WO2024051407A1

WO2024051407A1 - Housing, battery, and electrical device

Info

Publication number: WO2024051407A1
Application number: PCT/CN2023/110825
Authority: WO
Inventors: 刘志明; 刘安丽
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2022-09-07
Filing date: 2023-08-02
Publication date: 2024-03-14
Also published as: CN218867313U

Abstract

A housing (10), a battery (100), and an electrical device. The housing (10) is used for accommodating a battery cell (20), the housing (10) comprises a housing body (13) and a sleeve assembly (14), the housing body (13) is provided with mounting holes (131), the sleeve assembly (14) is at least partially provided in the mounting holes (131), the sleeve assembly (14) comprises an outer sleeve (15) and an inner sleeve (16) fixed to each other, the outer sleeve (15) is fitted over the inner sleeve (16), the material of the outer sleeve (15) is the same as that of the housing body (13), the outer sleeve (15) is welded to the housing body (13), and abrasion resistance of the material of the inner sleeve (16) is higher than that of the material of the outer sleeve (15). The reliability and the service life of the housing body (10) can be improved.

Description

Box, battery and electrical equipment

Cross-references to related applications

This application claims priority to Chinese patent application CN202222396250.4 titled "Box, Battery and Electrical Equipment" submitted on September 7, 2022. The entire content of this application is incorporated herein by reference.

Technical field

This application relates to the technical field of power batteries, specifically, to a box, battery and electrical equipment.

Background technique

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

The power battery is usually connected to the frame of the electric vehicle through connectors such as bolts, and a sleeve is provided at the location where the connector is installed to position the connector. However, since the frame is usually made of aluminum and the sleeve is made of steel, the welding between different materials has defects such as insufficient connection strength and serious wear and damage.

Contents of the invention

This application provides a box, battery and electrical equipment, which can improve the reliability and service life of the box.

This application is realized through the following technical solutions:

In a first aspect, this application provides a box for accommodating battery cells, including a box The body and sleeve are assembled, and the box body has a mounting hole. The sleeve assembly is at least partially disposed in the mounting hole. The sleeve assembly includes an outer sleeve and an inner sleeve that are fixed to each other. The outer sleeve is sleeved on the outside of the inner sleeve, The material of the outer sleeve is the same as the material of the box body, the outer sleeve is welded to the box body, and the wear resistance of the material of the inner sleeve is higher than that of the outer sleeve. wear resistance.

According to the box body of the embodiment of the present application, a two-layer structure of an inner sleeve and an outer sleeve that are nested respectively is provided. The outer sleeve connected to the box body is made of the same material as the box body, thereby realizing the sleeve positioning function. At the same time, the connection strength between the sleeve assembly and the box body is improved to improve the reliability and service life of the box.

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

In the above scheme, the outer sleeve is made of softer aluminum alloy to facilitate welding connection with the box body to ensure the connection strength, while the inner sleeve is made of harder steel to reduce the risk of wear of the connected parts and improve the The service life of the box.

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

In the above solution, the outer sleeve and the inner sleeve are interference-fitted to improve the connection strength between the outer sleeve and the inner sleeve, reduce the risk of the inner sleeve being driven by the connecting piece, and reduce wear.

According to some embodiments of the present application, anti-skid patterns are provided on the outer peripheral surface of the inner sleeve.

In the above solution, anti-slip patterns are provided on the inner sleeve to further improve the connection strength between the inner sleeve and the outer sleeve, reduce the risk of the inner sleeve being driven by the connecting piece, and reduce wear.

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

In the above solution, the connection strength between the inner sleeve and the outer sleeve is further strengthened by setting the limiter, thereby reducing the risk of the inner sleeve being driven by the connecting piece and rotating, and reducing wear.

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

In the above solution, positioning holes are respectively opened on the outer sleeve and the inner sleeve to position the stoppers, making it difficult for the inner sleeve and the outer sleeve to rotate and reducing the risk of wear caused by the relative rotation of the inner sleeve and the outer sleeve. risk.

