CN217788602U - End cover, battery monomer, battery and consumer - Google Patents

Abstract

The application provides an end cover, a single battery, a battery and electric equipment, and relates to the field of batteries. The end cover comprises a cover body, a pressure relief boss and an insulating piece, wherein the cover body is provided with a pressure relief area and an outer surface. Along the thickness direction of lid body, the surface is located to the pressure release boss is protruding to enclose and locate the pressure release district. An insulator is attached to the outer surface. Wherein, along thickness direction, the pressure release boss is along the direction that deviates from the surface not surpassing the insulator and deviating from the one end of surface. The pressure relief boss of the end cap does not extend beyond the end of the insulating member facing away from the outer surface in the direction facing away from the outer surface, and thus the height of the pressure relief boss is low. The wiring harness can not be extruded by the pressure relief boss, the stress concentration of the wiring harness can not be caused, and the possibility of damage of the wiring harness is reduced.

Description

End cover, battery monomer, battery and consumer

Technical Field

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

Background

Batteries are widely applied in the field of new energy resources, such as electric vehicles, new energy vehicles and the like, and the new energy vehicles and the electric vehicles become new development trends of the automobile industry. A plurality of wiring harnesses are arranged inside the battery. However, in the cell-inverted scenario, some of the wiring harnesses are often damaged, resulting in battery failure.

SUMMERY OF THE UTILITY MODEL

An object of this application embodiment is to provide an end cover, battery monomer, battery and consumer, it aims at improving the problem that the pencil often damages among the correlation technique, leads to the battery inefficacy.

In a first aspect, an embodiment of the present application provides an end cap, where the end cap includes a cap body, a pressure relief boss, and an insulating member, where the cap body has a pressure relief area and an outer surface; the pressure relief boss is arranged on the outer surface in a protruding mode in the thickness direction of the cover body and surrounds the pressure relief area; the insulator is attached to the outer surface; and in the thickness direction, the pressure relief boss does not exceed one end, deviating from the outer surface, of the insulating piece in the direction deviating from the outer surface.

In the technical scheme, the pressure relief boss of the end cover does not exceed one end, away from the outer surface, of the insulating part along the direction away from the outer surface, so that the height of the pressure relief boss is lower. The wiring harness can not be extruded by the pressure relief boss, the stress concentration of the wiring harness can not be caused, and the possibility of damage of the wiring harness is reduced.

As an optional technical solution of the embodiment of the present application, the insulating member has a covering portion covering the outer surface, the covering portion has a first surface and a second surface arranged oppositely along the thickness direction, the first surface faces the outer surface, the covering portion is provided with a through hole penetrating through the first surface and the second surface, and the pressure relief boss is accommodated in the through hole.

In above-mentioned technical scheme, the pressure release boss holds in the through-hole that runs through the first surface and the second surface of cover for the pressure release boss does not surpass from the second surface along the direction that deviates from the surface, and like this, the pencil can not extruded to the pressure release boss, can not cause pencil stress concentration, has reduced the possibility of pencil damage.

As an optional technical solution of the embodiment of the present application, along the thickness direction, a surface of the pressure relief boss departing from the outer surface is closer to the outer surface than the second surface.

In the above technical scheme, along the thickness direction, the distance from the surface of the pressure relief boss departing from the outer surface to the outer surface is less than the distance from the second surface to the outer surface. Also along thickness direction, the surface that the pressure release boss deviates from the surface is less than the second surface for the pencil is difficult for contacting with the pressure release boss, can not cause pencil stress concentration, is favorable to protecting the pencil not damaged.

As an optional technical solution of the embodiment of the present application, the end cap includes a protection member, the protection member is disposed on the pressure relief boss and covers the pressure relief area, and the protection member is at least partially located in the through hole.

In the technical scheme, the protection piece is arranged, so that the pressure relief area can be protected on the one hand, and external impurities are prevented from entering the pressure relief area. On the other hand, the protection member can prevent the electrolyte from entering the pressure relief area during liquid injection.

As an optional technical scheme of the embodiment of the application, the surface of the protection piece, which faces away from the pressure relief boss, is flush with the second surface.

In above-mentioned technical scheme, through making protection piece deviate from the surface and the second surface parallel and level of pressure release boss, protection piece can not protrusion in the second surface, and protection piece can not extrude the pencil, can not cause pencil stress concentration, has reduced the possibility of pencil damage.

