CN220420728U - End cover assembly, battery cell, battery and power utilization device - Google Patents

Abstract

The embodiment of the application provides an end cover assembly, a battery monomer, a battery and an electricity utilization device, and belongs to the technical field of batteries. The end cap assembly includes: the cover plate is provided with a pole mounting hole; the pole is arranged in the pole mounting hole through the first insulating piece sleeved outside the pole; one of the wall surfaces of the pole and the first insulating piece, which are matched with each other, is provided with a first protrusion, the other one of the wall surfaces of the pole and the first insulating piece, which are matched with each other, is provided with a first groove matched with the first protrusion, one of the wall surfaces of the first insulating piece and the pole mounting hole, which are matched with each other, is provided with a second protrusion, and the other one of the wall surfaces of the first insulating piece and the pole mounting hole is provided with a second groove matched with the second protrusion. Through the arrangement of the first protrusion, the first groove, the second protrusion and the second groove, the risk of mutual dislocation between the long pole and the cover plate is effectively reduced, the working performance and the safety protection performance of the battery are optimized, the torsional strength of the pole is enhanced, and the service life of the battery is prolonged.

Description

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

Technical Field

The present application relates to the field of battery technology, and more particularly, to an end cap assembly, a battery cell, a battery, and an electrical device.

Background

In order to improve the reliability of the end cover assembly of the cylindrical battery, in the processing process of the end cover assembly, a riveting connection mode is generally adopted for the pole and the cover plate, in the related art, the pole is riveted by adopting a circular flanging in the end cover assembly of the cylindrical battery, but in the scheme, mutual dislocation is very easy to occur between the pole and the cover plate, the stress intensity of the circular flanging pole is greatly reduced, and the system requirement cannot be met.

Disclosure of Invention

The application provides an end cover assembly, battery monomer, battery and power consumption device to effectively reduce the risk of taking place the dislocation each other under the long-term life cycle between utmost point post and the apron, optimize the working property and the safety protection performance of battery, strengthen the torsional strength of utmost point post, be favorable to prolonging the working life of battery.

In a first aspect, embodiments of the present application provide an end cap assembly comprising:

the cover plate is provided with a pole mounting hole;

the pole is arranged in the pole mounting hole through the first insulating piece sleeved outside the pole; wherein,

one of the wall surfaces of the pole and the first insulating piece, which are matched with each other, is provided with a first bulge, the other one of the wall surfaces of the pole and the first insulating piece, which are matched with each other, is provided with a first groove matched with the first bulge, one of the wall surfaces of the first insulating piece and the pole mounting hole, which are matched with each other, is provided with a second bulge, and the other one of the wall surfaces of the pole and the first insulating piece, which are matched with each other, is provided with a second groove matched with the second bulge.

In the above technical scheme, through the setting of above-mentioned first arch, first recess, protruding and the second recess of second, realize the locking on circumference between apron, first insulating part and the utmost point post, effectively reduce the risk of taking place the dislocation each other between utmost point post and the apron under the long-term life cycle, reduce the battery internal resistance, alleviate the danger that thermal runaway takes place when battery charge and discharge to optimize the working property and the safety protection performance of battery, strengthen the torsional strength of utmost point post simultaneously, thereby be favorable to prolonging the life of battery.

In some embodiments, the pole comprises a pole body, and a first flange and a second flange which are arranged at two ends of the pole body and are turned outwards, the first flange is arranged at the outer side of the cover plate, the first insulating part is clamped between the first flange and the cover plate, the second flange is arranged at the inner side of the cover plate, one of the outer peripheral wall of the pole body and the inner peripheral wall of the first insulating part is provided with a first bulge, the other one of the outer peripheral wall of the pole body and the inner peripheral wall of the first insulating part is provided with a first groove matched with the first bulge, one of the outer peripheral wall of the first insulating part and the inner peripheral wall of the pole mounting hole is provided with a second bulge, and the other one of the outer peripheral wall of the first insulating part and the inner peripheral wall of the pole mounting hole is provided with a second groove matched with the second bulge.

In the above technical scheme, through the position design of the first bulge, the first groove, the second bulge and the second groove, the locking cooperation between the inner peripheral wall of the first insulating piece and the outer peripheral wall of the pole body and the locking cooperation between the outer peripheral wall of the first insulating piece and the inner peripheral wall of the pole mounting hole are realized, so that the bulge structure and the groove structure are additionally arranged on the direct friction surface when each component is twisted, the circumferential locking capacity of the bulge structure and the groove structure is exerted to the greatest extent, and the integral reliability of the end cover assembly is improved.

In some embodiments, the groove structures or the protrusion structures on the inner and outer circumferential walls of the first insulating member are located at the same position in the circumferential direction.

In the technical scheme, through the design that the groove structure or the protruding structure on the inner peripheral wall and the outer peripheral wall of the first insulating piece are located at the same position in the circumferential direction, the assembly difficulty is reduced, the assembly and disassembly operation of the whole end cover assembly is facilitated, the whole wall thickness of the first insulating piece is more uniform, and the self strength of the first insulating piece is improved.

In some embodiments, the inner peripheral wall of the first insulating member is provided with a first groove, and the outer peripheral wall of the first insulating member is provided with a second protrusion, and the first groove and the second protrusion are located at the same position in the circumferential direction.

In the technical scheme, through the concave-convex structural design of the first insulating piece, the pole is effectively prevented from twisting along the circumferential direction, the risk of mutual dislocation between the pole and the cover plate in a long-term service period is reduced, the stress intensity of the pole is enhanced, the service life of the pole is prolonged, the whole wall thickness of the first insulating piece is more uniform, and the self intensity of the first insulating piece is improved.

