CN219017845U

CN219017845U - Battery and electricity utilization device

Info

Publication number: CN219017845U
Application number: CN202223180809.6U
Authority: CN
Inventors: 余凯勤; 张小淋; 陈贵泽; 赵佩杰; 张晓�
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-05-12
Anticipated expiration: 2032-11-29
Also published as: WO2024114131A1

Abstract

The application discloses a battery and power consumption device belongs to battery technical field. The battery comprises a battery cell group, wherein the battery cell group comprises a plurality of battery cells which are arranged in a laminated way; the insulating piece is connected with the battery monomer group; the box body is used for accommodating the battery cell group and the insulating piece; the insulating piece comprises a main body part and an extension part, wherein the main body part is positioned at one side of the battery unit group in the first direction, the extension part is positioned at one side of the battery unit group in the second direction, the second direction is perpendicular to the first direction, the extension part is connected to the main body part, and the extension part is supported between the battery unit group and the inner wall of the box body. When the battery monomer is assembled into the box body, the extension part can pre-support and separate the battery monomer from the inner wall of the box body, so that friction is generated between the surface of the battery monomer and the inner wall of the box body when the battery monomer is assembled into the box body along the first direction, the surface of the battery monomer is damaged, and the service life of the battery monomer is prolonged.

Description

Battery and electricity utilization device

Technical Field

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

Background

Batteries are widely used in electronic devices such as cellular phones, notebook computers, battery cars, electric vehicles, electric airplanes, electric ships, electric toy vehicles, electric toy ships, electric toy airplanes, electric tools, and the like.

In addition to improving the performance of the battery cells, the lifetime of the battery cells is also a concern in the development of battery technology.

Therefore, how to increase the lifetime of the battery cell is a problem to be solved in battery technology.

Disclosure of Invention

In view of the above, the present application provides a battery and an electric device capable of improving the life of a battery cell.

In a first aspect, the present application provides a battery, including a battery cell stack including a plurality of battery cells arranged in a stacked arrangement; the insulating piece is connected with the battery monomer group; the box body is used for accommodating the battery cell group and the insulating piece; the insulating piece comprises a main body part and an extension part, wherein the main body part is positioned at one side of the battery unit group in the first direction, the extension part is positioned at one side of the battery unit group in the second direction, the second direction is perpendicular to the first direction, the extension part is connected to the main body part, and the extension part is supported between the battery unit group and the inner wall of the box body.

In the technical scheme of this embodiment, the insulating part includes main part and extension, and main part is located battery monomer group one side in first direction, and extension is located battery monomer group one side in the second direction, and second direction and first direction are perpendicular, and extension is connected in main part, and extension supports between battery monomer group and the inner wall of box. By means of the design, when the battery monomer is assembled into the box body, the extending part can pre-support and separate the battery monomer from the inner wall of the box body, friction between the surface of the battery monomer and the inner wall of the box body is reduced when the battery monomer is assembled into the box body along the first direction, the surface damage risk of the battery monomer is caused, and the service life of the battery monomer is prolonged.

In some embodiments, the plurality of battery cells are stacked along a third direction, the third direction being perpendicular to the first direction and the second direction.

In some embodiments, the extension has a first surface facing the battery cell stack, the first surface being provided with a positioning portion configured to face the groove structure of the battery cell to accommodate at least a portion of the battery cell near an end of the extension in the second direction. By means of the design, the part of the end part of the battery monomer is supported by the positioning part of the groove structure, when the battery monomer is assembled into the box body, the risk of damage to the surface of the battery monomer due to shaking of the battery monomer and friction of the inner wall of the box body is reduced, and the service life of the battery monomer is prolonged.

In some embodiments, the positioning portions are configured in a plurality of numbers, and the plurality of positioning portions are in one-to-one correspondence with ends of the plurality of battery cells, which are close to the extension portions along the second direction. By means of the design, the end parts of each battery cell are supported by the positioning parts of the groove structures, and when the battery cells are assembled into the box body, the risk of damage to the surfaces of the battery cells due to friction between adjacent battery cells is reduced.

In some embodiments, the extension part has a second surface facing away from the battery cell group, the second surface is formed with first protrusions at positions corresponding to the positioning parts in the thickness direction, and a concave part is formed between two adjacent first protrusions; the recess at least partially overlaps with a gap between two adjacent battery cells, as viewed in the second direction. In the design, in the process that the battery monomer group is pushed into the box body along the first direction, the first convex part can extrude part of the adhesive pre-coated on the inner wall of the box body into the concave part, and as the gap between the concave part and the adjacent two battery monomers is at least partially overlapped, part of the adhesive extruded into the concave part can be used for connecting the adjacent two battery monomers so as to pre-fix the adjacent two battery monomers, thereby reducing the risk of surface damage of the battery monomers caused by shaking of the battery monomers.

