Battery device and electric appliance

Abstract

The application provides a battery device and an electric equipment, and belongs to the battery field. The battery device comprises a heat exchange assembly, a joint and a protective cover. The heat exchange assembly has a flow channel for a heat exchange medium to flow. The heat exchange assembly is provided with a fluid interface in communication with the flow channel. The joint comprises a joint body and a lug. The joint body is internally provided with a hole channel. The hole channel is in communication with the flow channel through the fluid interface. The lug extends from the outer circumferential surface of the joint body in a direction away from the hole channel. The protective cover comprises a plug-in part and a cover body connected with each other. The plug-in part can be elastically deformed. The plug-in part and the hole channel can be interference fit. The cover body is attached to the lug and blocks the hole channel. Alternatively, the plug-in part and the hole channel can be separated from each other. In the scheme, the attachment relationship between the cover body and the lug has a positioning indication effect. Thus, the problem that the sealing of the joint by the protective cover is not strict due to the improper plugging of the protective cover can be alleviated, so as to improve the sealing reliability of the protective cover to the joint.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and electrical equipment. Background Technology

[0002] Energy conservation and emission reduction are crucial for sustainable social development. Batteries, with their ability to store or release energy as needed, are widely used in various electrical devices and energy storage systems, and are an important component in promoting energy transition and sustainable development. For the new energy industry, battery technology is a critical factor in its development.

[0003] Temperature has a significant impact on battery performance. Batteries are prone to overheating and overcooling during use, which can affect battery performance, lifespan, and even safety. The function of a heat exchanger is to regulate battery temperature in a timely manner, maintaining the battery within its optimal operating temperature range. To prevent foreign objects from entering the heat exchanger via its fluid inlets during transportation, protective covers are often used to seal the joints at these inlets. However, in practical applications, the seal of these protective covers is often incomplete. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the prior art. Therefore, one object of this application is to provide a battery device and electrical equipment to improve the sealing reliability of the protective cover to the connector.

[0005] An embodiment of the first aspect of this application provides a battery device, including: a heat exchange component, a connector, and a protective cover. The heat exchange component has a flow channel for the flow of a heat exchange medium and a fluid interface communicating with the flow channel. The connector includes a connector body and a lug. The connector body has a channel inside, which communicates with the flow channel through the fluid interface. The lug extends from the outer peripheral surface of the connector body in a direction away from the channel. The protective cover includes a connected insertion part and a cover body. The insertion part is elastically deformable and can be interference-fitted with the channel. The cover body is attached to the lug and blocks the channel, or the insertion part can be disengaged from the channel.

[0006] In the technical solution of this application embodiment, by designing the cover and the lug to fit together, when the cover and the lug fit together, it can indicate that the insertion part is inserted in place. That is, the fitting relationship between the cover and the lug can play a role in indicating that the position is in place. This can alleviate the problem of poor sealing of the protective cover to the joint due to improper insertion of the protective cover. At the same time, it can reduce the possibility of foreign objects entering the channel from the gap between the cover and the lug. This is conducive to improving the sealing reliability of the protective cover to the joint and reducing the probability of foreign objects entering the heat exchange component.

[0007] Furthermore, by making the insertion part interference fit with the channel, the protective cover can be stably inserted into the channel, making it less likely for the protective cover to come off the joint due to bumps and collisions during transportation, so as to reliably seal the joint and fluid interface.

[0008] In some embodiments, the insertion portion includes a main body and a plurality of elastic mating portions. The main body extends axially along the channel, and the plurality of elastic mating portions are circumferentially spaced around the main body. Each of the plurality of elastic mating portions is curved and extends from the outer surface of the main body toward the wall of the channel.

[0009] With this technical solution, less material undergoes elastic deformation at the insertion part, making it easier for the insertion part to deform elastically, which helps reduce the difficulty of inserting and removing the protective cover.

[0010] In some embodiments, each elastic mating part is arc-shaped, cycloidal, or involute-shaped. Using this technical solution, the structure of the elastic mating part is simple and easy to manufacture.

[0011] In some embodiments, each elastic mating part has a first arc surface and a second arc surface, and the minimum distance between the first arc surface and the second arc surface is t; the interference between the insertion part and the channel is ▽D; t and ▽D satisfy: 0.42≤▽D / t≤0.615.

[0012] With this technical solution, the elastic deformation capacity and interference of the elastic mating part are moderate, which not only makes the protective cover less likely to be damaged by insertion and removal, but also makes the insertion and removal force moderate.

[0013] In some embodiments, the insertion part includes a first segment and a second segment, which are sequentially connected and coaxially arranged along the axial direction of the channel. The first segment is connected to the cover and has an interference fit with the channel. When the insertion part is disengaged from the channel, the maximum dimension of the outer surface of the insertion part along the radial direction of the channel is the first dimension. Along the axial direction of the channel, the first dimension of the first segment remains unchanged from one end to the other end, and the first dimension of the second segment gradually decreases from the end facing the first segment to the end away from the first segment.

[0014] With this technical solution, the outer surface of the second section has a taper to facilitate self-centering and improve the insertion accuracy of the connector.

