CN216903107U

CN216903107U - Battery pack, battery and power consumption device

Info

Publication number: CN216903107U
Application number: CN202220012197.0U
Authority: CN
Inventors: 侯跃攀; 周聪
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-07-05
Anticipated expiration: 2032-01-05
Also published as: WO2023130601A1

Abstract

The application provides a battery pack, a battery and an electric device, which are used in the technical field of batteries and energy storage equipment. The battery pack includes: a battery module; the two heat management components are respectively arranged on two sides of the battery module and used for exchanging heat for the battery module; wherein, the heat management component is provided with a joint; the battery module is provided with an intermediate connecting part; the length of the middle connecting part is adjustable; the joints of the two thermal management components communicate through an intermediate connection. Through the middle connecting portion with adjustable length, can realize the simple and easy dismouting to the thermal management system pipeline in box inside, reduce cost of maintenance.

Description

Battery pack, battery and power consumption device

Technical Field

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

Background

Batteries are widely used in electronic devices such as vehicles, energy storage devices, ships, spacecraft, power tools, and the like.

The battery usually uses the thermal management system to dispel the heat, but when carrying out maintenance to the thermal management system, can only dismantle joint among them with the pipeline, and the cost of maintenance is high. Therefore, it is necessary to solve the technical problem of the difficulty in removing the joint and the pipeline.

SUMMERY OF THE UTILITY MODEL

The application provides a battery pack, battery and electric device can realize the simple and easy dismouting to the heat management system pipeline in the inside narrow and small space of box, reduces cost of maintenance.

According to a first aspect of the present application, there is provided a battery assembly comprising: a battery module; the two heat management parts are respectively arranged on two sides of the battery module and are used for exchanging heat for the battery module; wherein, the heat management component is provided with a joint; the battery module is provided with an intermediate connecting part; the length of the middle connecting part is adjustable; the joints of the two thermal management components communicate through an intermediate connection.

In the embodiment of the application, through the intermediate connecting part intercommunication that length adjustable connects and heat management part, required operating space is little when dismantling intermediate connecting part, can reduce the influence to battery module and other parts inside the battery for the easy dismounting of intermediate connecting part and joint is simple.

In some embodiments, the intermediate connection comprises a fixed tube and at least one moving tube movably and sealingly connected to the fixed tube. The movable pipe is movably connected with the fixed pipe in a sealing mode, the sealing effect between the heat management component and the middle connecting portion is guaranteed, meanwhile, the expansion and contraction of the middle connecting portion are facilitated, and the movable pipe is convenient to disassemble and assemble.

In some embodiments, the number of the moving pipes is two, the moving pipes are respectively connected with the fixed pipes at two ends of the fixed pipes, and each joint is respectively connected with one moving pipe. Two removal pipes are connected with two joints respectively, during the dismantlement, draw close two removal pipes along fixed pipe axis, can shorten intermediate junction for the dismouting is simple and easy convenient more.

In some embodiments, the mobile pipe is connected to the fixed pipe casing; remove and be equipped with first seal structure between pipe and the fixed pipe, first seal structure is used for realizing removing the movably sealed of pipe and fixed pipe. The first sealing structure can realize movable sealing of the movable pipe and the fixed pipe, and further ensures the sealing effect between the heat management component and the middle connecting part.

In some embodiments, a limiting structure is further arranged between the moving pipe and the fixed pipe, and the limiting structure is used for limiting the moving pipe to be separated from the fixed pipe. The limiting structure is located between the movable pipe and the fixed pipe, and the limiting structure can limit the movable pipe to move along the axial direction, so that the stability of connection between the middle connecting part and the joint is further ensured.

In some embodiments, the fitting is provided with a protrusion and the moving tube is provided with a gripping member that snap-connects with the protrusion to secure the moving tube and the fitting. The clamping member and the protrusion are connected through a buckle to fix the movable pipe and the joint, so that the movable pipe and the joint are simple in matching relation and convenient to detach.

