Battery device and electric device

Abstract

The utility model provides a battery device and an electric device. The battery device comprises a box body, a battery monomer and a heat management assembly, the box body comprises a bottom plate and a side plate, the bottom plate and the side plate are connected to form a cavity for accommodating the battery monomer, the heat management assembly comprises a heat exchange main body and a connector piece, the heat exchange main body is used for accommodating a heat exchange medium, and the heat exchange main body is accommodated in the cavity to be in heat conduction connection with the battery monomer; the connector piece comprises a pipe body part and a connecting part, part of the pipe body part extends out of the cavity through a mounting hole in the side plate, the heat exchange body communicates with the external environment through the pipe body part so as to achieve circulation of a heat exchange medium with the external environment, the connecting part is arranged on the outer surface of the pipe body part, and the connector piece is reliably fixed to the box body in the mode that the connecting part is bonded to the side plate. The insert nut does not need to be arranged on the box body, so that the risk that the insert nut is easy to interfere with a mold in the box body demolding process due to the fact that the insert nut is arranged on the box body is reduced, and the machining difficulty of the injection molding box body is reduced.

Description

Technical Field

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

[0002] Battery devices are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools. Battery devices typically house thermal management components inside the battery casing to regulate the temperature of individual battery cells. The heat exchange piping of the thermal management component connects to interfaces extending from the casing to circulate the heat exchange medium with the external environment.

[0003] In related technologies, in order to reliably connect the fasteners and the wall panels of the box, an insert nut is made during the injection molding process. The interface part is connected to this insert nut. However, during the mold opening process of the injection molded box, there is a risk of interference between this insert nut and the mold, which makes the injection molding process difficult and urgently needs improvement. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can reduce the risk of interference between the insert nut and the mold during the demolding process of the housing, and reduce the processing difficulty of the injection molded housing.

[0005] In a first aspect, this application provides a battery device, comprising: a housing, including a side plate and a bottom plate, the side plate being connected to the periphery of the bottom plate to form a cavity, the side plate having a through mounting hole; a battery cell disposed within the cavity; and a thermal management assembly, including a heat exchange body and a connector, the heat exchange body being disposed within the cavity and used to contain a heat exchange medium, the connector including a tube portion and a connecting portion, a portion of the tube portion extending out of the cavity through the mounting hole in a first direction, the heat exchange body and the tube portion being connected to communicate with the external environment, the connecting portion being disposed on the outer surface of the tube portion and bonded to the side plate along the first direction.

[0006] In the embodiment of this application, the battery device includes a housing, battery cells, and a thermal management component. The housing includes a bottom plate and a side plate, which are connected to form a chamber for accommodating the battery cells. The housing provides protection and containment for the battery cells. The thermal management component includes a heat exchange body and a connector. The heat exchange body is used to contain the heat exchange medium and is housed within the chamber for thermal connection with the battery cells. The connector includes a tube portion and a connecting portion. A portion of the tube portion extends out of the chamber through mounting holes on the side plate. The heat exchange body communicates with the external environment through the tube portion to achieve circulation of the heat exchange medium. The connecting portion is provided on the outer surface of the tube portion. The connector is reliably fixed to the housing by bonding the connecting portion to the side plate, eliminating the need for insert nuts in the housing. This reduces the risk of interference between the insert nuts and the mold during the housing demolding process, thus reducing the processing difficulty of the injection molded housing.

[0007] In some embodiments, the side plate is provided with an overflow groove on one side in a first direction, at least a portion of the connecting portion is disposed in the overflow groove along the first direction, and the mounting hole penetrates the bottom of the overflow groove.

[0008] In the embodiments of this application, by providing an overflow groove on the side plate, at least a portion of the connecting part is disposed in the overflow groove along the first direction, so as to improve the problem of glue overflow during the bonding process, which causes the surface of the wall panel to be contaminated; and during the bonding process of the connecting part, some glue overflows to the side wall of the overflow groove and the connecting part, which helps to increase the connection area between the connecting part and the side plate, improve the connection reliability between the connecting part and the side plate, and enhance the stability of the interface component.

[0009] In some embodiments, at least a portion of the outer surface of the tube body is provided with external threads, and the connector further includes a preload nut. The preload nut and the connecting portion are disposed on both sides of the side plate in a first direction. The preload nut is sleeved on the tube body and engages with the external threads. The preload nut abuts against the side plate along the first direction.