[0015] In some embodiments, a chamfer is provided at the connection between the lug and the connector body. This technical solution reduces the likelihood of debris being generated due to scraping between the plug and the connector during insertion into the channel.

[0016] In some embodiments, the protective cover further includes a flange, one end of which is connected to the outer periphery of the cover body. The flange is provided with a locking part, which can engage or disengage with the lug, so that the protective cover can move axially along the channel or restrict the axial movement of the protective cover along the channel.

[0017] With this technical solution, the locking relationship between the locking part and the lug can also serve as an indicator of proper installation, which helps to further alleviate the problem of inadequate sealing of the joint by the protective cover due to improper insertion of the protective cover.

[0018] In some embodiments, the locking portion includes a flange and an elastic protrusion. One end of the flange is connected to a flange and extends in a direction away from the cover. The elastic protrusion is disposed on the inner surface of the flange and abuts or disengages from the surface of the cover away from the lug.

[0019] In some embodiments, the flange is connected with a plurality of locking portions spaced circumferentially along the channel. With this technical solution, the elastic protrusion does not extend continuously along the entire circumference of the channel, which helps to reduce the difficulty of inserting and removing the protective cover.

[0020] In some embodiments, the flange is annular and surrounds the outer periphery of the lug; when the lug is in contact with the cover, the inner surface of the flange is in contact with the peripheral side surface of the lug.

[0021] In some embodiments, the interference fit between the plug and the channel is ▽D, and the maximum radial dimension of the outer surface of the plug in the disengaged state along the channel is D0. ▽D and D0 satisfy: 0.048≤▽D / D0≤0.0625. This embodiment achieves a good balance between the sealing reliability of the protective cover to the fluid interface and the difficulty of inserting and removing the protective cover.

[0022] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0024] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0025] Figure 1This is a schematic diagram of the vehicle structure according to some embodiments of this application; Figure 2 This is an exploded view of the battery device according to some embodiments of this application; Figure 3 This is a partial schematic diagram of the battery device in some embodiments of this application, showing the connection between the protective cover and the connector; Figure 4 This is a partial schematic diagram of the battery device according to some embodiments of this application, showing the protective cover and connector detached from the plug; Figure 5 This is a schematic diagram of the structure of the protective cover according to some embodiments of this application; Figure 6 for Figure 5 The front view of the protective cover is shown; Figure 7 for Figure 5 The protective cover shown is a bottom view.

[0026] Explanation of reference numerals in the attached figures: 1000 vehicles; Battery unit 100, controller 200, motor 300; Battery cell module 10, battery cell 11; Battery box 20, box cover 21, box body 22, heat exchange assembly 221; Connector 30, connector body 31, lug 32; Protective cover 40, insertion part 41, main body part 411, elastic fitting part 412, first section 413, second section 414, cover body 42, pull-out part 43, flange 44, locking part 45. Detailed Implementation

[0027] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0028] Unless otherwise defined, 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0029] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0030] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0031] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0032] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0033] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation", "connection", "linking", and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components.

[0034] In this application, the term "parallel" includes not only absolute parallelism but also approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only absolute perpendicularity but also approximate perpendicularity as commonly understood in engineering. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0035] The "range" disclosed in this application is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60-120 and 80-110 are listed for a specific parameter, it is expected that ranges of 60-110 and 80-120 are also included. Furthermore, if minimum range values ​​of 1 and 2 are listed, and if maximum range values ​​of 3, 4, and 5 are listed, then the following ranges are all expected: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5. In this application, unless otherwise stated, the numerical range "ab" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0-5" indicates that all real numbers between "0-5" have been listed in this article; "0-5" is simply a shortened representation of these numerical combinations. Furthermore, when a parameter is stated as an integer ≥2, it is equivalent to disclosing that the parameter is, for example, an integer such as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0036] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0037] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0038] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0039] Generally, heat exchange components have a connector at the fluid interface. During battery transport, a protective cap must first be inserted into the connector to seal it and prevent foreign objects from entering the heat exchange component through the fluid interface. After the battery device arrives at the installation site, the protective cap is removed from the connector, and then the connector is connected to the heat exchange system piping, allowing the heat exchange system piping to deliver the heat exchange medium to the heat exchange component. However, in practical applications, the protective cap may not be properly inserted, resulting in an incomplete seal and failing to effectively prevent foreign objects from entering the connector and fluid interface.

[0040] Based on the above considerations, a battery device is designed, in which the protective cover includes a connected plug and a cover body, the plug can be elastically deformable, the plug and the connector can be interference-fitted, the cover and the connector's lugs can be attached to and block the connector, or the plug and the connector can be disengaged from the connector.

[0041] In such a battery device, the fit between the cover and the lug can serve as an indication of proper positioning. This can alleviate the problem of inadequate sealing between the protective cover and the connector due to improper insertion of the protective cover, thereby improving the sealing reliability of the protective cover to the connector.

[0042] The battery devices described in this application can be used, but are not limited to, in electrical equipment or energy storage devices such as vehicles, ships, or aircraft. A power system incorporating the battery devices described in this application can be used to construct such electrical equipment or energy storage devices.

[0043] The energy storage device utilizing a battery as a power system in this application embodiment can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output it at appropriate times. For example, the energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage device provided in this application embodiment can be used in any power system that requires energy storage.

