Battery device, energy storage device and power utilization device

Abstract

The embodiment of the utility model provides a battery device, an energy storage device and a power utilization device. The battery device comprises a box body assembly, a battery monomer assembly, a heat exchange assembly and a connecting piece, and the battery monomer assembly is arranged in the box body assembly. The heat exchange assembly is arranged in the box body assembly. At least one medium runner is arranged in the heat exchange assembly and is used for conducting a heat exchange medium, and the heat exchange medium is used for carrying out heat exchange with the battery monomer assembly. The connecting piece comprises a connecting body and a connecting pipe, the connecting body is connected to the box body assembly, and the connecting pipe is connected with the heat exchange assembly. The connecting body and at least part of the connecting pipe are of an integrated structure. And at least part of the connecting piece is of a flexible structure, so that the heat exchange assembly is flexibly connected with the box body assembly through the connecting piece. The connecting piece is provided with a connecting channel, and the medium flow channel communicates with the outside of the box body assembly through the connecting channel. And the assembly efficiency and the connection reliability can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device, an energy storage device and an electric device. BACKGROUND

[0002] This section is intended to provide background or context to the embodiments of the application. The description herein is not admitted to be prior art merely because it is included in this section.

[0003] In the new energy technology with the battery device, the battery device can be used to provide power in whole or in part. In the use process of the battery device, the battery monomer in the battery device will generate heat. If the heat is too high, it will have an adverse effect on the performance and service life of the battery device. Therefore, how to effectively dissipate the heat of the battery monomer of the battery device has become an important research direction in the field. In the related technology, the battery monomer is heat exchanged by a heat exchange assembly, and the inlet and outlet of the heat exchange assembly are connected with the external pipeline through the adapter pipeline, which occupies a large space, thereby causing the problem of non-compact structure of the battery device. UTILITY MODEL CONTENT

[0004] Therefore, the embodiments of the present application expect to provide a battery device, an energy storage device and an electric device, which can improve the compactness of the structure of the battery device.

[0005] To this end, a first aspect of the embodiments of the present application provides a battery device, comprising:

[0006] a box assembly;

[0007] a battery monomer assembly, the battery monomer assembly being arranged in the box assembly;

[0008] a heat exchange assembly, the heat exchange assembly being arranged in the box assembly; the heat exchange assembly has at least one medium flow channel inside, the at least one medium flow channel being used for conducting a heat exchange medium, the heat exchange medium being used for heat exchange with the battery monomer assembly;

[0009] a connecting piece, the connecting piece comprising a connecting body and a connecting pipe, the connecting body being connected to the box assembly, the connecting pipe being connected with the heat exchange assembly, at least part of the connecting body and the connecting pipe being an integral structure, at least part of the connecting piece being a flexible structure, so that the box assembly and the heat exchange assembly are flexibly connected through the connecting piece; the connecting piece is provided with a connecting channel, and the medium flow channel is connected to the outside of the box assembly through the connecting channel.

[0010] The battery device provided by the embodiment of the present application comprises a box assembly, a battery monomer assembly, a heat exchange assembly and a connecting piece. The battery monomer assembly is arranged in the box assembly, the box assembly protects the battery monomer assembly, and the heat exchange assembly is used for heat exchange with the battery monomer assembly. The connecting body of the connecting piece can be directly connected with the box assembly, and the connecting pipe of the connecting piece can be directly connected with the heat exchange assembly, so that the connection between the two is realized without other components, thereby facilitating the reduction of components, the reduction of cost and the reduction of occupied space, the improvement of structural compactness of the battery device, and the improvement of energy density of the battery device. In addition, at least part of the connecting piece is a flexible structure, so that the heat exchange assembly and the box assembly are flexibly connected through the connecting piece, that is, the connection between at least part of the connecting piece and the box assembly is a connection mode that can be axially stretched and contracted, folded and vertically axially displaced by a certain displacement amount, so that the assembly tolerance between at least part of the connecting piece and the box assembly and between at least part of the connecting piece and the heat exchange assembly is absorbed, thereby facilitating the improvement of assembly efficiency and connection reliability between the heat exchange assembly and the box assembly. In addition, at least part of the connecting body and the connecting pipe is an integral structure, which is conducive to further improving the assembly efficiency between the connecting piece, the heat exchange assembly and the box assembly.

[0011] In some embodiments, the connecting pipe comprises a flexible connecting pipe, and the flexible connecting pipe is flexibly connected with the connecting body.

[0012] In this embodiment, the flexible connecting pipe and the connecting body are flexibly connected, and the connecting body is connected with the box assembly, so that the assembly tolerance between the flexible connecting pipe and the box assembly is absorbed, thereby facilitating the improvement of assembly efficiency and connection reliability between the flexible connecting pipe and the box assembly.

