CN218867313U

CN218867313U - Box, battery and consumer

Info

Publication number: CN218867313U
Application number: CN202222396250.4U
Authority: CN
Inventors: 刘志明; 刘安丽
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2023-04-14
Anticipated expiration: 2032-09-07
Also published as: WO2024051407A1

Abstract

The application relates to a box, battery and consumer, wherein the box is used for holding the battery monomer, including box body and sleeve subassembly, the box body has the carry hole. The sleeve subassembly, at least part sets up in the carry hole, and the sleeve subassembly includes reciprocal anchorage's outer sleeve and inner skleeve, and the outside of inner skleeve is located to the outer muffjoint, and the material of outer sleeve is the same with the material of box body, and outer sleeve and box body welding, the wearability of the material of inner skleeve are higher than the wearability of the material of outer sleeve. According to the technical scheme, the reliability of the box body can be improved, and the service life of the box body can be prolonged.

Description

Box, battery and consumer

Technical Field

The application relates to the technical field of power batteries, in particular to a box body, a battery and electric equipment.

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry, and electric vehicles become important components of the sustainable development of the automobile industry due to the advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in its development.

The power battery is usually connected to a frame of the electric vehicle by a connector such as a bolt, and a sleeve is provided at a portion where the connector is mounted to position the connector. However, because the frame is usually made of aluminum and the sleeve is made of steel, the welding between different materials has the defects of insufficient connection strength, serious abrasion damage and the like.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, an object of the present invention is to provide a case, a battery, and an electric device, which can improve the above problems.

The application is realized by the following technical scheme:

in a first aspect, the application provides a box for accommodating a battery cell, which comprises a box body and a sleeve assembly, wherein the box body is provided with a mounting hole. The sleeve subassembly, at least part set up in it is downthehole to carry, the sleeve subassembly includes reciprocal anchorage's outer sleeve and inner skleeve, the outer muffjoint is located the outside of inner skleeve, the material of outer sleeve with the material of box body is the same, the outer sleeve with box body welding, the wearability of the material of inner skleeve is higher than the wearability of the material of outer sleeve.

According to the box of this application embodiment, through setting up nested inner skleeve and outer sleeve two-layer structure mutually respectively, the outer sleeve that links to each other with the box body is unanimous with the material of box body to when realizing sleeve locate function, improve the joint strength of sleeve subassembly and box body, in order to improve the reliability and the life of box.

According to some embodiments of the present application, the outer sleeve is made of an aluminum alloy, and the inner sleeve is made of steel.

In the scheme, the outer sleeve is made of aluminum alloy with softer texture so as to be welded and connected with the box body, the connection strength is ensured, the inner sleeve is made of steel with higher hardness so as to avoid being abraded by the connecting piece, and the service life of the box body is prolonged.

According to some embodiments of the application, the outer sleeve is an interference fit with the inner sleeve.

In the above scheme, the outer sleeve and the inner sleeve are in interference fit, so that the connection strength of the outer sleeve and the inner sleeve is improved, the inner sleeve is prevented from being driven by the connecting piece, and the abrasion is reduced.

According to some embodiments of the application, the inner sleeve is provided with anti-slip threads on its outer circumferential surface.

In the above scheme, through set up anti-skidding line on interior sleeve, further improve the joint strength of inner skleeve and outer sleeve, avoid the inner skleeve to be driven, reduce wear by the connecting piece.

According to some embodiments of the present application, the sleeve assembly further comprises a stop configured to limit circumferential rotation of the inner sleeve relative to the outer sleeve.

In the above scheme, through setting up the locating part, further strengthen the joint strength of inner skleeve and outer sleeve, avoid the inner skleeve to be driven by the connecting piece and follow with commentaries on classics, reduce wear.

According to some embodiments of the present application, the outer sleeve is provided with a first positioning hole, the inner sleeve is provided with a second positioning hole, and the limiting member is a positioning pin inserted into the first positioning hole and the second positioning hole.

In the scheme, the positioning limiting parts are respectively arranged on the outer sleeve and the inner sleeve, so that the inner sleeve and the outer sleeve are difficult to rotate, and the inner sleeve and the outer sleeve are prevented from rotating relatively to be abraded.