[0010] In the embodiment of this application, the pre-tightening nut and the connecting part are disposed on both sides of the side plate in the first direction. The pre-tightening nut and the external thread of the tube body are engaged. When the pre-tightening nut abuts against the side plate in the first direction, a tensile force is applied to the connecting part toward the side plate. This can achieve the pre-fixation effect of the colloid between the connecting part and the side plate, and also help to enhance the connection reliability between the connecting part and the side plate.

[0011] In some embodiments, the tube body includes a first segment and two second segments disposed on both sides thereon along a first direction, with external threads and connecting portions disposed on the two second segments, and the first segment located within a mounting hole.

[0012] In the embodiment of this application, the tube body includes a first segment and two second segments disposed on both sides of it along a first direction. The external thread and the connecting portion are disposed in the two second segments. The first segment is located inside the mounting hole, and the external thread is disposed outside the mounting hole. This helps to reduce the risk of air leakage at the mounting hole and helps to enhance the airtightness of the box.

[0013] In some embodiments, the connector further includes a seal that is disposed around the outer periphery of the tube body and located between the preload nut and the side plate in a first direction.

[0014] In the embodiment of this application, a seal is provided between the preload nut and the side plate to enhance the sealing performance at this point, which helps to improve the airtightness of the enclosure.

[0015] In some embodiments, the housing includes a reinforcement portion disposed on at least one side of the side plate in a first direction and spaced apart from the connector.

[0016] In the embodiment of this application, the side plate is provided with a reinforcing part on at least one side in the first direction, which helps to enhance the structural strength of the side plate and reduce the risk of deformation of the side plate under external force, resulting in air leakage at the mounting hole and a decrease in the airtightness of the box.

[0017] In some embodiments, the reinforcing portion includes a first reinforcing structure disposed outside the cavity, the first reinforcing structure extending along a second direction and / or a third direction, the first direction, the second direction and the third direction intersecting each other.

[0018] In the embodiment of this application, the first reinforcing structure disposed outside the cavity extends along the second direction and / or the third direction to enhance the side plate's ability to resist deformation in the second direction and / or the third direction, thereby further reducing the risk of decreased airtightness of the enclosure due to side plate deformation.

[0019] In some embodiments, the side plate is provided with an overflow groove on the side facing away from the chamber in a first direction, at least a portion of the connecting portion is provided in the overflow groove along the first direction, and a first reinforcing structure is provided around the opening of the overflow groove.

[0020] In the embodiment of this application, the first reinforcing structure surrounding the opening of the overflow groove can, on the one hand, enhance the structural strength of the side panel at the overflow groove and reduce the risk of air leakage at the mounting hole in the overflow groove; on the other hand, the first reinforcing structure surrounding the opening of the groove can also play the role of accommodating the overflow glue, further improving the problem of overflowing glue contaminating the surface of the wall panel.

[0021] In some embodiments, the base plate is connected to one end of the side plate in a second direction, the first direction and the second direction intersect, and the reinforcement includes a second reinforcement structure disposed in the cavity and extending in the second direction.

[0022] In the embodiment of this application, the second reinforcing structure disposed in the cavity helps to enhance the structural strength of the side plate. The second reinforcing structure extends in the second direction to facilitate the demolding of the box body.

[0023] In some embodiments, the connecting portion is disposed around the tube body portion.

[0024] In the embodiments of this application, the connecting part is wrapped around the tube body, which can not only enhance the connection reliability between the interface and the side plate, but also help to enhance the sealing reliability at the connection between the tube body and the side plate.

[0025] In some embodiments, the connecting portion is adhered to the side of the side plate away from the cavity.

[0026] In the embodiment of this application, the connecting part is bonded to the side of the side plate away from the cavity, which helps to reduce the difficulty of fitting the connecting part and the side plate and reduce the difficulty of installing the interface component.

[0027] In some embodiments, the base plate and side plates are integrally injection molded.

[0028] In the embodiments of this application, the bottom plate and the side plate are integrally injection molded, which helps to reduce the weight of the casing and improve the energy density of the battery device.

[0029] In some embodiments, the base plate is provided with a receiving groove, and at least part of the heat exchange body is disposed in the receiving groove.

[0030] In the embodiments of this application, at least part of the heat exchange body is disposed in the receiving groove of the bottom plate to improve the stability of the heat exchange body in the cavity.

