CN217641682U - Battery cell, battery and power consumption device - Google Patents

Abstract

The application provides a battery monomer, a battery and an electric device; wherein, novel battery monomer structure include: the electrode assembly, the shell, the end cover, the sealing structure and the current collecting disc assembly; the current collecting plate assembly comprises a positive current collecting plate and a negative current collecting plate, and the current collecting plate assembly realizes direct electrical connection of the end face of the pole group, the pole and the top cover and the large face of the bottom cover and the current collecting plate in a mode of coating the colloid and the two sides of the current collecting plate; the sealing structure is used for increasing the stability of each component in the battery unit; the end cover is used for sealing the shell; the electrode assembly is hermetically arranged in the shell and is bonded with the upper end and the lower end of the shell through conductive adhesive; the colloid adopts matrix resin and conductive particles; the method and the device can simplify the steps of the production process, and solve the safety problems of short service life, liquid leakage and the like of the battery caused by short circuit of the electrode assembly.

Description

Battery cell, battery and power consumption device

Technical Field

The application relates to the technical field of power batteries, in particular to a battery monomer, a battery and an electric device.

Background

Along with the development and progress of new energy automobile technology, higher requirements are provided for energy density, cycle life, safety and reliability of a power battery; the existing cylindrical power battery has complex structure, various parts and complex production process, and has certain safety risk

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present application provides a battery cell, a battery and an electric device, which can simplify the production process steps and reduce the short circuit, thereby causing the safety problems of short battery service life, liquid leakage and the like.

In a first aspect, the present application provides a battery cell comprising: a case for housing the electrode assembly; the end covers are covered and arranged at the upper ends of the openings at the two ends of the shell; an electrode assembly disposed in the case; the sealing structure is used for fixedly connecting the shell and the battery monomer; and the current collecting plate component is arranged between two ends of the electrode component and the end cover, and is fixedly connected with the end cover and the shell through colloid.

In the scheme, the colloid is used as a new connection scheme to replace the mode that the inherent high-temperature melting colloid is fixedly connected with the end cover and the shell, the original battery shell connection process is simplified, different parts in the battery monomer are connected together through the colloid, and the shell of the battery monomer can be combined and connected with the parts.

In some embodiments, the current collecting plate assembly comprises a positive current collecting plate and an negative current collecting plate, and two end surfaces of the electrode assembly are respectively connected with the positive current collecting plate and the negative current collecting plate; the colloid is coated on two end faces of the anode current collecting disc and the cathode current collecting disc.

In the above scheme, the colloid is used as a main substance for connection and fixation, and the colloid is coated on two end faces of the positive current collecting disc and the negative current collecting disc respectively in the battery, so that the surfaces of two ends of the current collecting discs are covered, and the current transmitted from the electrode assembly can be distributed more uniformly.

In some embodiments, the adhesive is a conductive adhesive.

In the above scheme, the colloid used in the cylindrical battery monomer connection structure is a conductive adhesive, and the conductive adhesive can be configured as a conductive colloid, a conductive adhesive tape or any colloid capable of generating a conductive effect and an adhesion effect; the conductive adhesive is respectively coated at two ends of the anode current collecting disc and the cathode current collecting disc, and can help to fix the current collecting disc, the electrode assembly and the end cover; the positive current collecting disc and the negative current collecting disc can be coated on two end faces of the current collecting disc through conductive adhesive, and can generate a better conductive transmission effect with the end cover in the process of combining the end cover and the shell, so that the current transmission power in the single battery is improved.

In some embodiments, the header assembly is fixedly connected to the end cap and the housing by electrical connections.

In the scheme, the positive current collecting plate and the negative current collecting plate in the current collecting plate assembly are coated on two end faces of the current collecting plate through the conductive adhesive, so that the current collecting plate assembly can be electrically connected with the shell and the end cover, and meanwhile, the connection stability between the current collecting plate assembly and the end cover and between the current collecting plate assembly and the shell is enhanced.

In some embodiments, the sealing structure includes a sealing nail, a positive electrode pole, a sealing washer, an insulating plastic washer, a positive current collecting plate, an electrode assembly, a negative current collecting plate, and a bottom cover, which are sequentially connected from top to bottom through a conductive adhesive.