[0044] In some embodiments, the energy storage device is an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0045] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet. Each battery cluster may include multiple battery units connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, these clusters are connected in parallel to increase the capacity of the energy storage device.

[0046] In this application embodiment, the electrical devices using battery devices as power sources can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0047] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housings and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0048] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0049] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0050] Figure 2 A schematic diagram of the structure of a battery device 100 according to an embodiment of this application is shown. Figure 2 As shown, the battery device 100 provided in the embodiments of this application may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include multiple battery cells 11, which are connected in series, parallel, or mixed connection via a busbar.

[0051] In some embodiments, the battery cell assembly 10 is typically formed by arranging a plurality of battery cells 11.

[0052] As an example, the battery cell assembly 10 can be a battery module, which is formed by arranging and fixing multiple battery cells 11 together to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells 11 together with cable ties.

[0053] In some embodiments, such as Figure 2 As shown, the battery device 100 can be a battery pack, which includes a battery case 20 and one or more individual battery cells 10, with the individual battery cells 10 housed within the battery case 20. The battery case 20 can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of combinations of simple cuboids, cylinders, or spheres. The battery case 20 can be made of alloy materials such as aluminum alloy or iron alloy, polymer materials such as polycarbonate or polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin.

[0054] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be housed in the battery box 20 by fixing the battery module in the battery box 20.

[0055] As an example, the battery cell assembly 10 can also be housed in the battery box 20 by directly fixing multiple battery cells 11 to the battery box 20.

[0056] As an example, the battery box 20 may include a cover 21 and a body 22. The cover 21 and the body 22 are fastened together to form a closed space inside the battery box 20 to house the battery cell assembly 10. Here, "closed" refers to covering or closing, and can be either non-sealed or sealed to prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells 11. The cover 21 may be a top cover or a bottom plate.

[0057] As an example, the battery box 20 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the battery box 20 forms an enclosed space to accommodate the battery cell assembly 10.

[0058] In some embodiments, the battery box 20 may be part of the vehicle's chassis structure. For example, a portion of the battery box 20 may be at least a part of the vehicle's floor, or a portion of the battery box 20 may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0059] The battery cell 11 mentioned in the embodiments of this application can be a secondary battery. A secondary battery refers to a battery cell 11 that can be recharged to activate the active material and continue to be used after it has been discharged.

[0060] The battery cell 11 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this. As an example, the battery cell 11 can be a cylindrical battery cell, a prismatic battery cell, or a battery cell 11 of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells, etc., and this application has no particular limitation.

[0061] Please see Figures 3 to 7 The battery device 100 also includes a heat exchange assembly 221, a connector 30, and a protective cover 40. The heat exchange assembly 221 has a flow channel for the flow of heat exchange medium and a fluid interface communicating with the flow channel. The connector 30 includes a connector body 31 and a lug 32. The connector body 31 has a channel inside, which communicates with the flow channel through the fluid interface. The lug 32 extends from the outer peripheral surface of the connector body 31 in a direction away from the channel. The protective cover 40 includes a connected insertion portion 41 and a cover body 42. The insertion portion 41 is elastically deformable and can be interference-fitted with the channel. The cover body 42 fits against the lug 32 and seals the channel, or the insertion portion 41 can be disengaged from the channel.

[0062] The heat exchange assembly 221 is used to regulate the temperature of the battery cells. In some embodiments, the heat exchange assembly 221 may be disposed inside the housing 22 and located between the bottom plate of the housing 22 and the battery cells. In some embodiments, as an example, the heat exchange assembly 221 may be fixedly connected to the frame and close one side opening of the frame, that is, the heat exchange assembly 221, the frame and the top cover are connected to form the housing 22.

[0063] The heat exchange assembly 221 may be provided with multiple fluid interfaces, including inlet and outlet. That is, at least one fluid interface is used as an inlet for the heat exchange medium to flow into the flow channel, and at least one fluid interface is used as an outlet for the heat exchange medium to flow out of the flow channel.

[0064] The number of connectors 30 and protective covers 40 are consistent with the number of fluid interfaces, with each fluid interface corresponding to one connector 30 and one protective cover 40. Specifically, the connector 30 corresponding to the inlet is used to guide the heat exchange medium into the flow channel, and the connector 30 corresponding to the outlet is used to guide the heat exchange medium from the flow channel into the heat exchange system piping.

[0065] As an example, the connector body 31 may include a coaxially arranged connecting pipe section and an extension section. The connecting pipe section connects the lug 32 and the extension section. The outer peripheral surface of the connecting pipe section and the outer peripheral surface of the extension section are connected by a stepped surface. The stepped surface abuts against the surface of the heat exchange component 221. The extension section is inserted into the fluid interface, allowing the channel to communicate with the flow channel through the fluid interface. Taking the cross-section perpendicular to the axial direction of the channel as the cross-section, the cross-sectional shape of the channel can be circular, rectangular, elliptical, etc., and this embodiment does not impose specific limitations on this. The lug 32 is arranged around the outer periphery of the connector body 31, and the lug 32 can protrude in a direction perpendicular to the axial direction of the channel. The lug 32 and the connector body 31 can be integrally formed, for example, by injection molding, casting, etc., to form the connector 30. Alternatively, the lug 32 and the connector body 31 can also be manufactured separately, that is, the lug 32 and the connector body 31 are independent components, and the lug 32 and the connector body 31 are connected by welding, screwing, snap-fitting, etc.

