CN219739142U

CN219739142U - Battery and battery device

Info

Publication number: CN219739142U
Application number: CN202320137634.6U
Authority: CN
Inventors: 谷亮杰; 关俊山
Original assignee: China Innovation Aviation Technology Group Co ltd
Current assignee: China Innovation Aviation Technology Group Co ltd
Priority date: 2023-01-29
Filing date: 2023-01-29
Publication date: 2023-09-22
Anticipated expiration: 2033-01-29

Abstract

The present disclosure relates to the field of battery technology, and in particular, to a battery and a battery device, where the battery includes: the battery cell comprises a battery cell, a shell and a connecting piece, wherein the shell comprises a first shell piece and a second shell piece, the first shell piece and the second shell piece are oppositely arranged, the first shell piece and the second shell piece form a containing cavity, and the battery cell is arranged in the containing cavity; the connecting piece is provided with a first connecting part, the first connecting part is arranged between the shell and the battery cell, and the first connecting part is welded with the first shell piece and the second shell piece respectively. The difficulty in connecting the first shell piece and the second shell piece is reduced, so that the yield of the battery can be improved, and the cost of the battery device can be effectively controlled.

Description

Battery and battery device

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery device.

Background

With the development and progress of technology, electric vehicles are increasingly used. Batteries are often provided in electric vehicles for powering the electric vehicle. The battery may include a housing and a battery cell, the housing having a cavity therein, the battery cell being disposed in the cavity of the housing. In the related art center, the shell is often connected through a plurality of parts to form a sealed cavity, and the process difficulty is high when the parts of the shell are connected, so that the yield of the battery is low.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

An object of the present disclosure is to provide a battery and a battery device, and further to at least improve the yield of the battery to a certain extent.

According to one aspect of the present disclosure, there is provided a battery including:

a battery cell;

the shell comprises a first shell piece and a second shell piece, the first shell piece and the second shell piece are oppositely arranged, the first shell piece and the second shell piece form a containing cavity, and the battery cell is arranged in the containing cavity;

the connecting piece is provided with a first connecting part, the first connecting part is arranged between the shell and the battery cell, and the first connecting part is welded with the first shell piece and the second shell piece respectively.

The battery that this disclosed embodiment provided, including casing and electric core, the casing is located to the electric core, and the casing includes first casing spare and second casing spare, and first casing spare and second casing spare form the holding chamber, and the holding chamber is located to the electric core, sets up first connecting portion between electric core and casing, and first connecting portion respectively with first casing spare and second casing spare welding, has reduced the degree of difficulty that first casing spare and second casing spare are connected to can promote the battery yields.

According to another aspect of the present disclosure, there is provided a battery device including the above battery.

The battery device that this disclosed embodiment provided includes the battery, in the casing was located to the electric core in the battery, the casing includes first casing spare and second casing spare, first casing spare and second casing spare form the holding chamber, the holding chamber is located to the electric core, set up first connecting portion between electric core and casing, first connecting portion respectively with first casing spare and second casing spare welding, the degree of difficulty that first casing spare and second casing spare are connected has been reduced to can promote battery yields, and the cost of effectual control battery device.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic view of a battery according to an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of a first battery provided in an exemplary embodiment of the present disclosure;

fig. 3 is a schematic view of another battery according to an exemplary embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of a second battery provided in an exemplary embodiment of the present disclosure;

fig. 5 is a schematic cross-sectional view of a third battery provided in an exemplary embodiment of the present disclosure;

fig. 6 is a schematic cross-sectional view of a fourth battery provided in an exemplary embodiment of the present disclosure;

fig. 7 is a schematic cross-sectional view of a fifth battery provided in an exemplary embodiment of the present disclosure;

fig. 8 is a schematic cross-sectional view of a sixth battery provided in an exemplary embodiment of the present disclosure.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

The present disclosure provides a battery 100, as shown in fig. 1 and 2, the battery 100 including: the battery cell 10, the shell 20 and the connecting piece 30, wherein the shell 20 comprises a first shell piece 21 and a second shell piece 22, the first shell piece 21 and the second shell piece 22 are oppositely arranged, the first shell piece 21 and the second shell piece 22 form a containing cavity, and the battery cell 10 is arranged in the containing cavity; the connector 30 has a first connection portion 31, the first connection portion 31 is provided between the case 20 and the battery cell 10, and the first connection portion 31 is welded to the first case member 21 and the second case member 22, respectively.

