove, and the battery monomer is inside to be broken circuit, realizes fusing protect function.

In some embodiments, the fusing part is provided with a through groove which penetrates through the body along the thickness direction of the cover body. So, when the battery monomer takes place outer short circuit, the first pole piece of electrode subassembly and the electric connection between the utmost point post of end cover subassembly fuse from leading to groove, and the battery monomer is inside to be broken circuit, realizes fusing protect function.

In some embodiments, the fusing part is provided with a first insulating member at the periphery. Therefore, on one hand, the first insulating part can reduce the heat dissipation rate at the fusing part and accelerate the fusing speed of the fusing part; on the other hand, the area of the fusing part contacting with the electrolyte can be reduced, and the risk of explosion or fire of the single battery after the fusing part is fused is reduced.

In some embodiments, the end cap assembly further includes a connecting member, the connecting member is used for being connected with a bus member of the battery, the bus member is used for being electrically connected with the plurality of battery cells, the connecting member is disposed on one side of the cover body, which is away from the body, and the pole penetrates through the cover body and is connected with the connecting member. So, utmost point post passes through the connecting piece and connects the part that converges, and the stress that fusing portion received when can further reducing the part that converges and electrode terminal is connected, and structural stability is higher.

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 connecting the lug. Foretell battery monomer, end cover subassembly possess fusing protect function, and structural stability is higher.

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 high use safety and high structural stability.

An electric device comprises the battery. The battery of the electric equipment has good cruising ability and high 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 an embodiment;

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

FIG. 5 is a schematic view of an end cap assembly of an embodiment;

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

FIG. 7 is a top view of the end cap assembly shown in FIG. 5;

FIG. 8 isbase:Sub>A cross-sectional view taken along the plane A-A of the endcap assembly of FIG. 7;

FIG. 9 is a schematic view of an electrode terminal in the end cap assembly of the first embodiment;

FIG. 10 is a schematic view of an electrode terminal in the end cap assembly of the second embodiment;

FIG. 11 is a schematic view of an electrode terminal in the end cap assembly of the third embodiment;

FIG. 12 is a schematic view of an electrode terminal in the end cap assembly in the fourth embodiment;

fig. 13 is an exploded view of the electrode terminal shown in fig. 12.

Reference numerals:

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 diaphragm; 25. an end cap assembly; 100. a cover body; 110. positioning a groove; 200. a connecting member; 210. a second avoidance hole; 300. an electrode terminal; 310. a body; 310a, a first edge; 310b, a second edge; 311. a fusing portion; 311a, a through groove; 311b, a concave groove; 312. a first connection portion; 313. a second connecting portion; 320. a pole column; 400. a first insulating member; 500. a second insulating member; 510. a first avoidance hole; 600. a seal member; 700. a protective sheet; 800. an explosion-proof valve.

X, a first direction; z, a second 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 above figures are intended to cover non-exclusive inclusions.

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

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

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

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

With the popularization and promotion of new energy automobiles, the charge and discharge performance, the cruising ability and the like of the new energy automobiles increasingly attract attention and attention of people. 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, the fusing structure of the single battery is formed by opening a hole on an adapter and reducing the cross section area of the adapter to form the fusing structure. This structure is owing to trompil on the adaptor, can lead to the adaptor to be less strong in trompil department, and has the utmost point ear welding area because the relatively poor environment of operating mode leads to the torn risk of adaptor under, leads to the free performance of battery and security reliability relatively poor.

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 assembly of battery, the end cover assembly includes lid and electrode terminal, and electrode terminal locates on the lid and is used for the free electrode subassembly of electricity connection battery, and electrode terminal includes the body and is fixed in the utmost point post of body, and the body is located one side of lid, and utmost point post is located on the lid. The electrode assembly comprises a first pole piece and a second pole piece, the body is provided with a fusing part, and the fusing part is configured to be used for blocking the electric connection between the first pole piece and the pole. The end cover assembly has a fusing protection function by arranging the fusing part on the electrode terminal, so that the structural reliability is high; the fusing part is arranged on the body of the electrode terminal and is positioned on the inner side of the battery monomer, the stress applied to the fusing part when the bus component is connected with the electrode terminal can be reduced, and the structural stability is high.