[0031] In some embodiments, the housing further includes a cover plate and a sealing portion. The sealing portion includes a base, a protrusion, and an insert nut. The base is disposed around one end of the side plate away from the bottom plate and located outside the cavity. At least two protrusions are disposed on the side of the base facing the bottom plate and are spaced apart in the extending direction of the base. The insert nut is disposed inside the protrusion. The cavity has an opening on the side away from the bottom plate in a first direction. The cover plate covers the opening and is connected to the insert nut.

[0032] In the embodiment of this application, a sealing part is provided at the end of the side plate away from the bottom plate. The sealing part includes a base wrapped around the side plate to increase the connection area with the cover plate, which helps to improve the airtightness of the box. The sealing part also includes a protrusion with an insert nut. The cover plate and the insert nut are connected. Several protrusions are spaced apart to reduce the overall volume and weight of the sealing part, which helps to improve the energy density of the battery device.

[0033] Secondly, embodiments of this application provide an electrical device, including the battery device of any of the embodiments of the first aspect described above. Attached Figure Description

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0035] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0036] Figure 2 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0037] Figure 3 This is a schematic diagram of the structure of a battery module provided in one embodiment of the application;

[0038] Figure 4 This is an exploded view of a single battery cell provided in an embodiment of this application;

[0039] Figure 5 This is a partial exploded view of the battery device provided in one embodiment of this application;

[0040] Figure 6 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application;

[0041] Figure 7 yes Figure 6 Enlarged structural diagram at point A;

[0042] Figure 8 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application;

[0043] Figure 9 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application;

[0044] Figure 10 yes Figure 9 Enlarged structural diagram at point B;

[0045] Figure 11 This is an exploded view of the connector of a battery device provided in one embodiment of this application;

[0046] Figure 12 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application;

[0047] Figure 13 This is a front view of a battery device provided in an embodiment of this application.

[0048] Figure label:

[0049] 1. Vehicle; 101. Motor; 102. Controller;

[0050] 2. Battery assembly; 201. Battery module; 202. Housing; 2021. First housing; 2022. Second housing; 23. Base plate; 231. Receiving groove; 24. Side plate; 25. Chamber; 241. First side plate; 242. Second side plate; 243. Mounting hole; 244. Glue overflow groove; 26. Reinforcing part; 261. First reinforcing structure; 262. Second reinforcing structure; 2611. First part; 2612. Second part; 27. Sealing part; 271. Base; 272. Protrusion;

[0051] 3. Battery cell; 31. Casing; 32. Electrode assembly; 33. Electrode terminal;

[0052] 4. Thermal management components; 41. Heat exchanger body; 42. Connector; 421. Tube body; 422. Connection part; 423. External thread; 424. Preload nut; 425. Seal; 4211. First section; 4212. Second section;

[0053] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0054] 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.

[0055] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0056] 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", "circumferential", etc., 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 do not 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.

[0057] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0058] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," 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 communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0059] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0061] In related technologies, in order to reliably connect the fastener and the wall panel of the box, an insert nut is made during the injection molding process of the box. The interface part is connected to this insert nut. However, during the mold opening process of the injection molded box, there is a risk of interference between this insert nut and the mold.

[0062] The reason for the above problem is that the insert nut is usually set on the side wall of the box. The side wall will form a protrusion extending in the length or width direction of the box to accommodate the insert nut. During the mold opening process of the upper and lower molds of the injection molded box, the protrusion extending in the length or width direction can easily interfere with the mold moving up and down, resulting in molding failure.

[0063] To address the aforementioned issues, this application provides a battery device comprising a housing, individual battery cells, and a thermal management assembly. The housing includes a base plate and side plates connected to form a chamber for housing the individual battery cells. The housing provides protection and containment for the individual battery cells. The thermal management assembly includes a heat exchanger body and a connector. The heat exchanger body contains a heat exchange medium and is housed within the chamber for thermal connection with the individual battery cells. The connector includes a tube portion and a connecting portion. A portion of the tube portion extends out of the chamber through mounting holes on the side plates. The heat exchanger body communicates with the external environment through the tube portion to circulate the heat exchange medium. The connecting portion is provided on the outer surface of the tube portion. By bonding the connecting portion to the side plates, the connector is reliably fixed to the housing without the need for insert nuts in the housing. This reduces the risk of interference between the insert nuts and the mold during housing demolding, thus lowering the processing difficulty of the injection-molded housing.

[0064] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0065] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0066] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0067] The battery cell 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. The battery cell can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to this either.

