CN217740741U - Battery monomer, battery and consumer - Google Patents

Abstract

The application discloses battery monomer, battery and consumer. The battery cell includes: the electrode assembly includes a case, a first electrode assembly, a second electrode assembly, and an insulating member. The first electrode assembly and the second electrode assembly are accommodated in the case and arranged in a first direction, the first electrode assembly includes a first body and a first tab drawn out from one end of the first body facing the second electrode assembly, and the second electrode assembly includes a second body. An insulating member disposed between the first body and the second body, the insulating member including a first baffle, at least a portion of the first baffle being disposed between the first tab and the first body to block the first body from the first electrode assembly. According to the technical scheme, the short circuit can be prevented from occurring in the contact between the first main body and the first lug, the edge and the end of the first lug are separated from the first main body, the first main body is protected, and the stability and the safety of the operation of the battery cells are improved.

Description

Battery monomer, battery and consumer

Technical Field

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

Background

The battery cell is widely used in electronic devices such as a mobile phone, a notebook computer, a battery car, an electric airplane, an electric ship, an electric toy car, an electric toy ship, an electric toy airplane, an electric tool, and the like. The battery monomer can comprise a cadmium-nickel battery monomer, a hydrogen-nickel battery monomer, a lithium ion battery monomer, a secondary alkaline zinc-manganese battery monomer and the like.

At present, how to improve the energy density of the battery cell and improve the stability of the battery in use are the key points of research by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present application provides a battery cell, which can improve the safety and stability of a battery.

In a first aspect, the present application provides a battery cell, comprising:

a housing;

a first electrode assembly and a second electrode assembly accommodated in the case and arranged in a first direction, the first electrode assembly including a first body and a first tab led out from one end of the first body facing the second electrode assembly, the second electrode assembly including a second body; and

and the insulating member is arranged between the first main body and the second main body and comprises a first baffle plate, and at least part of the first baffle plate is arranged between the first tab and the first main body so as to block the first main body and the first electrode assembly.

In the technical scheme of the embodiment of the application, the first electrode assembly and the second electrode assembly are arranged in the shell along the first direction, so that a space can be provided for the installation of the insulating member, and the installation of the insulating member is facilitated. The first electrode lug and the second electrode lug are respectively used for leading out electric energy of the first electrode assembly and the second electrode assembly. The first baffle is arranged between the first lug and the first main body, so that short circuit caused by contact between the first main body and the first lug can be prevented, and meanwhile, the edge and the end part of the first lug are prevented from damaging the first main body.

In some embodiments, the insulating member includes a first insulating member, wherein the first insulating member includes a first baffle and a second baffle disposed opposite the first baffle along the first direction, the second electrode assembly further includes a second tab, and at least a portion of the second baffle is disposed between the second tab and the second body to block the second body from the second electrode assembly.

In the structure, the second baffle is arranged, so that short circuit caused by contact between the second main body and the second pole lug is prevented, and meanwhile, the edge and the end part of the second pole lug are prevented from damaging the second main body.

In some embodiments, the first insulating member further includes a top plate disposed between the first baffle and the second baffle to connect the first baffle and the second baffle, and the top plate, the first baffle and the second baffle surround to form a first accommodating cavity for accommodating the first tab.

In foretell structure, through setting up the roof, connect first baffle and second baffle to enclose to close and form the first chamber that holds, promote the intensity of first baffle and second baffle, guarantee the stability of structure.

In some embodiments, the second electrode assembly further includes a second tab drawn from an end of the second body facing the first electrode assembly, the first tab being connected to the second tab.

In some embodiments, the insulating member further includes a second insulating member disposed on one side of the first insulating member in a second direction, the first tab and the second tab passing between the first insulating member and the second insulating member and at least partially protruding into the first receiving cavity, the second direction being perpendicular to the first direction. Through setting up relative first insulating member and second insulating member, be convenient for first utmost point ear and second utmost point ear and the connection of insulating member, promote the efficiency of insulating member installation.