[0066] The first dimension is the maximum radial dimension of the outer surface of the insertion part 41 when it is disengaged (i.e., not inserted into the channel). An interference fit is a mechanical connection method where, before the insertion part 41 is inserted into the channel, the first dimension is greater than the radial dimension of the channel itself. For example, if the channel has a circular cross-section, and the cross-section perpendicular to the channel's axis is taken as the cross-section, and the insertion part 41 also has a circular cross-section, then the first dimension (i.e., the diameter of the insertion part 41) is greater than the channel's diameter d. The elastic deformability of the insertion part 41 means that during insertion into the channel, the insertion part 41 can deform under the pressure of the connector body 31, causing changes in both the cross-sectional area and the first dimension of the insertion part 41. The insertion part 41 and the cover 42 can be integrally formed, or they can be manufactured separately and then assembled together.

[0067] In this embodiment, the insertion part 41 of the protective cover 40 is first inserted into the channel. During this process, the insertion part 41 elastically deforms until the cover body 42 and the lug 32 fit together, and the cover body 42 seals the channel. Then, the battery device 100 is transported. After the battery device 100 is transported to the installation site, a pulling force is applied to the protective cover 40 to disengage the insertion part 41 from the channel. Then, the connector 30 is connected to the heat exchange system pipeline.

[0068] In the technical solution of this embodiment, by designing the cover 42 to fit with the lug 32, when the cover 42 and the lug 32 fit together, it can be indicated that the insertion part 41 is inserted in place. That is, the fitting relationship between the cover 42 and the lug 32 can serve as an indication of proper insertion. This can alleviate the problem of poor sealing of the protective cover 40 to the joint 30 due to improper insertion of the protective cover 40. At the same time, it can reduce the possibility of foreign objects entering the channel through the gap between the cover 42 and the lug 32. This helps to improve the sealing reliability of the protective cover 40 to the joint 30 and reduces the probability of foreign objects entering the heat exchange component 221.

[0069] Furthermore, by interfering with the insertion part 41 and the channel, the protective cover 40 can be stably inserted into the channel, making it less likely for the protective cover 40 to detach from the connector 30 due to bumps or collisions during transportation, so as to reliably seal the connector 30 and the fluid interface.

[0070] The structure of the insertion part 41 is varied, and this embodiment does not impose a specific limitation on it. In some embodiments, the insertion part 41 can be a shaft-shaped member, which is inserted into the channel with an interference fit.

[0071] Please refer to some embodiments of this application. Figures 5 to 7 The insertion part 41 may include a main body part 411 and a plurality of elastic mating parts 412. Figure 7 Specifically, there are four elastic fitting parts 412. The main body 411 extends along the axial direction of the channel. The multiple elastic fitting parts 412 are arranged circumferentially around the main body 411. Each of the multiple elastic fitting parts 412 is arranged in a curve and extends from the outer surface of the main body 411 to the wall of the channel.

[0072] The main body 411 provides support for the elastic fitting part 412 and gives the insertion part 41 a certain structural strength. The main body 411 can be a solid columnar structure or a hollow columnar structure. The elastic fitting part 412 is curved, specifically, it can be a regular curve or an irregular curve. One end of the elastic fitting part 412 is connected to the main body 411, and the other end is a free end. The free end can be spaced a certain distance from the outer surface of the main body 411, and the elastic fitting part 412 can undergo elastic deformation relative to the main body 411. The number of elastic fitting parts 412 can also be 2, 3, 5 or more.

[0073] During the process of inserting the plug portion 41 of the protective cover 40 into the channel, each elastic mating portion 412 is squeezed, and the free end of the elastic mating portion 412 moves closer to the main body portion 411. The distance between the free end and the outer surface of the main body portion 411 decreases, and each elastic mating portion 412 deforms to squeeze into the channel. The elastic mating portion 412 contacts the inner surface of the connector body 31, and then the plug portion 41 continues to be inserted into the channel until the cover 42 fits against the lug 32 and the cover 42 blocks the channel.

[0074] In this embodiment, the insertion part 41 includes a main body 411 and multiple elastic mating parts 412. During the insertion of the insertion part 41 into the channel, the main body 411 does not need to deform; only the elastic mating parts 412 need to deform to change the cross-sectional area of ​​the insertion part 41 to achieve an interference fit. Therefore, the amount of material undergoing elastic deformation in the insertion part 41 is relatively small, and the insertion part 41 is relatively easier to elastically deform, which helps to reduce the difficulty of inserting and removing the protective cover 40.

[0075] According to some embodiments of this application, each elastic mating part 412 can be constructed as an arc shape, a cycloid shape, or an involute shape. Using this technical solution, the structure of the elastic mating part 412 is simple and easy to manufacture.