The battery that this disclosed embodiment provided, including casing 20 and electric core 10, electric core 10 locates in the casing 20, and casing 20 includes first casing piece 21 and second casing piece 22, and first casing piece 21 and second casing piece 22 form the holding chamber, and the holding chamber is located to electric core 10, sets up first connecting portion 31 between electric core 10 and casing 20, and first connecting portion 31 respectively with first casing piece 21 and second casing piece 22 welding, reduced the degree of difficulty that first casing piece 21 and second casing piece 22 are connected to can promote the battery yields.

The following will describe each part of the battery provided in the embodiments of the present disclosure in detail:

the unit cell in the embodiments of the present disclosure may be a secondary battery, for example, the battery is a ternary lithium battery, an iron lithium battery, a sodium battery, a lithium cobaltate battery, a lithium manganate battery, a lithium titanate battery, or the like. The battery may have a rectangular or approximately rectangular structure, and of course, in practical applications, the battery may be other polygonal batteries or cylindrical batteries, which is not specifically limited in the embodiments of the present disclosure.

The housing 20 serves to form the outer contour of the battery and to protect the devices (e.g., the battery cell 10 and the adapter, etc.) provided within the housing 20. The casing 20 includes first casing piece 21, second casing piece 22 and connecting piece 30, and first casing piece 21 and second casing piece 22 set up relatively, are provided with first sub-holding chamber on the first casing 20, are provided with the second sub-holding chamber on the second casing 20, and first sub-holding chamber and second sub-holding chamber form the holding chamber, and electric core 10 locates the holding chamber.

The first housing part 21 and the second housing part 22 are understood to be half-shells 20, the two half-shells 20 overlapping and being connected by welding, forming a sealed housing 20 with a receiving space. It should be noted that, in the embodiment of the present disclosure, the depths of the first sub-receiving cavity and the second sub-receiving cavity may be the same or different, and the depth of the first sub-receiving cavity and the second sub-receiving cavity need not be the same here for the half-shell 20.

The first housing member 21 includes: the first frame 212 is disposed on a side of the first panel 211 facing the second housing member 22, and the first frame 212 and the first panel 211 define a first sub-accommodating cavity.

The first panel 211 is a flat plate structure, and the first frame 212 may surround the first panel 211. For example, when the battery is a rectangular parallelepiped battery, the first panel 211 may be a rectangular plate and the first frame 212 is a rectangular frame. Or when the battery is a cylindrical battery, the first panel 211 may be a circular plate and the first frame 212 is a circular ring-shaped frame.

In the embodiment of the present disclosure, the first panel 211 and the first frame 212 may be an integrally formed structure, for example, the first housing member 21 may be formed by punching, casting, machining, or the like. Alternatively, the first panel 211 and the first frame 212 may be formed as a separate structure, for example, by welding the first panel 211 and the first frame 212 to form the first housing member 21, which is not particularly limited in the embodiment of the present disclosure.

The material of the first housing member 21 may be a metal material, for example, the material of the first housing member 21 may be aluminum, an aluminum alloy, stainless steel, or the like. The materials of the first panel 211 and the first frame 212 may be the same or different in the first housing part 21.

The second housing part 22 includes a second panel 221 and a second frame 222, the second frame 222 is disposed on a side of the second panel 221 facing the first housing part 21, and the second frame 222 and the second panel 221 enclose a second sub-accommodating cavity.