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 traveling of the vehicle 10. In other embodiments of the present application, the battery 20 may be used 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 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 box 21 is used to provide a receiving space for the battery cell 22, and the box 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 end open, 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 case 21 formed by the first portion 21a and the second portion 21b may have various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 20, the battery cell 22 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 cells 22 may be cylindrical, flat, rectangular, or other shapes, etc. In the present application, the battery cell 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 cell 22 may be a cylinder, a flat body, a rectangular parallelepiped, 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, as shown in fig. 3, the cell 22 includes a case 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, and the plane 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. As shown in fig. 4, the electrode assembly 24 is mainly formed 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.

Referring to fig. 3 and 5, in an embodiment, the end cap assembly 25 is used in the battery cell 22, the end cap assembly 25 includes a cap body 100 and an electrode terminal 300, the electrode terminal 300 is disposed on the cap body 100 and is used for electrically connecting the electrode assembly 24 of the battery cell 22, referring to fig. 6 to 8, the electrode terminal 300 includes a body 310 and a post 320 fixed to the body 310, the body 310 is disposed on one side of the cap body 100, and the post 320 penetrates through the cap body 100.

Wherein the electrode assembly 24 includes a first pole piece 24a and a second pole piece 24b, referring to fig. 9, the body 310 has a fusing portion 311, and the fusing portion 311 is configured to block the electrical connection between the first pole piece 24a and the pole post 320.

In the present application, as shown in fig. 3 and 6, the end cap assembly 25 is a member covering the opening 23a of the housing 23 to isolate the internal environment of the battery cell 22 from the external environment. The cover body 100 of the cap assembly 25 may be provided with functional components such as the electrode terminal 300. In some embodiments, the cover body 100 may further include a protection sheet 700 and an explosion-proof valve 800 for releasing the internal pressure when the internal pressure or temperature of the battery cell 22 reaches a threshold value.

In the present application, as shown in fig. 3 and 6, the electrode terminal 300 is used to electrically connect with the electrode assembly 24 for outputting or inputting electric energy of the battery cell 22. Wherein the body 310 of the electrode terminal 300 is connected to the tabs of the electrode assembly 24.

In the present application, as shown in fig. 3 and 4, the electrode assembly 24 is a member of the battery cell 22 in which electrochemical reactions occur. One or more electrode assemblies 24 may be contained within the housing 23. The electrode assembly 24 is mainly formed 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 portions of the first and second pole pieces 24a and 24b having the active material constitute main portions of the electrode assembly, and the portions of the first and second pole pieces 24a and 24b having no active material constitute tabs, respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or at both ends of the main body portion, respectively. 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 terminals 300 to form a current loop. 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. 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 the cap assembly 25, the fusing part 311 is provided on the electrode terminal 300, so that the cap assembly 25 has a fusing protection function and has high structural reliability; the fusing part 311 is disposed on the body 310 of the electrode terminal 300 and located inside the battery cell 22, so that stress applied to the fusing part 311 when the bus member is connected to the electrode terminal 300 can be reduced, and structural stability is high.

According to some embodiments of the present disclosure, referring to fig. 9, the body 310 includes a first connection portion 312 and a second connection portion 313, the second connection portion 313 is used for electrically connecting tabs of the electrode assembly 24, the pole 320 is fixed to the first connection portion 312, and the fuse portion 311 is disposed between the first connection portion 312 and the second connection portion 313.

Note that, the tabs of the electrode assembly 24 are welded to the second connection portion 313 on the side facing the electrode assembly 24, and the posts 320 are welded to the first connection portion 312 on the side facing away from the electrode assembly 24.

In the present embodiment, the first connection portion 312 and the second connection portion 313 are integrally formed, and have good integrity and high mechanical strength. In other embodiments, the first connection portion 312 and the second connection portion 313 may also be a split structure and fixed by welding.

In the present embodiment, the first connection portion 312 and the second connection portion 313 are rectangular blocks. In other embodiments, the first connection portion 312 and the second connection portion 313 may also have a semicircular shape or other shapes. Here, the shapes of the first connection portion 312 and the second connection portion 313 are not particularly limited.