[0068] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery device mentioned in this application may include a battery module or a battery pack. A battery pack generally includes a housing for encapsulating one or more battery cells. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0069] A single battery cell includes electrode components and an electrolyte. The electrode components include a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer, the latter coated on the surface of the current collector. The current collector includes a positive current-collecting section and a positive electrode tab connected to it. The current-collecting section is coated with the positive active material layer, while the tab is not. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material layer includes the positive active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer, the negative active material layer being coated on the surface of the negative current collector. The negative current collector includes a negative current collection section and a negative electrode tab connected to the negative current collection section. The negative current collection section is coated with the negative active material layer, while the negative electrode tab is not coated with the negative active material layer. The material of the negative current collector can be copper, and the negative active material layer includes negative active material, which can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0070] 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.

[0071] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1 provided in some embodiments of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 2 is installed inside vehicle 1, and the battery device 2 can be located at the bottom, front, or rear of vehicle 1. The battery device 2 can be used to power vehicle 1; for example, the battery device 2 can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 102 and a motor 101. The controller 102 is used to control the battery to supply power to the motor 101, for example, to meet the power needs of vehicle 1 during starting, navigation, and driving.

[0072] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0073] Figure 2 A schematic diagram of the structure of a battery device 2 according to an embodiment of this application is shown.

[0074] The battery device 2 mentioned in the embodiments of this application may include one or more battery cells 3 assemblies for providing voltage and capacity. The battery cell 3 assembly may include multiple battery cells 3, which are connected in series, parallel, or mixed connection via a busbar component.

[0075] In some embodiments, the battery cell 3 assembly is typically formed by arranging a plurality of battery cells 3.

[0076] As an example, the battery cell 3 assembly can be a battery module 201, which is formed by arranging and fixing multiple battery cells 3 to form an independent module. As an example, the battery module 201 can be formed by bundling multiple battery cells 3 together with cable ties.

[0077] In some embodiments, the battery device 2 may be a battery pack, which includes a housing 202 and one or more battery cell 3 assemblies, the battery cell 3 assemblies being housed in the housing 202.

[0078] As an example, the battery cell 3 assembly can be a battery module 201, and the battery cell 3 assembly can be housed in the housing 202 by fixing the battery module 201 in the housing 202.

[0079] As an example, the battery cell 3 assembly can also be housed in the housing 202 by directly fixing multiple battery cells 3 to the housing 202.

[0080] As an example, the housing 202 may include a first housing 2021 and a second housing 2022. The first housing 2021 and the second housing 2022 are fastened together to form a closed space inside the housing 202 to house the battery cell 3 assembly. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first housing 2021 may be an end cap or a bottom plate.

[0081] As an example, the housing 202 may include an end cap, a frame, and a base plate. The end cap and the base plate are respectively connected to the frame, so that the interior of the housing 202 forms a closed space to accommodate the battery cell 3 assembly.

[0082] In some embodiments, the housing 202 may be part of the chassis structure of the vehicle 1. For example, a portion of the housing 202 may be at least a portion of the floor of the vehicle 1, or a portion of the housing 202 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1.

[0083] Figure 3 A schematic diagram of the structure of a battery module 201 according to an embodiment of this application is shown.

[0084] In some embodiments, such as Figure 2 and Figure 3 As shown, there are multiple battery cells 3. These multiple battery cells 3 are first connected in series, parallel, or in a mixed manner to form a battery module 201. The multiple battery modules 201 are then connected in series, parallel, or in a mixed manner to form a whole, which is housed in the casing 202.

[0085] Multiple battery cells 3 in the battery module 201 can be electrically connected through a busbar component to achieve parallel, series, or mixed connection of multiple battery cells 3 in the battery module 201.

[0086] Figure 4 This is an exploded view of a battery cell 3 provided in an embodiment of this application. The battery cell 3 refers to the smallest unit that makes up the battery device 2. For example... Figure 4 The battery cell 3 includes an end cap assembly, a housing 31, and an electrode assembly 32.

[0087] Electrode assembly 32 is the component in the battery cell 3 where electrochemical reactions occur. The casing 31 may contain one or more electrode assemblies 32. The electrode assembly 32 is mainly formed by winding or stacking electrode sheets, which are divided into positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the electrode body, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs can be located together at one end of the electrode body or separately at both ends of the electrode body. During the charging and discharging process of the battery cell 3, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals 33 to form a current loop.