The second panel 221 is a flat plate structure, and the second frame 222 may surround the second panel 221. For example, when the battery is a rectangular parallelepiped battery, the second panel 221 may be a rectangular plate and the second frame 222 is a rectangular frame. Or when the battery is a cylindrical battery, the second panel 221 may be a circular plate and the second frame 222 is a circular ring frame.

In the embodiment of the present disclosure, the second panel 221 and the second frame 222 may be an integrally formed structure, for example, the second housing member 22 may be formed by punching, casting, machining, or the like from a sheet material. Alternatively, the second panel 221 and the second frame 222 may be formed as a separate structure, for example, the second housing member 22 may be formed by welding the second panel 221 and the second frame 222, which is not specifically limited in this embodiment of the disclosure.

The material of the second housing member 22 may be a metal material, for example, the material of the second housing member 22 may be aluminum, an aluminum alloy, stainless steel, or the like. The materials of the second panel 221 and the second bezel 222 may be the same or different in the second housing piece 22.

The first housing part 21 and the second housing part 22 are disposed opposite to each other, and an end of the first frame 212 remote from the first panel 211 and an end of the second frame 222 remote from the second panel 221 do not have an overlapping portion. That is, an end of the first bezel 212 remote from the first panel 211 and an end of the second bezel 222 remote from the second panel 221 are in contact, or a space is provided between an end of the first bezel 212 remote from the first panel 211 and an end of the second bezel 222 remote from the second panel 221. The first panel 211 and the second panel 221 are disposed in parallel.

Wherein, the longitudinal cross-sectional area of the end of the first frame 212 away from the first panel 211 is the same as the longitudinal cross-sectional area of the end of the second frame 222 away from the second panel 221. This enables the first connecting portion 31 to closely fit the first frame 212 and the second frame 222.

Optionally, in the embodiment of the present disclosure, the area of the first panel 211 is the same as the area of the second panel 221, and the first frame 212 is a straight-barrel frame, that is, the first frame 212 has no bend in a direction perpendicular to the first panel 211. The second frame 222 is a straight-barrel frame, that is, the second frame 222 has no bending in a direction perpendicular to the second panel 221.

A transition fillet is provided in the first housing part 21 at the intersection of the first rim 212 and the first panel 211, which transition fillet facilitates the shaping of the first housing 20. A transition fillet is provided in the second housing part 22 at the intersection of the second rim 222 and the second panel 221, which transition fillet facilitates the shaping of the second housing 20.

The connecting member 30 includes a first connecting portion 31, the first connecting portion 31 is disposed on the inner side of the housing 20, and an orthographic projection of the first connecting portion 31 on the housing 20 along a first direction has a first area and a second area, the first area is located on the first housing member 21, the second area is located on the second housing member 22, and the first direction is a direction perpendicular to a face of the housing 20 connected with the first connecting portion 31. That is, the first connecting portion 31 is partially opposed to the first housing member 21, and the first connecting portion 31 is partially opposed to the second housing member 22. The first connecting portion 31 is welded to the first frame 212 and the second frame 222, respectively.

Further, the connecting member 30 may further include a heat insulating layer 34, where the heat insulating layer 34 is at least disposed on a side of the first connecting portion 31 near the battery cell 10. The battery cell 10 and the first connecting part 31 are separated by the heat insulating layer 34, so that the battery cell 10 is prevented from being damaged during welding.

As shown in fig. 4, a gap is formed between the first housing member 21 and the second housing member 22, and the connection member 30 may further include a support portion 33, one end of the support portion 33 is connected to the first connection portion 31, and the other end of the support portion 33 extends into the gap between the first housing member 21 and the second housing member 22. The support portion 33 divides the first connecting portion 31 into two symmetrical portions, that is, the orthographic projection of the support portion 33 on the first connecting portion 31 is located at the middle portion of the first connecting portion 31.

By arranging the supporting part 33 on the first connecting part 31, the positioning when the first shell member 21 and the second shell member 22 are buckled is realized, so that the mounting alignment is simple and easy to operate, the problem of poor connection quality caused by overlarge deviation of the first connecting part 31 relative to the first shell member 21 and the second shell member 22 is avoided, and the connection stability is improved.