With the above arrangement, it is possible to provide the fusing part 311 on the body 310 of the electron electrode terminal 300 without interfering with the connection between the electrode terminal 300 and the tabs of the electrode assembly 24.

According to some embodiments of the present disclosure, referring to fig. 9, the body 310 has a first edge 310a and a second edge 310b along a first direction, a minimum distance between the second edge 310b and the post 320 is smaller than a minimum distance between the post 320 and the first edge 310a, and the first direction is an arrangement direction of the first connection portion 312 and the second connection portion 313.

Here, the first direction is the X direction shown in fig. 9, and the first connection portion 312 and the second connection portion 313 are arranged in parallel along the X direction shown in fig. 8. The first edge 310a is a side of the first connection portion 312 away from the fuse portion 311, and the second edge 310b is a side of the second connection portion 313 away from the fuse portion 311.

In the present embodiment, the first edge 310a and the second edge 310b are both straight. In other embodiments, the first edge 310a and the second edge 310b may both be curved; alternatively, one of the first edge 310a and the second edge 310b is straight and the other is curved.

With the above arrangement, the pole 320 is biased to be close to the second edge 310b, i.e. the pole 320 is biased on the body 310, so as to provide the fusing portion 311 on the body 310 and weld the pole ear.

According to some embodiments of the present application, referring to fig. 9, the fusing part 311 has a smaller cross-sectional area than other portions of the body 310.

Through the above arrangement, on the basis of not affecting the fusing protection function of the fusing part 311, the overcurrent area of the fusing part 311 is reduced, and the fusing part can be fused in time when the current exceeds the overcurrent limit.

According to some embodiments of the present disclosure, referring to fig. 9, the fuse portion 311 has a concave slot 311b, and the concave slot 311b is opened at a side of the fuse portion 311 along a second direction, which is perpendicular to the first direction.

Here, the second direction is the Z direction shown in fig. 8.

In the present embodiment, the recess groove 311b has an opening penetrating the side of the fusing part 311 in the second direction. The concave groove 311b may have a U shape, a C shape, or other shapes, and the shape of the concave groove 311b is not particularly limited.

In the present embodiment, the number of the concave grooves 311b is not limited to one. Referring to fig. 8, the fusing part 311 has two sides in the second direction, and at least two depressed grooves 311b may be provided on one of the sides, or at least two depressed grooves 311b may be provided on both sides. All the concave grooves 311b on the same side surface may be arranged side by side at intervals along the first direction, and the shapes and the sizes of all the concave grooves 311b may be completely the same or may not be completely the same.

For example, referring to fig. 9, two side surfaces of the fusing portion 311 along the second direction are respectively provided with a recessed groove 311b, the shape and the size of the two recessed grooves 311b are completely the same, and the two recessed grooves 311b are both U-shaped and have opposite opening directions.

Through the arrangement, when the single battery 22 is short-circuited, the first pole piece 24a of the electrode assembly 24 and the pole 320 of the end cap assembly 25 are electrically connected and fused from the concave groove 311b, and the single battery 22 is broken inside, so that the fusing protection function is realized.

According to some embodiments of the present disclosure, referring to fig. 10, the fusing portion 311 has a through groove 311a, and the through groove 311a penetrates through the body 310 along the thickness direction of the cover 100.

Here, the thickness direction of the lid body 100 is the Y direction shown in fig. 10.

In the present embodiment, the through-groove 311a is closed, and the through-groove 311a penetrates the body 310 along the thickness direction of the cover 100. The through groove 311a may have a rectangular shape, a circular shape, or other shapes, and the shape of the concave groove 311b is not particularly limited.

In this embodiment, the number of the through slots 311a is not limited to one, and the number of the through slots 311a may be at least two. When the fusing part 311 has at least two through slots 311a, all the through slots 311a may be arranged side by side at intervals or in an array along the same direction. The shapes and sizes of all the through grooves 311a may or may not be completely the same.

For example, referring to fig. 11, the fusing part 311 has two through slots 311a, and the two through slots 311a have the same shape and size and are arranged side by side at intervals along the second direction.