In some embodiments, the gripping member comprises a catch provided at an end of the moving tube and a pressing mechanism; one end of the pressing mechanism is connected with the buckle, the other end of the pressing mechanism extends to the outer pipe wall of the moving pipe, and the pressing mechanism is configured to move the buckle along the radial direction of the fixing portion to be far away from the protrusion when pressing. The pressing mechanism is configured to move along the radial direction of the fixed pipe to be away from the protrusion when pressed, so that the clamping member is separated from the protrusion, the two movable pipes are close to each other, the total length of the intermediate connecting part is shortened, the intermediate connecting part is convenient to take down, and the simple disassembly and assembly of the intermediate connecting part and the joint can be realized.

In some embodiments, a second sealing structure is also provided between the mobile pipe and the fitting. The second sealing structure can realize the sealing of the movable pipe and the joint, prevent fluid or solid particles from overflowing from the joint surface of the movable pipe and the joint, and ensure the sealing effect of the middle connecting part and the joint, thereby ensuring the sealing performance of the heat management part in the working process.

In some embodiments, the limiting structure comprises a blocking part arranged on the movable pipe and a limiting part arranged on the fixed pipe, and the first blocking part and the limiting part are matched to limit the movable pipe to be separated from the fixed pipe. The limiting structure comprises a blocking part arranged on the movable pipe and a limiting part arranged on the fixed pipe, wherein the blocking part and the fixed pipe are abutted to form clearance fit so as to limit the movable pipe to move along the axial direction.

In some embodiments, the battery assembly further includes an elastic buffer member disposed between the blocking portion and the stopper portion. The elastic buffer piece is arranged between the blocking part and the limiting part and can offset the tolerance of the space between the blocking part of different moving pipes and the limiting part of the fixed pipe.

According to a second aspect of the present application, there is provided a battery comprising: the battery module of the first aspect; and the box body is used for accommodating the battery component.

According to a third aspect of the present application, there is provided an electric device including: the battery of the second aspect, the battery for providing electrical energy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on the drawings without any creative effort.

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 cell according to one embodiment of the present application;

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

FIG. 4 is a top view of a battery assembly according to one embodiment of the present application;

FIG. 5 is a cross-sectional view of the battery assembly of the embodiment shown in FIG. 4;

FIG. 6 is an enlarged view taken at A in FIG. 5;

FIG. 7 is an exploded view of an intermediate connection according to one embodiment of the present application;

fig. 8 is an exploded view of an intermediate connection portion according to an embodiment of the present application.

Description of the labeling:

1-a vehicle; 10-a battery; 11-a controller; 12-a motor;

2-a box body; 21-loading the box body; 22-lower box body;

3-a battery assembly; 31-a battery module; 32-a thermal management component; 321-a linker; 321 a-a protrusion;

4-an intermediate connection; 41-fixed tube; 42-a moving tube; 421-a clamping member; 421 a-buckle; 421 b-pressing mechanism; 43-a first seal structure; 44-a second sealing structure; 45-a limiting structure; 451-a stopper portion; 452-a barrier; 46-elastomeric buffer.

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 in the present application 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 figures above, are intended to cover non-exclusive inclusions.

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 a person skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 appearances of "a plurality" in this application are intended to mean more than two (including two).

Reference to a battery in embodiments of the present application 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. Batteries generally include a case for housing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charging or discharging of battery monomer.

In order to meet different power requirements, the battery may include a plurality of battery cells, wherein the plurality of battery cells may be connected in series or in parallel or in series-parallel, and the series-parallel refers to a mixture of series connection and parallel connection.

In the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiments of the present application. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in an encapsulation manner: the single battery of cylindricality battery, square battery monomer and laminate polymer battery monomer, this application embodiment is also not limited to this.

The battery monomer comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive plate, a negative plate and an isolating membrane. The battery cell mainly depends on metal ions moving between the positive plate and the negative plate to work. The positive plate comprises a positive current collector and a positive active substance layer, wherein the positive active substance layer is coated on the surface of the positive current collector, the current collector which is not coated with the positive active substance layer protrudes out of the current collector which is coated with the positive active substance layer, and the current collector which is not coated with the positive active substance 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 pole piece includes negative current collector and negative pole active substance layer, and the negative pole active substance layer coats in the surface of negative current collector, and the mass flow body protrusion in the mass flow body of coating the negative pole active substance layer of uncoated negative pole active substance layer, the mass flow body of uncoated negative pole active substance 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). In addition, the electrode assembly may have a winding structure or a lamination structure, and the embodiment of the present application is not limited thereto.