In some embodiments, the first surface is formed with a second convex portion at a position corresponding to the concave portion in the thickness direction. By means of the design, the second protruding portion can provide supporting force along the third direction for two adjacent battery cells, the risk that the battery cells are greatly deflected is reduced, and the stability of the battery cells is improved.

In some embodiments, the second protrusions are configured in plurality and spaced apart along the third direction, and the largest dimension of adjacent two second protrusions along the third direction is different. By the design, the positioning part is easier to identify, the battery monomer is effectively prevented from being foolproof when being installed in the positioning part, and the assembly efficiency of the battery is improved.

In some embodiments, the cross-sectional shape of the extension along the first direction is wavy. The section shape along the first direction is wavy extension self has towards the single concave part of battery, and the concave part can support in single bottom of battery, improves single stability of battery after the box is packed into to the single group of battery, and the processing degree of difficulty of wavy extension is lower simultaneously.

In some embodiments, a buffer is provided between the extension and the battery cell stack. By means of the design, after the battery monomer is assembled into the box body, friction between the battery monomer and the box body can be reduced by the buffer piece, so that the surface damage risk of the battery monomer is caused, and the service life of the battery monomer is prolonged.

In some embodiments, the extension portion and the body portion are integrally formed. By the design, the production period of the insulating piece is shortened, and the stress consistency of the insulating piece is improved.

In some embodiments, the extension is folded from the body portion. By means of the design, the extending part can be formed by bending the part of the main body part, which exceeds the battery monomer group, towards the battery monomer group after the insulating part is machined, so that the forming difficulty of the extending part is reduced, and the cost is low.

In some embodiments, the battery cells are pouch battery cells.

In some embodiments, the battery further includes a bus member disposed on a side surface of the main body portion facing away from the battery cell, and an opening is disposed on the main body portion, and a tab of the battery cell passes through the opening to be connected with the bus member.

In some embodiments, the maximum dimension of the extension in the first direction is less than or equal to the maximum dimension of the battery cell in the first direction. In the process of assembling the battery monomer into the box body, the end part of the battery monomer is easier to rub with the inner wall of the box body, and due to the design, the extension part at least covers the end part of the battery monomer, so that the risk of damage to the surface of the battery monomer is reduced.

In some embodiments, the insulating member is provided at both sides of the battery cell group in the first direction. By the design, the structures of the two sides of the battery cell group along the first direction are approximately the same, and after the battery cell group is assembled into the box body, the possibility of deflection of the battery cell group in the first direction is reduced, and the reliability of the battery cell is improved.

In some embodiments, the maximum dimension of the extension in the first direction is less than or equal to half of the maximum dimension of the battery cell in the first direction. By the design, the extension part has the advantages that the damage risk of the surface of the end part of the battery cell is reduced, the length of the extension part is controlled within a reasonable range, and the cost is reduced.

In a second aspect, the present application provides an electrical device, where the electrical device includes a battery in the foregoing embodiment, and the battery is configured to provide electrical energy.

The foregoing description is merely an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make other objects, features and advantages of the present application more understandable, the following specific embodiments of the present application are specifically described below.

Drawings

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

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

fig. 2 is a schematic structural view of a battery according to some embodiments of the present application;

FIG. 3 is a schematic structural view of an insulator according to some embodiments of the present application;

FIG. 4 is a schematic structural view of an extension of some embodiments of the present application;

FIG. 5 is a schematic structural view of an extension of further embodiments of the present application;

fig. 6 is a schematic structural view of an extension portion according to still other embodiments of the present application.

Reference numerals in the specific embodiments are as follows:

100-vehicle; 30-a controller; 20-motor;

10-battery; 1-a box body; 2-battery cells; 3-an insulator; 31-a main body; 311-opening; 32-extensions; 321-a first surface; 322-a second surface; 323-a positioning part; 324-first protrusions; 325-recess; 326-a second protrusion; 4-a confluence part; x-a first direction; y-a second direction; z-third direction.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

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

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

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 sheets" refers to two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

The batteries mentioned in the art can be classified into disposable batteries and rechargeable batteries according to whether they are rechargeable or not. The types of rechargeable batteries that are currently common are: lead acid batteries, nickel hydrogen batteries, and lithium ion batteries. Lithium ion batteries are widely used in pure electric vehicles and hybrid electric vehicles at present, and the capacity of the lithium ion batteries used for the purposes is relatively slightly low, but the lithium ion batteries have larger output and charging current, longer service life and higher cost.