In some embodiments, a second accommodating cavity opposite to the first accommodating cavity is arranged on the second insulating component, and the second accommodating cavity is communicated with the first accommodating cavity. In the above embodiment, the second receiving cavity is provided to increase the placing space of the first tab and the second tab, and reduce the weight of the second insulating member.

In some embodiments, the number of the first tabs is two, two first tabs are spaced apart in a third direction, the third direction is perpendicular to the first direction, the number of the first insulating members is correspondingly two, and the two first insulating members are integrally formed. In the structure, the battery cell with the plurality of pole lugs can be conveniently insulated, the two first insulating components are integrally formed, and the production and installation efficiency of the insulating components can be improved.

In some embodiments, the first insulating member further includes a plurality of mounting portions disposed between the first body and the second body, the mounting portions are spaced apart from each other along the third direction, the mounting portions are connected to the first baffle, the second baffle and the top plate, respectively, a thickness H1 of the mounting portions in the first direction and a minimum distance H2 between the first baffle and the second baffle satisfy the relationship: h1 > H2. The strength of the mounting portion is improved by increasing the thickness of the mounting portion, and the first baffle and the second baffle are protected at the same time.

In some embodiments, two adjacent mounting portions and the first baffle enclose to form a first avoiding groove, a convex portion is formed on one side, facing the first insulating member, of the first main body, and the first avoiding groove is used for accommodating at least part of the convex portion. The first receding groove is arranged to provide a space for the convex part, so that the first main body is prevented from being extruded at the insulating component to cause the performance reduction of the battery.

In some embodiments, the mounting portion is provided with at least one weight-reducing cavity. In the above structure, the weight reduction cavity is provided, so that the weight and the material cost of the insulating member can be reduced.

In some embodiments, the first and second insulating members snap-fit. By adopting the connection mode, the first pole lug can be stably connected with the first insulating component and the second insulating component, and meanwhile, the insulating components can be conveniently mounted

In some embodiments, the end surface of the first insulating member facing the second insulating member is provided with a protrusion, and the end surface of the second insulating member facing the first insulating member is provided with a groove, and the protrusion and the groove are matched to clamp the first insulating member and the second insulating member. In the embodiment, the first insulating member and the second insulating member are connected in a clamping mode through the protrusion and the groove, no extra space is occupied, and the energy density of the battery cell is guaranteed.

In some embodiments, the battery cell further includes a first electrode terminal and a second electrode terminal disposed at the housing; the first electrode assembly further comprises a third tab led out from one end of the first main body, which is far away from the second electrode assembly, and the first electrode terminal is electrically connected with the third tab to lead out the electric energy of the first electrode assembly. Set up third utmost point ear, first electrode terminal and second electrode terminal and derive the electric energy in the battery monomer, be convenient for battery monomer and other equipment connections.

In a second aspect, the present application provides a battery including the battery cell of the above embodiment.

In a third aspect, the present application provides a powered device, which includes the battery in the above embodiments, and the battery is used for providing electric energy.

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

Drawings

Features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying 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 according to some embodiments of the present application;

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

fig. 4 is a schematic structural view of a battery cell according to other embodiments of the present application;

fig. 5 is a schematic cross-sectional view of a battery cell according to some embodiments of the present application;

FIG. 6 is an enlarged schematic view of FIG. 5 at circle A;

FIG. 7 is a schematic structural view of a first insulating member according to some embodiments of the present application;

FIG. 8 is another enlarged schematic view of FIG. 5 taken at circle A;

FIG. 9 is a schematic view of a second insulating member according to some embodiments of the present application.