[0088] The electrode assembly 32 can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0089] In some embodiments, the electrode assembly 32 is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0090] In some embodiments, the electrode assembly 32 is a stacked structure. As an example, multiple positive and negative electrodes can be provided, with multiple positive and multiple negative electrodes stacked alternately. Multiple spacers can be provided and respectively provided between any adjacent positive or negative electrodes. Alternatively, the spacers can be provided continuously and provided between any adjacent positive or negative electrodes by folding.

[0091] In some embodiments, the electrode assembly 32 may be cylindrical, flat, or polygonal in shape.

[0092] In some embodiments, the electrode assembly 32 is provided with tabs that can conduct current from the electrode assembly 32. The tabs include a positive tab and a negative tab.

[0093] The battery cell 3 may include a housing 31. The housing 31 is an assembly used to cooperate with the end cap assembly to form the internal environment of the battery cell 3, wherein the formed internal environment can accommodate the electrode assembly 32, electrolyte (not shown in the figure), and other components. The housing 31 can be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing 31), or an aluminum-plastic film, etc. In some embodiments, the housing 31 can be a sealed structure or a non-sealed structure. As an example, when the housing 31 is a non-sealed structure, the housing 31 serves to protect the electrode assembly 32, and a sealing bag is also included between the housing 31 and the electrode assembly 32. The sealing bag is used to encapsulate the electrode assembly 32 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating material or an aluminum-plastic film. When the housing 31 is a sealed structure, it is used to encapsulate the electrode assembly 32 and electrolyte, etc.

[0094] As an example, the battery cell 3 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include square battery cells, blade-shaped battery cells, and multi-prismatic battery cells. Multi-prismatic battery cells are, for example, hexagonal prismatic battery cells. This application does not have any particular limitations.

[0095] The housing 31 and the end cap assembly can be independent components. One or more openings can be provided on the housing 31, and one or more end cap assemblies can close the openings to form the internal environment of the battery cell 3. Optionally, the end cap assembly and the housing 31 can also be integrated. Optionally, the end cap assembly and the housing 31 can form a common connection surface before other components are inserted into the housing, and the end cap assembly closes the housing 31 when it is necessary to encapsulate the interior of the housing 31.

[0096] In some embodiments, the electrode terminal 33 can be disposed on the end cap assembly or on the housing 31, and the electrode terminal 33 is electrically connected to the electrode tab. The electrode terminal 33 can be directly connected to the electrode tab or indirectly connected to the electrode tab through an adapter mechanism.

[0097] Please see Figure 5 , Figure 6 , Figure 7 and Figure 8 , Figure 5 This is a partial exploded view of the battery device provided in one embodiment of this application; Figure 6 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application; Figure 7 yes Figure 6 Enlarged structural diagram at point A; Figure 8 This is a front view of a battery device provided in an embodiment of this application.

[0098] Firstly, such as Figures 5 to 8 As shown, this application provides a battery device 2, which includes a housing 202, a battery cell (not shown), and a thermal management assembly 4. The housing 202 includes a side plate 24 and a bottom plate 23. The side plate 24 is connected to the periphery of the bottom plate 23 to form a chamber 25. The side plate 24 is provided with a mounting hole 243. The battery cell is disposed in the chamber 25. The thermal management assembly 4 includes a heat exchange body 41 and a connector 42. The heat exchange body 41 is disposed in the chamber 25 and is used to contain the heat exchange medium. The connector 42 includes a tube part 421 and a connecting part 422. A portion of the tube part 421 extends out of the chamber 25 through the mounting hole 243 in a first direction X. The heat exchange body 41 and the tube part 421 are connected to communicate with the external environment. The connecting part 422 is disposed on the outer surface of the tube part 421 and is bonded to the side plate 24 along the first direction X.

[0099] In the embodiment of this application, the battery device 2 includes a housing 202, battery cells, and a thermal management component 4. The housing 202 includes a bottom plate 23 and a side plate 24, which are connected to form a chamber 25 for accommodating the battery cells. The housing 202 provides protection and containment for the battery cells. The thermal management component 4 includes a heat exchange body 41 and a connector 42. The heat exchange body 41 is used to contain the heat exchange medium and is housed within the chamber 25 for thermally conductive connection with the battery cells. The connector 42 includes a tube portion 421 and a connecting portion 422, with a portion of the tube portion 421 connected via... The mounting hole 243 on the side plate 24 extends out of the chamber 25. The heat exchange body 41 is connected to the external environment through the tube body 421 to achieve circulation of the heat exchange medium with the external environment. The outer surface of the tube body 421 is provided with a connecting part 422. The connector 42 is reliably fixed to the box 202 by bonding the connecting part 422 to the side plate 24, without the need to set the insert nut in the box 202. This reduces the risk of interference between the insert nut and the mold during the demolding process of the box 202 due to the setting of the insert nut in the box 202, and reduces the processing difficulty of the injection molded box.