The battery described in the embodiments of the present application refers to a rechargeable battery. Hereinafter, embodiments disclosed herein will be described mainly by taking lithium ion batteries as examples. It should be appreciated that the embodiments disclosed herein are applicable to any other suitable type of rechargeable battery. The batteries referred to in the embodiments disclosed herein may be used directly or indirectly in a suitable power device to power the power device.

Reference to a battery in embodiments of the present disclosure refers to a single physical module that includes one or more battery cells to provide a predetermined voltage and capacity. The battery cells are basic units in the battery, and can be generally divided into: cylindrical battery cells, cuboid battery cells and soft package battery cells. Hereinafter, it will be mainly spread around the pouch battery cell. It should be understood that the embodiments described hereinafter are also applicable in certain respects to cylindrical battery cells or rectangular parallelepiped battery cells.

The soft package battery is another name of polymer battery, and has the advantages of small volume, light weight, high specific energy, high safety, flexible design and the like compared with the lithium ion battery.

In some high power applications, such as electric vehicles, the application of batteries includes three levels: battery cell, battery module, and battery. The battery module is formed by electrically connecting a certain number of battery cells together and putting the same into one frame in order to protect the battery cells from external impact, heat, vibration, etc. The battery refers to the final state of the battery system incorporated into the electric vehicle. The battery generally includes a case for enclosing one or more battery cells.

The battery cell of the battery cell consists of a positive pole piece, a negative pole piece and an isolating film. The battery cell mainly relies on metal ions to move between the positive pole piece and the negative pole piece to work. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on part of the surface of the positive electrode current collector, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on part of the surface of the negative electrode current collector, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode lug. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like.

The positive pole piece, the negative pole piece and the isolating film of the soft package battery monomer are alternately stacked together to form a multi-layer laminated battery cell, the battery cell is packaged by the aluminum plastic packaging film to form a battery monomer, and at least part of the positive pole lug and the negative pole lug of the soft package battery monomer extend out of the aluminum plastic packaging film and are used for leading out electric energy of the battery cell.

Because the mechanical strength of the pole ear of the soft-package battery monomer is weaker, the pole ear of the soft-package battery monomer is usually required to be supported by a copper bar fixed on the wire harness isolation plate during grouping, and is generally welded on the copper bar after passing through the wire harness isolation plate. In some cases, in order to increase the connection strength between the soft battery cell and the inner wall of the box body, an adhesive is coated on the inner wall of the box body along the direction in which the soft battery cell is mounted in the box body before the soft battery cell is mounted in the box body. After the soft package battery monomer is put into the box body, the soft package battery monomer can be connected with the inner wall of the box body through an adhesive besides being connected with the wire harness isolation plate.

The inventor notes that after the battery monomer is assembled with the box body, the condition that the battery system prompts the battery to be out of order occurs after the battery monomer is used for a period of time. The reasons for the occurrence of the above situation are numerous, such as electrolyte leakage, line leakage, etc., and the life of the battery cell is low.

The inventor further researches and discovers that the situation may be caused by the damage of the outer surface of the battery cell due to excessive friction between the outer surface of the battery cell and the inner wall of the box body in the process of assembling the battery cell with the box body after the battery cell is assembled. The damage of the outer surface of the battery monomer means that the insulating film of the battery monomer is damaged, the probability of abnormal insulation of the battery monomer is obviously improved, and the service life of the battery monomer is naturally reduced. And because the soft package battery is packaged by adopting an aluminum plastic film, the mechanical strength is low, and the probability of damage after friction with the inner wall of the box body is higher.

Based on the above considerations, in order to solve the problem that the service life of the battery is reduced due to the damage of the surface of the battery cell in the battery assembly process, the inventor has conducted intensive studies and designed a battery, which includes a battery cell group including a plurality of battery cells stacked, an insulating member connected with the battery cell group, and a case for accommodating the battery cell group and the insulating member. The insulating piece comprises a main body part and an extension part, wherein the extension part is connected with the main body part, and the extension part is supported between the battery cell group and the inner wall of the box body. When the battery monomer is assembled into the box body, the risk of damage to the surface of the battery monomer caused by excessive friction between the battery monomer and the inner wall of the box body is reduced, and the service life of the battery monomer is prolonged.