In the above scheme, the sealing structure comprises a sealing nail, a positive pole column, a sealing washer, an insulating plastic washer and the electrode assembly which are connected at the upper end of the shell through conductive adhesive, the electrode assembly and the bottom cover are connected at the lower end of the shell, and the single battery can be sealed; after the single battery adopts the sealing structure, the air tightness of the single battery can be improved, and the connection among all parts in the single battery is enhanced.

In some embodiments, the conductive paste comprises a matrix resin and conductive particles.

In the above scheme, the adhesion of the matrix resin bonds the conductive particles together to form a current-carrying loop, thereby achieving conductive connection with the attached matrix resin material. The conductive adhesive mentioned in the scheme can be tightly bonded with the metal surface; the matrix resin has certain elasticity, can improve the shock resistance of the battery, and keeps the current collecting disc, the electrode assembly and the shell to be tightly and electrically connected.

In some embodiments, the conductive adhesive is electrically connected with the current collecting plate assembly to form a conductive layer, and the thickness of the conductive layer is 0.05mm-0.55mm.

In the scheme, the conductive adhesive is used as a medium, and is coated on two end faces of the current collecting disc to form a conductive layer; meanwhile, as the elastic matrix resin is adopted as the main material of the conductive adhesive, the conductive layer can help the electrode assembly buffer certain pressure; the conductive layer within the range of the thickness of the preset value can generate better current conduction effect on the existing electrified loop.

In some embodiments, the housing is cylindrical or prismatic.

In the above solution, the housing of the battery cell may have a cylindrical or prismatic shape, and the specific shape of the housing may be determined according to the surrounding formation of the housing.

In some embodiments, the battery cell includes a case electrode assembly, an end cap, and a sealing structure; the end cover comprises a top cover and a bottom cover, and the top cover and the bottom cover are respectively positioned at openings at two ends of the shell and are used for covering the shell.

In the scheme, the end cover is divided into the top cover and the bottom cover, the cover is arranged at the openings at the two ends of the shell, and the shell can be sealed.

In some embodiments, the electrode assembly further includes tabs having opposite ends extending outwardly in the direction of the opening of the case and connected to the end caps.

In the scheme, two ends of the electrode assembly contain two lugs with opposite polarities, the two lugs are connected with the end cover, and electric energy generated in the electrode assembly is led out through the lugs.

In a second aspect, the present application also provides a battery including at least one of the battery cells mentioned in the above embodiments.

In the above scheme, the present application further provides a battery, which includes one or more of the battery cells mentioned in the above embodiments, and the battery cell provides electric energy for the battery.

In a third aspect, the present application further provides an electric device, including the battery mentioned in the above embodiments, wherein the battery is used for providing electric energy.

In the above scheme, the electric device includes one or more batteries, and the electric device can provide electric energy to corresponding equipment.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

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

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

fig. 2 is an exploded view of a battery pack according to some embodiments of the present application;

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

fig. 4 is a side view of a battery cell according to some embodiments of the present application;

FIG. 5 is a schematic structural view of a positive current collecting plate and a conductive paste according to some embodiments of the present disclosure;

fig. 6 is a schematic structural view of an anode current collecting plate and a conductive paste according to some embodiments of the present disclosure.

In the drawings, the figures are not drawn to scale.

Description of the labeling: vehicle-1000; a battery-100; controller-200; a motor-300; a box body-13; 1-sealing nails; 2-positive pole column; 3-sealing a gasket; 4-insulating plastic gaskets; 5-positive pole current collecting disc; 6-conductive adhesive; 6 a-conductive adhesive of the positive electrode current collecting plate; 6 b-conducting resin of a negative electrode current collecting plate; 7-an electrode assembly; 8-negative current collecting plate; 9-end cap; 9 a-a top cover; 9 b-a bottom cover; 10-a housing; 11-a first part; 12-a second part; 14-a battery cell; 15-conductive layer.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