[0076] As an example, such as Figure 7 As shown, each elastic fitting part 412 is arc-shaped, and the line connecting the first end and the free end of each elastic fitting part 412 (see reference) Figure 7 The L-shaped parts are all inclined to the axis of the channel, and the first end to the free end of each elastic fitting part 412 faces the wall of the channel. Figure 7 It bends and extends counterclockwise. That is, along... Figure 7 In the counterclockwise direction, the first end of each elastic fitting part 412 is located in front of the free end.

[0077] According to some embodiments of this application, each elastic mating part 412 further has a first arc surface and a second arc surface, and the minimum distance between the first arc surface and the second arc surface is t. The interference between the insertion part 41 and the channel is ▽D. Wherein, t and ▽D can be designed to satisfy: 0.42≤▽D / t≤0.615.

[0078] As an example, such as Figure 7 As shown, each elastic fitting part 412 is arc-shaped, and the center of the first arc surface and the center of the second arc surface can coincide. t can be understood as the thickness of the arc-shaped elastic fitting part 412.

[0079] Interference can be understood as the difference between the first dimension and the dimension of the channel along its own radial direction. As an example, in a technical solution where the insertion part 41 is a shaft-shaped member, i.e., the cross-section of both the insertion part 41 and the cross-section of the channel are circular, the interference is the difference between the diameter of the insertion part 41 and the diameter d of the channel. As an example, in a technical solution where the insertion part 41 includes a main body 411 and multiple arc-shaped elastic fitting parts 412, all elastic fitting parts 412 are connected to a circumscribed circle (see reference...). Figure 7 If the circumcircle C is circumcircle C, then the first dimension is the diameter D0 of the circumcircle C, and ▽D = (D0 – d) / 2.

[0080] ▽D / t can be understood as the ratio of the elastic deformation of the insertion portion 41 along the radial direction of the channel to the thickness of the elastic mating portion 412. ▽D / t can be a range of 0.42, 0.45, 0.48, 0.5, 0.52, 0.55, 0.58, 0.6, 0.615, or any combination thereof. In a specific embodiment, when the diameter of the channel is 12 mm, the interference amount ▽D can range from 0.6 mm to 0.8 mm, and t can range from 1.3 mm to 1.4 mm.

[0081] This embodiment controls the ratio of ▽D to t within the range of 0.42 to 0.615. On the one hand, this ensures that the thickness of the elastic mating part 412 is not too large, its elastic deformation capacity is not too low, and ▽D is not too small. This facilitates a reliable connection between the insertion part 41 and the channel, helping the protective cover 40 to stably and reliably seal the connector 30 and the channel. On the other hand, by ensuring that the thickness of the elastic mating part 412 is not too small, its elastic deformation capacity is not too high, and ▽D is not too large, the insertion and extraction force is positively correlated with the interference fit. This helps to keep the insertion and extraction force within a suitable range (e.g., 25N ± 5N), which reduces the difficulty of inserting and removing the protective cover 40 and reduces the possibility of the insertion part 41 being damaged by compression due to insufficient structural strength. In summary, this embodiment achieves a moderate elastic deformation capacity and interference fit for the elastic mating part 412, thus preventing damage to the protective cover 40 during insertion and extraction and ensuring a moderate insertion and extraction force.

[0082] Please refer to some embodiments of this application. Figure 6 The insertion part 41 may specifically include a first segment 413 and a second segment 414. The first segment 413 and the second segment 414 are sequentially connected and coaxially arranged along the axial direction of the channel. The first segment 413 is connected to the cover 42 and has an interference fit with the channel. When the insertion part 41 is disengaged from the channel, the maximum dimension of the outer surface of the insertion part 41 along the radial direction of the channel is the first dimension. Along the axial direction of the channel, the first dimension of the first segment 413 remains unchanged from one end to the other, and the first dimension of the second segment 414 changes from the end facing the first segment 413 (…). Figure 6 From the middle (upper end) to the other end that deviates from the first segment 413 ( Figure 6 (From the middle to the lower end) gradually decreases.

[0083] As an example, in a technical solution where the insertion part 41 is a shaft-shaped member, the first segment 413 is a cylindrical segment, and the second segment 414 is a frustum-shaped segment. The end of the second segment 414 facing the first segment 413 is the larger diameter end, and the other end is the smaller diameter end; that is, the diameter of the end of the second segment 414 facing the first segment 413 is greater than the diameter of the end of the second segment 414 away from the first segment 413. As an example, in a technical solution where the insertion part 41 includes a main body 411 and multiple arc-shaped elastic fitting parts 412, the projection of the first segment 413 in the main viewing direction is generally rectangular, and the projection of the second segment 414 in the main viewing direction is generally frustum-shaped.

[0084] In this embodiment, during installation, the second segment 414 of the protective cover 40 first extends into the channel, and there is a gap between the second segment 414 and the wall of the channel, meaning that the second segment 414 does not need to contact the inner circumferential surface of the connector body 31, thus the second segment 414 is not squeezed by the connector body 31. Then, the insertion part 41 continues to be inserted into the channel until the outer surface of the first segment 413 contacts the connector body 31, at which point the first segment 413 is squeezed and deformed to be inserted into the channel.