As an optional technical solution of the embodiment of the present application, an outer side surface of the protection member is spaced from a hole wall of the through hole.

In the above technical solution, a gap is provided between the outer side surface of the protector and the hole wall of the through hole, so as to arrange the protector.

As an alternative to the embodiments of the present application, the end cap includes a protection covering the pressure relief area.

In the technical scheme, the protection piece is arranged, so that the pressure relief area can be protected on the one hand, and external impurities are prevented from entering the pressure relief area. On the other hand, the protection member can prevent the electrolyte from entering the pressure relief area during liquid injection.

As an optional technical scheme of this application embodiment, protection piece set up in the pressure release boss, follow the thickness direction, protection piece deviates from the surface of surface with the insulating part deviates from the one end parallel and level of surface.

In above-mentioned technical scheme, through making the surface that protection piece deviates from the surface and the one end parallel and level that the insulating part deviates from the surface, protection piece can not bulge in the insulating part, and protection piece can not extrude the pencil, can not cause pencil stress concentration, has reduced the possibility of pencil damage.

As an optional technical scheme of this application embodiment, follow thickness direction, the pressure release boss deviates from the surface of surface with the insulating part deviates from the one end parallel and level of surface.

In the above technical scheme, along the thickness direction, the distance from the surface of the pressure relief boss departing from the outer surface to the outer surface is equal to the distance from the surface of the insulating member departing from the outer surface to the outer surface. Also lie in the coplanar with the surface that deviates from the surface of insulating part deviates from the surface that the pressure release boss deviates from the surface for the pencil is difficult to contact with the pressure release boss, can not cause pencil stress concentration, is favorable to protecting the pencil not to receive the damage.

In a second aspect, an embodiment of the present application further provides a battery cell, where the battery cell includes an electrode assembly, a case, and the end cap, where the case has an accommodating space with an opening at one end, and the accommodating space is used for accommodating the electrode assembly; the end cap is connected to the housing and closes the opening.

In a third aspect, an embodiment of the present application further provides a battery, where the battery includes a box body and the above battery cell, and the battery cell is accommodated in the box body.

As an optional technical solution of the embodiment of the present application, the end cover is disposed on one side of the battery cell close to the bottom wall of the box body.

In the technical scheme, the end cover is arranged on one side of the bottom wall, close to the box body, of the battery monomer, namely, the battery monomer is placed in the box body in an inverted mode.

In a fourth aspect, an embodiment of the present application further provides an electric device, where the electric device includes the above battery, and the battery is used to provide electric energy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

fig. 2 is an exploded view of a battery provided in accordance with some embodiments of the present application;

fig. 3 is a schematic structural diagram of a battery cell according to some embodiments of the present disclosure;

FIG. 4 is a schematic top view of an end cap provided by some embodiments of the present application;

FIG. 5 isbase:Sub>A cross-sectional view taken at the location A-A in FIG. 4;

FIG. 6 is an enlarged view of position B of FIG. 5;

FIG. 7 is a schematic top view of an end cap according to further embodiments of the present application;

FIG. 8 is a cross-sectional view taken at position D-D of FIG. 7;

FIG. 9 is an enlarged view of the E position in FIG. 8;

FIG. 10 is a schematic top view of an end cap provided in accordance with further embodiments of the present application;

FIG. 11 is a cross-sectional view taken at the location F-F in FIG. 10;

fig. 12 is an enlarged view of the position G in fig. 11.

Icon: 10-a box body; 11-a first part; 12-a second part; 20-a battery cell; 21-end cap; 211-a lid body; 2111-pressure relief zone; 2112-external surface; 2113-inner surface; 212-a pressure relief boss; 213-an insulator; 2131-a through hole; 214-a protective element; 215-glue layer; 22-an electrode assembly; 23-a housing; 100-a battery; 200-a controller; 300-a motor; 1000-vehicle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

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 in the description of the application in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof in the description and claims of this application and the description of the figures above, are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different elements and not for describing a particular sequential or chronological order.

Reference in the specification 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 specification. 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.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "attached" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The term "and/or" in this application is only one kind of association relationship describing the association object, and means that there may be three kinds of relationships, 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 "/" in this application generally indicates that the former and latter related objects are in an "or" relationship.