The performance and the service life of the battery are influenced by the temperature, and a heat management system is generally adopted to carry out heat dissipation treatment on the battery, so that the working state and the service life of the battery are improved. When the heat management system is maintained in the battery, the space in the battery box is narrow, so that the pipeline is not easy to disassemble and assemble. The joints of the thermal management system can only be removed with the pipe, which is costly to maintain.

In order to solve the problem, the inventor proposes to provide an intermediate connecting part with a telescopic length between the joints, so that the joints and the intermediate connecting part are ensured to be in sealed connection, meanwhile, the pipelines of the thermal management system are simply disassembled and assembled in a narrow space in the box body, and the maintenance cost is reduced.

One embodiment of the present application provides an electric device, and a battery is used for providing electric energy.

The technical scheme described in the embodiment of the application is suitable for batteries and various electric devices using the batteries, wherein the electric devices can be vehicles, portable devices, ships, spacecrafts, electric toys and the like. The vehicle can be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like; spacecraft include aircraft, rockets, space shuttles, and spacecraft, among others; the electric toy includes a stationary or mobile electric toy, such as an electric car toy, an electric ship toy, an electric airplane toy, and the like.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to be applied to the above-described apparatuses, but may also be applied to energy storage power systems of hydraulic power, thermal power, wind power, and solar power stations, and all apparatuses using batteries in the fields of military equipment, and the like.

For example, as shown in fig. 1, a schematic structural diagram of a vehicle 1 according to an embodiment of the present application is shown. The vehicle 1 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like. The battery 10 may be provided inside the vehicle 1, and specifically, for example, the battery 10 may be provided at the bottom of the vehicle 1 or at the head or tail of the vehicle. The battery 10 may be used for power supply of the vehicle 1, and for example, the battery 10 may serve as an operation power source of the vehicle 1. The vehicle 1 may further comprise a controller 11 and a motor 12, the controller 11 being used, for example, to control the battery 10 to power the motor 12. The battery 10 can be used for power demand during starting, navigation and operation of the vehicle 1, and of course, the battery 10 can also be used for driving the vehicle 1 to run, instead of or partially replacing fuel oil or natural gas to provide driving power for the vehicle 1.

Fig. 2 is a schematic diagram of a battery 10 according to an embodiment of the present disclosure. The battery 10 may include a battery module 31 and a case 2, the number of the battery modules 31 may be one or more, when the battery module 31 is plural, the plurality of battery modules 31 are arranged in the case 2, and the battery module 31 may further include a plurality of battery cells, and the plurality of battery cells are connected in parallel or in series-parallel with each other to form the battery module 31. The casing 2 may comprise two parts, here called upper casing 21 and lower casing 22, respectively, the upper casing 21 and the lower casing 22 being snap-fitted together. The shape of the upper case 21 and the lower case 22 may be determined according to the shape of the combination of the battery modules 31, and the upper case 21 and the lower case 22 may each have one opening. For example, the upper casing 21 and the lower casing 22 may be hollow cuboids, only one surface of each of the upper casing 21 and the lower casing 22 is an opening surface, the opening of the upper casing 21 and the opening of the lower casing 22 are oppositely arranged, and the upper casing 21 and the lower casing 22 are buckled with each other to form a casing with a closed chamber. The upper casing 21 may be a rectangular parallelepiped having an opening and the lower casing 22 may be plate-shaped, or the lower casing 22 may be a rectangular parallelepiped having an opening and the upper casing 21 may be plate-shaped, and the upper casing 21 and the lower casing 22 may be disposed to face each other and engaged with each other to form the casing 2 having a closed chamber. A plurality of battery modules 31 are arranged in a row in the case 2 formed by engaging the upper case 21 with the lower case 22. The engaging portion of the upper case 21 and the lower case 22 can be sealed by a sealing element, which can be a sealing ring, a sealant, etc.

Optionally, the battery 10 may also include other structures, which are not described in detail herein. For example, an assembly of a plurality of layers of battery modules 31, or a bus member, a signal collection harness, a processor, and the like are provided.

Fig. 3 is a schematic structural diagram of a battery assembly 3 according to an embodiment of the present application. Fig. 4 is a plan view of battery assembly 3 according to an embodiment of the present application.