[0013] In some embodiments, the connecting pipe is configured to form the flexible connecting pipe and the connecting body by double-color injection molding or secondary injection molding.

[0014] In this way, the number of components is reduced, the assembly efficiency is improved, and the structural strength and reliability of the connecting pipe are improved.

[0015] In some embodiments, part of the outer side wall of the connecting body protrudes radially outward to form a connecting part, and the connecting body is connected with the box assembly and / or the flexible connecting pipe through the connecting part.

[0016] Here, the connecting part is, for example, a flange, which facilitates the connection between the connecting body and the box assembly and / or the flexible connecting pipe, thereby improving the assembly efficiency and connection reliability.

[0017] In some embodiments, the outer sidewall of the flexible connecting pipe is radially outwardly convex to form a limiting protrusion, the connecting body forms a limiting recess, and the limiting protrusion extends into the limiting recess to limit the flexible connecting pipe from being pulled out of the connecting body.

[0018] In this embodiment, the flexible connecting pipe is provided with a limiting protrusion extending into a limiting recess of the connecting body, which is beneficial to improve the connection reliability of the flexible connecting pipe and the connecting body, thereby reducing the possibility of the flexible connecting pipe being pulled out of the connecting body.

[0019] In some embodiments, the melting point between the flexible connecting pipe and the connecting body is less than or equal to 80℃.

[0020] That is, the melting point between the flexible connecting pipe and the connecting body is relatively close, so that the injection material of the flexible connecting pipe and the injection material of the connecting body can be well intermingled during the integral injection molding, thereby being beneficial to improve the molding efficiency and yield of the connecting pipe.

[0021] In some embodiments, the elastic modulus of the flexible connecting pipe is 0.1MPa-10000MPa.

[0022] In this embodiment, the elastic modulus of the flexible connecting pipe is set to 0.1MPa-10000MPa, so that the flexible connecting pipe has a certain structural strength to improve the reliability of the connecting pipe, and also has a certain deformation capacity, so as to be beneficial to absorb the assembly error between the flexible connecting pipe and the connecting body.

[0023] In some embodiments, the wall thickness of at least part of the flexible connecting pipe is less than the wall thickness of the connecting body.

[0024] That is, by thinning the wall thickness of the flexible connecting pipe, the flexible connecting pipe can be deformed, that is, the flexible connecting pipe has a certain flexibility.

[0025] In some embodiments, the material of the flexible connecting pipe includes rubber.

[0026] The material of the flexible connecting pipe is, for example, a rubber material such as silicone rubber, ethylene propylene diene rubber (EPDM), etc. Of course, it can also be other materials with a certain elastic modulus.

[0027] In some embodiments, the connecting piece further includes a sealing piece, and the sealing piece is clamped between the connecting body and the box assembly.

[0028] That is, the sealing piece is used to seal the gap between the connecting body and the box assembly, which is beneficial to improve the sealing performance between the connecting body and the box assembly.

[0029] In some embodiments, the connecting pipe comprises a rigid connecting pipe connected with the heat exchange assembly, the rigid connecting pipe is sleeved on the outer periphery of the flexible connecting pipe, or the flexible connecting pipe is sleeved on the outer periphery of the rigid connecting pipe, or the rigid connecting pipe is connected with the flexible connecting pipe at one axial end.

[0030] The flexible connecting pipe can be flexibly connected with the connecting body and the rigid connecting pipe, and can also play a sealing role, thereby improving the connection reliability of the flexible connecting pipe with the connecting body and the rigid connecting pipe.

[0031] In some embodiments, a guide slope is formed at one end of the rigid connecting pipe connected with the flexible connecting pipe; and the distance between the guide slope and the central axis of the rigid connecting pipe gradually increases in the direction close to the heat exchange assembly.

[0032] Here, the rigid connecting pipe forms a guide slope, which is used to guide the rigid connecting pipe to extend into the flexible connecting pipe, thereby improving the assembly efficiency.

[0033] In some embodiments, the connecting body, the flexible connecting pipe and the rigid connecting pipe jointly define the connecting channel.

[0034] The medium flow channel is communicated to the outside of the box assembly through the connecting channel jointly defined by the connecting body, the flexible connecting pipe and the rigid connecting pipe.

[0035] In some embodiments, the flexible connecting pipe has a first sub-channel inside; a guide channel is formed at one end of the first sub-channel close to the heat exchange assembly, and the distance between the side wall of the guide channel and the central axis of the first sub-channel gradually increases in the direction close to the heat exchange assembly.