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

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

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

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

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

With the popularization of new energy power batteries, various types of new energy power batteries have been applied to different aspects of life; the cylindrical battery is one of the commonly used batteries, has high market popularization rate and mature process; the inventor notices that the production process of the current cylindrical battery is complex, needs to be divided into a plurality of steps for high-temperature melting and curing, and the structure of the current cylindrical battery is relatively complex, the top part is redundant, and the risk of glue overflow is easily generated by coating conductive glue on the end surfaces of a current collecting disc and a pole by a conventional process, so that short circuit is caused; in the using process, liquid leakage is easy to occur and potential safety hazards exist, so that the service life of the battery is short, and the cost is high; meanwhile, the pole end face of the existing cylindrical battery is subjected to laser welding with the current collecting disc after high-frequency oscillation flattening and shaping, but due to the characteristic of laser welding, the current collecting disc and the pole end face can only be connected through local spot welding, so that current is unevenly distributed on the current collecting disc and the pole group end face, and the power performance of the battery is influenced; the current collecting plate and the adapter plate/bottom shell are also connected in a spot welding mode, and the problems of uneven current distribution and large contact resistance exist.

Based on the generation of the problems, in order to solve the problems that the current distribution generated by welding the current collecting disc and the end face of the pole column in the production process of the cylindrical battery is uneven, and the power and the resistance of the battery are influenced, the inventor designs a single battery, the electric connection between the pole column and the current collecting disc is generated by using a novel conductive adhesive coated on the two sides of the current collecting disc, and the current collecting disc is fixedly connected with the end cover of the cylindrical battery by using the conductive adhesive, so that the production process of the conventional cylindrical battery is simplified, and the glue overflow phenomenon generated after the shell is combined with the end cover is effectively improved; the novel conductive adhesive also strengthens the electric connection between the current collecting disc and the electrode assembly, effectively relieves the conditions of uneven current distribution and larger contact resistance caused by welding connection, and can improve the power performance of the battery.

The battery cell disclosed in the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but not limited thereto. Can use and possess this power consumption device's of constitution electrical power generating system such as battery monomer, battery that this application is disclosed, like this, be favorable to alleviating and automatically regulated electric core bulging force worsens, and supplementary electrolyte consumes, promotes the stability and the battery life-span of battery performance.

The electric equipment provided by the embodiment of the application can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. The vehicle can be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; electric toys include stationary or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric airplane toys, and the like; the electric 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, 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 power requirements for operation during starting, navigation, and traveling of the vehicle 1000.

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 13 and a battery cell 14, and the battery cell 14 is accommodated in the case 13. The case 13 is used to provide a receiving space for the battery cells 14, and the case 13 may have various structures. In some embodiments, the case 13 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 14. 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 box 13 formed by the first part 11 and the second part 12 may be various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 100, the battery cells 14 may be multiple, and the multiple battery cells 14 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 14. The plurality of battery monomers 14 can be directly connected in series or in parallel or in series-parallel, and then the battery pack 15 formed by the plurality of battery monomers 14 is accommodated in the box body 13; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 14 in series, in parallel, or in series-parallel, and a plurality of battery modules are connected in series, in parallel, or in series-parallel to form a battery pack 15 and accommodated in the box 13. The battery 100 may also include other structures, for example, the battery 100 may also include a bus member for achieving electrical connection between the plurality of battery cells 14.

Wherein each battery cell 14 may be a secondary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The cells 14 may be cylindrical, prismatic, or other multi-prismatic shapes, etc.

Referring to fig. 3, fig. 3 is an exploded schematic view of a battery cell 14 according to some embodiments of the present disclosure. The battery cell 14 refers to the smallest unit constituting the battery. As shown in fig. 3, the battery cell 14 includes the end cap 9, the case 10, the electrode assembly 7, and other functional components.

The end cap 9 refers to a member that covers an opening of the case 10 to insulate the internal environment of the battery cell 14 from the external environment. Without limitation, the shape of the end cap 9 may be adapted to the shape of the housing 10 to fit the housing 9. Alternatively, the end cap 9 may be made of a material (e.g., stainless steel) with certain hardness and strength, so that the end cap 9 is not easily deformed when being extruded and collided, and the single battery 14 may have higher structural strength and improved safety performance. The end cap 9 may be provided with a functional member such as the positive electrode post 2. The positive electrode post 2 may be used to electrically connect with the electrode assembly 7 for outputting or inputting electric energy of the battery cell 14. In some embodiments, a pressure relief mechanism for relieving the internal pressure of the battery cell 14 when the internal pressure or temperature reaches a threshold value may also be provided on the end cap 9. The material of the end cap 9 may be various materials, such as stainless steel, spring steel, heat-resistant steel, etc., and the embodiment of the present application is not particularly limited thereto. In some embodiments, an insulating plastic gasket 4 may also be provided on the inside of the end cap 9, and the insulating plastic gasket 4 may be used to isolate the electrical connection components within the housing 10 from the end cap 9 to reduce the risk of short circuits. Illustratively, the insulating plastic gasket may be plastic, rubber, or the like.