In some embodiments, the inner peripheral wall of the first insulating member is provided with a first protrusion, and the outer peripheral wall of the first insulating member is provided with a second groove, and the first protrusion and the second groove are located at the same position in the circumferential direction.

In the technical scheme, through the structure design of the first insulating part protruding outwards, the pole is effectively prevented from twisting along the circumferential direction, the risk of mutual dislocation between the pole and the cover plate in a long-term service cycle is reduced, the material consumption of the pole is reduced, the manufacturing cost is reduced, the whole wall thickness of the first insulating part is more uniform, and the self strength of the first insulating part is improved.

In some embodiments, the first protrusions and the first grooves are a plurality of one-to-one correspondence distributed along the circumferential direction;

and/or the number of the groups of groups,

The second protrusions and the second grooves are distributed in a one-to-one correspondence manner along the circumferential direction.

In the above technical scheme, through the design of above-mentioned multiunit unsmooth cooperation structure for a plurality of protruding structures and a plurality of groove structure can distribute and carry out multiple locking in the different positions of utmost point post along circumference, compare in single-layer locking structure, further reduce the risk that takes place the dislocation each other between utmost point post and the apron under the long-term life cycle, promote holistic stability and the reliability of end cover subassembly simultaneously.

In some embodiments, the first protrusion is in transition engagement with the first recess;

and/or the number of the groups of groups,

the second protrusion is in transition fit with the second groove.

In the technical scheme, through the assembly design of the transition fit of the convex structure and the groove structure, abrasion caused by relative sliding of the fit surfaces of the convex structure and the groove structure is reduced, the service lives of the convex structure and the groove structure are prolonged, and meanwhile, the convex structure and the groove structure are in a state of not being too tight and too loose when being matched, and the assembly and the disassembly are easy.

In some embodiments, the outer peripheral wall of the pole is provided with a first protrusion, and in the case that the inner peripheral wall of the pole mounting hole is provided with a second groove, the protruding height of the first protrusion is H1, and the width of the first protrusion is W1, so that: h1 More than or equal to 0.2mm, and W1 more than or equal to 0.2mm.

In the above technical scheme, through the above-mentioned bellied size design for first arch is difficult to break away from first recess under the moment of torsion effect, reduces the relative pivoted probability of utmost point post and first insulating part emergence, and sufficient width can help first arch not to break easily under the moment of torsion effect simultaneously, promotes end cover assembly's practicality and stability.

In some embodiments, the outer peripheral wall of the pole is provided with a first groove, and in the case that the inner peripheral wall of the pole mounting hole is provided with a second protrusion, the protruding height of the second protrusion is H2, and the width of the second protrusion is W2, so that: h2 More than or equal to 0.2mm, and W2 more than or equal to 0.2mm.

In the above technical scheme, through the bellied size design of above-mentioned second for the second is protruding to be difficult to break away from the second recess under the moment of torsion effect, reduces the probability that apron and first insulating part take place relative rotation, and sufficient width can help the second protruding to be difficult to break under the moment of torsion effect simultaneously, promotes end cover assembly's practicality and stability.

In some embodiments, the pole is a solid of revolution.

In a second aspect, embodiments of the present application provide a battery cell, including:

An end cap assembly as in any above.

In the technical scheme, through the mutual cooperation between the cover plate, the first insulating piece, the protruding structure of the pole and the groove structure, the risk of mutual dislocation between the pole and the cover plate under the long-term service cycle is effectively reduced, the risk of thermal runaway during battery charging and discharging is relieved, and therefore the working performance and the safety protection performance of the battery are optimized, and meanwhile the torsional strength of the pole is enhanced, so that the service life of the battery is prolonged.

In a third aspect, embodiments of the present application provide a battery, including:

a plurality of battery cells according to the above scheme.

In the above technical scheme, through the setting of above-mentioned first arch, first recess, protruding and the second recess of second, realize the locking on circumference between apron, first insulating part and the utmost point post, effectively reduce the risk of taking place the dislocation each other between utmost point post and the apron under the long-term life cycle, reduce the battery internal resistance, alleviate the danger that thermal runaway takes place when battery charge and discharge to optimize the working property and the safety protection performance of battery, strengthen the torsional strength of utmost point post simultaneously, thereby be favorable to prolonging the life of battery.

In a fourth aspect, an embodiment of the present application provides an electrical device, including:

The battery according to the above aspect is used for providing electric energy.

In the technical scheme, through the mutual cooperation between the first bulge and the first groove and between the second bulge and the second groove, on the one hand, the relative rotation among the pole, the first insulating piece and the cover plate is effectively prevented, the torsional strength of the round flanging pole is enhanced, the working performance and the safety performance of the battery are optimized, the working life of the battery is prolonged, and the working life of the power utilization device is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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 according to some embodiments of the present application;

fig. 3 is a structural exploded view of a battery cell according to some embodiments of the present application;

FIG. 4 is one of the structural exploded views of the end cap assembly provided in some embodiments of the present application;

FIG. 5 is a schematic structural view of a cover plate according to some embodiments of the present disclosure;

FIG. 6 is a schematic structural view of a first insulating member according to some embodiments of the present disclosure;

FIG. 7 is a schematic illustration of a pole structure according to some embodiments of the present disclosure;

FIG. 8 is a top view of an end cap assembly provided in some embodiments of the present application;

FIG. 9 is a cross-sectional view taken along section A-A of FIG. 8;

FIG. 10 is a cross-sectional view of section B-B of FIG. 8;

FIG. 11 is a second exploded view of the structure of an end cap assembly provided in some embodiments of the present application;

FIG. 12 is a second schematic view of a cover plate according to some embodiments of the present disclosure;

FIG. 13 is a second schematic structural view of a first insulating member according to some embodiments of the present disclosure;

fig. 14 is a second schematic structural view of a pole according to some embodiments of the present disclosure.