[0036] In this embodiment, in the direction close to the heat exchange assembly, by setting the distance between the side wall of the guide channel and the central axis of the first sub-channel to gradually increase, the rigid connecting pipe can be guided to extend into the flexible connecting pipe, thereby improving the assembly efficiency. In addition, the guide channel is beneficial to further absorbing the assembly tolerance, thereby further improving the assembly efficiency and the connection reliability.

[0037] The second aspect of the embodiment of the present application provides a power storage device comprising a plurality of the above-mentioned battery devices, and the battery devices are used to store or provide electric energy.

[0038] The third aspect of the embodiment of the present application provides a power consumption device comprising the above-mentioned battery device or the above-mentioned power storage device, and the battery device is used to store or provide electric energy. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1A structural schematic diagram of a vehicle provided for some embodiments of the present application;

[0040] Figure 2 A partial structural schematic diagram of a battery device provided for some embodiments of the present application;

[0041] Figure 3 A structural schematic diagram of a connecting piece provided for some embodiments of the present application;

[0042] Figure 4 A structural schematic diagram of a connecting piece provided for some embodiments of the present application;

[0043] Figure 5 An exploded view of Figure 4

[0044] Figure 6 A sectional view in A-A direction of Figure 4

[0045] Figure 7 A sectional view of a connecting body provided for some embodiments of the present application.

[0046] Explanation of reference signs

[0047] 10, battery cell assembly; 11, battery cell; 20, box assembly; 21, accommodating cavity; 30, connecting piece; 31, connecting body; 311, connecting part; 312, limiting groove; 32, connecting pipe; 321, flexible connecting pipe; 3211, limiting protrusion; 3212, first sub-channel; 3213, guide channel; 322, hard connecting pipe; 3221, guide inclined surface; 33, sealing piece; 34, connecting channel; 40, heat exchange assembly; 100, battery device; 200, controller; 300, motor; 1000, vehicle. DETAILED DESCRIPTION

[0048] All embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions, if not specifically stated.

[0049] All technical features and optional technical features of the present application can be combined with each other to form new technical solutions, if not specifically stated.

[0050] ​​In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error.

[0051] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] With the development of clean energy, more and more devices use electric energy as driving energy, and then as power battery which can store more electric energy and can be charged and discharged repeatedly, such as lithium ion battery. Among them, the power battery is not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields.

[0053] The present application embodiment provides a kind of electric device, including the battery device of any embodiment of the present application or the energy storage device of any embodiment of the present application, battery device is used to store or provide electric energy.

[0054] Electric device can be vehicle, mobile phone, portable device, notebook computer, ship, spacecraft, electric toy and electric tool and the like. Vehicle can be fuel automobile, gas automobile or new energy automobile, new energy automobile can be pure electric vehicle, hybrid electric vehicle or range extended vehicle and the like;Spacecraft includes airplane, rocket, space shuttle and spacecraft and the like;Electric toy includes fixed or mobile electric toy, for example, game machine, electric car toy, electric ship toy and electric plane toy and the like;Electric tool includes metal cutting electric tool, grinding electric tool, assembly electric tool and railway electric tool, for example, electric drill, electric grinder, electric wrench, electric screwdriver, electric hammer, impact drill, concrete vibrator and electric planer and the like. The present application embodiment does not make special limitation to the above electric equipment.

[0055] The following embodiments are described by taking a vehicle as an example for convenience of illustration.

[0056] Referring to Figure 1 , the vehicle 1000 can be provided with a controller 200, a motor 300 and a battery device 100. The controller 200 is configured to control the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be arranged at the bottom, front or rear of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000. For example, the battery device 100 can be used as an operating power source of the vehicle 1000, and can be used for the circuit system of the vehicle 1000, for example, for the power demand of the vehicle 1000 during starting, navigation and operation. In another embodiment of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0057] The present application provides a kind of energy storage device, including multiple battery device 100 of any embodiment of the present application, battery device 100 is used to store or provide electric energy.

[0058] The energy storage device can be used in energy storage power station, wind power generation system, solar power generation system, mobile power system or temporary power supply system, etc. The energy storage device can store electric energy as needed and output electric energy at appropriate time. For example, the energy storage device can store electric energy during low electricity consumption, and provide electric energy for related users or electric equipment during electricity peak. The energy storage system provided by the embodiment of the present application can be any power system that needs to use energy storage device.