As shown in fig. 5, the connecting piece 30 may further include a second connecting portion 32, where the second connecting portion 32 is disposed on a side of the housing 20 away from the battery cell 10, and the second connecting portion 32 is welded with the first frame 212 and the second frame 222, respectively.

Alternatively, the supporting portion 33 is disposed through a gap between the first frame 212 and the second frame 222, and the supporting portion 33 is connected to the first connecting portion 31 and the second connecting portion 32, respectively. The first connection portion 31, the second connection portion 32, and the support portion 33 form a structure having an "i" shape in cross section.

The first connection portion 31 and the second connection portion 32 may have plate-like structures, respectively, and an orthographic projection of the first connection portion 31 on the second connection portion 32 overlaps with the second connection portion 32. In a possible embodiment of the present disclosure, the connecting piece 30 includes a first connecting portion 31, the first connecting portion 31 is disposed inside the housing 20, and the first connecting portion 31 is welded to the first frame 212 and the second frame 222, respectively. Or the connection member 30 may include a first connection portion 31 and a second connection portion 32, the first connection portion 31 being located inside the housing 20, the second connection portion 32 being located outside the housing 20, the first connection portion 31 and the second connection portion 32 being disposed in parallel. Or the connection member 30 may include a first connection portion 31, a second connection portion 32, and a support portion 33, the first connection portion 31 is located inside the housing 20, the second connection portion 32 is located outside the housing 20, the first connection portion 31 and the second connection portion 32 are disposed in parallel, the support portion 33 is disposed in a gap between the first frame 212 and the second frame 222, and both ends of the support portion 33 are respectively connected with the first connection portion 31 and the second connection portion 32 (forming the i-shaped connection member 30).

The orthographic projection of the second connecting portion 32 onto the housing 20 in the first direction includes a third region located in the first housing part 21 and a fourth region located in the second housing part 22. That is, the projection portion of the second connecting portion 32 on the housing 20 is located at the first frame 212 and the projection portion is located at the second frame 222.

The connecting member 30 may have a ring structure, and the connecting member 30 surrounds the housing 20. The first connecting portion 31 surrounds the inner wall of the battery case 20 for one turn, the second connecting portion 32 surrounds the outside of the case 20 for one turn, and the supporting portion 33 circumferentially surrounds the gap between the first case member 21 and the second case member 22.

The end of the supporting portion 33 away from the first connecting portion 31 does not protrude from the end of the second connecting portion 32 away from the first connecting portion 31. That is, the height of the supporting portion 33 is flush with the second connecting portion 32, or the supporting portion 33 is lower than the second connecting portion 32. The formation of the protrusions on the outer surface of the second connection part 32 is avoided, improving the uniformity of the appearance of the battery, and also facilitating the stacking of a plurality of batteries.

The housing 20 includes two oppositely disposed first surfaces and a plurality of second surfaces between the two first surfaces, the first surface having an area greater than an area of either of the second surfaces; the first panel 211 and the second panel 221 are respectively a first surface of the housing 20, and the first frame 212 and the second frame 222 form a second surface. That is, the junction of the first housing member 21 and the second housing member 22 in the embodiment of the present disclosure is not at the large surface of the battery. For example, when the battery is a rectangular parallelepiped battery, the case 20 includes two oppositely disposed first surfaces and four second surfaces located between the two first surfaces.

Of course, in practical applications, when the battery is a cylindrical battery, the housing 20 may include two opposite end surfaces and a cylindrical side surface between the two end surfaces, where the first frame 212, the second frame 222, and the connecting member 30 are welded to form the cylindrical side surface.

Further, the battery provided in the embodiments of the present disclosure may further include a pole assembly disposed on the housing 20, and the pole assembly is partially disposed inside the battery housing 20, and the pole assembly is partially disposed outside the battery housing 20. The portion of the post assembly located inside the housing 20 is connected to the battery cell 10, and the portion of the post assembly located outside the battery housing 20 is used for connecting devices such as a bus bar.