Reference numerals:

a vehicle 1, a motor 20, and a controller 30;

a battery 10;

a battery case 11, a first case body 111, and a second case body 112;

cell 12, electrode assembly 122, housing 123, negative end cap assembly 124;

an end cap assembly 121, a first insulator 1212, a second insulator 1214, a transition piece 1215, a seal 1216; a cover plate 1211, a post mounting hole 12111;

A pole 1213, a pole body 12131, a first flange 12132, a second flange 12133;

first projection 12101, first recess 12102, second projection 12103, second recess 12104.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, 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 apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily 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 may be included in at least one embodiment of the application. The appearances of such phrases 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. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.

The term "plurality" as used herein refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

The battery cells mentioned in the embodiments of the present application 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, to which the embodiments of the present application are not limited.

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, or the like. The battery generally includes a case for housing one or more battery cells or a plurality of battery modules. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell includes a case, an electrode assembly, and an electrolyte, and the case is used to accommodate the electrode assembly and the electrolyte. The electrode assembly consists of a positive electrode plate, a negative electrode plate and a separation film. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes out of the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode 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 electrode plate comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes out of the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the high current is passed without fusing, the number of positive electrode lugs is multiple and stacked together, and the number of negative electrode lugs is multiple and stacked together.

The material of the separator may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may be a wound structure or a lamination structure, and the embodiment of the present application is not limited thereto.

In recent years, new energy automobiles have been developed dramatically, and in the field of electric automobiles, a power battery plays an important role as a power source of the electric automobile. The battery is composed of a box body and a plurality of battery monomers accommodated in the box body. The battery is used as a core part of a new energy automobile, and has high requirements on safety and cycle service life.

In a general cylindrical battery, in order to enhance the reliability of an end cover assembly structure, in the processing process of the end cover assembly, a riveting connection mode is generally adopted for a pole and a cover plate, in the related art, a round flanging riveting pole is adopted in the end cover assembly at one end of the cylindrical battery, namely, after the pole penetrates through the cover plate, flanging treatment is carried out on the edge of the round pole by using a tool, a traditional riveting pole is adopted in the end cover assembly at the other end, namely, the pole penetrates through the cover plate and the riveting block to be assembled in an assembly mode of riveting, and the pole and the riveting block are required to be welded after riveting, however, in the scheme, mutual dislocation is very easy to occur between the pole and the cover plate, so that the internal resistance of the battery is increased, and the battery is seriously heated when being charged and discharged, thereby the temperature of the battery is too high, further the working performance and the safety performance of the battery are seriously affected.

Based on above-mentioned consideration, in order to solve the easy torsion of circular turn-ups utmost point post and the lower problem of atress intensity in the end cover subassembly of cylinder battery, this application has designed an end cover subassembly, including apron, first insulating part and utmost point post, the utmost point post is installed in the utmost point post mounting hole through the cover establish the outer first insulating part of utmost point post, and the turn-ups overlap joint of utmost point post is in first insulating part, wherein, through protruding and recess joint cooperation in order to prevent relative rotation between apron and the first insulating part, also through protruding and recess joint cooperation in order to prevent first insulating part and utmost point post relative rotation between first insulating part and the utmost point post.

In the end cover assembly of this kind of structure, through the cooperation between the protruding structure of apron, first insulating part, utmost point post and the groove structure, realize the braking on the circumference between apron, first insulating part and the utmost point post, adopt this kind of structure on the one hand effectively reduce the risk of taking place the dislocation each other between utmost point post and the apron under the long-term life cycle, reduce the battery internal resistance for can not produce excessive temperature rise when battery charge and discharge, thereby promote the working property and the security performance of battery, on the other hand strengthen the torsional strength of circular turn-ups utmost point post, thereby be favorable to prolonging the working life of battery.

The embodiment of the application provides an electricity utilization device using a battery as a power supply, wherein the electricity utilization 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 car, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1.

As shown in fig. 1, a schematic structural diagram of a vehicle 1 according to an embodiment of the present application is shown, where the vehicle 1 may be a fuel-oil vehicle, a gas-fired vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. The motor 20, the controller 30 and the battery 10 may be provided inside the vehicle 1, and the controller 30 is configured to control the battery 10 to supply power to the motor 20. For example, the battery 10 may be provided at the bottom or the head or the tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, e.g. the battery 10 may be used as an operating power source for the vehicle 1, for electrical circuitry of the vehicle 1, e.g. for start-up, navigation and operational power requirements of the vehicle 1. In another embodiment of the present application, the battery 10 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 1.

To meet different power requirements, the battery 10 may include a plurality of battery cells 12, where the plurality of battery cells 12 may be connected in series or parallel or a series-parallel connection, where a series-parallel connection refers to a mixture of series and parallel connections.

As shown in fig. 2, a structural exploded view of the battery 10 according to one embodiment of the present application is shown. The battery 10 includes a case 11 and a plurality of battery cells 12, and the battery cells 12 are accommodated in the case 11. The case 11 is used to provide an assembly space for the battery cells 12, and the case 11 may have various structures. In some embodiments, the case 11 may include a first case body 111 and a second case body 112, the first case body 111 and the second case body 112 being overlapped with each other, the first case body 111 and the second case body 112 together defining an assembly space for accommodating the battery cell 12. The second case body 112 may have a hollow structure with one end opened, the first case body 111 may have a plate-shaped structure, and the first case body 111 covers the open side of the second case body 112, so that the first case body 111 and the second case body 112 together define an assembly space; the first case body 111 and the second case body 112 may be hollow structures each having one side opened, and the open side of the first case body 111 may be closed to the open side of the second case body 112. Of course, the case 11 formed by the first case body 111 and the second case body 112 may be various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 10, the plurality of battery cells 12 may be connected in series or parallel or a series-parallel connection, wherein a series-parallel connection refers to that the plurality of battery cells 12 are connected in series or parallel. The plurality of battery cells 12 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 12 is accommodated in the box 11; of course, the battery 10 may also be a battery module form formed by connecting a plurality of battery cells 12 in series or parallel or series-parallel connection, and then connecting a plurality of battery modules in series or parallel or series-parallel connection to form a whole and be accommodated in the case 11. The battery 10 may also include other structures, for example, the battery 10 may also include a bus bar member for making electrical connection between the plurality of battery cells 12.