[0100] Optionally, the enclosure 202 can be a metal enclosure, with the side panels 24 and the bottom panel 23 both made of metal; or the enclosure 202 can be an injection-molded enclosure, with the side panels 24 and the bottom panel 23 integrally injection-molded.

[0101] Optionally, the side plate 24 includes two first side plates 241 and two second side plates 242. The two first side plates 241 are arranged opposite each other along a first direction X, and the two second side plates 242 are arranged opposite each other along a third direction Z. The mounting hole 243 is provided in the first side plate 241.

[0102] Optionally, the length or width direction of the housing 202 is designated as the first direction X, the other of the length or width direction of the housing 202 is designated as the third direction Z, and the depth or height direction of the housing 202 is designated as the second direction Y.

[0103] Optionally, multiple battery cells are disposed within the chamber 25, and the number of battery cells can be determined independently. For example, 1, 2, 5, 10, or 30 battery cells are disposed within the chamber 25. For example, multiple battery cells are arranged in an array along a first direction X and a third direction Z within the chamber 25.

[0104] Optionally, the heat exchanger body 41 includes heat exchange pipes and a current collector. The current collector is connected between the connector 42 and the heat exchange pipes. The heat exchange pipes are used to contain the heat exchange medium, and the temperature of the battery cells is regulated by circulating the heat exchange medium. For example, the heat exchange medium can be water, ethanol, ethylene glycol, etc.

[0105] Optionally, the heat exchanger body 41 can be thermally connected to the battery cell along a first direction X or a third direction Z, or thermally connected to the battery cell along a second direction Y. Thermal connection means that the heat exchanger body 41 is in direct contact with the battery cell, or the heat exchanger body 41 is in contact with the battery cell through a heat-conducting medium, which can be metal or non-metal.

[0106] Optionally, the two connectors 42 are respectively connected to the heat exchange body 41. The two connectors 42 are respectively used for the external environment to input heat exchange medium into the heat exchange body 41, and for the heat exchange body 41 to output heat exchange medium into the external environment.

[0107] For example, two connectors 42 are disposed on the same first side plate 241.

[0108] Optionally, the tube body 421 includes a tube wall and a cavity enclosed by the tube wall, open at both ends in a first direction X. A portion of the tube body 421 is located within the chamber 25 for connection with the heat exchange body 41, and another portion of the tube body 421 extends out of the chamber 25 through the mounting hole 243 for connection with an external heat exchange medium storage and / or circulation mechanism. Exemplarily, the tube body 421 is made of metal or non-metal.

[0109] Optionally, the shape of the tube body 421 and the shape and size of the mounting hole 243 can be designed independently. For example, the outer wall of the tube body 421 is fitted to the wall of the mounting hole 243 to reduce the risk of air leakage at the mounting hole 243. For example, the tube body 421 is cylindrical and the mounting hole 243 is a circular hole.

[0110] Optionally, a sealing structure can be provided between the tube body 421 and the mounting hole 243. The sealing structure can be a sealing ring or sealant, etc.

[0111] In some embodiments, such as Figure 5 As shown, the base plate 23 and the side plate 24 are integrally injection molded. The injection molded box helps to reduce the weight of the box 202 and the weight of the battery device 2, thereby increasing the energy density of the battery device 2.

[0112] In related technologies, the tube body 421 needs to be fixed with an insert nut on the side plate 24. In one example, in the injection molded housing, if the insert nut is set on the first side plate 241, a protruding structure extending into the cavity 25 in the first direction X needs to be formed on the first side plate 241. The end of the protruding structure opposite to the cavity 25 needs to form an opening. The insert nut is set in the protruding structure, and the external flange bolts can extend through the opening and cooperate with the insert nut to fix the connector 42 to the first side plate 241. However, when the upper and lower molds of the injection molded housing open in the third direction Z, the protruding structure extending in the first direction X has the problem of interference with the upper and lower molds, which increases the design difficulty of the injection molded housing.