The pole assembly may be disposed on the first surface or the second surface of the housing 20. For example, a positive electrode tab assembly and a negative electrode tab assembly may be provided at both ends of the first surface of the case 20, respectively. Or a positive electrode column assembly and a negative electrode column assembly are respectively provided on the second surface of the case 20.

When a plurality of cells are integrated into a battery pack, it is often the first surfaces (large surfaces) of the cells that are stacked relatively, and thus the placement of the post assembly on the first surface of the case 20 interferes with the stacking of the cells. To address this problem, a recess may be provided on another first surface of the housing 20 for receiving a post assembly on an adjacent cell.

The recess includes a bottom wall and side walls, i.e., the bottom wall and side walls enclose the recess, and a downward recess is formed in the battery case 20, so that the post assembly can be prevented from affecting the stacking of the batteries. The recess portions may be provided at both ends of the battery, respectively. That is, the recess is disposed at an end of the first surface such that the sidewall intersects the at least one second surface.

The battery cell 10 is arranged in the accommodating cavity of the shell 20, the battery cell 10 comprises a battery cell main body and a tab, and the tab extends out from the length direction of the battery cell main body; the pole lug is connected with the pole column assembly, and the pole column assembly can be arranged at the end part of the battery body, so that the pole lug is convenient to connect, and the length space of the battery can be fully utilized. The tab and the pole assembly may be directly connected, that is, the tab and the pole assembly may be directly welded, or the tab and the pole assembly may be connected by a metal switching piece, and a specific connection manner may be a manner of welding, or a manner of using riveting is not excluded, which is not limited herein.

It should be noted that, the battery core main body includes more than two pole pieces, and the tab includes more than two monolithic tabs, and the monolithic tab extends out from the pole piece rather than corresponding respectively, and the width of monolithic tab is less than the width of pole piece, thereby a plurality of monolithic tabs stack mutually and form the tab to be connected with the utmost point post subassembly, wherein, the tab can be with utmost point post subassembly welding. Wherein the single tab is made of a metal foil having good electrical and thermal conductivity, such as aluminum, copper, or nickel.

In some embodiments, the two pole assemblies are respectively a positive pole assembly and a negative pole assembly, the two pole ears are respectively a positive pole ear and a negative pole ear, the positive pole assembly is connected with the positive pole ear, and the negative pole assembly is connected with the negative pole ear. The battery case 20 may be provided with two recesses, and two pole assemblies are respectively disposed in the two recesses, or only one of the two pole assemblies is disposed in the recess, or the two pole assemblies may be respectively disposed on the two first surfaces. The arrangement positions of the two pole assemblies and the specific structure are not limited.

It should be noted that, the insulation between the pole assembly and the housing 20 may be, for example, insulation by an insulating member, or may be, for example, insulation by an insulating coating, which is not limited herein, and may be selected according to practical requirements.

In one embodiment, the batteries are laminated batteries, so that the batteries are convenient to group and long in length can be obtained through machining.

Specifically, the battery cell 10 is a laminated battery cell, and the battery cell 10 has a first pole piece, a second pole piece opposite to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form a laminated battery cell.

Alternatively, the battery cell 10 may be a winding type battery cell, that is, a first pole piece, a second pole piece opposite to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain the winding type battery cell.

In some possible ways, as shown in fig. 6, the battery cell 10 may include a first sub-battery cell 11 and a second sub-battery cell 12, the first sub-battery cell 11 being located in a first housing member 21 and the second sub-battery cell 12 being located in a second housing member 22. The first sub-cell is electrically connected with the second sub-cell. For example, the first sub-cell 11 and the second sub-cell 12 are connected in series, or the first sub-cell 11 and the second sub-cell 12 are connected in parallel.