Wherein each battery cell 12 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries.

As shown in fig. 3, a structural exploded view of the battery cell 12 according to one embodiment of the present application is shown. The battery cell 12 includes a case 123, an electrode assembly 122, and a positive and negative electrode end cap assembly 124, both ends of the case 123 have openings, the electrode assembly 122 is disposed in the case 123, the positive and negative electrode end cap assemblies 124 block the openings of the case 123, and the posts of the positive and negative electrode end cap assemblies 124 are electrically connectable with the tabs of the electrode assembly 122.

The battery cell 12 may be a cylindrical battery cell, and the positive electrode end cover assembly may be an end cover assembly 121 designed in the application.

According to some embodiments of the present application, as shown in fig. 4-14, embodiments of the present application provide an end cap assembly 121, the end cap assembly 121 comprising: a cap plate 1211, a first insulator 1212, and a post 1213.

As shown in fig. 4 and 9-11, the cover plate 1211 may be provided with a post mounting hole 12111; the pole 1213 may be mounted to the pole mounting hole 12111 through a first insulator 1212 that is sleeved outside the pole 1213; wherein, one of the wall surfaces of the pole 1213 and the first insulating member 1212 which are engaged with each other may be provided with a first protrusion 12101, the other may be provided with a first recess 12102 engaged with the first protrusion 12101, one of the wall surfaces of the first insulating member 1212 and the pole mounting hole 12111 which are engaged with each other may be provided with a second protrusion 12103, and the other may be provided with a second recess 12104 engaged with the second protrusion 12103.

In this embodiment, as shown in fig. 4 and 11, the first insulating member 1212 may be sleeved outside the pole 1213, the first insulating member 1212 may be mounted in the pole mounting hole 12111, the first insulating member 1212 may be in an inverted stepped truncated cone shape, the first insulating member 1212 may form a stepped surface, a flange of the pole 1213 may overlap the stepped surface, the end cap assembly 121 may further include a second insulating member 1214, a through-piece 1215 and a sealing member 1216, the pole 1213 may be mounted on the through-piece 1215, the pole 1213 may penetrate the second insulating member 1214, and the cover plate 1211 may be positioned between the first insulating member 1212 and the second insulating member 1214, and the sealing member 1216 may be elastically compressed between the pole 1213, the first insulating member 1212 and the cover plate 1211.

The end cap assembly 121 may have at least one of the following structural forms:

first, as shown in fig. 10, the first protrusion 12101 and the second recess 12104 may be provided at the inner circumferential wall and the outer circumferential wall of the first insulating member 1212, the first recess 12102 may be provided at the outer circumferential wall of the pole 1213, and the second protrusion 12103 may be provided at the inner circumferential wall of the pole mounting hole 12111, respectively; in the case where the pole 1213 includes a pole body 12131, and first and second flanges 12132 and 12133 provided at both ends of the pole body 12131 and turned outwardly, the first recess 12102 may be provided at the outer circumferential wall of the pole body 12131.

Second, as shown in fig. 1, the first recess 12102 and the second protrusion 12103 may be provided at the inner circumferential wall and the outer circumferential wall of the first insulating member 1212, the first protrusion 12101 may be provided at the outer circumferential wall of the pole 1213, and the second recess 12104 may be provided at the inner circumferential wall of the pole mounting hole 12111, respectively; in the case where the pole 1213 includes a pole body 12131, and first and second flanges 12132 and 12133 provided at both ends of the pole body 12131 and turned outwardly, the first protrusion 12101 may be provided at the outer circumferential wall of the pole body 12131.

Third, the pole 1213 may include a pole body 12131, and a first flange 12132 and a second flange 12133 disposed at two ends of the pole body 12131 and turned outward, the first flange 12132 may be disposed at an outer side of the cover plate 1211, the first insulating member 1212 may be clamped between the first flange 12132 and the cover plate 1211, the second flange 12133 may be disposed at an inner side of the cover plate 1211, the first protrusion 12101 and the first groove 12102 may be disposed at a lower surface of the first flange 12132 and an upper sidewall of the first insulating member 1212, respectively, and the second protrusion 12103 and the second groove 12104 may be disposed at a lower sidewall of the first insulating member 1212 and an outer circumferential edge of the pole mounting hole 12111, respectively.

Fourth, the pole 1213 may include a pole body 12131, and a first flange 12132 and a second flange 12133 disposed at two ends of the pole body 12131 and turned outward, the first flange 12132 may be disposed at an outer side of the cover plate 1211, and the first insulating member 1212 may be clamped between the first flange 12132 and the cover plate 1211, the second flange 12133 may be disposed at an inner side of the cover plate 1211, the first protrusion 12101 and the first groove 12102 may be disposed at an upper surface of the second flange 12133 and a lower sidewall of the first insulating member 1212, respectively, and the second protrusion 12103 and the second groove 12104 may be disposed at a lower sidewall of the first insulating member 1212 and an outer circumferential edge of the pole mounting hole 12111, respectively.

Fifth, the first insulating element 1212 may be provided with a first protrusion 12101 and a second protrusion 12103, the post 1213 may be provided with a first recess 12102, and the cap plate 1211 may be provided with a second recess 12104.