[0059] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0060] Referring to Figure 2 , the present application provides a kind of battery device 100, battery device 100 includes box body assembly 20, battery monomer assembly 10, heat exchange assembly 40 and connecting piece 30. Battery monomer assembly 10 is arranged in box body assembly 20. Heat exchange assembly 40 is arranged in box body assembly 20. The inside of heat exchange assembly 40 has at least one medium flow channel, and at least one medium flow channel is used to guide the heat exchange medium, and the heat exchange medium is used to exchange heat with battery monomer assembly 10. Connecting piece 30 includes connecting body 31 and connecting pipe 32, connecting body 31 is connected to box body assembly 20, and connecting pipe 32 is connected with heat exchange assembly 40. At least part of connecting body 31 and connecting pipe 32 is integrated structure. At least part of connecting piece 30 is flexible structure, so that heat exchange assembly 40 and box body assembly 20 are flexibly connected through connecting piece 30. Connecting piece 30 is provided with connecting channel 34, and medium flow channel is communicated to the outside of box body assembly 20 through connecting channel 34.

[0061] The battery apparatus 100 mentioned in the embodiments of the present application can include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 can include a plurality of battery cells 11 connected in series, in parallel, or in a mixed connection through a busbar component.

[0062] In the embodiments of the present application, the battery cell 11 can be a secondary battery, which refers to a battery cell 11 that can be activated by charging after discharging.

[0063] The battery cell 11 can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application are not limited thereto.

[0064] The battery cell 11 generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator disposed between the negative electrode and the positive electrode. During the charging and discharging of the battery cell 11, active ions (e.g., lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator disposed between the positive electrode and the negative electrode can prevent the positive and negative electrodes from short-circuiting while allowing the active ions to pass through.

[0065] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of winding and stacking.

[0066] In some embodiments, the battery cell assembly 10 is generally formed by arranging a plurality of battery cells 11.

[0067] As an example, the battery cell assembly 10 can be a battery module formed by arranging and fixing a plurality of battery cells 11 into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 11 with a cable tie.

[0068] In some embodiments, the battery apparatus 100 can be a battery pack including a case assembly 20 and one or more battery cell assemblies 10, the battery cell assemblies 10 being accommodated in the case assembly 20.

[0069] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be accommodated in the case assembly 20 by fixing the battery module in the case assembly 20.

[0070] As an example, the battery cell assembly 10 can also be accommodated in the box assembly 20 by directly fixing a plurality of battery cells 11 to the box assembly 20.

[0071] As an example, the box assembly 20 can include a first box (not shown in the figure) and a second box. The first box and the second box are buckled so that a closed accommodation cavity 21 is formed inside the box assembly 20 to accommodate the battery cell assembly 10. Here, closed means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0072] As an example, the box assembly 20 can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively so that a closed accommodation cavity 21 is formed inside the box assembly 20 to accommodate the battery cell assembly 10.

[0073] In some embodiments, the box assembly 20 can be part of the chassis structure of the vehicle 1000. For example, part of the box assembly 20 can be at least part of the floor of the vehicle 1000, or part of the box assembly 20 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0074] It should be noted that the specific type of heat exchange medium is not limited here, as long as it can have a cooling effect on the battery cell 11, for example, it can be gaseous or liquid. The heat exchange medium in the embodiment of the present disclosure is taken as a cooling liquid as an example for description.

[0075] As an example, the heat exchange assembly 40 further includes an inlet and an outlet, both of which are in communication with the medium flow channel.

[0076] Here, the inlet and the outlet of the heat exchange assembly 40 are used to connect with the pipeline of the air conditioning system or the liquid storage device such as the water tank of the whole vehicle or the electric equipment.

[0077] It should be noted that the specific number of medium flow channels is not limited here. It can be one or more.

[0078] The plurality of the embodiment of the present disclosure means two or more in number.

[0079] The principle of the heat exchange assembly 40 for heat exchange of the battery cell assembly 10 is that the heat exchange medium output by the heat exchange medium source (not shown in the figure) enters the medium flow channel through the inlet of the heat exchange assembly 40, the heat exchange medium exchanges heat with the battery cell assembly 10, and then the heat exchange medium flows out through the outlet of the heat exchange assembly 40, completing the heat exchange of the battery cell assembly 10.

[0080] Here, at least part of the connecting piece 30 being a flexible structure means that part of the connecting piece 30 can be a flexible structure, or all of the connecting piece 30 can be a flexible structure.

[0081] Exemplarily, at least part of the connecting body 31 can be a flexible structure, at least part of the connecting pipe 32 can also be a flexible structure, and at least part of the connecting pipe 32 and at least part of the connecting body 31 can also be flexible structures.

[0082] Here, the heat exchange assembly 40 and the box assembly 20 are flexibly connected through the connecting piece 30, that is, the heat exchange assembly 40 and the box assembly 20 are connected in a manner that can have axial expansion, folding, and a certain displacement amount in the vertical axis.

[0083] Exemplarily, the heat exchange assembly 40 and the connecting piece 30 can be flexibly connected, the box assembly 20 and the connecting piece 30 can also be flexibly connected, and the connecting piece 30 and the box assembly 20 and the heat exchange assembly 40 can also be flexibly connected.