According to some embodiments of the present application, the inner circumferential surface of the outer sleeve is formed with a first step surface, the inner sleeve includes a sleeve portion and a flange portion, the flange portion is located at one end of the sleeve portion, the flange portion protrudes from the outer circumferential surface of the sleeve portion in a radial direction of the sleeve portion, and the flange portion abuts against the first step surface.

In the above scheme, the outer sleeve is provided with the first step surface, and the inner sleeve is provided with the corresponding flange part, so that the axial relative displacement between the outer sleeve and the inner sleeve is avoided, and the service life of the sleeve assembly is further prolonged.

According to some embodiments of the present application, the outer sleeve includes a first section and a second section coaxially arranged, and an inner diameter of the first section is smaller than an inner diameter of the second section, so that the first step surface is formed on an inner peripheral surface of the outer sleeve. The outer diameter of the first section is smaller than that of the second section, so that a second step surface is formed on the outer peripheral surface of the outer sleeve. The sleeve portion is located within the first segment.

In the scheme, the narrower first section is arranged on the outer sleeve, so that the sleeve part of the inner sleeve is tightly attached to the first section, and the flange part is tightly abutted against the first step surface, the material consumption is reduced, and the weight of the sleeve assembly is reduced.

A battery according to an embodiment of the second aspect of the present application includes a battery cell, and the case according to the first aspect.

According to the third aspect of the present application, the electric equipment comprises an electric equipment body, and the battery according to the second aspect, wherein the battery is hung on the electric equipment body through a connecting piece penetrating through the inner sleeve, and the battery is used for providing electric energy.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a schematic illustration of a vehicle according to one embodiment of the present application;

FIG. 2 is a schematic diagram of a battery according to one embodiment of the present application;

FIG. 3 is a schematic structural diagram of a box body according to an embodiment of the present application;

FIG. 4 is an enlarged view of portion A of the case body shown in FIG. 3;

FIG. 5 is an exploded view of a sleeve assembly according to one embodiment of the present application;

FIG. 6 is a side cross-sectional view of a sleeve assembly according to one embodiment of the present application.

Icon: 1000-a vehicle; 100-a battery; 10-a box body; 11-a first sub-tank; 12-a second sub-tank; 13-a box body; 131-mounting holes; 14-a sleeve assembly; 15-an outer sleeve; 151-first positioning hole; 152-a first step surface; 153-first section; 154-second segment; 155-a second step face; 16-an inner sleeve; 161-a second positioning hole; 162-a sleeve portion; 163-flange portion; 17-a limit stop; 18-a connector; 20-a battery cell; 200-a motor; 300-controller.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

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

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

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "attached" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

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

The "plurality" in the present application means two or more (including two), and similarly, "plural" means two or more (including two) and "plural" means two or more (including two).

In this application, reference to a battery refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc.

The battery monomer comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive pole piece, a negative pole piece and an isolating membrane. The battery cell mainly depends on metal ions to move between the positive pole piece and the negative pole piece to work. The positive pole piece comprises a positive pole current collector and a positive pole active substance layer, wherein the positive pole active substance layer is coated on the surface of the positive pole current collector, and the current collector which is not coated with the positive pole active substance layer is used as a positive pole 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 pole piece includes negative current collector and negative active material layer, and the negative active material layer coats in the surface of negative current collector, and the mass flow body that does not coat the negative active material layer is as negative pole utmost point ear. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the fuse is not fused when a large current is passed, the number of the positive electrode tabs is multiple and the positive electrode tabs are stacked together, and the number of the negative electrode tabs is multiple and the negative electrode tabs are stacked together. The material of the isolation film may be PP (polypropylene) or PE (polyethylene).

The development of battery technology needs to consider various design factors, such as energy density, discharge capacity, charge and discharge rate, and other performance parameters, and also needs to consider the assembly efficiency of the battery.

The battery cell disclosed in the embodiment of the application can be used in electric equipment such as vehicles, ships or aircrafts, but not limited thereto. The power supply system including the battery cell, the battery, and the like disclosed in the present application may be used.