Detailed description of the reference numerals

1000. A vehicle; x, a first direction; y, a second direction; z, a third direction;

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

10. a box body; 11. a first portion; 12. a second portion;

20. a battery cell; 21. an end cap assembly; 22. a housing; 23. an electrical core assembly; 24. an explosion-proof valve; 25. an electrode terminal; 25a, a positive electrode terminal; 25b, a negative electrode terminal;

26. a housing; 2601. a first electrode terminal; 2602. a second electrode terminal;

27. a first electrode assembly; 2701. a first body; 2702. a first tab; 2703. a convex portion;

28. a second electrode assembly; 2801. a second body; 2802. a second tab; 2803. a fourth tab;

29. an insulating member; 2901. a first insulating member; 2902. a second insulating member; 2903. a first baffle; 2904. a second baffle; 2905. a top plate; 2906. a protrusion; 2907. a groove; 2908. a first abdicating groove; 2909. a second abdicating groove; 2911. a first accommodating chamber; 2912. a second accommodating chamber; 2913. an installation part; 2914. a weight-reducing cavity.

Detailed Description

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

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

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

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

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing 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 associated 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. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

With the vigorous development of the new energy industry and the further popularization of new energy electric vehicles, the requirements on the safety performance of the power battery pack are more emphasized. The power battery is mainly composed of a plurality of battery cells, and therefore the safety performance of the battery cells largely determines the safety performance of the battery.

A plurality of electrode assemblies may be included in a battery cell, and the electrode assemblies may be connected in series, parallel, or series-parallel. A plurality of tabs of the electrode assembly protrude from the inside of the electrode assembly to draw out electric power of the electrode assembly. The electric energy conduction of the electrode assembly can be achieved by welding the tabs of the electrode assembly. However, the internal structure of the electrode assembly is frequently damaged, resulting in the failure of the battery.

In the research process, the inventor finds that after the welding of the tab is completed, the tab is bent, the end part of the bent tab extends towards the inside of the electrode assembly, and the tab may be overlapped with the inside of the electrode assembly in the use process, so that the short circuit phenomenon of the battery is caused. And, because the pole ear is made of metal sheet, have higher flexibility, and edge and end are very sharp. After the welding of the tabs of the adjacent electrode assemblies is completed, the tabs are easy to move under the action of external force, and the edges or the ends of the tabs can damage the internal structure of the electrode assemblies.

Based on the above considerations, in order to improve the safety of the electrode assembly and prolong the service life of the battery, the inventors studied and designed a battery cell including: and the insulating member is arranged between the first electrode assembly and the second electrode assembly and comprises a first baffle plate, and at least part of the first baffle plate is arranged between the first lug of the first electrode assembly and the first main body so as to block the first main body from the first electrode assembly.

The battery monomer of this application embodiment, locate first utmost point ear with insulating member's at least part and between the first main part, can prevent to contact between first main part and the first utmost point ear and cause the battery monomer short circuit, can prevent simultaneously that the edge and the tip of first utmost point ear from causing the damage to first main part, promote the free security of battery, prolong the life of battery.

The battery cell and the battery disclosed in the embodiments of the present application can be used in electric devices such as vehicles, ships, or aircrafts, but are not limited thereto. The power supply system who possesses this consumer of constitution such as battery monomer, battery that this application disclosed can be used, like this, can prevent that the electrode subassembly among the battery monomer from taking place the short circuit, perhaps takes place to damage when receiving external force, effectively promotes the life-span of the performance extension battery of battery, guarantees the operating stability of consumer.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric device can be but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

For convenience of description, the following embodiments take an electric device of an embodiment of the present application as an example of a vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present disclosure. The vehicle 1000 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or a range-extended automobile, etc. The battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, and for example, the battery 100 may serve as an operation power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to supply power to the motor 300, for example, for starting, navigation, and operational power requirements while the vehicle 1000 is traveling.

In some embodiments of the present application, the battery 100 may be used not only as an operating power source of the vehicle 1000, but also as a driving power source of the vehicle 1000, instead of or in part of fuel or natural gas, to provide driving power for the vehicle 1000.