In the embodiments of the present application, like reference numerals denote like parts, and a detailed description of the same parts is omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the present application and the overall thickness, length, width and other dimensions of the integrated device shown in the drawings are only exemplary and should not constitute any limitation to the present application.

The appearances of "a plurality" in this application are intended to mean more than two (including two).

In this application, the battery cell may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, and the embodiment of the present application is not limited thereto. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in an encapsulation manner: the cylindrical battery monomer, the square battery monomer and the soft package battery monomer are also not limited in the embodiment of the application.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charge or discharge of battery cells.

The battery monomer comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive plate, a negative plate and an isolating membrane. The battery cell mainly depends on metal ions moving between the positive plate and the negative plate to work. The positive plate comprises a positive current collector and a positive active substance layer, wherein the positive active substance layer is coated on the surface of the positive current collector, the positive current collector which is not coated with the positive active substance layer protrudes out of the positive current collector which is coated with the positive active substance layer, and the positive current collector which is not coated with the positive active substance layer is used as a positive lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative pole piece includes negative pole mass flow body and negative pole active substance layer, and the surface of negative pole mass flow body is scribbled to the negative pole active substance layer, and the negative pole mass flow body protrusion in the negative pole mass flow body of having scribbled the negative pole active substance layer of not scribbling the negative pole active substance layer, and the negative pole mass flow body of not scribbling the negative pole active substance layer is as negative pole ear. The material of the negative electrode collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the fuse is not fused when a large current is passed, a plurality of positive electrode tabs are stacked, and a plurality of negative electrode tabs are stacked. The material of the isolation film may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may have a winding structure or a lamination structure, and the embodiment of the present application is not limited thereto.

Batteries are widely applied in the field of new energy resources, such as electric vehicles, new energy vehicles and the like, and the new energy vehicles and the electric vehicles become new development trends of the automobile industry.

Numerous wiring harnesses are arranged inside the battery, and the inventor notices that in a cell-inverted scenario, some of the wiring harnesses are often damaged, resulting in battery failure.

The inventor further studies and finds that in the prior art, the height of the boss around the explosion-proof valve is higher than that of the insulating member. Therefore, in the scene of inversion of the battery core, the wiring harness is easily extruded by the boss, the stress concentration of the wiring harness is caused, and the wiring harness is damaged.

In view of this, an embodiment of the present application provides an end cap, which includes a cap body, a pressure relief boss and an insulating member, wherein the pressure relief boss is protruded from an outer surface of the cap body, and the insulating member is attached to the outer surface. Along the thickness direction of lid body, the pressure release boss does not surpass the one end that the insulating part deviates from the surface along the direction that deviates from the surface.

The pressure relief boss of the end cap does not extend beyond the end of the insulating member facing away from the outer surface in the direction facing away from the outer surface, and thus the height of the pressure relief boss is low. The wiring harness can not be extruded by the pressure relief boss, the stress concentration of the wiring harness can not be caused, and the possibility of damage of the wiring harness is reduced.

The technical scheme described in the embodiment of the application is suitable for 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. Spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; the 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 power tools include metal cutting electric power tools, grinding electric power tools, assembly electric power tools, and electric power 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.

For convenience of description, the following embodiments will be described by taking an electric device as the vehicle 1000.

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 case 10 is used to provide a receiving space for the battery cell 20, and the case 10 may have 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 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, so that the first part 11 and the second part 12 jointly define a containing space; 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 case 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 20 may be multiple, and the multiple battery cells 20 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 20. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery cells 20 is accommodated in the box body 10; of course, the battery 100 may also be formed by connecting a plurality of battery cells 20 in series, in parallel, or in series-parallel to form a battery module, and then connecting a plurality of battery modules in series, in parallel, or in series-parallel to form a whole, and accommodating the whole in the case 10. The battery 100 may also include other structures, for example, the battery 100 may further include a bus member for achieving electrical connection between the plurality of battery cells 20.

Wherein, each battery cell 20 may be a secondary battery cell or a primary battery cell; but not limited thereto, a lithium sulfur battery cell, a sodium ion battery cell, or a magnesium ion battery cell may also be used. The battery cell 20 may be cylindrical, flat, rectangular parallelepiped, or other shape.