The battery 10 may include a battery assembly 3 and a case 2, the case 2 accommodating the battery assembly 3.

As shown in fig. 3 and 4, the present application provides a battery assembly 3 including a battery module 31, a thermal management member 32, and an intermediate connection part 4. The two thermal management components 32 are respectively arranged on two sides of the battery module 31 and used for exchanging heat with the battery module 31; wherein, the thermal management component 32 is provided with a joint 321; the battery module 31 is provided with an intermediate connecting part 4, and the length of the intermediate connecting part 4 is adjustable; the joints 321 of the two thermal management components 32 communicate through the intermediate connection 4.

The battery assembly 3 may include a battery module 31 and a thermal management member 32, and the battery module 31 may include a plurality of battery cells, which are sequentially stacked and arranged to constitute the battery module 31. The thermal management component 32 is used to exchange heat for the battery 10 when the battery 10 is in operation to ensure that the battery 10 is operating within a suitable temperature range. The thermal management component 32 generally includes various manners such as water cooling, air cooling, direct cooling, and the like, and the thermal management component 32 may include a transport medium unit, a measurement and control unit, and the like, where the transport medium unit transfers heat generated by the battery module 31 to the external environment through the flow of a medium after contacting the battery module 31, and the medium in the transport medium unit may be, for example, air, a liquid, a phase change material, and the like, and specifically, the medium may be, for example, at least one of water and ethylene glycol, and may be water or ethylene glycol, or a mixed solution of water and ethylene glycol. The measurement and control unit can perform corresponding heat treatment by measuring real-time temperatures of the battery 10 and the battery module 31, even the battery cells, at different positions. In some examples, the thermal management component 32 may further include a power unit, the power unit may be, for example, a fan, a pump, or the like, the measurement and control unit may control the power unit to perform different thermal treatments, and the power unit drives the medium to flow in the transportation medium unit, so as to realize the circulation of the medium in the thermal management component 32 and take away heat generated by the battery 10 during operation. Specifically, the heat dissipation performance of thermal management component 32 is proportional to the flow rate of the medium, which is related to the power unit power. For example, as shown in fig. 3, the thermal management component 32 may be a cooling component disposed on both sides of the battery module 31, and the thermal management component 32 may also be used to heat a plurality of battery cells, which is not limited in the embodiment of the present application.

The thermal management component 32 is provided with a joint 321, the material of the joint 321 may be natural rubber, styrene butadiene rubber, or butadiene rubber, etc., wherein the material using ethylene propylene rubber, fluororubber, or silicon rubber also has the characteristics of acid and alkali resistance, high temperature resistance, and may also be a metal material that resists corrosion, expansion and contraction, such as iron, stainless steel, copper-zinc alloy, etc., or may also be a composite material combining plastic, hot melt adhesive, and alloy. Alternatively, the connector 321 and the thermal management member 32 may be integrally formed or may be a split structure. The joints 321 and the thermal management member 32 are of a split structure, and the joints 321 may be connected to both ends of the thermal management member 32 along the length direction of the battery module 31 by bonding, clamping, bolting, or welding, wherein the number of the joints 321 and the position thereof in the vertical direction are not limited in the present application as long as a medium can flow through the thermal management member 32 through the joints 321.

The battery module 31 is further provided with the intermediate connecting parts 4 which are used for communicating the joints 321 with the thermal management parts 32, the length of each intermediate connecting part 4 can be adjusted, expansion and contraction change can be achieved in the space inside the battery 10, the intermediate connecting parts 4 are located between the joints 321 of the two adjacent thermal management parts 32 and abut against the battery module 31, and particularly, when the width of the side face, in contact with the intermediate connecting parts 4, of the battery module 31 is small, the intermediate connecting parts 4 can be disassembled and assembled by adjusting the length, and limitation on the size of the space is reduced.

The length-adjustable intermediate connecting part 4 is communicated with the joint 321 and the thermal management part 32, so that the required operating space is small when the intermediate connecting part 4 is detached, the influence on the battery module 31 and other parts in the battery 10 can be reduced, and the intermediate connecting part 4 and the joint 321 are convenient and simple to disassemble and assemble.