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

In the battery 100, the number of the battery cells 20 may be multiple, and the multiple battery cells 20 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the multiple battery cells 20. The plurality of battery cells 20 may be directly connected in series or in parallel or in series-parallel, and the whole body formed by the plurality of battery cells 20 is accommodated in the case 10. Of course, the battery 100 may also be formed by connecting a plurality of battery cells 20 in series, in parallel, or in series-parallel to form a battery module, and then connecting a plurality of battery modules in series, in parallel, or in series-parallel to form a whole, and accommodating the whole in the case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for achieving electrical connection between the plurality of battery cells 20.

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

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

The end cap assembly 21 refers to a member that covers an opening of the case 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap assembly 21 may be adapted to the shape of the housing 22 to fit the housing 22. Alternatively, the end cap assembly 21 may be made of a material (e.g., an aluminum alloy) having certain hardness and strength, so that the end cap assembly 21 is not easily deformed when being extruded and collided, and thus the battery cell 20 may have higher structural strength and the safety performance may be improved. The end cap assembly 21 may be provided with functional components such as the electrode terminals 25. The electrode terminals 25 may be used to electrically connect with the electric core assembly 23 for outputting or inputting electric power of the battery cells 20. In some embodiments, a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value may be further disposed on the end cap assembly 21. The material of the end cap assembly 21 may also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in this embodiment. In some embodiments, insulation may also be provided on the inside of the end cap assembly 21, which may be used to isolate the electrical connection components within the housing 22 from the end cap assembly 21 to reduce the risk of short circuits. Illustratively, the insulator may be plastic, rubber, or the like.

The case 22 is a component for mating with the end cap assembly 21 to form the internal environment of the battery cell 20. The internal environment formed may be used to house, among other things, the cell assembly 23, electrolyte, and other components. The housing 22 and the end cap assembly 21 may be separate components, and an opening may be provided in the housing 22, and the opening may be covered by the end cap assembly 21 to form the internal environment of the battery cell 20. Without limitation, the end cap assembly 21 and the housing 22 may be integrated, and specifically, the end cap assembly 21 and the housing 22 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 22, the end cap assembly 21 covers the housing 22. The housing 22 may be a variety of shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 may be determined according to the specific shape and size of the electric core assembly 23. The material of the housing 22 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not limited in the embodiments of the present invention.

The cell assembly 23 is a component in the battery cell 100 where electrochemical reactions occur. One or more electrical core assemblies 23 may be contained within the housing 22. The core assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is generally provided between the positive and negative electrode sheets. The parts of the positive plate and the negative plate with the active materials form the main body part of the electric core assembly, and the parts of the positive plate and the negative plate without the active materials form the tabs respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or at both ends of the main body portion, respectively. During the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs are connected with the electrode terminals to form a current loop.

Referring to fig. 4 to 9, fig. 4 is a schematic structural diagram of a battery cell 20 according to another embodiment of the present disclosure; fig. 5 is a schematic cross-sectional view of a battery cell 20 according to some embodiments of the present application; FIG. 6 is an enlarged schematic view of FIG. 5 at circle A; fig. 7 is a schematic structural diagram of a first insulating member 2901 according to some embodiments of the present application; FIG. 8 is another enlarged schematic view of FIG. 5 at circle A; fig. 9 is a schematic diagram of a second insulating member 2902 according to some embodiments of the present application.

As shown in fig. 4, a battery cell 20 provided in the embodiment of the present application includes: a case 26, a first electrode assembly 27, a second electrode assembly 28, and an insulating member 29. The first electrode assembly 27 and the second electrode assembly 28 are housed in the case 26 and arranged in the first direction X.

Referring to fig. 5 and 6, the first electrode assembly 27 includes a first main body 2701 and a first tab 2702 extending from an end of the first main body 2701 facing the second electrode assembly 28, and the second electrode assembly 28 includes a second main body 2801. The insulating member 29 is disposed between the first body 2701 and the second body 2801, the insulating member including a first baffle 2903, at least a portion of the first baffle 2903 being disposed between the first tab 2702 and the first body 2701 to block the first body 2701 from the first body 2701.