[0085] Using this technical solution, when the protective cover 40 is initially inserted into the connector body 31, even if there is a radial deviation between the centerline of the insertion part 41 and the axis of the channel, as the insertion part 41 continues to be inserted into the channel, the outer surface of the second segment 414 can act as a guide to guide the centerline of the main body 411 to continuously move closer to the axis of the channel until the outer surface of the insertion part 41 mates with the inner wall of the channel. In other words, this embodiment makes the outer surface of the second segment 414 tapered to facilitate a self-centering effect and improve the insertion accuracy of the insertion part 41.

[0086] According to some embodiments of this application, a chamfer is provided at the connection between the lug 32 and the connector body 31. The chamfer structure can be a rounded chamfer, a right-angle chamfer, or a composite chamfer, wherein the composite chamfer can be a chamfer combining a circular arc and a straight line. Taking a right-angle chamfer as an example, the chamfer angle can be in the range of 15°~75°, for example, it can be 15°, 30°, 45°, 60°, 75° or any combination thereof. In the technical solution where the chamfer structure is a right-angle chamfer, the surface of the lug 32 facing the cover 42 is connected to the inner circumferential surface of the connector body 31 by a bevel, and the end of the insertion part 41 facing the cover 42 ( Figure 6 From the upper end of the middle connector 41 to the other end ( Figure 6 The lower end of the insertion part 41 is in the middle, and the inclined surface extends in a direction that gradually approaches the center line of the channel.

[0087] Understandably, in the technical solution where the surface of the lug 32 facing the cover 42 is perpendicularly connected to the inner circumferential surface of the connector body 31, the connection between the lug 32 and the connector body 31 forms a sharp edge. When the protective cover 40 is inserted into the channel, the insertion part 41 is prone to scraping against the sharp edge and generating debris. The debris scratches the inner circumferential surface of the connector body 31, thereby affecting the sealing performance of the connection between the connector 30 and the heat exchange system pipeline.

[0088] In the technical solution of this embodiment, the chamfer provides a smooth transition area to replace the sharp edges, which reduces the probability of the insertion part 41 scraping against the connector 30 and generating debris during the insertion process, so as to ensure the sealing of the connection between the connector 30 and the heat exchange system pipeline.

[0089] According to some embodiments of this application, please refer to Figures 3 to 6The protective cover 40 may also include a flange 44, one end of which is connected to the outer periphery of the cover body 42. The flange 44 is provided with a locking part 45, which can engage or disengage with the lug 32, so that the protective cover 40 can move axially along the channel or restrict the protective cover 40 from moving axially along the channel.

[0090] One end of the flange 44 can be connected to a portion of the outer periphery of the cover 42, that is, a portion of the outer periphery of the cover 42 protrudes and folds to form the flange 44. Alternatively, one end of the flange 44 can be connected to the entire outer periphery of the cover 42, that is, the entire outer periphery of the cover 42 folds to form the flange 44. The flange 44 can extend protrudingly along the axial direction of the channel, or, from one end connected to the cover 42 to the other end, the extension direction of the flange 44 is inclined to the axial direction of the channel.

[0091] When the locking part 45 is engaged with the lug 32, the axial movement of the protective cover 40 along the channel is restricted. When the locking part 45 is disengaged from the lug 32, the protective cover 40 can move axially along the channel.

[0092] In this embodiment, the insertion part 41 is inserted into the channel, and the cover 42 and the lug 32 are fitted together, while the locking part 45 is engaged with the lug 32. After the battery device 100 is transported to the installation site, a pulling force is applied to the protective cover 40 to disengage the locking part 45 from the lug 32. The pulling force is then applied to the protective cover 40 to remove the insertion part 41 from the channel.

[0093] This technical solution serves two purposes. First, the locking relationship between the locking part 45 and the lug 32 can also indicate that the installation is in place, which helps to further alleviate the problem of inadequate sealing between the protective cover 40 and the connector 30 due to improper insertion of the protective cover 40. Second, this improves the connection reliability between the protective cover 40 and the connector 30, thereby enhancing the insertion stability of the protective cover 40 in the channel. This makes it less likely for the protective cover 40 to detach from the connector 30 due to bumps or collisions during transportation, thus reliably sealing the connector 30 and the fluid interface.

[0094] This embodiment does not specifically limit the specific implementation of the locking part 45 and the lug 32. For example, the locking part 45 is an elastic protrusion, and the lug 32 is provided with a groove that engages with the elastic protrusion. By applying a pulling force to the protective cover 40, the elastic protrusion is elastically deformed so that it can be disengaged from the groove, thus achieving disengagement.

[0095] According to some embodiments of this application, the locking portion 45 may include a flange and an elastic protrusion. One end of the flange is connected to the flange 44 and extends in a direction away from the cover body 42. The elastic protrusion is disposed on the inner surface of the flange and abuts or disengages from the lug 32 on the surface away from the cover body 42.

[0096] In this embodiment, the insertion part 41 is first inserted into the channel. As the insertion depth of the insertion part 41 increases, the elastic protrusion gradually approaches the lug 32 until the elastic protrusion contacts the lug 32. Then, the insertion part 41 is continued to be inserted into the channel. During this process, the elastic protrusion is deformed by the pressure of the lug 32. Until the elastic protrusion moves to the side of the lug 32 facing the connecting pipe section, the elastic protrusion is no longer compressed by the lug 32 and returns to its original shape. The elastic protrusion abuts against the surface of the lug 32 away from the cover 42, at which point the cover 42 and the lug 32 are in contact.