In some embodiments, the intermediate connection 4 comprises a fixed tube 41 and at least one moving tube 42, the moving tube 42 being movably and sealingly connected with the fixed tube 41.

The moving tube 42 is adapted to communicate with the joint 321 to effect a flow of media between the plurality of thermal management components 32, constituting a circulatable loop. The moving pipe 42 is hermetically connected to the fixed pipe 41 to prevent the medium from overflowing from the gap of the moving pipe 42. Alternatively, the outer diameter of the fixed pipe 41 is smaller than the inner diameter of the moving pipe 42, and the outer diameter of the joint 321 is smaller than the inner diameter of the moving pipe 42, so as to achieve the sealing connection of the intermediate connection part 4 and the joint 321. The material of the fixed pipe 41 and the moving pipe 42 may be the same or different. For example, the fixed pipe 41 and the movable pipe 42 may be composed of a rubber layer and a skeleton layer, the skeleton layer may be made of cotton fiber, various synthetic fibers, carbon fiber or asbestos, steel wire, etc., and the rubber layer may be made of natural rubber, styrene butadiene rubber, or butadiene rubber, etc. The fixed pipe 41 and the movable pipe 42 may be made of a metal material, a composite material, or the like, which is not limited in the present application. The fixing tube 41 has high temperature resistance, small thermal deformation, smooth inner wall, small fluid resistance, high pressure bearing capacity and the like. Alternatively, the movable tube 42 and the fixed tube 41 may be mounted by means of a ferrule type or screw connection.

The movable pipe 42 is movably and hermetically connected with the fixed pipe 41, so that the expansion and contraction of the intermediate connecting part 4 are facilitated while the sealing effect between the thermal management part 32 and the intermediate connecting part 4 is ensured, and the disassembly and assembly are facilitated.

In some embodiments, two movable tubes 42 are provided, and are respectively connected to the fixed tubes 41 at both ends of the fixed tubes 41, and one movable tube 42 is connected to each joint 321.

As shown in fig. 4, the two movable pipes 42 are respectively connected to the two joints 321, and when disassembling, the two movable pipes 42 are drawn together along the central axis of the fixed pipe 41, so as to shorten the middle connection portion 4, and make the disassembling and assembling easier and more convenient.

In some embodiments, the moving tube 42 is sleeved with the fixed tube 41; a first sealing structure 43 is arranged between the moving pipe 42 and the fixed pipe 41, and the first sealing structure 43 is used for realizing movable sealing between the moving pipe 42 and the fixed pipe 41.

As shown in fig. 5, which is a cross-sectional view of battery assembly 3 according to an embodiment of the present application, first sealing structure 43 is located between moving pipe 42 and fixed pipe 41, and first sealing structure 43 prevents fluid or solid particles from escaping from the interface between moving pipe 42 and fixed pipe 41. Illustratively, the first sealing structure 43 may be a sealing strip or a sealing ring, etc. The sealing ring can be made of nitrile rubber, silicon rubber, fluororubber and the like, has certain elasticity and cannot corrode a contact surface. The shape and material of the first sealing structure 43 may be adjusted according to the structure and properties of the connection portion of the movable pipe 42 and the fixed pipe 41, which is not limited in the present application. Specifically, the number of the first sealing structures 43 may be one or more, as long as the sealing effect can be achieved, and the application is not limited thereto.

The first sealing structure 43 can achieve movable sealing between the movable tube 42 and the fixed tube 41, and further ensure sealing effect between the thermal management component 32 and the intermediate connecting part 4.

It is understood that the first sealing structure 43 is disposed between the inner circumferential surface of the moving pipe 42 and the outer circumferential surface of the fixed pipe 41, the fixed pipe 41 is provided with corresponding groove portions for housing the first sealing structure 43, and the first sealing structure 43 is compressively interposed between the inner circumferential surface of the moving pipe 42 and the outer circumferential surface of the fixed pipe 41 in the radial direction of the fixed pipe 41. The radial direction is a direction passing through the axial center line in a radial plane, and the radial direction of the fixing tube 41 may be a direction of a straight line on which a diameter or a radius on a cross section of the fixing tube 41 where the buckle 421a is located.