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

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

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present disclosure. The vehicle 1000 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or a range-extended automobile, etc. The battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operation power supply of the vehicle 1000 for a circuit system of the vehicle 1000, for example, for power demand for operation in starting, navigation, and running of the vehicle 1000.

The vehicle 1000 may further include a controller 300 and a motor 200, the controller 300 being configured to control the battery 100 to supply power to the motor 200, for example, for power requirements for operation during starting, navigation, and traveling of the vehicle 1000.

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

Referring to fig. 2, fig. 2 is an exploded view of a battery according to some embodiments of the present disclosure. The battery 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The case 10 is used to provide a receiving space for the battery cell 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first sub-case 11 and a second sub-case 12, the first sub-case 11 and the second sub-case 12 cover each other, and the first sub-case 11 and the second sub-case 12 together define a receiving space for receiving the battery cell 20. The second sub-box 12 may be a hollow structure with an opening at one end, the first sub-box 11 may be a plate-shaped structure, and the first sub-box 11 covers the opening side of the second sub-box 12, so that the first sub-box 11 and the second sub-box 12 jointly define an accommodating space; the first sub-box 11 and the second sub-box 12 may be both hollow structures with one side open, and the open side of the first sub-box 11 is covered on the open side of the second sub-box 12.

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

The battery cell 20 may be a secondary battery or a primary battery; the battery cell 20 may also be a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery, but is not limited thereto.

In the prior art, the box 10 is usually fixed on the vehicle 1000 by a connector 18, and the connector 18 may adopt a screw, a bolt, a hook, and the like to realize connection between the box body 13 and the electric device, and the bolt is taken as an example in this application. The box 10 is provided with a sleeve at the position where the bolt penetrates out, and the sleeve is used for positioning and guiding the bolt when the bolt penetrates out of the box 10. The sleeve is typically secured to the housing 10 by welding or the like. However, most of the current cases, the box 10 is usually made of aluminum to reduce the weight, and the bolts are usually made of steel to ensure the connection strength. If the sleeve is made of the same aluminum material as the box body 10, the sleeve is easy to wear in the process of screw dismounting of the bolt; when the sleeve is made of steel which is the same as the bolt, the defects that the welding strength between the steel sleeve and the aluminum box body 10 and the welding strength of dissimilar materials are insufficient exist, and the problems that the aluminum box body 10 is seriously abraded and the service life is influenced in the locking process of the steel bolt with higher hardness exist.

However, as the practical service time of the electric vehicle 1000 is longer and longer, the probability of disassembling and repairing the battery 100 is increased year by year, and the repairing frequency is gradually increased, so that the bolts are in more and more frictional contact with the sleeves in the frequent disassembling and assembling processes, which makes the wear of the sleeves more serious, and therefore, the improvement of the sleeves to adapt to high-frequency friction is more urgent.

Referring to fig. 3 to 6, fig. 3 is a schematic structural view of a box body according to an embodiment of the present application, fig. 4 is an enlarged view of a portion a of the box body shown in fig. 3, fig. 5 is an exploded view of a sleeve assembly according to an embodiment of the present application, and fig. 6 is a side sectional view of the sleeve assembly according to an embodiment of the present application. The box 10 for accommodating the battery cell 20 of an embodiment of the present application includes a box body 13 and a sleeve assembly 14, wherein the box body 13 has a mounting hole 131. The sleeve assembly 14 is at least partially arranged in the mounting hole 131, the sleeve assembly 14 comprises an outer sleeve 15 and an inner sleeve 16 which are fixed with each other, the outer sleeve 15 is sleeved outside the inner sleeve 16, the material of the outer sleeve 15 is the same as that of the box body 13, the outer sleeve 15 is welded with the box body 13, and the wear resistance of the material of the inner sleeve 16 is higher than that of the material of the outer sleeve 15.

In this embodiment, the case body 13 may be the first sub-case 11 or the second sub-case 12 in the prior art. The connecting member 18 penetrates through the mounting hole 131 to connect the box body 13 to the electric device, so as to fix the box body 10. The outer sleeve 15 and the inner sleeve 16 are both in the shape of a cylinder with a hollow center, the hollow portion is also in the shape of a cylinder, and the inner sleeve 16 is firmly connected with the outer sleeve 15 in a manner of being partially nested between the outer sleeve 15, so that relative displacement or rotation is avoided, and abrasion caused by mutual friction is reduced.