[0084] Here, at least part of the connecting piece 30 being a flexible structure can be a material property of the connecting piece 30. This type of property can be a property of the material due to the light weight of the material, or can be a property of the material due to at least any one of the thickness, rigidity, strength, and elastic modulus of the material. As an example, the material of the connecting piece 30 can be selected to be a material with a lighter weight than a conventional aluminum plate, steel plate, or the like, and the flexibility thereof can be controlled by the thickness, width, length, and type of the material of the connecting piece 30. Of course, it can also be a structural property of the connecting piece 30, for example, by thinning the local structure of the connecting piece 30 to impart the property of the connecting piece 30.

[0085] Here, at least part of the connecting body 31 and the connecting pipe 32 being an integral structure means that the connecting body 31 can be an integral structure with part of the connecting pipe 32, or an integral structure with all of the connecting pipe 32.

[0086] By setting at least part of the connecting body 31 and the connecting pipe 32 as an integral structure, it is beneficial to reduce the number of parts, thereby improving assembly efficiency.

[0087] In related technologies, the battery monomer is heat-exchanged by the heat exchange assembly, the inlet and outlet of the heat exchange assembly are connected through the water cooling pipe, the water cooling pipe is sealed and connected to the external inlet and outlet through the flange and the box, and is connected with the external pipeline. The water cooling pipe needs to absorb the assembly tolerance, and the water cooling pipe generally needs to be pressure-connected with a quick connector, thereby causing a large occupied space, and further causing the problem of an uncompact structure of the battery device.

[0088] The battery device 100 provided by the embodiment of the present application comprises a box assembly 20, a battery monomer assembly 10, a heat exchange assembly 40 and a connecting piece 30. The battery monomer assembly 10 is arranged in the box assembly 20. The box assembly 20 protects the battery monomer assembly 10. The heat exchange assembly 40 is used for heat exchange with the battery monomer assembly 10. The connecting body 31 of the connecting piece 30 can be directly connected with the box assembly 20. The connecting pipe 32 of the connecting piece 30 can be directly connected with the heat exchange assembly 40. The connection between the two does not need to be realized through other components, thereby facilitating the reduction of components, the reduction of cost and occupied space, the improvement of structural compactness of the battery device 100 and the improvement of energy density of the battery device 100. In addition, at least part of the connecting piece 30 is in a flexible structure, so that the heat exchange assembly 40 and the box assembly 20 are flexibly connected through the connecting piece 30. That is, the connection between at least part of the connecting piece 30 and the box assembly 20 is a connection mode that can axially stretch and contract, fold and produce a certain displacement amount in the vertical axial direction. In this way, the assembly tolerance between at least part of the connecting piece 30 and the box assembly 20 and between at least part of the connecting piece 30 and the heat exchange assembly 40 is absorbed, thereby facilitating the improvement of assembly efficiency and connection reliability between the heat exchange assembly 40 and the box assembly 20. In addition, at least part of the connecting body 31 and the connecting pipe 32 is in an integrated structure, thereby further facilitating the improvement of assembly efficiency between the connecting piece 30 and the heat exchange assembly 40 and the box assembly 20.

[0089] In some embodiments, referring to Figures 3 to 6 The connecting pipe 32 comprises a flexible connecting pipe 321 which is flexibly connected with the connecting body 31.

[0090] That is, the connection between the connecting pipe 32 and the connecting body 31 is a connection mode that can axially stretch and contract, fold and produce a certain displacement amount in the vertical axial direction.

[0091] In this embodiment, the flexible connecting pipe 321 and the connecting body 31 are flexibly connected. The connecting body 31 is connected with the box assembly 20. In this way, the assembly tolerance between the flexible connecting pipe 321 and the box assembly 20 is absorbed, thereby facilitating the improvement of assembly efficiency and connection reliability between the flexible connecting pipe 321 and the box assembly 20.

[0092] In some embodiments, the elastic modulus of the flexible connecting pipe 321 is 0.1 MPa-10000 MPa.

[0093] Exemplarily, the elastic modulus of the flexible connecting pipe 321 can be a point value of any one of 0.1 MPa, 1 MPa, 50 MPa, 100 MPa, 150 MPa, 200 MPa, 300 MPa, 500 MPa, 800 MPa, 1000 MPa, 1300 MPa, 1500 MPa, 1800 MPa, 2000 MPa, 2500 MPa, 2800 MPa, 3000 MPa, 3500 MPa, 4000 MPa, 4500 MPa, 5000 MPa, 5500 MPa, 6000 MPa, 6500 MPa, 7000 MPa, 7500 MPa, 8000 MPa, 8500 MPa, 8800 MPa, 9000 MPa, 9500 MPa, 9700 MPa, 10000 MPa or a point value between any two of them.