Sixth, the first insulating element 1212 may be provided with a first recess 12102 and a second recess 12104, the post 1213 may be provided with a first protrusion 12101, and the cover plate 1211 may be provided with a second protrusion 12103.

In actual implementation, as shown in fig. 4 and fig. 9-11, in the process of assembling the end cover assembly 121, the first end of the pole 1213 may be mounted on the transfer piece 1215, the pole 1213 may penetrate through the second insulator 1214 and may penetrate through the cover plate 1211 through the pole mounting hole 12111, the first insulator 1212 and the seal 1216 may be sleeved on the pole 1213, the seal 1216 may be elastically compressed between the pole 1213, the first insulator 1212 and the cover plate 1211, the first insulator 1212 and the pole 1213 may be locked circumferentially through the locking fit between the first protrusion 12101 and the first groove 12102, the first insulator 1212 and the cover plate 1211 may be locked circumferentially through the locking fit between the second protrusion 12103 and the second groove 12104, and finally the second end of the pole 1213 may be riveted by using a tool, so that the second end of the pole 1213 forms a flange, and the flange of the pole 1213 abuts against the step surface of the first insulator 1212, the first insulator 1212 may be prevented from being disturbed by the first protrusion 1212, and the first insulator 1212 may rotate relative to the first insulator 12101 and the first insulator 12102, and the first insulator 1213 may be prevented from rotating relative to the first insulator 1211 and the first insulator 12102, and the first insulator 1213 may rotate relative to the first insulator 1211.

According to the end cover assembly 121 provided by the embodiment of the application, through the arrangement of the first protrusion 12101, the first groove 12102, the second protrusion 12103 and the second groove 12104, the cover plate 1211, the first insulating piece 1212 and the pole 1213 are locked in the circumferential direction, so that the risk of mutual dislocation between the pole 1213 and the cover plate 1211 in a long-term service period is effectively reduced, the internal resistance of the battery 10 is reduced, the risk of thermal runaway during charging and discharging of the battery 10 is relieved, the working performance and the safety protection performance of the battery 10 are optimized, and the torsional strength of the pole 1213 is enhanced, so that the service life of the battery 10 is prolonged.

According to some embodiments of the present application, as shown in fig. 4-14, the post 1213 may include a post body 12131, and a first flange 12132 and a second flange 12133 provided at both ends of the post body 12131 and turned outward, the first flange 12132 may be provided at an outer side of the cover plate 1211, and the first insulating member 1212 may be clamped between the first flange 12132 and the cover plate 1211, the second flange 12133 may be provided at an inner side of the cover plate 1211, one of an outer circumferential wall of the post body and an inner circumferential wall of the first insulating member 1212 may be provided with a first protrusion 12101, the other may be provided with a first groove 12102 engaged with the first protrusion 12101, one of an outer circumferential wall of the first insulating member 1212 and an inner circumferential wall of the post mounting hole 12111 may be provided with a second protrusion 12103, and the other may be provided with a second groove 12104 engaged with the second protrusion 12103.

In this embodiment, the first protrusion 12101 and the second protrusion 12103 may be rectangular parallelepiped, cylindrical, or pyramidal, etc., and illustratively, in fig. 4 and 14, the first protrusion 12101 and the second protrusion 12103 are rectangular parallelepiped, and correspondingly, the first groove 12102 and the second groove 12104 are also rectangular parallelepiped. Circumferential locking can be achieved between the inner peripheral wall of the first insulating element 1212 and the outer peripheral wall of the pole body through the snap fit of the first protrusion 12101 and the first groove 12102, and circumferential locking can be achieved between the outer peripheral wall of the first insulating element 1212 and the inner peripheral wall of the pole mounting hole 12111 through the snap fit of the second protrusion 12103 and the second groove 12104.

According to the end cover assembly 121 provided by the embodiment of the application, through the above-mentioned position designs of the first protrusion 12101, the first groove 12102, the second protrusion 12103 and the second groove 12104, locking cooperation between the inner peripheral wall of the first insulating element 1212 and the outer peripheral wall of the pole body and locking cooperation between the outer peripheral wall of the first insulating element 1212 and the inner peripheral wall of the pole mounting hole 12111 are achieved, so that the protrusion structure and the groove structure are additionally arranged on the direct friction surface when each member is twisted, and circumferential locking capability of the protrusion structure and the groove structure is exerted to the greatest extent, thereby improving the overall reliability of the end cover assembly 121.

According to some embodiments of the present application, as shown in fig. 4 and 11, the groove structures or the protrusion structures on the inner and outer circumferential walls of the first insulating element 1212 may be located at the same position in the circumferential direction.

In this embodiment, as shown in fig. 4 and 11, in the case where the first projection 12101 is provided to the inner peripheral wall of the first insulating member 1212 and the second recess 12104 is provided to the outer peripheral wall of the first insulating member 1212, the first projection 12101 and the second recess 12104 may be located at the same position in the circumferential direction, in other words, projections of the first projection 12101 and the second recess 12104 on the vertical plane may coincide; in the case where the first recess 12102 is provided in the inner peripheral wall of the first insulating member 1212 and the second projection 12103 is provided in the outer peripheral wall of the first insulating member 1212, the first recess 12102 and the second projection 12103 may be located at the same position in the circumferential direction at this time, in other words, projections of the first recess 12102 and the second projection 12103 on the vertical plane may coincide.