In this embodiment, since the outer sleeve 15 is made of the same material as the case body 13, the outer sleeve 15 can be firmly welded to the mounting hole 131 of the case body 13. The inner sleeve 16 may be made of a more wear-resistant material different from that of the outer sleeve 15 to meet the requirement of assembling and disassembling the connecting member 18, so as to avoid the wear caused by the rotation friction of the connecting member 18.

According to the box 10 provided by the embodiment of the application, the nested two-layer structure of the inner sleeve 16 and the nested outer sleeve 15 is respectively arranged, and the outer sleeve 15 connected with the box body 13 is made of the same material as the box body 13, so that the sleeve positioning function is realized, and meanwhile, the connection strength of the sleeve assembly 14 and the box body 13 is improved, and the reliability and the service life of the box 10 are improved.

Alternatively, the outer sleeve 15 is made of aluminum alloy and the inner sleeve 16 is made of steel.

In this embodiment, the box body 13 is made of aluminum alloy, so that the outer sleeve 15 is made of the same material as the box body 13, thereby improving the welding strength between the outer sleeve 15 and the box body 13. The aluminum alloy has high strength, good corrosion resistance, and low density, and the case 10 has a large volume, so that the total weight of the battery 100 can be effectively reduced by using the aluminum alloy on the premise of satisfying the strength, thereby reducing energy loss when the battery 100 outputs and propels the vehicle 1000.

The material of inner sleeve 16 chooses for use to be the steel, and the steel has good hardness to satisfy the friction demand when connecting piece 18 frequently dismouting, effectively slow down connecting piece 18 and to telescopic wearing and tearing, avoid because of sleeve/box body 13 goes up the contact site of connecting piece 18 and rubs because of the material difference and lead to the damage, and then the condition that influences the joint strength of connecting piece 18 has improved the life of box 10.

In the above embodiment, the outer sleeve 15 is made of a softer aluminum alloy to facilitate welding with the box body 13 to ensure the connection strength, and the inner sleeve 16 is made of a harder steel to avoid being worn by the connecting member 18, thereby prolonging the service life of the box body 10.

Optionally, the outer sleeve 15 and the inner sleeve 16 are in an interference fit, and specifically, the interference fit is used at the position where the outer sleeve 15 and the inner sleeve 16 are engaged.

The interference fit utilizes the elasticity of the outer sleeve 15 to expand and deform the hole to be sleeved on the inner sleeve 16, and the outer sleeve 15 can hoop the inner sleeve 16 when elastically recovering to enable the outer sleeve and the inner sleeve to be tightly connected. The sleeve component 14 adopts interference fit, and has the characteristics of simple structure, small damage to each component and high connection strength.

In the embodiment, the outer sleeve 15 and the inner sleeve 16 are in interference fit, so that the connection strength of the outer sleeve 15 and the inner sleeve 16 is improved, the inner sleeve 16 is prevented from being driven by the connecting piece 18, and the abrasion is reduced.

Optionally, the inner sleeve 16 is provided with anti-slip threads (not shown) on its outer circumferential surface.

The anti-slip pattern can be obtained by knurling process, so that a fine concave-convex structure exists on the surface, and the friction coefficient is improved. The anti-skid lines with the diamond knurls are arranged in the embodiment, and specific processing modes or shapes of the anti-skid lines are not specifically limited, so that the purposes of skid resistance and friction force improvement are achieved.

In the embodiment, the anti-slip threads are arranged on the inner sleeve 16, so that the connection strength between the inner sleeve 16 and the outer sleeve 15 is further improved, the inner sleeve 16 is prevented from being driven by the connecting piece 18, and the abrasion is reduced.

With continued reference to fig. 5, fig. 5 is an exploded view of the sleeve assembly according to an embodiment of the present application, and optionally, the sleeve assembly 14 further includes a limiting member 17, and the limiting member 17 is configured to limit the inner sleeve 16 to rotate circumferentially relative to the outer sleeve 15.