In the above embodiment, the longitudinal directions of the first electrode assembly 27 and the second electrode assembly 28 extend along the first direction X, and the first tab 2702 and the second tab 2802 respectively extend from two ends of the first electrode assembly 27 and the second electrode assembly 28 in the longitudinal direction. Alternatively, the width directions of the first electrode assembly 27 and the second electrode assembly 28 may also be arranged to extend along the first direction X, which is not limited herein.

In the technical solution of the embodiment of the present application, the first electrode assembly 27 and the second electrode assembly 28 are disposed in the case 26 along the first direction X, which can provide a space for installation of the insulating member 29 and facilitate installation of the insulating member 29. The first tab 2702 and the second tab 2802 are used to conduct the electric energy from the first electrode assembly 27 and the second electrode assembly 28, respectively. The first barrier of the insulating member 29 is at least partially disposed between the first tab 2702 and the first body 2701, and can prevent the first body and the first tab from contacting each other to cause a short circuit of the battery cell 20, and prevent the edge and end of the first tab 2702 from damaging the first body 2701.

Alternatively, the number of electrode assemblies is not limited, and may be, for example, three or four or more. For example, the battery cell 20 further includes a third electrode assembly and a fourth electrode assembly. The third electrode assembly and the fourth electrode assembly are also disposed in the case 26 along the first direction X. The third electrode assembly and the fourth electrode assembly may be disposed at one side of the first electrode assembly 27 and the second electrode assembly 28 along a second direction Y perpendicular to the first direction X. Alternatively, the third electrode assembly and the fourth electrode assembly may be connected to the ends of the first electrode assembly 27 and the second electrode assembly 28 and then continuously arranged at the ends of the first electrode assembly 27 and the second electrode assembly 28 along the first direction X.

In the above-described structure, the insulating member 29 may also be disposed between the adjacent two electrode assemblies to achieve the technical effect of preventing the tab from damaging the main body of the battery 100.

In some embodiments of the present application, please refer to fig. 5 and 6 in combination, the insulating member 29 includes a first insulating member 2901 and a second insulating member 2902. The first insulating member 2901 includes a first barrier 2903 and a second barrier 2904 disposed opposite the first barrier 2903 along the first direction X, and the second electrode assembly 28 further includes a second pole tab 2802, and at least a portion of the second barrier 2904 is disposed between the second pole tab 2802 and the second body 2801 to block the second body 2801 from the second electrode assembly 28.

In the above-described structure, by providing the second stopper 2904, a short circuit caused by contact between the second body 2801 and the second pole tab 2802 is prevented, while damage to the second body 2801 by the edge and end of the second pole tab 2802 is prevented.

In some embodiments of the present application, the first insulating member 2901 further includes an upper plate 2905, the upper plate 2905 is disposed between the first and second baffles 2903, 2904 to connect the first and second baffles 2903, 2904, and the upper plate 2905, the first and second baffles 2903, 2904 surround to form a first receiving cavity 2911 for receiving the first tab 2702.

In the above structure, the top plate 2905 is provided to connect the first barrier 2903 and the second barrier 2904 and to surround the first receiving cavity 2911, so that the strength of the first barrier 2903 and the second barrier 2904 is increased and the stability of the structure is ensured.

Alternatively, the first barrier 2903 is disposed parallel to the second barrier 2904, and the top plate 2905 is disposed perpendicular to the first barrier 2903, forming the first receiving cavity 2911 as a cubic structure. The structure is simple and convenient to manufacture, stable in structure, capable of keeping stability of the whole structure when the lug moves and free of deformation when the lug is guaranteed to have a separation effect between the lug and the main body.

In some embodiments of the present application, the second electrode assembly 28 further includes a second tab 2802 extending from an end of the second body 2801 facing the first electrode assembly 27, the first tab 2702 being coupled to the second tab 2802. The first tab 2702 and the second tab 2802 are typically joined by welding and conduct electrical power. One side of the first tab 2702 is connected and fixed to one side of the second tab 2802, and after the connection is stabilized, the first tab 2702 and the second tab 2802 may be placed in the first receiving cavity 2911, and the first insulating member 2901 and the second insulating member 2902 may be connected, so that the first tab 2702 and the second tab 2802 may be separated from the first body 2701 and the second body 2801. The above configuration can improve the stability of connection of the first tab 2702 and the second tab 2802 and the convenience of mounting the insulating member 29.