In other embodiments, in the case where the first projection 12101 is provided on the inner peripheral wall of the first insulating member 1212 and the second projection 12103 is provided on the outer peripheral wall of the first insulating member 1212, the first projection 12101 and the second projection 12103 may be located at the same position in the circumferential direction, in other words, the projections of the first projection 12101 and the second projection 12103 on the vertical surface may coincide; in the case where the first groove 12102 is provided in the inner peripheral wall of the first insulating member 1212 and the second groove 12104 is provided in the outer peripheral wall of the first insulating member 1212, the first groove 12102 and the second groove 12104 may be located at the same position in the circumferential direction, in other words, projections of the first groove 12102 and the second groove 12104 on the vertical plane may coincide.

According to the end cover assembly 121 provided by the embodiment of the application, through the design that the groove structure or the protruding structure on the inner and outer peripheral walls of the first insulating element 1212 is located at the same position in the circumferential direction, the assembly difficulty is reduced, the assembly and disassembly operation of the whole end cover assembly 121 is facilitated, meanwhile, the whole wall thickness of the first insulating element 1212 is more uniform, and the self strength of the first insulating element 1212 is improved.

According to some embodiments of the present application, as shown in fig. 4 to 10, the inner circumferential wall of the first insulating element 1212 may be provided with a first groove 12102, and the outer circumferential wall of the first insulating element 1212 may be provided with a second protrusion 12103, and the first groove 12102 and the second protrusion 12103 may be located at the same position in the circumferential direction.

In actual implementation, as shown in fig. 4-10, the first groove 12102 of the inner circumferential wall of the first insulator 1212 may be in locking engagement with the first protrusion 12101 of the outer circumferential wall of the pole 1213, and the second protrusion 12103 of the outer circumferential wall of the first insulator 1212 may be in locking engagement with the second groove 12104 of the inner circumferential wall of the pole mounting hole 12111, where the projections of the first protrusion 12101, the first groove 12102, the second protrusion 12103, and the second groove 12104 on the vertical plane may coincide.

According to the end cover assembly 121 provided by the embodiment of the application, through the concave and convex structural design of the first insulating element 1212, the pole 1213 is effectively prevented from twisting along the circumferential direction, the risk of mutual dislocation between the pole 1213 and the cover plate 1211 in a long-term service period is reduced, meanwhile, the stress intensity of the pole 1213 is enhanced, the service life of the pole 1213 is prolonged, the integral wall thickness of the first insulating element 1212 is more uniform, and the self intensity of the first insulating element 1212 is improved.

According to some embodiments of the present application, as shown in fig. 11 to 14, the inner circumferential wall of the first insulating element 1212 may be provided with a first protrusion 12101, and the outer circumferential wall of the first insulating element 1212 may be provided with a second recess 12104, and the first protrusion 12101 and the second recess 12104 may be located at the same position in the circumferential direction.

In actual implementation, as shown in fig. 11-14, the first protrusion 12101 of the inner circumferential wall of the first insulator 1212 may be in locking engagement with the first recess 12102 of the outer circumferential wall of the pole 1213, and the second recess 12104 of the outer circumferential wall of the first insulator 1212 may be in locking engagement with the second protrusion 12103 of the inner circumferential wall of the pole mounting hole 12111, where the projections of the first protrusion 12101, the first recess 12102, the second protrusion 12103, and the second recess 12104 on the vertical plane may coincide.

According to the end cover assembly 121 provided by the embodiment of the application, through the above-mentioned structure design of the first insulating element 1212 protruding from the outside, the pole 1213 is effectively prevented from twisting along the circumferential direction, the risk of mutual dislocation between the pole 1213 and the cover plate 1211 in a long-term service period is reduced, meanwhile, the material consumption of the pole 1213 is reduced, the manufacturing cost is reduced, the overall wall thickness of the first insulating element 1212 is more uniform, and the self strength of the first insulating element 1212 is improved.

According to some embodiments of the present application, as shown in fig. 4-7 and 11-14, the first protrusions 12101 and the first recesses 12102 may be a one-to-one corresponding plurality distributed along the circumferential direction; and/or, the second protrusions 12103 and the second recesses 12104 may be a one-to-one correspondence plurality distributed in the circumferential direction.

In this embodiment, as shown in fig. 4 to 7 and 11 to 14, the first protrusions 12101 and the first recesses 12102 are 2 one-to-one corresponding to each other distributed in the circumferential direction, and the second protrusions 12103 and the second recesses 12104 are 2 one-to-one corresponding to each other distributed in the circumferential direction.

In some embodiments, first protrusions 12101 and first recesses 12102 are 2 in one-to-one correspondence distributed in the circumferential direction.

In other embodiments, the second protrusions 12103 and the second recesses 12104 are 2 in one-to-one correspondence distributed in the circumferential direction.

In still other embodiments, the first protrusions 12101 and the first recesses 12102 are 3 one-to-one correspondence distributed in the circumferential direction, and the second protrusions 12103 and the second recesses 12104 are 3 one-to-one correspondence distributed in the circumferential direction.

In other embodiments, the first protrusions 12101 and the first recesses 12102 are 4 one-to-one correspondence distributed in the circumferential direction, and the second protrusions 12103 and the second recesses 12104 are 4 one-to-one correspondence distributed in the circumferential direction.

In actual execution, as shown in fig. 4 to 7 and 11 to 14, in the case where the first protrusion 12101 is provided at the inner peripheral wall of the first insulating member 1212 and the second recess 12104 is provided at the outer peripheral wall of the first insulating member 1212, the plurality of first protrusions 12101 may be arranged at intervals in the circumferential direction at the inner peripheral wall of the first insulating member 1212, correspondingly, the plurality of first recesses 12102 may be arranged at intervals in the circumferential direction at the outer peripheral wall of the pole 1213, the plurality of second recesses 12104 may be arranged at intervals in the circumferential direction at the outer peripheral wall of the first insulating member 1212, and correspondingly, the plurality of second protrusions 12103 may be arranged at intervals in the circumferential direction at the inner peripheral wall of the pole mounting hole 12111; in the case where the first groove 12102 is provided at the inner peripheral wall of the first insulating member 1212 and the second protrusion 12103 is provided at the outer peripheral wall of the first insulating member 1212, the plurality of first grooves 12102 may be arranged at intervals in the circumferential direction at the inner peripheral wall of the first insulating member 1212, correspondingly, the plurality of first protrusions 12101 may be arranged at intervals in the circumferential direction at the outer peripheral wall of the post 1213, the plurality of second protrusions 12103 may be arranged at intervals in the circumferential direction at the outer peripheral wall of the first insulating member 1212, and correspondingly, the plurality of second grooves 12104 may be arranged at intervals in the circumferential direction at the inner peripheral wall of the post mounting hole 12111.