The technical scheme described in the embodiment of the application is applicable to battery monomers, batteries and power utilization devices using the batteries.

Electrical devices include, but are not limited to: cell phones, portable devices, notebook computers, battery cars, electric vehicles, boats, spacecraft, electric toys, and electric tools, etc., for example, spacecraft including airplanes, rockets, space planes, and spacecraft, etc., electric toys including fixed or mobile electric toys, for example, game machines, electric vehicle toys, electric ship toys, and electric plane toys, etc., electric tools including metal cutting electric tools, grinding electric tools, fitting electric tools, and railway electric tools, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact electric drills, concrete vibrators, and electric planers. Electrical devices include, but are not limited to: cell phones, portable devices, notebook computers, battery cars, electric vehicles, boats, spacecraft, electric toys, and electric tools, etc., for example, spacecraft including airplanes, rockets, space planes, and spacecraft, etc., electric toys including fixed or mobile electric toys, for example, game machines, electric vehicle toys, electric ship toys, and electric plane toys, etc., electric tools including metal cutting electric tools, grinding electric tools, fitting electric tools, and railway electric tools, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact electric drills, concrete vibrators, and electric planers.

For convenience of description, the following embodiments will take an electric device according to an embodiment of the present application as an example of the vehicle 100.

For example, fig. 1 is a schematic structural diagram of a vehicle 100 according to some embodiments of the present application, where the vehicle 100 may be a fuel-oil vehicle, a gas-fuel vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended range vehicle. The motor 20, the controller 30, and the battery 10 may be disposed inside the vehicle 100, and the controller 30 is configured to control the battery 10 to supply power to the motor 20. For example, the battery 10 may be provided at the bottom or the head or tail of the vehicle 100. The battery 10 may be used to power the vehicle 100, for example, the battery 10 may be used as an operating power source for the vehicle 100, for the circuitry of the vehicle 100, for example, for starting, navigating, and operating power requirements of the vehicle 100 when in operation. In another embodiment of the present application, battery 10 may not only serve as an operating power source for vehicle 100, but may also serve as a driving power source for vehicle 100, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 100.

To meet different power requirements, the battery 10 may include a plurality of battery cells 2, wherein the plurality of battery cells 2 may be connected in series or parallel or a series-parallel connection, and the series-parallel connection refers to a mixture of series and parallel connection. The battery 10 may also be referred to as a battery pack. Alternatively, the plurality of battery cells 2 may be connected in series or parallel or series-parallel to form a battery module, and then connected in series or parallel or series-parallel to form the battery 10. That is, the plurality of battery cells 2 may be directly assembled into the battery 10, or may be assembled into a battery module, and the battery module may be assembled into the battery 10.

For example, referring to fig. 2, fig. 2 is a schematic structural diagram of a battery 10 according to some embodiments of the present application, and the battery 10 may include a plurality of battery cells 2. The battery 10 may further include a case 1, wherein the case 1 has a hollow structure, and a plurality of battery cells 2 are accommodated in the case 1. In some embodiments, as shown in fig. 2, the case 1 may include a surrounding frame provided with an assembly opening on at least one side in the first direction X to load the battery cell 2 into the case 1. The shape of the enclosure frame may be determined according to the shape of the combination of the plurality of battery cells 2. The case 1 may further include a side plate corresponding to the assembly opening, the side plate being for closing the assembly opening, so that the case 1 forms a closed receiving space for receiving the battery cell 2.

The plurality of battery cells 2 are mutually connected in parallel or in series-parallel combination and then are arranged in the box body 1. In some embodiments, referring to fig. 2, after the plurality of battery cells 2 are grouped, they can be pushed into the case 1 from the assembly opening along the first direction X, and then the assembly opening is closed by the side plates to complete the assembly of the battery 10.

Alternatively, the battery 10 may further include other structures, which are not described in detail herein. For example, a harness isolation board is further disposed in the general case 1, and a bus member 4 is generally disposed on the harness isolation board, and a plurality of battery cells 2 can be connected in parallel or in series through welding the bus member 4 and the tabs of the battery cells 2.