The housing 10 is an assembly for mating with the end cap 9 to form an internal environment for the battery cell 14, wherein the formed internal environment may be used to house the cell assembly 7, electrolyte, and other components. The housing 10 and the end cap 9 may be separate components, and an opening may be provided in the housing 10, and the opening may be covered by the end cap 9 to form the internal environment of the battery cell 14. Without limitation, the end cap 9 and the housing 10 may be integrated, and specifically, the end cap 9 and the housing 10 may form a common connecting surface before other components are inserted into the housing, and when it is required to enclose the inside of the housing 10, the end cap 9 covers the housing 10. The housing 10 may be of various shapes and various sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism shape, and the like. Specifically, the shape of the case 10 may be determined according to the specific shape and size of the electrode assembly 7.

Referring still to fig. 3, fig. 3 is an exploded view of the battery cell 14 according to some embodiments of the present application. The application provides a battery monomer connecting structure 14, wherein the battery monomer comprises a shell 10, an end cover 9, an electrode component 7, a current collecting plate component and a sealing structure in the battery monomer 14; the electrode assembly 7 is disposed inside the case 10; the current collecting disc assembly comprises a positive current collecting disc 5 and a negative current collecting disc 8, is respectively positioned between the end cover 9 and the shell 10, and is connected with two ends of the electrode assembly 7; the end covers 9 cover the two ends of the shell 10; the seal structure is used to secure various components within the battery cell 14; the collector plate assembly can be fixedly connected to the end cap 9 and the housing 10 by means of a glue.

The electrode assembly 7 is formed by winding and combining a positive electrode tab, a negative electrode tab and a diaphragm, and the electrode assembly 7 is a main element for generating electricity in the battery; the case 10 is formed by winding in a winding direction to wrap the electrode assembly; as shown in fig. 3, the electrode assembly 7 is placed inside the case 10; the current collecting disc assembly is formed by combining an anode current collecting disc 5 and an anode current collecting disc 8 at two ends, the current collecting disc assembly can conduct electricity generated by the electrode assembly 7 in a concentrated mode, the anode current collecting disc 5 and the anode current collecting disc 8 are coated with colloid, are combined with the shell 10 and the end cover 9 and are fixedly connected between the shell 10 and the end cover 9; the end caps 9 cover both ends of the housing 10, and the end caps 9 are used for sealing the housing 10.

The colloid has viscosity, and the positive current collecting disc 5 and the negative current collecting disc 8 can be fixedly connected with the shell 10 and the end cover 9 through the adhesion property of the colloid; the novel colloid is adopted to connect the current collecting disc, the shell 10 and the end cover 9, so that the effect of buffering pressure can be achieved on the electrode assembly 7, the connection mode of welding the current collecting disc and the electrode assembly 7 and connecting the current collecting disc and the shell 10 and the end cover 9 can be omitted, and the process steps in the current production process are simplified.

According to some embodiments of the present application, the current collecting disk assembly includes a positive current collecting disk 5 and an negative current collecting disk 8, both end surfaces of the electrode assembly 7 being connected to the positive current collecting disk 5 and the negative current collecting disk 8, respectively; the colloid is coated on two end faces of the anode current collecting disc 5 and the cathode current collecting disc 8.

In the above embodiment, the position where the colloid is coated on the current collecting plate assembly is a part covered by two end faces of the current collecting plate of the positive current collecting plate 5 and the current collecting plate of the negative current collecting plate 8; referring to fig. 5 and 6, a small amount of colloid is coated on one side of the positive current collecting plate 5 connected to the end cap 9, and the colloid on the whole end surface is coated on the opposite side; the entire surface of the negative current collecting plate 8 was coated with a gel on both sides.

The colloid coated on the two ends of the anode current collecting disc 5 and the cathode current collecting disc 8 can be directly connected with the end covers 9 on the two ends of the shell 10.