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 100. As shown in fig. 3, the battery cell 20 includes an end cap 21, an electrode assembly 22, a case 23, and other functional components.

The end cap 21 refers to a member that covers an opening of the case 23 to insulate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 may be adapted to the shape of the housing 23 to fit the housing 23. Alternatively, the end cap 21 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the end cap 21 is not easily deformed when being impacted, and the battery cell 20 may have a higher structural strength and improved safety. The end cap 21 may be provided with functional components such as electrode terminals (not shown in the drawings). The electrode terminals may be used to electrically connect with the electrode assembly 22 for outputting or inputting electric power of the battery cell 20. The material of the end cap 21 may also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment.

The case 23 is an assembly for fitting the end cap 21 to form an internal environment of the battery cell 20, wherein the formed internal environment may be used to house the electrode assembly 22, an electrolyte, and other components. The housing 23 and the end cap 21 may be separate components, and an opening may be formed in the housing 23, and the opening may be covered by the end cap 21 to form the internal environment of the battery cell 20. The end cap 21 and the housing 23 may be integrated, and specifically, the end cap 21 and the housing 23 may form a common connecting surface before other components are inserted into the housing, and when it is required to seal the inside of the housing 23, the end cap 21 covers the housing 23. The housing 23 may be of various shapes and 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 22. 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.

The electrode assembly 22 is a component of the battery cell 20 in which electrochemical reactions occur. One or more electrode assemblies 22 may be contained within the case 23. 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 provided 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 portions of the electrode assembly 22, and the portions of the positive and negative electrode tabs having no active material each constitute a tab. 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 100, the positive and negative active materials react with the electrolyte, and the tabs are connected to the electrode terminals to form a current loop.

Referring to fig. 3, 4, 5 and 6, fig. 4 is a schematic top view of an end cap 21 according to some embodiments of the present disclosure. Fig. 5 isbase:Sub>A cross-sectional view taken atbase:Sub>A-base:Sub>A in fig. 4. Fig. 6 is an enlarged view of the position B in fig. 5. The embodiment of the application provides an end cover 21, and the end cover 21 comprises a cover body 211, a pressure relief boss 212 and an insulating piece 213. The lid body 211 has a relief area 2111 and an outer surface 2112. Along the thickness direction of the cover body 211, the pressure relief boss 212 is protruded from the outer surface 2112 and surrounds the pressure relief region 2111. The insulation 213 is attached to the outer surface 2112. Wherein, in the thickness direction, the pressure relief boss 212 does not extend beyond an end of the insulator 213 facing away from the outer surface 2112 in a direction facing away from the outer surface 2112.

The cover body 211 is a main structure of the end cover 21, and is mainly used for closing the opening of the housing 23. The shape of the cover body 211 is adapted to the shape of the opening of the housing 23. For example, when the opening of the case 23 is rectangular, the cover body 211 is also rectangular. When the opening of the case 23 is circular, the cover body 211 is also circular in shape.

The pressure relief region 2111 is a region of the cover body 211 that performs a pressure relief function. For example, the relief area 2111 may be an area of the end cap 21 where a burst disk is welded. For another example, the end cap 21 is provided with a pressure relief groove, and the pressure relief area 2111 is an area inside the pressure relief groove.

The pressure relief boss 212 is a convex structure that protrudes from one side of the lid body 211 in the thickness direction (the C direction shown in fig. 6) and is provided around the pressure relief region 2111. The lid body 211 has an inner surface 2113 and an outer surface 2112 opposed to each other in the thickness direction, the inner surface 2113 of the lid body 211 faces the inside of the case 23, and the outer surface 2112 of the lid body 211 is disposed away from the case 23. In this embodiment, the pressure relief boss 212 is disposed on the outer surface 2112 of the cover body 211.

The relief boss 212 is a raised structure extending along a closed trajectory. The closed track is a track with two ends connected end to end, such as a rectangular track, an elliptical track and the like. When the pressure relief boss 212 is a protrusion structure extending along a rectangular track, the pressure relief boss 212 encloses a rectangle. When the pressure relief boss 212 is a protrusion structure extending along an elliptical trajectory, the pressure relief boss 212 encloses an ellipse. The structure of the pressure relief boss 212 may vary with the shape of the closed track, which is not limited in this embodiment.