According to some embodiments of the present application, referring to fig. 2 and 3, there is provided a battery 10, the battery 10 including a battery cell 2 group, the battery cell 2 group including a plurality of battery cells 2 arranged in a stacked manner; an insulating member 3 connected to the battery cell 2 group; a case 1 for accommodating a group 2 of battery cells and an insulating member 3; wherein, the insulator 3 includes a main body 31 and an extension portion 32, the main body 31 is located at one side of the battery cell 2 set in the first direction X, the extension portion 32 is located at one side of the battery cell 2 set in the second direction Y, the second direction Y is perpendicular to the first direction X, the extension portion 32 is connected to the main body 31, and the extension portion 32 is supported between the battery cell 2 set and the inner wall of the case 1.

The insulator 3 may be a wire harness isolation plate or the like. In some embodiments, the insulating member 3 is a wire harness isolation board, and the tabs of the battery unit 2 pass through the wire harness isolation board and are welded with copper bars on the wire harness isolation board, so that the connection between the battery unit 2 and the wire harness isolation board is realized.

The first direction X is the longitudinal direction of the battery cell 2, and the second direction Y is the width direction of the battery cell 2. Referring to fig. 2, in some embodiments, a group of battery cells 2 enters a case 1 along a first direction X.

The battery cell 2 group may be provided with an insulating member 3 at one side or both sides in the first direction X.

The extension 32 may have a size in the first direction X that is less than or equal to the size of the battery cell 2 in the first direction X.

The extension 32 may be a flat plate, a side bent from the end plate of the body 31 toward the battery cell 2 group, a corrugated plate, or the like.

The extension portion 32 and the main body portion 31 may be integrally injection molded, the extension portion 32 may be bent from one end of the main body portion 31, and the extension portion 32 may be connected to the main body portion 31 by a fastener.

The material of the insulator 3 may be rubber, plastic, or the like.

In the technical scheme of this embodiment, insulator 3 includes main part 31 and extension 32, and main part 31 is located the one side of battery monomer 2 group in first direction X, and extension 32 is located the one side of battery monomer 2 group in second direction Y, and second direction Y is perpendicular with first direction X, and extension 32 is connected in main part 31, and extension 32 supports between the inner wall of battery monomer 2 group and box 1. By means of the design, when the battery monomer 2 is assembled into the box body 1, the extending part 32 can pre-support and separate the battery monomer 2 from the inner wall of the box body 1, friction between the surface of the battery monomer 2 and the inner wall of the box body 1 when the battery monomer 2 is assembled into the box body 1 along the first direction X is reduced, the surface damage risk of the battery monomer 2 is caused, and the service life of the battery monomer 2 is prolonged.

According to some embodiments of the present application, the plurality of battery cells 2 are arranged in a stack along a third direction Z, which is perpendicular to the first direction X and the second direction Y.

The third direction Z is the lamination direction of the battery cells 2 in the battery cell 2 group.

According to some embodiments of the present application, referring to fig. 2 and 4, the extension portion 32 has a first surface 321 facing the battery cell 2 group, the first surface 321 is provided with a positioning portion 323, and the positioning portion 323 is configured to face the groove structure of the battery cell 2 to accommodate at least a portion of the end portion of the battery cell 2 adjacent to the extension portion 32 along the second direction Y.

The positioning portion 323 may have a U-shape, V-shape, arc shape, etc. in cross-section along the second direction Y.

The dimension of the positioning portion 323 of the groove structure in the third direction Z may be equal to or greater than the dimension of the battery cell 2 in the third direction Z.

The positioning portion 323 may be provided in one or more, and, for example, the positioning portion 323 is one, and the size of the positioning portion 323 in the third direction Z is greater than the sum of the sizes of all the battery cells 2 in the third direction Z. The number of the positioning parts 323 may be greater than the number of the battery cell 2 groups.

When the battery cell 2 is connected to the insulator 3, the positioning portion 323 guides and positions the battery cell in advance, so that the assembly efficiency of the battery 10 can be improved to some extent.

By means of the design, the part of the end part of the battery monomer 2 is supported by the positioning part 323 of the groove structure, when the battery monomer 2 is assembled into the box body 1, the risk of damage to the surface of the battery monomer 2 due to the fact that the battery monomer 2 shakes and rubs against the inner wall of the box body 1 is reduced, and the service life of the battery monomer 2 is prolonged.

According to some embodiments of the present application, referring to fig. 2 and 4, the positioning portions 323 are configured in a plurality of numbers, and the plurality of positioning portions 323 corresponds to the plurality of battery cells 2 in the second direction Y near the ends of the extending portions 32 one by one.