[0097] Compared with the technical solution where the lug 32 has a slot that engages with the elastic protrusion, this embodiment makes the elastic protrusion stop or disengage from the surface of the cover 42 away from the lug 32. In this way, the locking part 45 and the lug 32 can be engaged without opening a slot on the lug 32.

[0098] In some examples, the elastic protrusion can be a ring structure that extends continuously along the circumference of the channel, that is, the elastic protrusion and the lug 32 stop around the entire circumference.

[0099] In other examples, the flange 44 is connected to a plurality of locking portions 45 spaced circumferentially along the channel. Figure 6 There are two locking portions 45 in the middle. Of course, in other embodiments, the number of locking portions 45 may be three, four or more. Compared with the technical solution where the elastic protrusion is a ring structure that extends continuously along the circumference of the channel, the elastic protrusion in this embodiment does not extend continuously along the entire circumference of the channel, which helps to reduce the difficulty of inserting and removing the protective cover 40.

[0100] In some embodiments, the connection between the surface of the lug 32 facing the cover 42 and the peripheral side surface of the lug 32 is also chamfered. This prevents sharp edges from forming at the connection between the surface of the lug 32 facing the cover 42 and the peripheral side surface of the lug 32, thereby reducing the probability of wear caused by the elastic protrusion rubbing against the connector 30, and allowing the locking part 45 to effectively engage with the lug 32.

[0101] According to some embodiments of this application, the flange 44 is annular and surrounds the outer periphery of the lug 32. When the lug 32 is fitted with the cover 42, the inner surface of the flange 44 is in contact with the peripheral side surface of the lug 32. In this embodiment, the entire outer periphery of the cover 42 is folded to form the flange 44. The shape and size of the flange 44 are adapted to the lug 32. By adopting this technical solution, thanks to the fact that the flange 44 is in contact with the peripheral side surface of the lug 32, it is difficult for foreign objects from the external environment to enter between the flange 44 and the lug 32, thus further reducing the probability of foreign objects entering between the cover 42 and the lug 32, thereby further reducing the possibility of foreign objects entering the channel.

[0102] According to some embodiments of this application, the interference between the plug portion 41 and the channel is ▽D, and the maximum dimension of the outer surface of the plug portion 41 in the disengaged state along the radial direction of the channel is D0. ▽D and D0 satisfy: 0.048≤▽D / D0≤0.0625.

[0103] ▽D / D0 can be understood as the percentage of the elastic deformation of the insertion part 41 along the radial direction of the channel to its maximum size. ▽D / D0 can be a range consisting of 0.048, 0.05, 0.052, 0.054, 0.056, 0.058, 0.06, 0.0625, or any two of these values.

[0104] This embodiment controls the ratio of ▽D to D0 within the range of 0.048 to 0.0625. On the one hand, this prevents ▽D / D0 from being too small, ensuring a reliable connection between the insertion part 41 and the channel, and helping the protective cover 40 to reliably seal the connector 30 and the channel. On the other hand, it prevents ▽D / D0 from being too large, ensuring that ▽D is not too large, as the insertion and extraction force is positively correlated with the interference fit, thus keeping the insertion and extraction force within an appropriate range and reducing the difficulty of inserting and removing the protective cover 40. In summary, this embodiment achieves a good balance between the sealing reliability of the protective cover 40 to the fluid interface and the difficulty of inserting and removing the protective cover 40.

[0105] In some embodiments, the protective cover 40 may further include a pull-out portion 43, which is located on the side of the cover 42 opposite to the insertion portion 41 and connected to the cover 42. The pull-out portion 43 can be gripped by an operator to facilitate the application of insertion and extraction force to the protective cover 40.

[0106] An embodiment of the second aspect of this application provides an electrical device including the battery device 100 in the above embodiments, the battery device 100 being used to provide electrical energy.

[0107] The electrical equipment includes vehicles (such as vehicles, electric vehicles, ships, spacecraft, etc.), display devices (such as mobile phones, tablets, laptops, etc.), electric toys, power tools, etc. It is understood that the electrical equipment provided in this application, because it uses any of the above-mentioned battery devices 100, has all the beneficial effects of the battery devices 100, which will not be elaborated here.

[0108] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0109] A specific embodiment of this application is described below. It should be understood that this specific embodiment is described for illustrative purposes only and should not be construed as limiting the scope of this application.

[0110] Please see Figures 3 to 7 The battery device 100 includes a heat exchange assembly 221, a connector 30, and a protective cover 40. The heat exchange assembly 221 has a flow channel for the flow of the heat exchange medium and a fluid interface communicating with the flow channel. The connector 30 includes a connector body 31 and a lug 32. The connector body 31 has an internal channel that communicates with the flow channel through the fluid interface. The lug 32 extends from the outer peripheral surface of the connector body 31 away from the channel. Taking a section perpendicular to the axial direction of the channel as the cross-section, the cross-sectional shape of the channel can be circular, and the diameter of the channel is d. The connector body 31 includes a coaxially arranged connecting section and an extension section. The connecting section connects the lug 32 and the extension section. The outer peripheral surface of the connecting section is connected to the outer peripheral surface of the extension section through a stepped surface. The stepped surface abuts against the surface of the heat exchange assembly 221. The extension section is inserted into the fluid interface, allowing the channel to communicate with the flow channel through the fluid interface.