According to some embodiments of the present application, a first step surface is formed on the inner circumferential surface of the outer sleeve, and the inner sleeve includes a sleeve part and a flange part, and the flange part is located on the sleeve part. At one end, the flange portion protrudes from the outer peripheral surface of the sleeve portion along the radial direction of the sleeve portion, and the flange portion resists the first step surface.

In the above solution, by providing a first step surface on the outer sleeve and a corresponding flange part on the inner sleeve, the probability of relative axial displacement between the outer sleeve and the inner sleeve is reduced, and the use of the sleeve assembly is further improved. life.

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

In the above solution, by arranging a narrower first section on the outer sleeve, the sleeve part of the inner sleeve is closely fitted in the first section, while the flange part is closely against the first step surface, and the material is reduced at the same time. consumption, reducing the weight of the sleeve assembly.

A battery according to the second embodiment of the present application includes a battery cell and a box as described in the first aspect.

An electrical equipment according to the third embodiment of the present application includes an electrical equipment body, and a battery as described in the second aspect, the battery being mounted on the inner sleeve through a connecting piece. The electrical equipment body is described, and the battery is used to provide electrical energy.

Additional aspects and advantages of the present application will be given in part in the description below and in part from the following become apparent from the description above, or may be learned by practice of this application.

Description of the drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of a vehicle according to an embodiment of the present application;

Figure 2 is a schematic structural diagram of a battery according to an embodiment of the present application;

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

Figure 4 is an enlarged view of part A of the box body shown in Figure 3;

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

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

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

Marking description: 1000-vehicle; 100-battery; 10-box; 11-first sub-box; 12-second sub-box; 13-box body; 131-mounting hole; 14-sleeve assembly; 15-outer sleeve; 151-first positioning hole; 152-first step surface; 153-first section; 154-second section; 155-second step surface; 16-inner sleeve; 161-second positioning Hole; 162-sleeve part; 163-flange part; 17-limiting piece; 18-connecting piece; 20-battery unit; 200-motor; 300-controller.

Detailed ways

In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not the entire implementation. example. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the technical field of this application; the terms used in the specification of this application are only for describing specific implementations. The purpose of the examples is not intended to limit the application; the terms "including" and "having" and any variations thereof in the description and claims of the application and the above description of the drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or priority relationship.

Reference in this application 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 application. The appearances of this 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 will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

In the description of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection" and "attachment" should be understood in a broad sense. For example, it can be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediate medium; it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

The term "and/or" in this application is just an association relationship describing related objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, alone There are three situations B. In addition, the character "/" in this application generally indicates that the related objects are an "or" relationship.

"Multiple" appearing in this application refers to more than two (including two). Similarly, "Multiple sets" refers to two or more groups (including two groups), and "multiple tablets" refers to two or more tablets (including two tablets).

In this application, the battery mentioned refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack.

The battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode plate, a negative electrode plate and a separator. Battery cells mainly rely on the movement of metal ions between the positive and negative electrodes to work. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector without the positive electrode active material layer is used as a positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector without the negative electrode active material layer is used as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon. In order to ensure that large currents can pass through without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the isolation film can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene), etc.

The development of battery technology must consider multiple design factors at the same time, such as energy density, discharge capacity, charge and discharge rate and other performance parameters. In addition, the assembly efficiency of the battery also needs to be considered.

The battery cells disclosed in the embodiments of the present application can be used in, but are not limited to, vehicles, ships, aircraft, and other electrical equipment. The power supply system of the electrical equipment can be composed of battery cells, batteries, etc. disclosed in this application.

Embodiments of the present application provide an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, a mobile phone, a tablet computer, a laptop, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, Spacecraft and more. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric Ship toys and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.

For the convenience of explanation in the following embodiments, an electrical device according to an embodiment of the present application is a vehicle 1000 as an example.

Please refer to Figure 1 , which is a schematic structural diagram of a vehicle provided by some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas 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, etc. The battery 100 is disposed inside the vehicle 1000 , and the battery 100 may be disposed at the bottom, head, or tail of the vehicle 1000 . The battery 100 can be used to power the vehicle 1000 . For example, the battery 100 can be used as an operating power source for the vehicle 1000 and for the circuit system of the vehicle 1000 , such as for the starting, navigation and operating power requirements of the vehicle 1000 .