The distance between adjacent positioning portions 323 in the third direction Z may be the same or different.

By means of the design, the end part of each battery cell 2 is supported by the positioning part 323 of the groove structure, and when the battery cells 2 are assembled into the box body 1, the risk of damage to the surface of the battery cell 2 due to friction between adjacent battery cells 2 is reduced.

According to some embodiments of the present application, referring to fig. 2 and 5, the extension portion 32 has a second surface 322 facing away from the battery cell 2, the second surface 322 is formed with first protrusions 324 at positions corresponding to the positioning portions 323 in the thickness direction, and a recess 325 is formed between two adjacent first protrusions 324; the recess 325 at least partially overlaps with the gap between the adjacent two battery cells 2, as viewed in the second direction Y.

The cross-sectional shape of the first protrusion 324 along the second direction Y may be rectangular, semicircular, triangular, or the like.

The cross-sectional shape of the recess 325 in the second direction Y may be U-shaped, arc-shaped, V-shaped, or the like.

When the battery cells 2 are pushed into the case 1 along the first direction X, the first protrusion 324 pushes part of the adhesive to flow into the area where the recess 325 is located along the direction, and the adhesive flowing into the recess 325 may extend into the gap between two adjacent battery cells 2 due to the space below the recess 325.

In this design, during the process of pushing the battery cell 2 set into the case 1 along the first direction X, the first protruding portion 324 may squeeze a portion of the adhesive pre-coated on the inner wall of the case 1 into the recess 325, and since the recess 325 is at least partially overlapped with the gap between two adjacent battery cells 2, the portion of the adhesive squeezed into the recess 325 may be used to connect the two adjacent battery cells 2, so as to pre-fix the two adjacent battery cells 2, thereby reducing the risk of damage to the surface of the battery cell 2 caused by shaking of the battery cell 2.

According to some embodiments of the present application, referring to fig. 2 and 6, the first surface 321 is formed with a second protrusion 326 at a position corresponding to the recess 325 in the thickness direction.

In some embodiments, referring to fig. 6, the thickness direction is the second direction Y.

The cross-sectional shape of the second protrusion 326 along the second direction Y may be rectangular, triangular, semicircular, semi-annular, etc.

By adopting the design, the second convex part 326 can provide the supporting force along the third direction Z for two adjacent battery cells 2, so that the risk of large deflection of the battery cells 2 is reduced, and the stability of the battery cells 2 is improved.

According to some embodiments of the present application, the second protrusions 326 are configured in a plurality and are disposed at intervals along the third direction Z, and the maximum sizes of two adjacent second protrusions 326 along the third direction Z are different.

In the third direction Z, the adjacent second convex portions 326 have different maximum sizes, which can be visually distinguished, and the positioning portions 323 for supporting the battery cells 2 are provided between the adjacent second convex portions 326, so that interference generated by the vision can be reduced when the battery cells 2 are mounted in the positioning portions 323, and foolproof is effective.

By such a design, the positioning part 323 is easier to identify, and the battery cell 2 is effectively prevented from being foolproof when being assembled into the positioning part 323, so that the assembly efficiency of the battery 10 is improved.

Referring to fig. 2 and 6, according to some embodiments of the present application, the cross-sectional shape of the extension 32 along the first direction X is wavy.

The cross-sectional shape of the extension 32 in the first direction X is wavy, meaning that the extension 32 itself has a concave portion facing the battery cell 2, which can be used to support the end of the battery cell 2.

The extending portion 32 with the wavy cross section along the first direction X is provided with a concave portion facing the battery cell 2, the concave portion can be supported at the bottom of the battery cell 2, stability of the battery cell 2 after the battery cell 2 is assembled into the box body 1 is improved, and meanwhile machining difficulty of the wavy extending portion 32 is low.

According to some embodiments of the present application, a buffer is provided between the extension 32 and the battery cell 2 group.

The particular material of the cushioning member is not limited and it may be desirable to have some ability to deform and to recover at least some of the deformation when the external force is removed. For example, it may be foam or rubber.

The buffer member is not limited in its rotation, and may be plate-like, block-like or other shape.

In some embodiments, the cross-sectional shape of the extension 32 along the first direction X is wavy, and the cross-sectional shape of the bumper along the first direction X is wavy, and the bumper is attached to the first surface 321.

By means of the design, after the battery monomer 2 is assembled into the box body 1, friction between the battery monomer 2 and the box body 1 can be reduced by the buffer piece, so that the surface of the battery monomer 2 is damaged, and the service life of the battery monomer 2 is prolonged.