The insulating member 213 is made of a material having an insulating property, such as plastic or rubber, and the insulating member 213 is used for insulating and isolating the cover body 211 from the outside, so as to prevent the cover body 211 from being electrically connected to the outside, which may cause a short circuit of the battery cell 20.

By "the insulator 213 is attached to the outer surface 2112" is meant that the insulator 213 is conformed to and secured to the outer surface 2112. For example, the insulator 213 is adhered to the outer surface 2112 by an adhesive. As shown in fig. 6, the insulator 213 is bonded to the outer surface 2112, and a glue layer 215 is formed between the insulator 213 and the outer surface 2112. For another example, the insulation 213 may be secured against the exterior surface 2112 by drawing a negative pressure between the insulation 213 and the exterior surface 2112, such that the insulation 213 is held against the exterior surface 2112 by atmospheric pressure.

"the end of the pressure relief boss 212 facing away from the outer surface 2112 in a direction away from the outer surface 2112 does not exceed the end of the insulator 213 facing away from the outer surface 2112" means that the distance between the surface of the pressure relief boss 212 facing away from the outer surface 2112 and the outer surface 2112 in the thickness direction is less than or equal to the distance between the end of the insulator 213 facing away from the outer surface 2112 and the outer surface 2112.

The pressure relief bosses 212 of the end cap 21 do not extend beyond the end of the insulator 213 facing away from the outer surface 2112 in a direction away from the outer surface 2112, so that the height of the pressure relief bosses 212 is low. The wiring harness is not extruded by the pressure relief boss 212, so that stress concentration of the wiring harness is not caused, and the possibility of damage of the wiring harness is reduced.

In some embodiments, the insulating member 213 has a covering portion that covers the outer surface 2112, the covering portion having a first surface and a second surface that are oppositely arranged in the thickness direction, the first surface facing the outer surface 2112. The covering part is provided with a through hole 2131 penetrating through the first surface and the second surface, and the pressure relief boss 212 is accommodated in the through hole 2131.

The overlay refers to the portion of the insulator 213 that covers the outer surface 2112. For example, when the cover body 211 has a plate-like structure and the insulating member 213 has a plate-like structure, the outer surface 2112 of the cover body 211 is a plane of the cover body 211 away from the housing 23, the insulating member 213 covers the entire outer surface 2112, and the covering portion covers the entire insulating member 213. For another example, when the cover body 211 partially protrudes in the thickness direction in a direction away from the housing 23 to form a first protrusion, the insulating member 213 also partially protrudes in the thickness direction in a direction away from the housing 23 to form a second protrusion to match with the cover body 211. At this time, the outer surface 2112 refers to the surface of the first convex portion facing away from the housing 23, and the covering portion refers to the portion of the insulating member 213 covering the first convex portion.

The first surface refers to a surface on the covering portion near the outer surface 2112, and the second surface refers to a surface on the covering portion away from the outer surface 2112, the first surface and the second surface being disposed opposite to each other in the thickness direction of the cap body 211.

The through hole 2131 penetrates the first surface and the second surface. The through hole 2131 may be a straight hole extending in the thickness direction or an inclined hole arranged obliquely.

The pressure relief boss 212 is accommodated in the through hole 2131 that runs through the first surface and the second surface of the covering portion, so that the pressure relief boss 212 does not exceed the second surface along the direction that deviates from the outer surface 2112, and thus, the wiring harness is not extruded by the pressure relief boss 212, the stress concentration of the wiring harness is not caused, and the possibility of damage of the wiring harness is reduced.

Referring to fig. 4, 5, and 6, in some embodiments, the surface of the pressure relief boss 212 facing away from the outer surface 2112 is closer to the outer surface 2112 than the second surface along the thickness direction.

"the surface of the pressure relief boss 212 facing away from the outer surface 2112 is closer to the outer surface 2112 than the second surface" in the thickness direction can also be understood as: along the thickness direction, the surface of relief boss 212 facing away from outer surface 2112 is a distance from outer surface 2112 that is less than the distance from the second surface to outer surface 2112. That is, the surface of relief boss 212 facing away from outer surface 2112 is lower than the second surface in the thickness direction.