[0111] The protective cover 40 includes a pull-out portion 43, a cover body 42, an insertion portion 41, and a flange 44 connected sequentially along the axial direction of the channel. One end of the flange 44 is connected to the outer periphery of the cover body 42, and a locking portion 45 is provided on the flange 44. The insertion portion 41 includes a main body 411 and four elastic fitting portions 412. The main body 411 extends along the axial direction of the channel, and the elastic fitting portions 412 are arc-shaped, extending from the outer surface of the main body 411 towards the wall of the channel. The elastic fitting portions 412 can elastically deform relative to the main body 411, allowing the insertion portion 41 to be either interference-fitted with or disengaged from the channel. When the insertion portion 41 is interference-fitted with the channel, the cover body 42 and the lug 32 are in contact and block the channel. Simultaneously, the flange 44 surrounds the outer periphery of the lug 32 and is in contact with the peripheral side of the lug 32, and the locking portions 45 abut against the lug 32 away from the surface of the cover body 42. The locking part 45 and the lug 32 can disengage from the surface of the cover 42.

[0112] It is understood that when the insertion part 41 disengages from the channel, the maximum dimension of the outer surface of the insertion part 41 along the radial direction of the channel is the first dimension D0, where D0 > d, and the interference amount ▽D between D0 and the insertion part 41 and the channel satisfies: 0.048 ≤ ▽D / D0 ≤ 0.0625. The thickness t of D0 and the elastic fit part 412 satisfies: 0.42 ≤ ▽D / t ≤ 0.615.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A heat exchange assembly having a flow channel for the flow of a heat exchange medium, the heat exchange assembly being provided with a fluid interface communicating with the flow channel; A connector includes a connector body and a lug. The connector body has a channel inside, which communicates with the flow channel through the fluid interface. The lug extends from the outer peripheral surface of the connector body in a direction away from the channel. A protective cover includes a connected insertion part and a cover body. The insertion part is elastically deformable and can be interference-fitted with the channel. The cover body is attached to and seals the channel with the lug, or the insertion part can be disengaged from the channel.

2. The battery device according to claim 1, characterized in that, The insertion part includes a main body and a plurality of elastic fitting parts. The main body extends along the axial direction of the channel, and the plurality of elastic fitting parts are circumferentially spaced around the main body. Each of the plurality of elastic fitting parts is curved and extends from the outer surface of the main body towards the wall of the channel.

3. The battery device according to claim 2, characterized in that, Each of the elastic mating parts is arc-shaped, cycloid-shaped, or involute-shaped.

4. The battery device according to claim 2, characterized in that, Each elastic mating part has a first arc surface and a second arc surface, and the minimum distance between the first arc surface and the second arc surface is t; the interference between the insertion part and the channel is ▽D; t and ▽D satisfy: 0.42≤▽D / t≤0.

615.

5. The battery device according to claim 2, characterized in that, The insertion part includes a first section and a second section, the first section and the second section are connected sequentially along the axial direction of the channel and are coaxially arranged, the first section is connected to the cover and is interference-fitted with the channel; When the plug part is disengaged from the channel, the maximum radial dimension of the outer surface of the plug part along the channel is the first dimension. Along the axial direction of the channel, the first dimension of the first segment remains unchanged from one end to the other, and the first dimension of the second segment gradually decreases from the end facing the first segment to the end away from the first segment.

6. The battery device according to any one of claims 1 to 5, characterized in that, The lug is chamfered at the connection point with the connector body.

7. The battery device according to any one of claims 1 to 5, characterized in that, The protective cover also includes a flange, one end of which is connected to the outer periphery of the cover body. The flange is provided with a locking part, which can engage or disengage with the lug, so that the protective cover can move axially along the channel or restrict the protective cover from moving axially along the channel.

8. The battery device according to claim 7, characterized in that, The locking part includes a flange and an elastic protrusion. One end of the flange is connected to the flange and extends away from the cover. The elastic protrusion is disposed on the inner surface of the flange. The elastic protrusion abuts against or disengages from the lug on the surface away from the cover. And / or, the flange is connected to a plurality of locking portions spaced circumferentially along the channel.

9. The battery device according to claim 7, characterized in that, The flange is annular and surrounds the outer periphery of the lug; when the lug is in contact with the cover, the inner surface of the flange is in contact with the peripheral side surface of the lug.

10. The battery device according to any one of claims 1 to 5, characterized in that, The interference between the insertion part and the channel is ▽D, and the maximum radial dimension of the outer surface of the insertion part in the disengaged state along the channel is D0. ▽D and D0 satisfy: 0.048≤▽D / D0≤0.0625.

11. An electrical appliance, characterized in that, The electrical equipment includes a battery device as described in any one of claims 1 to 10, the battery device being used to provide electrical energy.

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