The battery may further include a support plate 50, the support plate 50 being positioned at the first and second sub-cells 11 and 12, and the support plate 50 being connected to the first connection part 31. The first housing member 21 and the second housing member 22 are joined (there is no gap between the first housing member 21 and the second housing member 22).

The edge of the support plate 50 may be connected to the inner surface of the first connection portion 31, that is, the support plate 50 does not protrude from the outer surface of the first connection portion 31. The flatness of the outer surface of the battery is guaranteed, and the battery is stacked into groups.

Alternatively, as shown in fig. 7 or 8, the support plate 50 is located between the first sub-cell 11 and the second sub-cell 12, and the support plate 50 is connected to the first connection part 31, and a support part 33 is provided at a side of the first connection part 31 facing away from the support plate 50, with a gap between the first case member 21 and the second case member 22, and the support part 33 extends into the gap. So as to be positioned by the supporting part 33 when the first shell member 21 and the second shell member 22 are buckled, thereby improving the manufacturing efficiency.

The thermal insulation layer 34 is disposed between the battery cell 10 and the housing 20, and an orthographic projection of the thermal insulation layer 34 on the housing 20 at least partially covers the first connection portion 31 of the connection member 30. By providing the heat insulating layer 34 between the case 20 and the battery cell 10, it is possible to prevent the battery cell 10 from being damaged by heat generated when the first case member 21 and the second case member 22 are welded.

In one possible embodiment of the present disclosure, the thermal barrier layer 34 is a thermal barrier coating, which is applied to at least the first connection portion 31. That is, the heat insulating layer 34 is attached to the inner side of the first connecting portion 31. For example, a thermal insulation coating may be applied to a side of the first connection part 31 facing the battery cell 10. Or the heat insulating coating may cover the first connection portion 31, an inner wall of the case 20 adjacent to the first connection portion 31, and the like. Wherein, the material of the heat-insulating coating can be nano heat-insulating material, phenolic foam plastic, polyurethane foam plastic or ceramic coating, etc.

In another possible embodiment of the present disclosure, the insulation layer 34 is an insulation member, and the insulation member is connected to the first connection portion 31. That is, the insulating layer 34 and the connecting member 30 are of a split type structure. The insulating member is of annular configuration and surrounds the cell 10.

The heat insulating member is clamped to the first connecting portion 31, that is, the heat insulating member and the first connecting portion 31 may be connected by interference connection. The heat insulating member is connected to the first connecting portion 31 in an interference manner, so that the heat insulating member is limited, and the welding areas of the heat insulating member, the first shell member 21 and the second shell member 22 are aligned, so that the battery cell 10 is protected. The material of the heat insulating member may be glass fiber, asbestos, rock wool, silicate, aerogel blanket, vacuum plate, or heat insulating ceramic, etc.

Optionally, the heat insulating layer 34 may further cover a side surface of the first connection portion 31, where the side surface of the first connection portion 31 is a surface between a top surface and a bottom surface of the first connection portion 31, the bottom surface of the first connection portion 31 is a surface of the first connection portion 31 near the battery cell, and the top surface of the first connection portion 31 is a surface of the first connection portion 31 far from the battery cell. The heat insulating layer 34 may include a first heat insulating portion covering the bottom surface of the first connection portion 31, a second heat insulating portion and a third heat insulating portion respectively located at both sides of the first connection portion 31.

Alternatively, the thickness of the insulating layer 34 is 0-2mm, e.g., the thickness of the insulating layer 34 is 0.1mm, 0.2mm, 0.5mm, 0.8mm, 1mm, 1.3mm, 1.6mm, 2mm, etc.

Exemplary embodiments of the present disclosure also provide a battery device including the above battery.

Wherein, the battery includes: the battery cell 10, the shell 20 and the connecting piece 30, wherein the shell 20 comprises a first shell piece 21, a second shell piece 22 and the connecting piece 30, the first shell piece 21 and the second shell piece 22 are oppositely arranged, the first shell piece 21 and the second shell piece 22 form a containing cavity, and the battery cell 10 is arranged in the containing cavity; the connector 30 has a first connection portion 31, the first connection portion 31 is provided between the case 20 and the battery cell 10, and the first connection portion 31 is welded to the first case member 21 and the second case member 22, respectively.