The vehicle 1000 may also include a controller 300 and a motor 200 . The controller 300 is used to control the battery 100 to provide power to the motor 200 , for example, to meet the power requirements for starting, navigation, and driving of the vehicle 1000 .

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

Please refer to Figure 2, which is an exploded view of a battery provided by some embodiments of the present application. The battery 100 includes a case 10 and battery cells 20 , and the battery cells 20 are accommodated in the case 10 . Among them, the box 10 is used to provide an accommodation space for the battery cells 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first sub-box 11 and a second sub-box 12. The first sub-box 11 and the second sub-box 12 cover each other. The first sub-box 11 and the second sub-box 12 are The two sub-boxes 12 jointly define an accommodation space for accommodating the battery cells 20 . The second sub-box 12 can be a hollow structure with one end open, and the first sub-box 11 can be a plate-like structure. The first sub-box 11 is covered with the open side of the second sub-box 12 so that the first sub-box 11 can have a plate-like structure. The box 11 and the second sub-box 12 jointly define an accommodation space. The first sub-box 11 and the second sub-box 12 can also be hollow structures with one side open, and the open side of the first sub-box 11 is covered with the open side of the second sub-box 12.

In the battery 100, there may be a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the plurality of battery cells 20 are connected in series and in parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or mixed together, and then the whole composed of the plurality of battery cells 20 can be accommodated in the box 10 ; of course, the battery 100 can also be a plurality of battery cells 20 First, the battery modules are connected in series, parallel, or mixed to form a battery module, and then multiple battery modules are connected in series, parallel, or mixed to form a whole, and are accommodated in the box 10 . The battery 100 may also include other structures. For example, the battery 100 may further include a bus component for realizing electrical connections between multiple 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 body 10 is usually fixed on the vehicle 1000 through a connector 18. The connector 18 can use screws, bolts, hooks and other components to realize the connection between the box body 13 and the electrical equipment. In this application, bolts are used. as an example. The box body 10 is provided with a sleeve at the location where the bolt passes through, and the sleeve is used to position and guide the bolt when the bolt passes through the box body 10 . The sleeve is usually fixed on the box 10 by welding or other methods. However, in most current cases, the box body 10 is usually made of aluminum to reduce weight, and the bolts are usually made of steel to ensure connection strength. If the sleeve is made of the same aluminum material as the box body 10, it will be easily worn during the spiral disassembly and assembly of the bolt; and when the sleeve is made of the same steel as the bolt, there will be a gap between the steel sleeve and the aluminum box body 10 Among them, there are defects such as insufficient welding strength of dissimilar materials, and problems such as severe wear and tear on the aluminum box 10 during the locking process of steel bolts with higher hardness, which affects the service life.

As the actual use time of the electric vehicle 1000 is getting longer and longer, the probability of disassembly and maintenance of the battery 100 is increasing year by year, and the frequency of maintenance is gradually increasing. Therefore, the bolts will increasingly come into contact with the sleeve during the frequent disassembly and assembly process. More frictional contact, which makes the sleeve more worn Serious, so it is increasingly urgent to improve the sleeve to adapt to high-frequency friction.

Please refer to Figures 3 to 6. Figure 3 is a schematic structural diagram of the box body according to an embodiment of the present application. Figure 4 is an enlarged view of part A of the box body shown in Figure 3. Figure 5 is an embodiment of the present application. An exploded view of the sleeve assembly. Figure 6 is a side cross-sectional view of the sleeve assembly according to one embodiment of the present application. A box 10 according to an embodiment of the present application is used to accommodate battery cells 20 and includes a box body 13 and a sleeve assembly 14. The box body 13 has a mounting hole 131. The sleeve assembly 14 is at least partially disposed in the mounting hole 131. The sleeve assembly 14 includes an outer sleeve 15 and an inner sleeve 16 that are fixed to each other. The outer sleeve 15 is sleeved on the outside of the inner sleeve 16. The outer sleeve The material of 15 is the same as that of the box body 13. The outer sleeve 15 is welded to the box body 13. The wear resistance of the material of the inner sleeve 16 is higher than that of the outer sleeve 15.