[0094] The elastic modulus describes the size of the unit strain caused by the unit stress when the solid is stressed within a certain range, and is one of the basic physical quantities of the material. The greater the elastic modulus, the greater the stiffness of the material, and the stronger the compression resistance. The elastic modulus is a physical quantity describing the elasticity of a substance.

[0095] In this embodiment, by setting the elastic modulus of the flexible connecting pipe 321 to 0.1 MPa-10000 MPa, the flexible connecting pipe 321 is made to have a certain structural strength, the reliability of the connecting pipe 32 is improved, and at the same time has a certain deformation ability, so as to be beneficial to absorbing the assembly error between the flexible connecting pipe 321 and the connecting body 31.

[0096] In some embodiments, referring to Figure 6 , the wall thickness of at least part of the flexible connecting pipe 321 is smaller than the wall thickness of the connecting body 31.

[0097] Here, the wall thickness of part of the flexible connecting pipe 321 can be smaller than the wall thickness of the connecting body 31, or the wall thickness of the entire flexible connecting pipe 321 can be smaller than the wall thickness of the connecting body 31.

[0098] That is, by thinning the wall thickness of the flexible connecting pipe 321, the flexible connecting pipe 321 can be deformed, that is, the flexible connecting pipe 321 is made to have a certain flexibility.

[0099] In some embodiments, referring to Figure 5 , the material of the flexible connecting pipe 321 includes rubber.

[0100] The material of the flexible connecting pipe 321 is, for example, a rubber material such as silicone rubber, ethylene propylene diene rubber (EPDM), etc. Of course, it can also be other materials with a certain elastic modulus.

[0101] In some embodiments, referring to Figure 6The connecting pipe 32 is configured to form the flexible connecting pipe 321 and the connecting body 31 by two-color injection molding or secondary injection molding.

[0102] That is, the flexible connecting pipe 321 and the connecting body 31 are in an integrated structure.

[0103] In this way, it is beneficial to reduce the number of components, improve assembly efficiency, and improve the structural strength and reliability of the connecting pipe 32.

[0104] In some embodiments, the difference between the melting points of the flexible connecting pipe 321 and the connecting body 31 is less than or equal to 80°C.

[0105] That is, the melting points of the flexible connecting pipe 321 and the connecting body 31 are relatively close, so that during the integrated injection molding, the injection material of the flexible connecting pipe 321 and the injection material of the connecting body 31 can be well intermingled, thereby improving the molding efficiency and yield of the connecting pipe 32.

[0106] In some embodiments, referring to Figures 5 to 6 The connecting body 31 is connected to the cabinet assembly 20 and / or the flexible connecting pipe 321 through the connecting portion 311.

[0107] Here, the connecting portion 311 is, for example, a flange, which facilitates the connection of the connecting body 31 to the cabinet assembly 20 and / or the flexible connecting pipe 321, thereby improving assembly efficiency and connection reliability.

[0108] The connection between the connecting portion 311 and the cabinet assembly 20 is not limited here, and may, for example, be a fastening connection, a clamping connection, a welding connection, or an adhesive connection.

[0109] In some embodiments, referring to Figures 3 to 6 The connecting piece 30 further comprises a sealing piece 33, which is sealingly clamped between the connecting body 31 and the cabinet assembly 20.

[0110] The specific material of the sealing piece 33 is not limited here, and may, for example, be a rubber piece.

[0111] That is, the sealing piece 33 is used to seal the gap between the connecting body 31 and the cabinet assembly 20, which is beneficial to improve the sealing performance between the connecting body 31 and the cabinet assembly 20.

[0112] For example, the sealing piece 33 can be sealingly clamped between the connecting portion 311 and the cabinet assembly 20, and the provision of the connecting portion 311 is also beneficial to sealingly clamp the sealing piece 33 between the connecting portion 311 and the cabinet assembly 20.

[0113] Exemplarily, the connecting portion 311 is recessed to form a groove, and part of the sealing member 33 is arranged in the groove and part of the sealing member 33 is exposed outside the groove for sealing abutting with the cabinet assembly 20.

[0114] In some embodiments, referring to Figures 5 to 7 , the outer side wall of the flexible connecting pipe 321 is protruded radially outward to form a limiting protrusion 3211, and the connecting body 31 forms a limiting groove 312, the limiting protrusion 3211 extends into the limiting groove 312 for limiting the flexible connecting pipe 321 from being pulled out of the connecting body 31.