According to some embodiments of the present application, the colloid is conductive adhesive 6.

In the above embodiment, the colloid is coated on two ends of the positive current collecting plate 5 and the negative current collecting plate 6, wherein the colloid is the conductive adhesive 6 which can help to fix the positive current collecting plate 5, the negative current collecting plate 8, the electrode assembly 7 and the end cap 9;

the conductive adhesive 6 can be configured as a conductive gel, a conductive tape, or any gel that can produce a conductive effect and can produce an adhesive effect; the conductive adhesive 6 is coated on the two ends of the current collecting plate, and the current collecting plate is connected with the shell 10 and the end cover 9 in an electric connection mode.

The characteristics of the conductive adhesive 6 can help the electrode assembly 7 to better connect the positive current collecting plate 5, the negative current collecting plate 8 and the end cover 9 to form a power-on loop, so that the generation of resistance is reduced, and the current amount distribution in the battery cell 14 is more uniform.

According to some embodiments of the present application, the header assembly is fixedly connected to the end cap and the housing by electrical connections.

The collector plate assembly, which is one of the internal components of cell 14, is disposed within case 10, connected to electrode assembly 7, between end cap 9 and electrode assembly 7.

The current collecting disc assembly comprises an anode current collecting disc 5 and a cathode current collecting disc 8, the anode current collecting disc 5 and the cathode current collecting disc 8 are respectively coated on two end faces of the anode current collecting disc 5 and the cathode current collecting disc 8 through conductive adhesive 6, and the anode current collecting disc 5 and the cathode current collecting disc 8 are fixedly connected with an end cover 9 and a shell 10, namely, the anode current collecting disc 5, the cathode current collecting disc 8, the end cover 9 and the shell 10 can generate a better conductive transmission effect in the process of electrical connection, and meanwhile, the connection stability between the anode current collecting disc 5, the cathode current collecting disc 8, the end cover 9 and the shell 10 is enhanced.

According to some embodiments of the present application, the sealing structure includes a sealing nail 1, a positive electrode post 2, a sealing gasket 3, an insulating plastic gasket 4, a positive electrode current collecting plate 5, an electrode assembly 7, a negative electrode current collecting plate 8, and a bottom cover 9b, which are sequentially connected from top to bottom through a conductive adhesive 6.

The inside of the casing 10 is sequentially connected with a sealing nail 1, an anode pole 2, a sealing washer 3, an insulating plastic washer 4, an anode current collecting disc 5, an electrode assembly 7, a cathode current collecting disc 8 and a bottom cover 9b which are sequentially connected with a conductive adhesive 6 from top to bottom through the conductive adhesive 6 to form a sealing structure.

With the battery cell 14 having the above-described sealing structure, the airtightness of the battery cell 14 can be improved, and at the same time, the connections between the respective components included in the sealing structure in the battery cell 14 are stabilized and strengthened.

According to some embodiments of the present application, the sealing structure can further sequentially connect the sealing nail 1, the positive electrode post 2, the sealing gasket 3, the insulating plastic gasket 4, the electrode assembly 7, and the bottom cover 9b from top to bottom through the conductive adhesive.

The internal structure of the battery cell 14 can adopt different sealing structures to connect the sealing nail 1, the positive pole post 2, the sealing washer 3, the insulating plastic washer 4, the electrode assembly 7 and the bottom cover 9b from top to bottom through the conductive adhesive 6.

The sealing structure can simplify the arrangement and improve the assembly efficiency of the battery cells 14.

According to some embodiments of the present application, the conductive paste 6 is composed of a matrix resin and conductive particles.

The conductive adhesive 6 is composed of matrix resin and conductive particles, the matrix resin has viscosity, and the conductive particles are combined together by the bonding effect of the matrix resin to form a conductive path so as to realize conductive connection with a bonded material. The conductive adhesive 6 can be tightly adhered to the metal surface, and has the advantages of durability and corrosion resistance. In addition, the conductive adhesive 6 has weak fluidity, is not easy to overflow and does not need high-temperature melting and solidification

According to some embodiments of the present application, the conductive layer 15 is formed after the conductive paste 6 is electrically connected to the current collecting plate assembly, and the thickness of the conductive layer 15 is 0.05mm to 0.55mm.