According to the end cover assembly 121 provided in the embodiment of the present application, through the design of the above-mentioned multiple groups of concave-convex matching structures, multiple protruding structures and multiple groove structures can be distributed at different positions of the pole 1213 along the circumferential direction to perform multiple locking, and compared with a single-layer locking structure, the risk of occurrence of mutual dislocation between the pole 1213 and the cover plate 1211 in a long-term service cycle is further reduced, and meanwhile, the stability and reliability of the whole end cover assembly 121 are improved.

According to some embodiments of the present application, first protrusion 12101 and first recess 12102 may be transition fit; and/or, the second protrusion 12103 and the second recess 12104 may be transition fitted.

In this embodiment, first protrusion 12101 is in transition with first recess 12102 and second protrusion 12103 is in transition with second recess 12104.

In some embodiments, first protrusion 12101 is transition fit with first recess 12102.

In other embodiments, second protrusion 12103 is transition fit with second recess 12104.

In yet other embodiments, first protrusion 12101 is interference fit with first recess 12102 and second protrusion 12103 is interference fit with second recess 12104.

In actual implementation, during assembly of the end cap assembly 121, tolerance bands of the first protrusion 12101 and the first groove 12102 overlap each other, and the first protrusion 12101 and the first groove 12102 may have a tolerance variation or an interference variation in cooperation, and the variation is small; the tolerance bands of the second protrusion 12103 and the second groove 12104 overlap each other, and the second protrusion 12103 and the second groove 12104 may have a tolerance variation or an interference variation in cooperation, and the variation is small.

According to the end cover assembly 121 provided by the embodiment of the application, through the assembly design of the transition fit of the convex structure and the groove structure, the abrasion caused by the relative sliding of the matching surfaces of the convex structure and the groove structure is reduced, the service lives of the convex structure and the groove structure are prolonged, and meanwhile, the convex structure and the groove structure are in a state of not being too tight and not too loose when being matched, so that the assembly and the disassembly are easy.

According to some embodiments of the present application, as shown in fig. 7, in the case where the outer circumferential wall of the pole 1213 is provided with the first protrusion 12101 and the inner circumferential wall of the pole mounting hole 12111 is provided with the second recess 12104, the protrusion height of the first protrusion 12101 is H1, and the width of the first protrusion 12101 is W1, satisfying: h1 More than or equal to 0.2mm, and W1 more than or equal to 0.2mm.

Preferably, H1 is 0.5mm or more and W1 is 2mm or more, for example, in some embodiments, the protrusion height H1 of the first protrusion 12101 is 0.8mm and the width W1 of the first protrusion 12101 is 2.5mm.

According to the end cover assembly 121 provided in the embodiment of the present application, through the above-mentioned dimension design of the first protrusion 12101, the first protrusion 12101 is not easily separated from the first groove 12102 under the action of torque, so that the probability of relative rotation between the pole 1213 and the first insulating member 1212 is reduced, and meanwhile, the sufficient width can help the first protrusion 12101 not easily break under the action of torque, so as to improve the practicality and stability of the end cover assembly 121.

According to some embodiments of the present application, as shown in fig. 12, in the case where the outer circumferential wall of the pole 1213 is provided with the first groove 12102 and the inner circumferential wall of the pole mounting hole 12111 is provided with the second protrusion 12103, the protrusion height of the second protrusion 12103 is H2, and the width of the second protrusion 12103 is W2, satisfying: h2 More than or equal to 0.2mm, and W2 more than or equal to 0.2mm.

Preferably, H2 is 0.5mm or more and W2 is 2mm or more, for example, in some embodiments, the protrusion height H2 of the second protrusion 12103 is 1mm and the width W2 of the second protrusion 12103 is 2.2mm.

According to the end cover assembly 121 provided in the embodiment of the present application, due to the size design of the second protrusion 12103, the second protrusion 12103 is not easily separated from the second groove 12104 under the action of torque, so that the probability of relative rotation between the cover plate 1211 and the first insulating member 1212 is reduced, and meanwhile, the sufficient width can help the second protrusion 12103 not easily break under the action of torque, so as to improve the practicality and stability of the end cover assembly 121.

According to some embodiments of the present application, as shown in fig. 7 and 14, pole 1213 is a body of revolution.

In the present embodiment, as shown in fig. 7 and 14, the burring pole 1213 having a cylindrical shape is extremely liable to twist when receiving an external disturbance, so that the reliability of the connection between the pole 1213 and the tab of the electrode assembly is greatly affected.

With the end cover assembly 121 with the structure, through the mutual matching between the first protrusion 12101 and the first groove 12102 and between the second protrusion 12103 and the second groove 12104, on one hand, relative rotation among the pole 1213, the first insulating part 1212 and the cover plate 1211 is effectively prevented, the torsional strength of the round flanging pole 1213 is enhanced, and the working performance and the safety performance of the battery 10 are optimized, so that the working life of the battery 10 is prolonged.