According to some embodiments of the present application, extension 32 and body 31 are integrally formed.

The extension 32 and the body 31 may be integrally formed by injection molding or the like.

The extension portion 32 and the main body portion 31 are integrally formed, and compared with the mode that the extension portion 32 and the main body portion 31 are connected together by means of fasteners, bonding or the like after being formed in a split mode, the whole stress consistency of the insulating piece 3 is good because no gap exists between the extension portion 32 and the main body portion 31.

By the design, the production period of the insulating piece 3 is shortened, and the stress consistency of the insulating piece 3 is improved.

In some embodiments, the extension 32 is folded from the body 31. By means of the design, the extending part 32 can be formed by bending the part, exceeding the battery cell 2 group, of the main body part 31 towards the battery cell 2 group after the insulating part 3 is machined, so that the forming difficulty of the extending part 32 is reduced, and the cost is low.

According to some embodiments of the present application, the battery cell 2 is a pouch battery cell 2.

According to some embodiments of the present application, referring to fig. 2 and 3, the battery 10 further includes a bus member 4, the bus member 4 is disposed on a side surface of the main body 31 facing away from the battery cell 2, an opening 311 is disposed on the main body 31, and a tab of the battery cell 2 passes through the opening 311 to be connected with the bus member 4.

One or more openings 311 may be provided in the body portion 31.

In the embodiment in which the battery cells 2 are soft-pack battery cells 2, each battery cell 2 corresponds to two openings 311, the two openings 311 respectively correspond to two tabs of the battery cell 2, and the tabs are welded with the bus member 4 after being bent from the openings 311 through the main body 31.

The confluence member 4 may be copper bar provided on the main body portion 31.

According to some embodiments of the present application, referring to fig. 2, a maximum dimension of the extension 32 in the first direction X is less than or equal to a maximum dimension of the battery cell 2 along the first direction X.

The maximum dimension of the extension 32 in the first direction X is less than or equal to the maximum dimension of the battery cell 2 in the first direction X, meaning that the extension 32 is at least at the end of the battery cell 2 in the first direction X. In some embodiments, referring to fig. 2, the body portion 31 and the extension portion 32 half wrap around one corner of the battery cell 2.

In the process of assembling the battery cell 2 into the box body 1, friction is generated between the end part of the battery cell 2 and the inner wall of the box body 1 more easily, and the design ensures that the extension part 32 at least covers the end part of the battery cell 2, so that the risk of damage to the surface of the battery cell 2 is reduced.

According to some embodiments of the present application, both sides of the group of battery cells 2 in the first direction X are provided with insulators 3.

The insulating members 3 of the battery cell 2 groups on both sides in the first direction X may have the same or different structures.

In some embodiments, the insulating members 3 of the battery cell 2 set on two sides along the first direction X are different in structure, wherein the first surface 321 of the extension portion 32 of one insulating member 3 is provided with the positioning portion 323, the extension portion 32 of the other insulating member 3 is in a flat plate structure, one end of the battery cell 2 is located in the positioning portion 323, and the other end of the battery cell 2 abuts against the upper surface of the flat plate structure.

By the design, the structures of the two sides of the battery cell 2 group along the first direction X are approximately the same, and after the battery cell 2 group is assembled into the box body 1, the possibility that the battery cell 2 group deflects in the first direction X is reduced, and the reliability of the battery cell 2 is improved.

According to some embodiments of the present application, referring to fig. 2, the maximum dimension of the extension 32 in the first direction X is less than or equal to half of the maximum dimension of the battery cell 2 along the first direction X.

By such design, the extension part 32 has the advantages of reducing the damage risk of the end surface of the battery cell 2, controlling the length of the extension part 32 within a reasonable range and reducing the cost.

According to some embodiments of the present application, there is also provided an electrical device comprising a battery 10 as described in any of the above aspects, the battery 10 being configured to provide electrical energy.

Referring to fig. 2, 3 and 6, according to some embodiments of the present application, a battery 10 is provided, where the battery 10 includes a battery cell 2 set, a case 1 and an insulating member 3.

The battery cell 2 group includes a plurality of battery cells 2 of range upon range of setting, and battery cell 2 is soft package battery cell 2, and a plurality of battery cells 2 range upon range of setting along third direction Z, and third direction Z is perpendicular to first direction X and second direction Y. The insulator 3 is connected with the group of battery cells 2. The case 1 is for accommodating a group of battery cells 2 and an insulating member 3.