In some embodiments of the present application, referring to fig. 4-6 in combination, the insulating member 29 further includes a second insulating member 2902 disposed on one side of the first insulating member 2901 along a second direction Y, the first tab 2702 and the second tab 2802 extending between the first insulating member 2901 and the second insulating member 2902 and at least partially into the first receiving cavity 2911, the second direction Y being perpendicular to the first direction X.

By providing opposing first and second insulating members 2901, 2902, the connection of the first and second tabs 2702, 2802 to the insulating member 29 is facilitated, improving the efficiency of the mounting of the insulating member 29.

In some embodiments of the present application, second insulating member 2902 is provided with a second receiving cavity 2912 opposite first receiving cavity 2911, and second receiving cavity 2912 is in communication with first receiving cavity 2911. In the above-described embodiment, the second receiving cavity 2912 is provided to increase the space for placing the first tab 2702 and the second tab 2802, while reducing the weight of the second insulating member 2902.

In some embodiments of the present application, the first insulating member 2901 is identical in structure to the second insulating member 2902. The second insulating member 2902 also has a first stopper 2903, a second stopper 2904, and a top plate 2905. By providing the first insulating member 2901 and the second insulating member 2902 in the same structure, the efficiency of production and installation of the first insulating member 2901 and the second insulating member 2902 can be improved, and the stress balance between the two ends of the first tab 2702 and the second tab 2802 can be ensured, thereby prolonging the service life of the first electrode assembly 27 and the second electrode assembly 28.

In some embodiments of the present application, the number of the first tabs 2702 is two, and the two first tabs 2702 are spaced apart in a third direction Z, which is perpendicular to the first direction X. The two first tabs 2702 may be a positive electrode tab and a negative electrode tab, respectively.

As shown in fig. 7, the number of first insulating members 2901 is set to two correspondingly, and the two first insulating members 2901 are integrally molded. In the above-described structure, the battery cell 20 having the plurality of tabs can be easily insulated, and the two first insulating members 2901 are integrally formed, so that the efficiency of manufacturing and mounting the insulating members 29 can be improved.

Alternatively, the number of the second insulating members 2902 may be two, two second insulating members 2902 are integrally formed, and the two second insulating members 2902 are integrally formed, so that the efficiency of manufacturing and installing the insulating member 29 can be improved.

In some embodiments of the present application, as shown in fig. 7, the first insulating member 2901 further includes a plurality of mounting portions 2913 disposed between the first body 2701 and the second body 2801, the plurality of mounting portions 2913 are disposed at intervals along the third direction Z, the mounting portions 2913 are connected to the first baffle 2903, the second baffle 2904, and the top plate 2905, respectively, a thickness H1 of the mounting portions 2913 in the first direction X and a minimum pitch H2 between the first baffle 2903 and the second baffle 2904 satisfy the relationship: h1 > H2. The first shutter 2903 and the second shutter 2904 are protected while increasing the strength of the mounting portion 2913 by increasing the thickness of the mounting portion 2913.

Optionally, the second insulating member 2902 also includes a plurality of mounting portions 2913 disposed between the first body 2701 and the second body 2801. The plurality of mounting portions 2913 are provided at intervals in the third direction Z, the mounting portions 2913 are connected to the first stopper 2903, the second stopper 2904, and the top plate 2905, respectively, and a thickness H1 of the mounting portions 2913 in the first direction X and a minimum pitch H2 between the first stopper 2903 and the second stopper 2904 satisfy a relationship: h1 > H2. The strength of the mounting portion 2913 is increased by increasing the thickness of the mounting portion 2913, and the first barrier 2903 and the second barrier 2904 are protected.