[0115] Here, the outer side wall of the flexible connecting pipe 321 can be protruded radially outward to form a limiting protrusion 3211, or the outer side wall of the flexible connecting pipe 321 can be protruded radially outward to form a ring of limiting protrusions 3211.

[0116] Exemplarily, the flexible connecting pipe 321 with the limiting protrusion 3211 can be formed first, and then the formed flexible connecting pipe 321 is taken out and placed in the mold of the connecting body 31, and then the plastic material of the connecting body 31 is injected again to form the connecting body 31 with the limiting groove 312, which is an integrated structure of the flexible connecting pipe 321 and the connecting body 31 formed by two-shot injection molding.

[0117] In this embodiment, the flexible connecting pipe 321 is provided with the limiting protrusion 3211, and the limiting protrusion 3211 extends into the limiting groove 312 of the connecting body 31, which is beneficial to improve the connection reliability of the flexible connecting pipe 321 and the connecting body 31, thereby reducing the possibility of the flexible connecting pipe 321 being pulled out of the connecting body 31.

[0118] In some embodiments, referring to Figures 5 to 6 , the connecting pipe 32 includes a hard connecting pipe 322, the hard connecting pipe 322 is connected with the heat exchange assembly 40, the hard connecting pipe 322 is sleeved on the outer periphery of the flexible connecting pipe 321, or the flexible connecting pipe 321 is sleeved on the outer periphery of the hard connecting pipe 322, or the hard connecting pipe 322 is connected with the flexible connecting pipe 321 at one end in the axial direction.

[0119] Here, the hard connecting pipe 322 is, for example, a water nozzle.

[0120] Here, the flexible connecting pipe 321 and the hard connecting pipe 322 can be an integrated structure or a split structure.

[0121] In the embodiment in which the flexible connecting pipe 321 and the hard connecting pipe 322 are an integrated structure, exemplarily, the connecting pipe 32 is configured to form the flexible connecting pipe 321 and the hard connecting pipe 322 by two-color injection molding or two-shot injection molding.

[0122] Therefore, the number of components is reduced, the assembly efficiency is improved, and the structural strength and reliability of the connecting pipe 32 are improved.

[0123] In the embodiment in which the flexible connecting pipe 321 and the rigid connecting pipe 322 are in a split structure, the specific connection manner of the flexible connecting pipe 321 and the rigid connecting pipe 322 is not limited here, for example, the flexible connecting pipe 321 and the rigid connecting pipe 322 are connected together in a clamping manner, an adhesive manner, or the like.

[0124] The flexible connecting pipe 321 can be flexibly connected with the connecting body 31 and the rigid connecting pipe 322, and can also play a sealing role, thereby improving the connection reliability of the flexible connecting pipe 321, the connecting body 31, and the rigid connecting pipe 322.

[0125] The rigid connecting pipe 322 is sleeved on the outer periphery of the flexible connecting pipe 321, that is, the rigid connecting pipe 322 and the flexible connecting pipe 321 are radially covered. The rigid connecting pipe 322 is used to provide structural strength, and the rigid connecting pipe 322 is sleeved on the outer periphery of the flexible connecting pipe 321. In this way, the rigid connecting pipe 322 can play a certain restraining role on the flexible connecting pipe 321.

[0126] The flexible connecting pipe 321 is sleeved on the outer periphery of the rigid connecting pipe 322, that is, the flexible connecting pipe 321 is covered on the outer side of the rigid connecting pipe 322 in the radial direction.

[0127] The rigid connecting pipe 322 is connected with one end of the flexible connecting pipe 321 in the axial direction, that is, the rigid connecting pipe 322 and the flexible connecting pipe 321 are connected in the axial direction.

[0128] In some embodiments, referring to Figures 5 to 6 , a guide inclined surface 3221 is formed at the end where the rigid connecting pipe 322 and the flexible connecting pipe 321 are connected. In the direction close to the heat exchange assembly 40, the distance between the guide inclined surface 3221 and the central axis of the rigid connecting pipe 322 gradually increases.

[0129] Here, the rigid connecting pipe 322 forms the guide inclined surface 3221, and the guide inclined surface 3221 is used to guide the rigid connecting pipe 322 to extend into the flexible connecting pipe 321, thereby improving the assembly efficiency.

[0130] Exemplarily, the guide inclined surface 3221 is a conical barb.

[0131] In some embodiments, referring to Figures 5 to 6 , the connecting body 31, the flexible connecting pipe 321, and the rigid connecting pipe 322 jointly define a connecting channel 34.

[0132] The medium flow channel is communicated to the outside of the box assembly 20 through the connecting channel 34 jointly defined by the connecting body 31, the flexible connecting pipe 321, and the rigid connecting pipe 322.

[0133] In other embodiments, the flexible connecting pipe 321 and the rigid connecting pipe 322 together define the connecting passage 34.