After the conductive paste 6 is applied to the collector assembly, it can be attached to the end cap 9, the case 10, and the electrode assembly 7; both end faces of positive current collecting plate 5 and negative current collecting plate 8 can produce conductive layers 15.

The conductive layer 15 can help to cushion the electrode assembly 7 from more pressure; after the conductive layer 15 conforming to the predetermined value range is formed, more current-carrying loops can be provided on both end faces connected to the conductive layer 15, the current conduction capability inside the electrode assembly 7 is enhanced, and the current stability of the electrode assembly 7 is improved.

According to some embodiments of the present application, the housing 10 is cylindrical or prismatic.

The housing 10 is a non-limited shape, and when the angle of the surface enclosed by the periphery of the housing 10 changes, the outer surface of the housing 10 changes differently, such as prism shape.

The single battery cells 14 manufactured by the cylindrical or prismatic type casing 10 have relatively low cost and high production efficiency and grouping efficiency.

According to some embodiments of the present application, the battery cell 14 includes a case 10, an electrode assembly 7, an end cap 9, and a sealing structure; the end cover 9 comprises a top cover 9a and a bottom cover 9b, which are respectively located at openings at two ends of the shell 10 and are used for covering the shell 10.

Two ends of the shell 10 are provided with two through openings which are oppositely arranged; the end cover 9 is divided into a top cover 9a and a bottom cover 9b; the top cover 9a is formed by combining a sealing nail 1, a positive pole post 2, a sealing washer 3 and an insulating plastic washer 4; two end covers 9 cover the openings at the two ends of the shell 10 respectively.

The end caps 9 cover the openings at the two ends of the casing 10, the positive current collecting plate 5 and the negative current collecting plate can respectively communicate the top cover 9a and the bottom cover 9b by utilizing the electric connection generated by the coating area of the conductive adhesive 6, and the interface of the casing 10 is sealed, so that the air tightness of the casing is improved, and the conductive adhesive 6 is prevented from overflowing out of the end caps.

According to some embodiments of the present application, the electrode assembly 7 further includes tabs, both ends of which extend outward in the direction of the case opening and are connected to the current collecting disk assembly.

The two ends of the electrode assembly 7 are provided with lugs with opposite polarities, the lugs with opposite polarities comprise a positive lug and a negative lug (not shown in the figure), and the positive lug and one side of the positive current collecting disc 5, which faces the electrode assembly 7, are connected through a conductive adhesive 6; the anode tab is connected to the side of the anode current collecting disk 8 facing the electrode assembly 7 by coating the conductive paste 6.

The positive electrode lug and the negative electrode lug generate an electric path with the current collecting disc assembly through the conductive adhesive 6, and the electric energy conduction efficiency of the electrode assembly 7 is improved.

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

According to some embodiments provided herein, there is also provided an electric device including the battery according to any of the above aspects, and the battery can be used to provide electric energy for the electric device.

According to some embodiments of the present application, referring to fig. 3 to 6, the present application provides a connection structure of a novel cylindrical battery cell 14, wherein the battery cell 14 includes an electrode assembly 7, an end cap 9, and a case 10; the two ends of the electrode component 7 are provided with a positive electrode lug and a negative electrode lug which extend towards the opening direction of the shell 10; the positive pole lug and the negative pole lug can be electrically connected with a positive pole current collecting disc 5 coated by positive pole current collecting disc conductive adhesive 6a and a negative pole current collecting disc 8 coated by negative pole current collecting disc conductive adhesive 6b respectively at a top cover 9a and a bottom cover 9b; wherein, the end cover 9 is divided into a top cover 9a and a bottom cover 9b; the battery cell 14 further comprises a sealing structure, and the sealing structure is sequentially connected with a sealing nail 1, an anode pole 2, a sealing washer 3, an insulating plastic washer 4, an anode current collecting disc 5a, an electrode assembly 7, a cathode current collecting disc 5b and a bottom cover 9b from top to bottom through a conductive adhesive 6; end caps 9 are respectively disposed on openings at both ends of the case 10 for sealing the battery cells 14; the battery monomer 14 realizes the direct electric connection of the current collecting plate assembly, the top cover 9a, the bottom cover 9b and the shell 10 through the sealing structure and the combination of the positive current collecting plate 5, the negative current collecting plate 8 and the conductive adhesive 6, thereby simplifying the connection structure of the cylindrical battery.