Through making pressure release boss 212 deviate from the surface of surface 2112 and be closer to surface 2112 than the second surface on the thickness direction for the pencil is difficult to contact with pressure release boss 212, can not cause pencil stress concentration, is favorable to protecting the pencil not damaged.

In some embodiments, the end cap 21 includes a protection member 214, and the protection member 214 is disposed on the relief boss 212 and covers the relief area 2111. Protector 214 is at least partially disposed within through hole 2131.

The protector 214 is a member of the end cover 21 that shields the relief area 2111. One side of the protector 214 fits against the surface of the pressure relief boss 212 remote from the outer surface 2112, so that the protector 214 completely shields the pressure relief region 2111.

"the protector 214 is at least partially located in the through hole 2131" means that the distance from the surface of the protector 214 facing the outer surface 2112 to the outer surface 2112 is smaller than the distance from the second surface to the outer surface 2112, and the distance from the surface of the protector 214 facing away from the pressure relief boss 212 to the outer surface 2112 may be smaller than, equal to, or larger than the distance from the second surface to the outer surface 2112.

By providing the protective element 214, the pressure relief area 2111 can be protected from foreign matter entering the pressure relief area 2111. On the other hand, the protector 214 can prevent the electrolyte from entering the pressure relief region 2111 at the time of liquid injection.

Referring to fig. 4, 5 and 6, in some embodiments, the surface of the protection member 214 facing away from the pressure relief boss 212 is flush with the second surface.

"the surface of the protector 214 facing away from the pressure relief boss 212 is flush with the second surface", that is, the distance from the surface of the protector 214 facing away from the pressure relief boss 212 to the outer surface 2112 is equal to the distance from the second surface to the outer surface 2112, or there is no height difference between the surface of the protector 214 facing away from the pressure relief boss 212 and the second surface.

Through the surface and the second surface parallel and level that make protection piece 214 deviate from pressure release boss 212, protection piece 214 can not bulge in the second surface, and protection piece 214 can not extrude the pencil, can not cause pencil stress concentration, has reduced the possibility of pencil damage.

Referring to fig. 7, 8 and 9, fig. 7 is a schematic top view of an end cap 21 according to other embodiments of the present application. Fig. 8 is a cross-sectional view taken at the position D-D in fig. 7. Fig. 9 is an enlarged view of the position E in fig. 8. In other embodiments, the surface of the protector 214 facing away from the relief boss 212 is closer to the outer surface 2112 than the second surface to the outer surface 2112 in the thickness direction. That is, the surface of the protector 214 facing away from the relief boss 212 is lower than the second surface. Thus, a large escape space can be formed to escape the wire harness, and the wire harness is prevented from contacting the protector 214 to cause stress concentration of the wire harness.

Referring to fig. 9, in some embodiments, the outer side surface of the protection member 214 is spaced from the hole wall of the through hole 2131.

The "arrangement of the clearance between the outer surface of the protector 214 and the wall of the through hole 2131" can be understood as follows: the protective member 214 is disposed spaced apart from the insulating member 213 in a direction perpendicular to the thickness direction of the cover body 211.

By forming a gap between the outer side surface of the protector 214 and the hole wall of the through hole 2131, the protector 214 is arranged easily.

In some embodiments, end cap 21 includes a protector 214, and protector 214 covers relief area 2111.

The protector 214 is a part of the end cover 21 that shields the relief area 2111. One side of the protector 214 fits against the surface of the pressure relief boss 212 away from the outer surface 2112 so that the protector 214 completely shields the pressure relief region 2111.

By providing the protective element 214, the pressure relief area 2111 can be protected from foreign matter entering the pressure relief area 2111. On the other hand, the protector 214 can prevent the electrolyte from entering the pressure relief region 2111 at the time of liquid injection.

In some embodiments, the protection member 214 is disposed on the pressure relief boss 212, and a surface of the protection member 214 facing away from the outer surface 2112 is flush with an end of the insulating member 213 facing away from the outer surface 2112 in the thickness direction.

"the surface of the protector 214 facing away from the outer surface 2112 is flush with the end of the insulator 213 facing away from the outer surface 2112", that is, the distance from the surface of the protector 214 facing away from the outer surface 2112 to the outer surface 2112 is equal to the distance from the surface of the insulator 213 facing away from the outer surface 2112 to the outer surface 2112, or there is no height difference between the surface of the protector 214 facing away from the outer surface 2112 and the surface of the insulator 213 facing away from the outer surface 2112.