Through the arrangement, when the single battery 22 is short-circuited externally, the first pole piece 24a of the electrode assembly 24 and the pole 320 of the end cover assembly 25 are fused from the through groove 311a, and the single battery 22 is internally broken to realize the fusing protection function.

According to some embodiments of the present disclosure, referring to fig. 12 and 13, the first insulating member 400 is disposed on the periphery of the fusing portion 311.

In this embodiment, the first insulating member 400 is in a closed ring shape, and the first insulating member 400 is sleeved on the periphery of the fusing portion 311. In other embodiments, the first insulating member 400 may also have an open ring shape, and the first insulating member 400 may be adhered to the outer circumference of the fusing part 311.

Alternatively, the material of the first insulating member 400 may be plastic, rubber, or the like.

With the above arrangement, on one hand, the first insulating member 400 can reduce the heat dissipation rate at the fusing part 311, and accelerate the fusing speed of the fusing part 311; on the other hand, the area of the fusing part 311 contacting the electrolyte can be reduced, and the risk of explosion or fire of the battery cell 22 after the fusing part 311 is fused can be reduced.

According to some embodiments of the present disclosure, referring to fig. 6 and fig. 2, the end cap assembly 25 further includes a connecting member 200, the connecting member 200 is used for connecting with a bus component of the battery 20, the bus component is used for electrically connecting the plurality of battery cells 22, the connecting member 200 is disposed on a side of the cover body 100 away from the main body 310, and the post 320 penetrates through the cover body 100 and is connected with the connecting member 200.

In the present embodiment, the connector 200 is riveted with the post 320 of the electrode terminal 300 to fix the electrode terminal 300; the connecting member 200 is made of an aluminum alloy material to prevent deformation during press riveting. The connector 200 may be rectangular, circular, or other shape. Here, the specific shape of the connector 200 is not limited.

In the present embodiment, 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 200.

With the above arrangement, the pole 320 is connected to the bus bar member through the connector 200, and stress applied to the fusing part 311 when the bus bar member is connected to the electrode terminal 300 can be further reduced, resulting in high structural stability.

Referring to fig. 6, the end cap assembly 25 further includes a second insulating member 500, the cover 100 has a positioning groove 110 for accommodating the second insulating member 500, and the second insulating member 500 is located between the cover 100 and the connecting member 200.

Specifically, the cover body 100 is provided with a first groove for accommodating the second insulating member 500, the second insulating member 500 is provided with a first avoidance hole 510, the connecting member 200 is provided with a second avoidance hole 210, and the pole 320 penetrates through the first avoidance hole 510 and the second avoidance hole 210 and is then riveted with the connecting member 200.

In the present application, the second insulating member 500 is an electrical connecting member for isolating the connector 200 and the cover 100, so as to reduce the risk of short circuit. Illustratively, the second insulator 500 may be plastic, rubber, or the like.

With the above arrangement, the electrical connection between the lid 100 and the post 320 is blocked by the second insulating member 500.

Referring to fig. 6, the end cap assembly 25 further includes a sealing member 600, and the sealing member 600 is disposed between the pole 320 and the second insulating member 500.

Here, the sealing member 700 is annular, and the sealing member 700 is sleeved on the periphery of the main body portion 320 and is limited in the second insulating member 600. Illustratively, the seal 700 may be plastic, rubber, or the like.

Through the setting, isolated utmost point post 320 and second insulating part 500 through sealing member 600 improve the whole leakproofness of structure.

Referring to fig. 3 and 5, in an embodiment, the battery cell 22 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, the cover 100 is disposed on the opening 23a, and the body 310 is disposed in the case 23.

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. The housing 23 and the cover 100 may be integrated, and 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.

Above-mentioned battery monomer 22, end cover subassembly 25 possess fusing protect function, and structural stability is higher.

Referring to fig. 2, the 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.

The battery 20 has high safety and structural stability.

Referring to fig. 1, an embodiment of the electric device includes the battery 20. The battery 20 of the electric equipment has good cruising ability and high safety.