On the basis that the inner sleeve 16 is directly connected with the outer sleeve 15, a limiting member 17 is arranged to further reinforce the connection strength of the inner sleeve 16 and the outer sleeve 15, so as to prevent the inner sleeve 16 and the outer sleeve 15 from rotating relatively. Locating part 17 can be established to bolt, buckle, trip, spring etc. and this embodiment adopts for the bolt, nevertheless this application does not make the restriction to locating part 17's structure to can satisfy spacing and the purpose of location can.

In the embodiment, the limiting member 17 is provided to further enhance the connection strength between the inner sleeve 16 and the outer sleeve 15, so as to prevent the inner sleeve 16 from being driven by the connecting member 18 to rotate and reduce the wear.

Optionally, the outer sleeve 15 is provided with a first positioning hole 151, the inner sleeve 16 is provided with a second positioning hole 161, and the limiting member 17 is a positioning pin inserted into the first positioning hole 151 and the second positioning hole 161.

Locating part 17 adopts the locating pin in this application, sets up the locating hole on inner skleeve 16 and the outer sleeve 15 respectively, and the locating pin wears out first locating hole 151 and second locating hole 161 in proper order, avoids inner skleeve 16 and outer sleeve 15 to take place around axial relative rotation to further realize fixing of inner skleeve 16 and outer sleeve 15. Further, the positioning pins are spring pins to be easily fitted into the first positioning holes 151 and the second positioning holes 161.

In the embodiment, the positioning limiting members 17 are respectively formed on the outer sleeve 15 and the inner sleeve 16, so that the inner sleeve 16 and the outer sleeve 15 are difficult to rotate, and the inner sleeve 16 and the outer sleeve 15 are prevented from being worn due to relative rotation.

Alternatively, the inner peripheral surface of the outer sleeve 15 is formed with a first step surface 152, the inner sleeve 16 includes a sleeve portion 162 and a flange portion 163, the flange portion 163 is located at one end of the sleeve portion 162, the flange portion 163 protrudes from the outer peripheral surface of the sleeve portion 162 in the radial direction of the sleeve portion 162, and the flange portion 163 abuts against the first step surface 152.

The sleeve portion 162 is a cylinder with a hollow center, and the hollow portion is also a cylinder shape, and the second positioning hole 161 is opened in the sleeve portion 162. The flange 163 is a structure in which the inner sleeve 16 projects in the radial direction of the outer sleeve 15, and has a ring shape like a flange piece. In this embodiment, the flange portion 163 is located at one end of the sleeve portion 162, such that one side of the flange portion 163 abuts against the first step surface 152, and the other side faces the direction in which the connecting member 18 is installed, so as to abut against the connecting member 18, and the connecting member 18 is inserted into the mounting hole 131 and screwed to tightly abut against the flange portion 163. The first step surface 152 is located inside the outer sleeve 15 and has an annular shape, and a gap in the middle of the annular shape is used for the sleeve portion 162 to be inserted. The sleeve portion 162 passes through the gap between the first step surfaces 152 and abuts against the outer sleeve 15, and forms an interference fit.

In the present embodiment, the first step surface 152 is provided on the outer sleeve 15, and the corresponding flange 163 is provided on the inner sleeve 16, so that the relative axial displacement between the outer sleeve 15 and the inner sleeve 16 is avoided, and the service life of the sleeve assembly 14 is further prolonged.

Optionally, the outer sleeve 15 includes a first section 153 and a second section 154 coaxially disposed, and an inner diameter of the first section 153 is smaller than an inner diameter of the second section 154, so that a first step surface 152 is formed on an inner peripheral surface of the outer sleeve 15. The first section 153 has an outer diameter smaller than that of the second section 154 so that a second step surface 155 is formed on the outer circumferential surface of the outer sleeve 15. The sleeve portion 162 is located within the first section 153.