According to some embodiments of the present application, referring to fig. 4 to 6, the present application further provides a connection structure of a novel cylindrical battery cell 14, wherein the battery cell 14 includes an electrode assembly 7, an end cap 9, and a case 10; the two ends of the electrode assembly 7 are provided with a positive electrode lug and a negative electrode lug which extend towards the opening direction of the shell 10; the end cover 9 is divided into a top cover 9a and a bottom cover 9b; the single battery 14 further comprises a sealing structure, and the sealing structure is sequentially connected with the sealing nail 1, the anode pole 2, the sealing washer 3, the insulating plastic washer 4, the electrode assembly 7 and the bottom cover 9b from top to bottom through the conductive adhesive 6; end caps 9 are respectively disposed on openings at both ends of the case 10 for sealing the battery cells 14; the battery cell 14 is combined with the conductive adhesive 6 through a sealing structure, so that the electrode assembly is directly and electrically connected with the top cover 9a, the bottom cover 9b and the shell 10, and the connecting structure of the cylindrical battery is simplified.

The application also provides a novel conductive adhesive 6, wherein the conductive adhesive 6 is composed of matrix resin and conductive particles, the matrix resin has a bonding effect, and a battery part coated with the conductive adhesive 6 can be combined with the conductive particles to form a conductive path so as to realize conductive connection; the conductive adhesive 6 can play a role of bonding and can tightly combine the shell 10 with other parts in the battery cell 14; meanwhile, the conductive adhesive 6 can be directly connected with the collector plate assembly, the positive pole post 2 and the bottom cover 9, and high-temperature melting is not needed, so that the connection structure of the battery monomer 14 is simplified.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (13)

1. A battery cell, said battery cell comprising:

a case for placing the electrode assembly;

the end covers are covered and arranged at the upper ends of the openings at the two ends of the shell;

an electrode assembly disposed in the case;

the sealing structure is used for fixedly connecting the shell and the battery monomer;

the collecting tray assembly is arranged between two ends of the electrode assembly and the end covers, and is characterized in that the collecting tray assembly is fixedly connected with the end covers and the shell through colloid.

2. The battery cell according to claim 1, wherein the current collecting disk assembly comprises a positive current collecting disk and an negative current collecting disk, and two end surfaces of the electrode assembly are respectively connected with the positive current collecting disk and the negative current collecting disk; the colloid is coated on two end faces of the anode current collecting disc and the cathode current collecting disc.

3. The battery cell of claim 1, wherein the gel is a conductive gel.

4. The cell defined in claim 1, wherein the header assembly is electrically connected to the end cap and the housing.

5. The battery cell of claim 1, wherein the sealing structure comprises a sealing nail, a positive electrode post, a sealing washer, an insulating plastic washer, a positive current collecting plate, an electrode assembly, a negative current collecting plate and a bottom cover which are sequentially connected from top to bottom through a conductive adhesive.

6. The battery cell according to claim 1, wherein the sealing structure further comprises a sealing nail, a positive electrode post, a sealing gasket, an insulating plastic gasket, an electrode assembly and a bottom cover sequentially connected from top to bottom through a conductive adhesive.

7. The battery cell as recited in claim 3 wherein the conductive adhesive comprises a matrix resin and conductive particles.

8. The battery cell according to claim 3, wherein the conductive adhesive is electrically connected to the current collecting plate assembly to form a conductive layer, and the thickness of the conductive layer is 0.05mm to 0.55mm.

9. The battery cell of claim 1, wherein the housing is cylindrical or prismatic.

10. The battery cell of claim 1, wherein the battery cell comprises a housing, an electrode assembly, an end cap, and a sealing structure; the end cover comprises a top cover and a bottom cover, and the top cover and the bottom cover are respectively positioned at openings at two ends of the shell and are used for covering the shell.

11. The cell defined in claim 1, wherein the electrode assembly further includes tabs extending outwardly from both ends in the direction of the opening in the case and connected to the collector disc assembly.

12. A battery comprising at least one cell according to any one of claims 1 to 11.

13. An electrical consumer, characterized in that the consumer comprises a battery according to claim 12 for providing electrical energy.

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