In some embodiments, a limiting structure 45 is further disposed between the moving tube 42 and the fixed tube 41, and the limiting structure 45 is used for limiting the moving tube 42 from being separated from the fixed tube 41.

As shown in fig. 5, the limiting structure 45 is located between the movable tube 42 and the fixed tube 41, and the limiting structure 45 can limit the movement of the movable tube 42 along the axial direction, so as to further ensure the stability of the connection between the intermediate connection part 4 and the joint 321.

In some embodiments, the joint 321 is provided with a protrusion 321a, the moving tube 42 is provided with a catching member 421, and the catching member 421 is snap-coupled with the protrusion 321a to fix the moving tube 42 and the joint 321.

Fig. 6 is an enlarged view at a in the cross-sectional view of the battery assembly 3 shown in fig. 5. As shown in fig. 6, a protrusion 321a extends outward from the joint 321, and the fastening member 421 and the protrusion 321a are connected together in a snap-fit manner to be fixed. Specifically, the protrusion 321a may protrude in a vertical direction or may protrude obliquely, and when the protrusion 321a protrudes obliquely, a gap exists between a surface of the protrusion 321a abutting against the chucking member 421 and an outer circumferential surface of the joint 321.

The chucking member 421 fixes the moving tube 42 and the joint 321 by the chucking connection with the protrusion 321a, so that the fitting relationship between the moving tube 42 and the joint 321 is simple and the detachment is convenient.

In some embodiments, the gripping member 421 includes a catch 421a and a pressing mechanism 421b, the catch 421a being provided at the end of the moving tube 42; one end of the pressing mechanism 421b is connected to the catch 421a, the other end of the pressing mechanism 421b extends to the outer tube wall of the moving tube 42, and the pressing mechanism 421b is configured such that, when pressed, the catch 421a moves in the radial direction of the fixed tube 41 to be away from the protrusion 321 a.

Fig. 7 is an exploded view of the intermediate connection portion 4 according to an embodiment of the present application. Fig. 8 is an exploded view of the intermediate connection portion 4 according to an embodiment of the present application.

As shown in fig. 7 and 8, the fastening member 421 includes a catch 421a and a pressing mechanism 421b, the catch 421a is connected to the protrusion 321a by the catch, and the pressing mechanism 421b can control the movement of the catch 421 a. Specifically, the catch 421a and the pressing mechanism 421b are integrally molded. When the intermediate connection portion 4 is detached, the pressing mechanism 421b is pressed vertically downward, and the catch 421a may be tilted in the radial direction of the fixed pipe 41 to release the protrusion 321a of the joint 321.

The pressing mechanism 421b is configured such that, when pressed, the catch 421a moves in the radial direction of the fixed tube 41 to move away from the protrusion 321a, so that the catch member 421 is separated from the protrusion 321a, the two moving tubes 42 approach each other, the total length of the intermediate connection portion 4 is shortened, the intermediate connection portion 4 is easily removed, and easy attachment and detachment of the intermediate connection portion 4 to the joint 321 is achieved.

In some embodiments, a second seal 44 is also provided between the travel tube 42 and the fitting 321.

As shown in fig. 5, the material of the second sealing structure 44 may be the same as or different from that of the first sealing structure 43, as long as the shape, material and number of the second sealing structure 44 can meet the requirement of the sealing effect of the movable pipe 42 and the joint 321, which is not limited in the present application.

The second sealing structure 44 can seal the moving pipe 42 and the joint 321, prevent fluid or solid particles from overflowing from the joint surface of the moving pipe 42 and the joint 321, and ensure the sealing effect of the intermediate connecting part 4 and the joint 321, thereby ensuring the sealing performance of the thermal management component 32 in the working process.

It is understood that the second sealing structure 44 is disposed between the inner circumferential surface of the moving tube 42 and the outer circumferential surface of the joint 321, the joint 321 is provided with a corresponding groove for housing the second sealing structure 44, and the second sealing structure 44 is compressively interposed between the inner circumferential surface of the moving tube 42 and the outer circumferential surface of the joint 321 in the radial direction of the moving tube 42. The radial direction of the moving pipe 42 may be a direction of a straight line on which a diameter or a radius on the cross section of the moving pipe 42 where the second seal structure 44 is located.