The first section 153 is in turn engaged with the second section 154, the second section 154 is connected to the body of the case 10, and the first section 153 is inwardly contracted with respect to the second section 154 and connected to the sleeve portion 162 of the inner sleeve 16, thus reducing material consumption and reducing the overall weight of the sleeve assembly 14. The first section 153 is interference fit with the sleeve portion 162 to ensure the connection strength of the inner sleeve 16 and the outer sleeve 15. The first positioning hole 151 is opened in the first segment 153 and is disposed opposite to the second positioning hole 161 of the sleeve portion 162, so that the position-limiting members 17 sequentially pass through, thereby positioning the inner sleeve 16 and the outer sleeve 15. The second step surface 155 is provided on the outer circumferential surface of the outer sleeve 15, and is located at the boundary between the first section 153 and the second section 154, and the second step surface 155 is a flat surface, so as to avoid interference with the installation path of the stopper 17, thereby improving convenience.

In the present embodiment, the first section 153 that is narrowed is disposed on the outer sleeve 15, so that the flange 163 and the first step surface 152 tightly abut against each other while the sleeve portion 162 of the inner sleeve 16 is tightly fitted in the first section 153, and the material consumption and the weight of the sleeve assembly 14 are reduced.

An embodiment of the present application further provides a battery 100, which includes a battery cell 20, and a case 10 as in the foregoing embodiments. For the description of the battery cell 20 and the case 10, reference may be made to the foregoing embodiments, and for brevity, the description is omitted here.

An embodiment of the present application further provides an electric device, which includes an electric device body, and a battery 100 as in the foregoing embodiments, wherein the battery 100 is mounted on the electric device body through a connecting member 18 penetrating through the inner sleeve 16, and the battery 100 is used for providing electric energy. Alternatively, the power consumption device body may be a vehicle 1000, a ship, or a spacecraft.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. A case (10) for housing a battery cell (20), comprising:

a box body (13) having a mounting hole (131);

sleeve component (14), at least part set up in carry hole (131), sleeve component (14) are including reciprocal anchorage's outer sleeve (15) and inner skleeve (16), outer sleeve (15) cover is located the outside of inner skleeve (16), the material of outer sleeve (15) with the material of box body (13) is the same, outer sleeve (15) with box body (13) welding, the wearability of the material of inner skleeve (16) is higher than the wearability of the material of outer sleeve (15).

2. A tank (10) as claimed in claim 1, characterised in that said outer sleeve (15) is of aluminium alloy and said inner sleeve (16) is of steel.

3. A container (10) according to claim 1, wherein said outer sleeve (15) is an interference fit with said inner sleeve (16).

4. A cabinet (10) as claimed in claim 1, wherein the inner sleeve (16) is provided with anti-slip threads on its outer circumference.

5. A housing (10) according to claim 1, wherein said sleeve assembly (14) further comprises a stop (17), said stop (17) being configured to limit circumferential rotation of said inner sleeve (16) relative to said outer sleeve (15).

6. A cabinet (10) as claimed in claim 5, wherein the outer sleeve (15) is provided with a first positioning hole (151), the inner sleeve (16) is provided with a second positioning hole (161), and the stopper (17) is a positioning pin inserted into the first positioning hole (151) and the second positioning hole (161).

7. The tank (10) according to claim 1, wherein a first step surface (152) is formed on an inner peripheral surface of the outer sleeve (15), the inner sleeve (16) includes a sleeve portion (162) and a flange portion (163), the flange portion (163) is located at one end of the sleeve portion (162), the flange portion (163) protrudes from an outer peripheral surface of the sleeve portion (162) in a radial direction of the sleeve portion (162), and the flange portion (163) abuts against the first step surface (152).

8. A tank (10) as claimed in claim 7, wherein said outer sleeve (15) comprises a first section (153) and a second section (154) which are coaxially arranged, the inner diameter of said first section (153) being smaller than the inner diameter of said second section (154) so that said first step surface (152) is formed on the inner peripheral surface of said outer sleeve (15); the outer diameter of the first section (153) is smaller than that of the second section (154), so that a second step surface (155) is formed on the outer peripheral surface of the outer sleeve (15); the sleeve portion (162) is located within the first section (153).

9. A battery (100), characterized in that it comprises a battery cell (20), and a case (10) according to any one of claims 1 to 8.

10. An electric device, characterized in that it comprises an electric device body, and a battery (100) according to claim 9, said battery (100) being mounted to said electric device body by means of a connection (18) passing through said inner sleeve (16), said battery (100) being intended to provide electric energy.