In this embodiment, the box body 13 may be the first sub-box 11 or the second sub-box 12 in the aforementioned prior art. The connector 18 passes through the mounting hole 131 to connect the box body 13 to the electrical equipment to achieve the fixation of the box 10 . The shapes of the outer sleeve 15 and the inner sleeve 16 are both cylinders with a hollow middle, and the shape of the hollow part is also a cylinder shape. The inner sleeve 16 is partially nested between the outer sleeves 15 and is connected to the outer sleeve 15 . The tubes 15 are firmly connected to reduce the probability of relative displacement or rotation, thereby reducing wear caused by mutual friction.

In this embodiment, since the outer sleeve 15 and the box body 13 are made of the same material, the outer sleeve 15 can be firmly welded to the mounting hole 131 on the box body 13 . The inner sleeve 16 can be made of a different and more wear-resistant material than the outer sleeve 15 to adapt to the disassembly and assembly requirements of the connector 18 and reduce the risk of wear due to rotational friction of the connector 18 .

The box 10 in the embodiment of the present application has a two-layer structure of an inner sleeve 16 and an outer sleeve 15 that are nested respectively. The outer sleeve 15 connected to the box body 13 is made of the same material as the box body 13, so that While realizing the sleeve positioning function, the connection strength between the sleeve assembly 14 and the box body 13 is improved, so as to improve the reliability and service life of the box 10 .

Optionally, 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 the outer sleeve 15 is made of the same material as the box body 13 to improve the welding strength of the outer sleeve 15 and the box body 13 . Aluminum alloy has high strength, good corrosion resistance and low density. Since the box 10 is large in volume, the use of aluminum alloy can effectively reduce the total weight of the battery 100 while maintaining sufficient strength, thereby reducing the number of batteries. The energy loss when the output is 100 and the vehicle is propelled 1000 times.

The inner sleeve 16 is made of steel, which has good hardness to meet the friction requirements of the connector 18 during frequent disassembly and assembly, effectively slow down the wear of the sleeve by the connector 18, and reduce the risk of damage to the sleeve/box body 13. The contact parts of the connector 18 may be damaged due to friction due to different materials, thereby affecting the connection strength of the connector 18 and improving the service life of the box 10 .

In the above embodiment, the outer sleeve 15 is made of soft aluminum alloy to facilitate welding connection with the box body 13 to ensure the connection strength, while the inner sleeve 16 is made of steel with higher hardness to reduce the risk of wear of the connected parts 18 , improving the service life of the box 10.

Optionally, the outer sleeve 15 and the inner sleeve 16 have an interference fit, specifically the parts where the outer sleeve 15 and the inner sleeve 16 fit together are an interference fit.

The interference fit utilizes the elasticity of the outer sleeve 15 to enlarge and deform the hole to fit on the inner sleeve 16. When the outer sleeve 15 elastically recovers, it can tighten the inner sleeve 16 to tightly connect the two. The sleeve assembly 14 adopts an interference fit and has the characteristics of simple structure, small damage to each component, and high connection strength.

In this embodiment, the interference fit between the outer sleeve 15 and the inner sleeve 16 increases the connection strength between the outer sleeve 15 and the inner sleeve 16, reduces the risk of the inner sleeve 16 being driven by the connector 18, and reduces wear.

Optionally, an anti-slip pattern (not shown) is provided on the outer peripheral surface of the inner sleeve 16 .

The anti-skid pattern can be obtained through the knurling process, which creates a fine uneven structure on the surface to increase the friction coefficient. This embodiment is provided with diamond-shaped knurling anti-skid patterns. There is no specific restriction on the specific processing method or shape of the anti-skid patterns, so as to achieve the purpose of preventing slipping and improving friction.

In this embodiment, anti-slip patterns are provided on the inner sleeve 16 to further improve the contact between the inner sleeve 16 and the inner sleeve 16 . The connection strength of the outer sleeve 15 reduces the risk of the inner sleeve 16 being driven by the connecting piece 18 and reduces wear.

Please continue to refer to Figure 5. Figure 5 is an exploded view of the sleeve assembly according to an embodiment of the present application. Optionally, the sleeve assembly 14 also includes a limiting member 17. The limiting member 17 is configured to limit the relative movement of the inner sleeve 16. The outer sleeve 15 rotates circumferentially.