Wherein, the insulator 3 includes a main body 31 and an extension portion 32, the main body 31 is located at one side of the battery cell 2 set in the first direction X, the extension portion 32 is located at one side of the battery cell 2 set in the second direction Y, the second direction Y is perpendicular to the first direction X, the extension portion 32 is connected to the main body 31, and the extension portion 32 is supported between the battery cell 2 set and the inner wall of the case 1.

The extension 32 has a first surface 321 facing the group of cells 2, the first surface 321 being provided with a positioning portion 323, the positioning portion 323 being configured as a groove structure facing the cells 2 to accommodate at least part of the cells 2 near the end of the extension 32 in the second direction Y. The extension portion 32 has a second surface 322 facing away from the battery cell 2 group, the second surface 322 is formed with first protrusions 324 at positions corresponding to the positioning portions 323 in the thickness direction, and a recess 325 is formed between two adjacent first protrusions 324; the recess 325 at least partially overlaps with the gap between the adjacent two battery cells 2, as viewed in the second direction Y. The first surface 321 is formed with a second convex portion 326 at a position corresponding to the concave portion 325 in the thickness direction.

Before the battery cell 2 group is put into the box along the first direction X, the battery cell 2 is placed in the positioning portion 323 to be preloaded, and then all the battery cells 2 are connected with the insulating member 3 to form the battery cell 2 group. Then, the battery cell 2 group is pushed into the box body 1 along the first direction X, and the assembly of the battery cell 2 and the box body 1 is completed.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution 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 scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A battery, comprising:

the battery cell group comprises a plurality of battery cells which are arranged in a laminated way;

the insulating piece is connected with the battery monomer group;

a case for accommodating the battery cell group and the insulating member;

the insulating piece comprises a main body part and an extending part, wherein the main body part is positioned at one side of the battery unit group in the first direction, the extending part is positioned at one side of the battery unit group in the second direction, the second direction is perpendicular to the first direction, the extending part is connected with the main body part, and the extending part is supported between the battery unit group and the inner wall of the box body.

2. The battery of claim 1, wherein the plurality of battery cells are stacked along a third direction, the third direction being perpendicular to the first direction and the second direction.

3. The battery of claim 2, wherein the extension has a first surface facing the battery cell stack, the first surface being provided with a locating portion configured to face a groove structure of the battery cell to accommodate at least a portion of the battery cell proximate an end of the extension in the second direction.

4. The battery according to claim 3, wherein the positioning portions are arranged in plural, the positioning portions being in one-to-one correspondence with ends of the plurality of battery cells near the extension portion in the second direction.

5. The battery according to claim 3, wherein the extension portion has a second surface facing away from the battery cell group, the second surface being formed with first protrusions at positions corresponding to the positioning portions in the thickness direction, and a recess is formed between adjacent two of the first protrusions;

the recess at least partially overlaps with a gap between two adjacent battery cells, as viewed in the second direction.

6. The battery according to claim 5, wherein the first surface is formed with a second convex portion at a position corresponding to the concave portion in the thickness direction.

7. The battery according to claim 6, wherein the second protrusions are arranged in plural and spaced apart in the third direction, and the largest dimensions of adjacent two of the second protrusions in the third direction are different.

8. The battery of claim 1, wherein the cross-sectional shape of the extension along the first direction is wavy.

9. The battery of any one of claims 1-8, wherein a buffer is provided between the extension and the battery cell stack.

10. The battery of any one of claims 1-8, wherein the extension portion and the body portion are integrally formed.

11. The battery of any one of claims 1-8, wherein the extension is folded from the body portion.

12. The battery of any one of claims 1-8, wherein the battery cell is a pouch cell.

13. The battery according to any one of claims 1 to 8, further comprising a bus member provided on a side surface of the main body portion facing away from the battery cell, an opening being provided in the main body portion, and tabs of the battery cell passing through the opening to be connected with the bus member.

14. The battery of any of claims 1-8, wherein a maximum dimension of the extension in the first direction is less than or equal to a maximum dimension of the battery cell in the first direction.

15. The battery according to any one of claims 1 to 8, wherein both sides of the battery cell group in the first direction are provided with the insulating member.

16. The battery of claim 15, wherein a maximum dimension of the extension in the first direction is less than or equal to half of a maximum dimension of the battery cell in the first direction.

17. An electrical device comprising a battery according to any one of claims 1-16 for providing electrical energy.