By making the surface of the protector 214 facing away from the outer surface 2112 flush with the end of the insulator 213 facing away from the outer surface 2112, the protector 214 does not bulge out of the insulator 213, the protector 214 does not squeeze the wire harness, stress concentration of the wire harness is not caused, and the possibility of damage of the wire harness is reduced.

Referring to fig. 10, 11 and 12, fig. 10 is a top view of an end cap 21 according to some embodiments of the present disclosure. Fig. 11 is a cross-sectional view taken at the position F-F in fig. 10. Fig. 12 is an enlarged view of the position G in fig. 11. In still other embodiments, the surface of the pressure relief boss 212 facing away from the outer surface 2112 is flush with the end of the insulator 213 facing away from the outer surface 2112 along the thickness direction.

"the surface of the pressure relief boss 212 facing away from the outer surface 2112 is flush with the end of the insulator 213 facing away from the outer surface 2112" in the thickness direction "can also be understood as: the distance in the thickness direction from the surface of the pressure relief boss 212 facing away from the outer surface 2112 to the outer surface 2112 is equal to the distance from the surface of the insulator 213 facing away from the outer surface 2112 to the outer surface 2112. That is, the surface of the pressure relief boss 212 facing away from the outer surface 2112 is in the same plane as the surface of the insulator 213 facing away from the outer surface 2112.

By adopting the arrangement, the wiring harness is not easy to contact with the pressure relief boss 212, the stress concentration of the wiring harness is avoided, and the protection of the wiring harness is facilitated.

Referring to FIG. 12, in some embodiments, the distance from the surface of the protector 214 facing away from the outer surface 2112 to the outer surface 2112 is greater than the distance from the surface of the insulator 213 facing away from the outer surface 2112 to the outer surface 2112, i.e., the surface of the protector 214 facing away from the outer surface 2112 is higher than the surface of the insulator 213 facing away from the outer surface 2112.

Since the protector 214 is generally made of rubber, plastic, or other material that is easily deformed, even if the surface of the protector 214 facing away from the outer surface 2112 is higher than the surface of the insulator 213 facing away from the outer surface 2112, the protector 214 can be deformed when the protector 214 comes into contact with the wire harness, so as to reduce the risk of stress concentration in the wire harness.

The embodiment of the present application further provides a battery cell 20, where the battery cell 20 includes an electrode assembly 22, a case 23, and the end cap 21. The case 23 has an accommodation space with one end open for accommodating the electrode assembly 22. The end cap 21 is attached to the housing 23 and closes the opening.

The embodiment of the present application further provides a battery 100, where the battery 100 includes a case 10 and the battery cell 20, and the battery cell 20 is accommodated in the case 10.

In some embodiments, the end cap 21 is disposed on a side of the battery cell 20 near the bottom wall of the case 10.

The bottom wall of the housing 10 is the wall of the housing 10 opposite the open end of the housing 10.

The battery cell 20 is placed upside down in the case 10 by disposing the end cap 21 on the side of the battery cell 20 close to the bottom wall of the case 10.

The embodiment of the present application further provides an electric device, where the electric device includes the above battery 100, and the battery 100 is used for providing electric energy.

Please refer to fig. 3-6 according to some embodiments of the present application.

The embodiment of the application provides an end cover 21, and the end cover 21 includes a cover body 211, a pressure relief boss 212 and an insulating member 213. The lid body 211 has a relief area 2111 and an outer surface 2112. Along the thickness direction of the cover body 211, the pressure relief boss 212 is protruded from the outer surface 2112 and surrounds the pressure relief region 2111. The insulator 213 is attached to the outer surface 2112. Wherein, in the thickness direction, the pressure relief boss 212 does not extend beyond an end of the insulator 213 facing away from the outer surface 2112 in a direction facing away from the outer surface 2112. The insulating member 213 has a covering portion that covers the outer surface 2112, the covering portion having a first surface and a second surface that are arranged oppositely in the thickness direction, the first surface facing the outer surface 2112. The covering part is provided with a through hole 2131 penetrating through the first surface and the second surface, and the pressure relief boss 212 is accommodated in the through hole 2131. In the thickness direction, the surface of the relief boss 212 facing away from the outer surface 2112 is closer to the outer surface 2112 than the second surface. The end cap 21 includes a protection member 214, the protection member 214 is disposed on the pressure relief boss 212 and covers the pressure relief area 2111, and the protection member 214 is at least partially disposed in the through hole 2131. The surface of the protector 214 facing away from the pressure relief boss 212 is flush with the second surface. The outer surface of the protector 214 is spaced apart from the hole wall of the through hole 2131.