On the basis of the direct connection between the inner sleeve 16 and the outer sleeve 15, a limiter 17 is provided to further strengthen the connection strength between the inner sleeve 16 and the outer sleeve 15 and reduce the relative occurrence between the inner sleeve 16 and the outer sleeve 15. Probability of rotation. The limiting member 17 can be configured as a bolt, a latch, a buckle, a hook, a spring, etc. In this embodiment, a bolt is used, but this application does not limit the structure of the limiting member 17 so as to meet the purpose of limiting and positioning. That’s it.

This embodiment further strengthens the connection strength between the inner sleeve 16 and the outer sleeve 15 by arranging the limiting piece 17, thereby reducing the risk of the inner sleeve 16 being driven by the connecting piece 18 to rotate, and reducing 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 inserted into the first positioning hole 151 and the second positioning hole 161 . Locating pin.

In this application, the limiting member 17 adopts positioning pins. Positioning holes are respectively provided on the inner sleeve 16 and the outer sleeve 15. The positioning pins pass through the first positioning hole 151 and the second positioning hole 161 in sequence, lowering the inner sleeve 16 and the outer sleeve. The probability of relative rotation of the sleeve 15 around the axial direction to further achieve the fixation of the inner sleeve 16 and the outer sleeve 15 . Further, the positioning pin uses a spring pin to facilitate installation into the first positioning hole 151 and the second positioning hole 161 .

In this embodiment, positioning holes are respectively opened on the outer sleeve 15 and the inner sleeve 16 to position the limiting member 17, so that it is difficult for the inner sleeve 16 and the outer sleeve 15 to rotate, and the inner sleeve 16 and the outer sleeve 16 are lowered. 15 Risk of wear due to relative rotation.

Optionally, a first step surface 152 is formed on the inner circumferential surface of the outer sleeve 15. The inner sleeve 16 includes a sleeve part 162 and a flange part 163. The flange part 163 is located at one end of the sleeve part 162. The part 163 protrudes from the outer peripheral surface of the sleeve part 162 along the radial direction of the sleeve part 162, and the flange part 163 resists The first step surface is 152.

The sleeve part 162 is a cylinder with a hollow center, and the hollow part is also in the shape of a cylinder. The second positioning hole 161 is opened in the sleeve part 162 . The flange portion 163 is a structure in which the inner sleeve 16 protrudes toward the radial direction of the outer sleeve 15 and is annular in shape like a flange piece. In this embodiment, the flange portion 163 is located at one end of the sleeve portion 162 so that one side of the flange portion 163 resists the first step surface 152 and the other side faces the direction in which the connector 18 is installed for resisting. The connecting piece 18 is inserted into the mounting hole 131 and tightened until it closely abuts the flange portion 163 . The first step surface 152 is located in the outer sleeve 15 and is annular. The void in the middle of the annular shape is used for the sleeve part 162 to be inserted. The sleeve part 162 passes through the gap in the middle of the first step surface 152 and resists the outer sleeve 15 to form an interference fit.

In this embodiment, the first step surface 152 is provided on the outer sleeve 15 and the corresponding flange portion 163 is provided on the inner sleeve 16 to reduce the probability of relative axial displacement between the outer sleeve 15 and the inner sleeve 16 and further improve The service life of the sleeve assembly 14.

Optionally, the outer sleeve 15 includes a first section 153 and a second section 154 arranged coaxially. The inner diameter of the first section 153 is smaller than the inner diameter of the second section 154 , so that a third section is formed on the inner circumferential surface of the outer sleeve 15 . One step surface 152. The outer diameter of the first section 153 is smaller than the outer diameter 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 .