[0134] In some embodiments, please refer to Figures 5 to 6 The first sub-passage 3212 has a guide passage 3213 formed at one end close to the heat exchange assembly 40. In the direction close to the heat exchange assembly 40, the distance between the side wall of the guide passage 3213 and the central axis of the first sub-passage 3212 gradually increases.

[0135] Here, the first sub-passage 3212 constitutes at least part of the connecting passage 34.

[0136] In the direction close to the heat exchange assembly 40, the distance between the side wall of the guide passage 3213 and the central axis of the first sub-passage 3212 gradually increases, that is, the aperture of the guide passage 3213 gradually increases in the direction close to the heat exchange assembly 40.

[0137] In this embodiment, by setting the distance between the side wall of the guide passage 3213 and the central axis of the first sub-passage 3212 gradually increasing in the direction close to the heat exchange assembly 40, the rigid connecting pipe 322 can be guided to extend into the flexible connecting pipe 321, thereby improving the assembly efficiency. In addition, the setting of the guide passage 3213 is conducive to further absorbing the assembly tolerance, thereby further improving the assembly efficiency and the connection reliability.

[0138] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application is included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The battery device comprises: a box assembly; a battery cell assembly arranged in the box assembly; a heat exchange assembly arranged in the box assembly, the heat exchange assembly has at least one medium flow channel for conducting a heat exchange medium to exchange heat with the battery cell assembly; a connector comprising a connecting body and a connecting pipe, the connecting body is connected to the box assembly, the connecting pipe is connected to the heat exchange assembly, at least part of the connecting body and the connecting pipe are in an integrated structure; at least part of the connector is flexible, so that the heat exchange assembly and the box assembly are connected through the connector, the connector is provided with a connecting channel, and the medium flow channel is connected to the outside of the box assembly through the connecting channel.

2. The battery device according to claim 1, characterized by The connecting pipe comprises a flexible connecting pipe, and the flexible connecting pipe is connected to the connecting body.

3. The battery device of claim 2, wherein, The connecting pipe is configured to form the flexible connecting pipe and the connecting body through double-color injection molding or secondary injection molding.

4. The battery device of claim 3, wherein Part of the outer side wall of the connecting body protrudes radially outward to form a connecting portion, and the connecting body is connected to the box assembly and / or the flexible connecting pipe through the connecting portion.

5. The battery device of claim 3, wherein The outer side wall of the flexible connecting pipe protrudes radially outward to form a limiting protrusion, the connecting body forms a limiting groove, the limiting protrusion extends into the limiting groove, and the limiting protrusion is used to limit the flexible connecting pipe from being pulled out of the connecting body.

6. The battery device of claim 3, wherein The melting point between the flexible connecting pipe and the connecting body is less than or equal to 80 DEG C.

7. The battery device of claim 2, wherein The elastic modulus of the flexible connecting pipe is 0.1 MPa-10000 MPa.

8. The battery device of claim 2, wherein The wall thickness of at least part of the flexible connecting pipe is smaller than that of the connecting body.

9. The battery device of claim 2, wherein, The material of the flexible connecting pipe comprises rubber.

10. The battery device of claim 2, wherein The connector further comprises a sealing member, and the sealing member is clamped between the connecting body and the box assembly.

11. The battery device of claim 2, wherein The connecting pipe comprises a hard connecting pipe, the hard connecting pipe is connected to the heat exchange assembly, the hard connecting pipe is sleeved on the outer periphery of the flexible connecting pipe, or the flexible connecting pipe is sleeved on the outer periphery of the hard connecting pipe, or the hard connecting pipe and the flexible connecting pipe are connected at one end in the axial direction.

12. The battery device of claim 11, wherein, The end of the hard connecting pipe connected to the flexible connecting pipe is provided with a guide inclined surface, and the distance between the guide inclined surface and the central axis of the hard connecting pipe gradually increases in the direction close to the heat exchange assembly.

13. The battery device of claim 11, wherein, The connecting body, the flexible connecting pipe and the hard connecting pipe jointly define the connecting channel.

14. The battery device of claim 11, wherein, The flexible connecting pipe has a first sub-channel, and the end of the first sub-channel close to the heat exchange assembly is provided with a guide channel, and the distance between the side wall of the guide channel and the central axis of the first sub-channel gradually increases in the direction close to the heat exchange assembly.

15. An energy storage device, characterized by, The battery device comprises a plurality of battery devices according to any one of claims 1-14, and the battery devices are used for storing or providing electric energy.

16. An electrical device, comprising: A battery device according to any one of claims 1 to 14 or an energy storage device according to claim 15, the battery device being used to store or provide electrical energy.

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