The pressure relief bosses 212 of the end cap 21 do not extend beyond the end of the insulator 213 facing away from the outer surface 2112 in a direction away from the outer surface 2112, so that the height of the pressure relief bosses 212 is low. The pressure relief boss 212 does not extrude the wiring harness, so that stress concentration of the wiring harness is avoided, and the possibility of damage of the wiring harness is reduced. The pressure relief boss 212 is accommodated in the through hole 2131 that runs through the first surface and the second surface of cover portion for the pressure relief boss 212 does not exceed in the second surface along the direction that deviates from the surface 2112, and like this, the pencil can not extruded to the pressure relief boss 212, can not cause pencil stress concentration, has reduced the possibility of pencil damage. Along the thickness direction, the surface of relief boss 212 facing away from outer surface 2112 is a distance from outer surface 2112 that is less than the distance from the second surface to outer surface 2112. That is along the thickness direction, the surface that pressure release boss 212 deviates from surface 2112 is less than the second surface for the pencil is difficult to be in contact with pressure release boss 212, can not cause pencil stress concentration, is favorable to protecting the pencil not to receive the damage.

By providing the protective element 214, the pressure relief area 2111 can be protected from foreign matter entering the pressure relief area 2111. On the other hand, the protector 214 can prevent the electrolyte from entering the pressure relief region 2111 at the time of liquid injection. Through the surface and the second surface parallel and level that make protection piece 214 deviate from pressure release boss 212, protection piece 214 can not bulge in the second surface, and protection piece 214 can not extrude the pencil, can not cause pencil stress concentration, has reduced the possibility of pencil damage.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (13)

1. An end cap, comprising:

a cover body having a pressure relief area and an outer surface;

the pressure relief boss surrounds the pressure relief area, and is convexly arranged on the outer surface along the thickness direction of the cover body;

an insulator attached to the outer surface;

and in the thickness direction, the pressure relief boss does not exceed one end, deviating from the outer surface, of the insulating piece in the direction deviating from the outer surface.

2. An end cap according to claim 1, wherein the insulating member has a covering portion covering the outer surface, the covering portion having a first surface and a second surface arranged oppositely in the thickness direction, the first surface facing the outer surface, the covering portion being provided with a through hole penetrating the first surface and the second surface, the pressure relief boss being accommodated in the through hole.

3. An end closure as claimed in claim 2, wherein a surface of said pressure relief boss facing away from said outer surface is closer to said outer surface than said second surface in said thickness direction.

4. An end cap according to claim 2 or claim 3, wherein the end cap includes a protection member, the protection member is disposed on the pressure relief projection and covers the pressure relief area, and the protection member is at least partially disposed in the through hole.

5. The end cap of claim 4, wherein a surface of the protector facing away from the pressure relief boss is flush with the second surface.

6. The end cap according to claim 4, wherein the outer side surface of the protector is disposed in clearance with the hole wall of the through hole.

7. The end cap of claim 1, wherein the end cap includes a protector covering the relief area.

8. An end cap according to claim 7, wherein the protector is provided on the pressure relief projection, and a surface of the protector facing away from the outer surface is flush with an end of the insulator facing away from the outer surface in the thickness direction.

9. An end cap according to claim 1, wherein in the thickness direction, a surface of the pressure relief boss facing away from the outer surface is flush with an end of the insulator facing away from the outer surface.

10. A battery cell, comprising:

an electrode assembly;

a case having an accommodation space with one end open for accommodating the electrode assembly;

the end cap of any of claims 1-9, attached to the housing and closing the opening.

11. A battery, comprising:

a box body;

the battery cell of claim 10, contained within the case.

12. The battery of claim 11, wherein the end cap is disposed on a side of the battery cell adjacent to a bottom wall of the case.

13. An electrical consumer, characterized in that it comprises a battery according to any of claims 11-12 for providing electrical energy.

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