The first section 153 and the second section 154 are connected in sequence, the second section 154 is connected to the main body of the box 10, the first section 153 shrinks inward relative to the second section 154 and is connected to the sleeve portion 162 of the inner sleeve 16, so To reduce material consumption and reduce the overall weight of the sleeve assembly 14. The first section 153 has an interference fit with the sleeve portion 162 to ensure the connection strength between the inner sleeve 16 and the outer sleeve 15 . The first positioning hole 151 is opened in the first section 153 and is opposite to the second positioning hole 161 on the sleeve portion 162 so that the limiting members 17 can pass through in order to position the inner sleeve 16 and the outer sleeve 15 . The second step surface 155 is provided on the outer peripheral surface of the outer sleeve 15 at the junction of the first section 153 and the second section 154. The second step surface 155 is a flat surface, which reduces the risk of interference with the installation path of the limiter 17. , to improve convenience.

In this embodiment, a narrowed first section 153 is provided on the outer sleeve 15 so that the sleeve portion 162 of the inner sleeve 16 is closely fitted in the first section 153 and at the same time the flange portion 163 and the first step surface 152 Tightly resist, while reducing material consumption and reducing the weight of the sleeve assembly 14 .

An embodiment of the present application also provides a battery 100, which includes a battery cell 20 and a box 10 as in the previous embodiments. For descriptions of the battery cells 20 and the box 10 , reference may be made to the foregoing embodiments, and for the sake of brevity, they will not be described again here.

An embodiment of the present application also provides an electrical equipment, including an electrical equipment body, and a battery 100 as in the previous embodiments. The battery 100 is mounted on the electrical equipment body through a connector 18 that is passed through the inner sleeve 16 , the battery 100 is used to provide electrical energy. Alternatively, the electrical equipment body may be a vehicle 1000, a ship or a spacecraft.

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

Claims

A box (10) used to accommodate battery cells (20), including:

The box body (13) has a mounting hole (131);

The sleeve assembly (14) is at least partially disposed in the mounting hole (131). The sleeve assembly (14) includes an outer sleeve (15) and an inner sleeve (16) that are fixed to each other. The sleeve (15) is set on the outside of the inner sleeve (16). The outer sleeve (15) is made of the same material as the box body (13). The outer sleeve (15) Welded to the box body (13), the wear resistance of the material of the inner sleeve (16) is higher than the wear resistance of the material of the outer sleeve (15).
The box (10) according to claim 1, wherein the outer sleeve (15) is made of aluminum alloy, and the inner sleeve (16) is made of steel.
The box (10) according to claim 1 or 2, wherein the outer sleeve (15) and the inner sleeve (16) have an interference fit.
The box (10) according to any one of claims 1 to 3, wherein the outer peripheral surface of the inner sleeve (16) is provided with anti-slip patterns.
The box (10) according to any one of claims 1-4, wherein the sleeve assembly (14) further includes a limiting member (17) configured to limit the The inner sleeve (16) rotates circumferentially relative to the outer sleeve (15).
The box (10) according to claim 5, wherein the outer sleeve (15) is provided with a first positioning hole (151), and the inner sleeve (16) is provided with a second positioning hole (151). 161), the limiting member (17) is a positioning pin inserted into the first positioning hole (151) and the second positioning hole (161).
The box (10) according to any one of claims 1 to 6, wherein a first step surface (152) is formed on the inner peripheral surface of the outer sleeve (15), and the inner sleeve (16 ) including sleeve part (162) and a flange portion (163). The flange portion (163) is located at one end of the sleeve portion (162). The flange portion (163) is along the diameter of the sleeve portion (162). Protruding from the outer peripheral surface of the sleeve part (162), the flange part (163) resists the first stepped surface (152).
The box (10) according to claim 7, wherein the outer sleeve (15) includes a first section (154) and a second section (155) arranged coaxially, and the first section (154) The inner diameter of the second section (155) is smaller than the inner diameter of the second section (155), so that the first step surface (152) is formed on the inner circumferential surface of the outer sleeve (15); the outer surface of the first section (154) The diameter is smaller than the outer diameter of the second section (155), so that a second step surface (155) is formed on the outer peripheral surface of the outer sleeve (15); the sleeve part (162) is located on the first Within paragraph (154).
A battery (100) includes a battery cell (20) and the box (10) according to any one of claims 1 to 8.
An electrical equipment, including an electrical equipment body, and a battery (100) as claimed in claim 9, the battery (100) being hung through a connector (18) passed through the inner sleeve (16). Mounted on the body of the electrical equipment, the battery (100) is used to provide electrical energy.