In some embodiments of the present application, please refer to fig. 6 to 8 in combination, two adjacent mounting portions 2913 and the first blocking plate 2903 enclose to form a first avoiding groove 2908, a convex portion 2703 is formed on one side of the first body 2701 facing the first insulating member 2901, and the first avoiding groove 2908 is used for accommodating at least a portion of the convex portion 2703. The provision of the first relief groove 2908 provides space for the convex portion 2703 to prevent the first body 2701 from being pressed at the insulating member 29 to deteriorate the performance of the battery.

The convex portion 2703 of the first body 2701 is formed when tabs are welded, and a plurality of tabs are formed as portions protruding toward the insulating member 29 when they are stacked, so that the above-described structure is provided with respect to the structural characteristics of the electrode assembly. The first relief groove 2908 is provided to effectively relieve deformation caused by extrusion between the first electrode assembly 27 and the first insulating member 2901 after welding is completed, and to ensure welding stability of the first tab 2702.

Optionally, referring to fig. 8, a convex portion is also formed on one side of the second body 2801 facing the first insulating member 2901, two adjacent mounting portions 2913 on the first insulating member 2901 and the second baffle 2904 enclose to form a second relief groove 2909, and the second relief groove 2909 is disposed, so that deformation caused by pressing between the second electrode assembly 28 and the first insulating member 2901 after welding is effectively alleviated, and welding stability of the second electrode tab 2802 is ensured.

In some embodiments of the present application, the mounting portion 2913 is provided with at least one weight-reducing cavity 2914. In the above-described structure, providing the weight-reduction cavity 2914 can reduce the weight and material cost of the insulating member 29.

In some embodiments of the present application, first insulating member 2901 and second insulating member 2902 are snap-fit. The above connection method can achieve stable connection between the first tab 2702 and the first and second insulating members 2901 and 2902, and also facilitate installation of the insulating member 29.

In some embodiments of the present application, referring to fig. 7 and 9, an end surface of first insulating member 2901 facing second insulating member 2902 is provided with a protrusion 2906, an end surface of second insulating member 2902 facing first insulating member 2901 is provided with a groove 2907, and protrusion 2906 cooperates with groove 2907 to clamp first insulating member 2901 and second insulating member 2902. In the above embodiment, the protrusion 2906 and the groove 2907 are disposed to realize the snap connection between the first insulating member 2901 and the second insulating member, so that no additional space is occupied and the energy density of the battery cell 20 is ensured.

Optionally, the number of the protrusions 2906 is plural, and the number of the grooves 2907 is correspondingly plural. The provision of the plurality of projections 2906 and the grooves 2907 can fix the first insulating member 2901 and the second insulating member 2902 from a plurality of points, ensuring the stability of connection of the first insulating member 2901 and the second insulating member 2902.

In some embodiments of the present application, as shown in fig. 4, the battery cell 20 further includes a first electrode terminal 2601 and a second electrode terminal 2602 disposed at the housing 26; the first electrode assembly 27 further includes a third tab extending from an end of the first body 2701 facing away from the second electrode assembly 28, to which the first electrode terminal 2601 is electrically connected to conduct electrical energy from the first electrode assembly 27. The third tab, the first electrode terminal 2601 and the second electrode terminal 2602 are arranged to lead out the electric energy in the battery cell 20, so that the battery cell 20 can be connected with other devices conveniently.

In some embodiments of the present application, the second electrode assembly 28 further includes a fourth tab 2803 extending from an end of the second body 2801 facing away from the first electrode assembly 27, and a second electrode terminal 2602 is electrically connected to the fourth tab 2803 for conducting electrical energy from the second electrode assembly 28. In the above embodiment, the second tab 2802 and the fourth tab 2803 are arranged to conduct the electric energy out of the battery cell 20, so as to facilitate the connection between the battery cell 20 and other devices.