The battery device provided by the embodiment of the disclosure includes a battery, a battery core 10 is arranged in a shell 20 in the battery, the shell 20 includes a first shell piece 21 and a second shell piece 22, the first shell piece 21 and the second shell piece 22 form a containing cavity, the battery core 10 is arranged in the containing cavity, a first connecting part 31 is arranged between the battery core 10 and the shell 20, the first connecting part 31 is welded with the first shell piece 21 and the second shell piece 22 respectively, and the difficulty of connecting the first shell piece 21 and the second shell piece 22 is reduced, so that the battery yield can be improved, and the cost of the battery device is effectively controlled.

The battery provided by the embodiment of the disclosure can be applied to an electric vehicle, and when the battery is used for the electric vehicle, the battery can be integrated into a battery pack, and the battery pack is installed on the electric vehicle to provide energy for the electric vehicle.

In practice, the battery pack may be mounted to the frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modularized battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A battery, the battery comprising:

a battery cell;

2. The battery of claim 1, wherein the connector further comprises:

the heat insulation layer is arranged at least on one side of the first connecting part, which is close to the battery cell.

3. The battery of claim 1, wherein the first housing member comprises:

a first panel;

the first frame is arranged on one side of the first panel, which faces the second shell piece, and the first frame and the first panel enclose a first sub-accommodating cavity;

the second housing member includes:

a second panel;

the second frame is arranged on one side, facing the first panel, of the second panel, the second frame and the second panel enclose a second sub-accommodating cavity, and the first sub-accommodating cavity and the second sub-accommodating cavity form the accommodating cavity.

4. The battery of claim 3, wherein the first connection portion is welded to the first frame and the second frame, respectively.

5. The battery of claim 3, wherein the first panel and the second panel are parallel and a gap is provided between the first frame and the second frame.

6. The battery of claim 1, wherein there is a gap between the first housing member and the second housing member, the connector further comprising:

and the supporting part penetrates through a gap between the first shell piece and the second shell piece and is connected with the first connecting part.

7. The battery of claim 1 or 6, wherein the connector further comprises:

the second connecting part is arranged on one side, far away from the battery cell, of the shell, and the second connecting part is welded with the first shell piece and the second shell piece respectively.

8. The battery of claim 7, wherein the second connection portion is connected to the support portion.

9. The battery of claim 6, wherein an end of the support portion remote from the first connection portion does not protrude from a side of the case remote from the first connection portion.

10. The battery of claim 1 or 6, wherein the cell comprises:

a first sub-cell located within the first housing member;

a second sub-cell located within the second housing member;

the battery further includes:

the support plate is positioned between the first sub-battery cell and the second sub-battery cell, and is connected with the first connecting part.

11. The battery of claim 7, wherein an orthographic projection of the first connection portion on the housing in a first direction has a first region and a second region, the first region being located on the first housing member and the second region being located on the second housing member, the first direction being a direction perpendicular to a face of the housing to which the first connection portion is connected;

the orthographic projection of the second connecting portion on the housing along the first direction comprises a third area and a fourth area, wherein the third area is positioned on the first housing piece, and the fourth area is positioned on the second housing piece.

12. The battery of claim 7, wherein an orthographic projection of the first connection portion on the second connection portion coincides with the second connection portion.

13. The battery of claim 3, wherein said housing includes two oppositely disposed first surfaces and a plurality of second surfaces located between said two first surfaces, said first surfaces having an area greater than an area of either of said second surfaces;

the first panel and the second panel are respectively a first surface of the shell, and the first frame and the second frame form a second surface.

14. The battery of claim 2, wherein the insulating layer has a thickness of 0-2mm.

15. A battery device comprising a battery according to any one of claims 1-14.