Referring to fig. 5 and 6, according to some embodiments of the present disclosure, in one embodiment, the end cap assembly 25 is used in a battery cell 22, the end cap assembly 25 includes a cover 100 and an electrode terminal 300, the electrode terminal 300 is disposed on the cover 100 and is used to electrically connect to an electrode assembly 24 of the battery cell 22, and referring to fig. 5 to 7, the electrode terminal 300 includes a body 310 and a post 320 fixed to the body 310, the body 310 is located on one side of the cover 100, and the post 320 penetrates through the cover 100. Wherein the electrode assembly 24 includes a first pole piece 24a and a second pole piece 24b, referring to fig. 8 to 10, the body 310 has a fusing portion 311, and the fusing portion 311 is configured to block an electrical connection between the first pole piece 24a and the pole post 320. Referring to fig. 11 and 12, the first insulating member 400 is disposed on the outer circumference of the fusing part 311.

Referring to fig. 3, a battery cell 22 in one embodiment includes a housing 23, an electrode assembly 24, and the end cap assembly 25, the housing 23 has an opening 23a, the electrode assembly 24 is disposed in the housing 23, and a cap body 310 covers the opening 23a

According to some embodiments of the present application, please refer to fig. 2, an embodiment of a battery 20 includes the battery cell 22.

According to some embodiments of the present application, referring to fig. 1, an electrical device in one embodiment includes the above-mentioned battery 20, and the battery 20 is used for supplying power to the electrical device.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not depart from the spirit of the embodiments of the present application, and they should be construed as being included in the scope of the claims and description of the present application. 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 (11)

1. An end cap assembly (25) for use in a battery cell (22), the end cap assembly (25) comprising:

a cover body (100);

an electrode terminal (300) provided on the lid body (100) and electrically connected to an electrode assembly (24) of the battery cell (22); the electrode terminal (300) comprises a body (310) and a pole post (320) fixed on the body (310), the body (310) is positioned on one side of the cover body (100), and the pole post (320) penetrates through the cover body (100);

wherein the electrode assembly (24) comprises a first pole piece (24 a) and a second pole piece (24 b), the body (310) has a fuse (311), the fuse (311) is configured for breaking an electrical connection between the first pole piece (24 a) and the pole post (320).

2. The end cap assembly (25) of claim 1, wherein the body (310) includes a first connection portion (312) and a second connection portion (313), the second connection portion (313) is used for electrically connecting tabs of the electrode assembly (24), the pole (320) is fixed to the first connection portion (312), and the fuse portion (311) is disposed between the first connection portion (312) and the second connection portion (313).

3. The end cap assembly (25) of claim 2, wherein the body (310) has a first edge (310 a) and a second edge (310 b) along a first direction, the second edge (310 b) having a minimum distance from the post (320) that is less than the minimum distance from the post to the first edge (310 a), the first direction being an alignment direction of the first connection portion (312) and the second connection portion (313).

4. The end cap assembly (25) of claim 1, wherein the fuse portion (311) has a smaller cross-sectional area than other portions of the body (310).

5. The end cap assembly (25) of claim 4, wherein the fuse portion (311) is provided with a recessed groove (311 b), the recessed groove (311 b) opening to a side of the fuse portion (311) in a second direction, the second direction being perpendicular to the first direction.

6. The end cap assembly (25) of claim 4, wherein the fuse portion (311) is provided with a through groove (311 a), the through groove (311 a) penetrating the body (310) in a thickness direction of the cover body (100).

7. The end cap assembly (25) of claim 1, wherein the fuse portion (311) is peripherally provided with a first insulating member (400).

8. The end cap assembly (25) of claim 1, wherein the end cap assembly (25) further comprises a connector (200) connected to a bus member of a battery, the bus member is used for electrically connecting a plurality of the battery cells (22), the connector (200) is disposed on a side of the cover (100) away from the body (310), and the post (320) penetrates through the cover (100) and is connected to the connector (200).

9. A battery cell (22), comprising:

a housing (23) having an opening (23 a);

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

the end cap assembly (25) of any of claims 1-8, wherein the cover body (100) covers the opening (23 a), and the body (310) is located in the housing (23) and is used for connecting the tabs.

10. A battery (20), comprising:

a plurality of battery cells (22) according to claim 9

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

11. An electric consumer, characterized in that it comprises a battery (20) according to claim 10.

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