The embodiment of the present application also provides a battery 100, which includes the battery cell 20 in the above embodiment. Since the battery 100 includes the battery cell 20 of the present invention, it is possible to prevent the electrode assembly and the tab from contacting each other, and to prevent the edge and the end of the first tab 2702 from damaging the first body 2701. Therefore, the battery 100 of the present application also has a long service life, and a safe and stable performance.

The present application provides a power-consuming device, which includes the battery 100 in the above embodiments, and the battery 100 is used for providing electric energy. The powered device may be any of the aforementioned devices or systems that employ battery 100.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; 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 (15)

1. A battery cell, comprising:

a housing;

a first electrode assembly and a second electrode assembly housed in the case and arranged in a first direction, the first electrode assembly including a first body and a first tab drawn out from one end of the first body facing the second electrode assembly, the second electrode assembly including a second body; and

an insulating member disposed between the first body and the second body, the insulating member including a first baffle, at least a portion of the first baffle being disposed between the first tab and the first body to block the first body from the first electrode assembly.

2. The battery cell as recited in claim 1, wherein the insulating member comprises a first insulating member, wherein the first insulating member comprises the first baffle and a second baffle disposed opposite the first baffle along the first direction, wherein the second electrode assembly further comprises a second tab, and wherein at least a portion of the second baffle is disposed between the second tab and the second body to block the second body from the second electrode assembly.

3. The battery cell as recited in claim 2, wherein the first insulating member further comprises a top plate disposed between the first baffle and the second baffle to connect the first baffle and the second baffle, and the top plate, the first baffle and the second baffle enclose a first receiving cavity for receiving the first tab.

4. The battery cell as recited in claim 3 wherein the second electrode assembly further comprises a second tab extending from an end of the second body facing the first electrode assembly, the first tab being connected to the second tab.

5. The battery cell as recited in claim 4, wherein the insulating member further comprises a second insulating member disposed on one side of the first insulating member in a second direction, the first and second tabs extending between the first and second insulating members and at least partially into the first receiving cavity, the second direction being perpendicular to the first direction.

6. The battery cell as recited in claim 5, wherein a second accommodating cavity opposite to the first accommodating cavity is formed in the second insulating member, and the second accommodating cavity is communicated with the first accommodating cavity.

7. The battery cell as recited in claim 5, wherein the number of the first tabs is two, two first tabs are spaced apart from each other in a third direction perpendicular to the first direction, the number of the first insulating members is two, and the two first insulating members are integrally formed.

8. The battery cell according to claim 7, wherein the first insulating member further includes a plurality of mounting portions disposed between the first body and the second body, the mounting portions are spaced apart from each other in the third direction, the mounting portions are connected to the first barrier, the second barrier, and the top plate, respectively, a thickness H1 of the mounting portions in the first direction and a minimum distance H2 between the first barrier and the second barrier satisfy a relationship: h1 > H2.

9. The battery cell according to claim 8, wherein two adjacent mounting portions and the first baffle enclose to form a first avoiding groove, a convex portion is formed on one side of the first main body facing the first insulating member, and the first avoiding groove is used for accommodating at least part of the convex portion.

10. The battery cell as recited in claim 8 or 9, wherein the mounting portion is provided with at least one weight-reducing cavity.

11. The battery cell according to any one of claims 5 to 9, wherein the first insulating member and the second insulating member are snap-fitted.

12. The battery cell as recited in claim 11, wherein the first insulating member has a protrusion on an end surface facing the second insulating member, the second insulating member has a groove on an end surface facing the first insulating member, and the protrusion cooperates with the groove to clamp the first insulating member and the second insulating member.

13. The battery cell according to any one of claims 1 to 8, further comprising a first electrode terminal and a second electrode terminal provided to the housing;

the first electrode assembly further comprises a third tab led out from one end of the first main body, which is far away from the second electrode assembly, and the first electrode terminal is electrically connected to the third tab to lead out electric energy of the first electrode assembly.

14. A battery comprising a cell according to any one of claims 1 to 13.

15. An electrical consumer, characterized in that the consumer comprises a battery according to claim 14 for providing electrical energy.

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