According to some embodiments of the present application, as shown in fig. 4 and fig. 9-11, in the process of assembling the end cover assembly 121, a first end of the pole 1213 may be mounted on the adapter plate 1215, the pole 1213 may penetrate through the second insulator 1214 and may penetrate through the cover plate 1211 through the pole mounting hole 12111, the first insulator 1212 and the seal 1216 may be sleeved on the pole 1213, and the seal 1216 may be elastically compressed between the pole 1213, the first insulator 1212 and the cover plate 1211, a circumferential locking may be achieved between an inner circumferential wall of the first insulator 1212 and an outer circumferential wall of the pole 1213 through a snap-fit of a plurality of first protrusions 12101 and a plurality of first grooves 12102, at this time, a circumferential locking may be achieved between an outer circumferential wall of the first insulator 1212 and an inner circumferential wall of the pole mounting hole 12111 of the cover plate 1211 through a snap-fit of a plurality of second protrusions 12103 and a plurality of second grooves 12104, and finally, the second end of the seal 1216 may be press-riveted to the second end of the pole 1213, so that the second circumferential wall 1212 and the first circumferential wall 1212 of the second circumferential wall 1212 may be disposed at the same position as the first protrusion 12101 and the first insulation groove 12101 are disposed in the same position as the first protrusion 12101; in the case where the first groove 12102 is provided in the inner peripheral wall of the first insulating element 1212 and the second protrusion 12103 is provided in the outer peripheral wall of the first insulating element 1212, the first groove 12102 and the second protrusion 12103 may be located at the same position in the circumferential direction.

In the case that the end cap assembly 121 is subject to external disturbance, the first protrusion 12101 and the first recess 12102 may circumferentially abut against the first insulator 1212 and the post 1213 to prevent relative rotation between the first insulator 1212 and the post 1213, and the second protrusion 12103 and the second recess 12104 may circumferentially abut against the first insulator 1212 and the cover plate 1211 to prevent relative rotation between the first insulator 1212 and the cover plate 1211.

According to some embodiments of the present application, there is also provided a battery cell 12, the battery cell 12 including an end cap assembly 121 of any of the above aspects.

According to some embodiments of the present application, there is also provided a battery 10, the battery 10 including a plurality of battery cells 12.

According to some embodiments of the present application, there is also provided an electric device, including the battery 10 of the above aspect, the battery 10 being configured to provide electric energy to the electric device.

It should be noted that, without conflict, the embodiments and features of the embodiments in the present application may be combined with each other.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (13)

1. An end cap assembly, comprising:

the cover plate is provided with a pole mounting hole;

the pole is arranged in the pole mounting hole through the first insulating piece sleeved outside the pole; wherein,

one of the wall surfaces of the pole and the first insulating piece, which are matched with each other, is provided with a first bulge, and the other wall surface is provided with a first groove matched with the first bulge; one of the wall surfaces of the first insulating piece and the pole mounting hole, which are matched with each other, is provided with a second protrusion, and the other wall surface is provided with a second groove matched with the second protrusion.

2. The end cover assembly according to claim 1, wherein the pole includes a pole body, and a first flange and a second flange which are provided at both ends of the pole body and are turned outward, the first flange is provided at an outer side of the cover plate, and the first insulating member is clamped between the first flange and the cover plate, the second flange is provided at an inner side of the cover plate, one of an outer peripheral wall of the pole body and an inner peripheral wall of the first insulating member is provided with a first protrusion, the other one is provided with a first groove which is engaged with the first protrusion, one of an outer peripheral wall of the first insulating member and an inner peripheral wall of the pole mounting hole is provided with a second protrusion, and the other one is provided with a second groove which is engaged with the second protrusion.

3. The end cap assembly of claim 2, wherein the groove structures or the projection structures on the inner and outer peripheral walls of the first insulator are located at the same location in the circumferential direction.

4. The end cap assembly of claim 2, wherein the inner peripheral wall of the first insulator is provided with a first groove and the outer peripheral wall of the first insulator is provided with a second protrusion, the first groove and the second protrusion being located at the same position in the circumferential direction.

5. The end cap assembly of claim 2, wherein the inner peripheral wall of the first insulator is provided with a first protrusion and the outer peripheral wall of the first insulator is provided with a second groove, the first protrusion and the second groove being located at the same position in the circumferential direction.

6. The end cap assembly of any one of claims 1-5, wherein the first protrusion and the first groove are a plurality of one-to-one correspondence distributed along a circumferential direction;

and/or the number of the groups of groups,

the second protrusions and the second grooves are distributed in a one-to-one correspondence manner along the circumferential direction.

7. The end cap assembly of any one of claims 1-5, wherein the first projection is transition fit with the first recess;

And/or the number of the groups of groups,

the second protrusion is in transition fit with the second groove.

8. The end cap assembly according to any one of claims 2 to 5, wherein in the case where the outer peripheral wall of the post is provided with a first protrusion and the inner peripheral wall of the post mounting hole is provided with a second groove, the protrusion height of the first protrusion is H1, and the width of the first protrusion is W1, satisfying: h1 More than or equal to 0.2mm, and W1 more than or equal to 0.2mm.

9. The end cap assembly according to any one of claims 2 to 5, wherein in the case where the outer peripheral wall of the post is provided with a first groove and the inner peripheral wall of the post mounting hole is provided with a second protrusion, the protrusion height of the second protrusion is H2, and the width of the second protrusion is W2, satisfying: h2 More than or equal to 0.2mm, and W2 more than or equal to 0.2mm.

10. The end cap assembly of any one of claims 1-5, wherein the pole is a solid of revolution.

11. A battery cell, comprising:

the end cap assembly of any one of claims 1-10.

12. A battery, comprising:

a plurality of the battery cells of claim 11.

13. An electrical device, comprising:

The battery of claim 12, for providing electrical energy.