In some embodiments, the limiting structure 45 includes a blocking portion 452 provided on the moving tube 42 and a limiting portion 451 provided on the fixed tube 41, and the blocking portion 452 and the limiting portion 451 cooperate to limit the moving tube 42 from being detached from the fixed tube 41.

As shown in fig. 5, the limiting structure 45 includes a blocking portion 452 disposed on the movable tube 42 and a limiting portion 451 disposed on the fixed tube 41, and the blocking portion 452 abuts against the fixed tube 41 to form a clearance fit so as to limit the movement of the movable tube 42 in the axial direction.

In some embodiments, the battery assembly 3 further includes an elastic buffer 46, and the elastic buffer 46 is disposed between the blocking portion 452 and the restraining portion 451.

The elastic buffer 46 fills the space between the stopper portion 452 and the stopper portion 451, and the material of the elastic buffer 46 may be an elastic material such as plastic, rubber, or spring. When the intermediate connection portion 4 is assembled, the elastic buffer 46 is interposed between the stopper portion 452 and the stopper portion 451 in a compressed state so as to cancel out a tolerance of the size of the space between the stopper portion 452 of the movable tube 42 and the stopper portion 451 of the fixed tube 41. When the intermediate connection portion 4 is removed, the locking member 421 is disengaged from the protrusion 321a, the two moving pipes 42 approach each other, the total length of the intermediate connection portion 4 is shortened, the space between the stopper portion 452 and the stopper portion 451 is enlarged, and the elastic cushion member 46 is disposed in the space after being restored. Alternatively, when the moving tube 42 is again fixedly connected to the joint 321, the elastic buffer 46 is again in a compressed state.

The elastic buffer 46 is disposed between the stopper portion 452 and the stopper portion 451 to offset a tolerance in the size of a space between the stopper portion 452 of the movable tube 42 and the stopper portion 451 of the fixed tube 41.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein, but rather to cover all embodiments falling within the scope of the appended claims.

Claims

1. A battery assembly, comprising:

a battery module;

the two heat management components are respectively arranged on two sides of the battery module and used for exchanging heat for the battery module;

wherein a joint is arranged on the heat management component;

the battery module is provided with an intermediate connecting part, and the length of the intermediate connecting part is adjustable;

the joints of the two thermal management components communicate through the intermediate connection.

2. The battery assembly of claim 1, wherein the intermediate connection portion comprises a stationary tube and at least one moving tube movably and sealingly coupled to the stationary tube.

3. The battery pack according to claim 2, wherein the number of the moving pipes is two, the moving pipes are connected to the fixed pipes at both ends of the fixed pipes, and one moving pipe is connected to each of the joints.

4. The battery assembly of claim 3, wherein the mobile tube is coupled to the stationary sleeve; a first sealing structure is arranged between the moving pipe and the fixed pipe and used for achieving movable sealing of the moving pipe and the fixed pipe.

5. The battery pack of claim 3, wherein a limiting structure is further disposed between the movable tube and the fixed tube, and the limiting structure is configured to limit the movable tube from being detached from the fixed tube.

6. The battery pack of claim 2, wherein the joint is provided with a protrusion, and the moving tube is provided with a catching member, which is snap-coupled with the protrusion to fix the moving tube and the joint.

7. The battery assembly of claim 6, wherein the gripping member comprises a snap and a press mechanism, the snap being provided at an end of the moving tube; one end of the pressing mechanism is connected with the buckle, the other end of the pressing mechanism extends to the outer pipe wall of the moving pipe, and the pressing mechanism is configured to move the buckle along the radial direction of the fixed pipe to be away from the protrusion when being pressed.

8. The battery assembly of claim 2, wherein a second seal structure is further provided between the moving tube and the tab.

9. The battery assembly of claim 5, wherein the limiting structure comprises a blocking portion disposed on the movable tube and a limiting portion disposed on the fixed tube, the blocking portion and the limiting portion cooperating to limit the movable tube from disengaging from the fixed tube.

10. The battery assembly of claim 9, further comprising an elastomeric buffer disposed between the blocking portion and the restraining portion.

11. A battery, comprising:

the battery module of any one of claims 1-10; and

a case for accommodating the battery assembly.

12. An electric device, comprising:

the battery of claim 11, wherein the battery is configured to provide electrical energy.