[0113] Therefore, in this embodiment, the connector 42 is fixed by bonding the connecting part 422 located on the outside of the tube body 421 and the side plate 24, without the need to fix the connector 42 by insert nuts.

[0114] Optionally, at least a portion of the connecting portion 422 is spaced apart from the orthographic projection of the tube body portion 421 in the first direction X, so that the connecting portion 422 is reliably bonded to the side plate 24.

[0115] For example, the connecting part 422 is bonded to the side plate 24 by an adhesive.

[0116] Optionally, the connecting part 422 and the tube body 421 are integrally formed, which helps to reduce the risk of air leakage at the connection interface between the connecting part 422 and the tube body 421 and helps to enhance the sealing performance of the housing 202.

[0117] Optionally, the connecting part 422 and the tube body 421 are provided separately, and the connecting part 422 and the tube body 421 are bonded, snapped or threaded together to facilitate the replacement of the connecting part 422.

[0118] In some embodiments, such as Figures 5 to 7As shown, the connecting part 422 is wrapped around the tube body part 421, which can not only enhance the connection reliability between the connector 42 and the side plate 24, but also help to enhance the sealing reliability at the connection between the tube body part 421 and the side plate 24.

[0119] Optionally, the specific size and shape of the connecting part 422 can be designed by the user. For example, the connecting part 422 may be rectangular or circular.

[0120] In some embodiments, such as Figures 5 to 7 As shown, the connecting part 422 is bonded to the side of the side plate 24 facing away from the cavity 25, which helps to reduce the difficulty of fitting the connecting part 422 and the side plate 24, and reduces the difficulty of installing the connector 42. Alternatively, in some other embodiments, the connecting part 422 is bonded to the side of the side plate 24 facing into the cavity 25 to reduce the risk of external forces causing the connecting part 422 to be peeled off.

[0121] In some embodiments, such as Figure 5 As shown, the bottom plate 23 is provided with a receiving groove 231, and at least part of the heat exchange body 41 is disposed in the receiving groove 231.

[0122] In these embodiments, at least a portion of the heat exchange body 41 is disposed within the receiving groove 231 of the base plate 23 to improve the stability of the heat exchange body 41 within the chamber 25.

[0123] The receiving groove 231 provided on the base plate 23 has a slot in the second direction Y. During the injection molding process of the housing, the mold needs to open along the second direction Y to form the receiving groove 231. If an insert nut is provided on the side plate 24, the protruding structure of the insert nut is prone to interference with the mold; or if the protruding structure is spaced apart from the receiving groove 231 along the second direction Y, this requires an additional increase in the size of the housing 202 in the first direction X, resulting in a larger size of the battery device 2, a decrease in the internal utilization rate of the housing 202, and a decrease in energy density. However, in the connector 42 provided in the embodiments of this application, there is no need to provide an insert nut, thereby improving the above problems.

[0124] Optionally, the heat exchange piping is bent and extended and housed within the receiving tank 231.

[0125] In some embodiments, such as Figure 5 , Figure 6 and Figure 8As shown, the housing 202 also includes a cover plate (not shown) and a sealing part 27. The sealing part 27 includes a base 271, a protrusion 272 and an insert nut. The base 271 is wrapped around the side plate 24 at one end away from the bottom plate 23 and is located outside the chamber 25. At least two protrusions 272 are provided on the side of the base 271 facing the bottom plate 23 and are spaced apart in the extending direction of the base 271. The insert nut is provided inside the protrusion 272. The chamber 25 has an opening on the side away from the bottom plate 23 in the first direction X. The cover plate covers the opening and is connected to the insert nut.

[0126] In these embodiments, a sealing portion 27 is provided at one end of the side plate 24 away from the bottom plate 23. The sealing portion 27 includes a base 271 wrapped around the side plate 24 to increase the connection area with the cover plate, which helps to improve the airtightness of the housing 202. The sealing portion 27 also includes a protrusion 272 with an insert nut. The cover plate and the insert nut are connected. Several protrusions 272 are spaced apart to reduce the overall volume and weight of the sealing portion 27, which helps to improve the energy density of the battery device 2.

[0127] Optionally, the combination of the base plate 23, side plate 24, and sealing part 27 can be one of the first housing 2021 and the second housing 2022, and the cover plate can be the other of the first housing 2021 and the second housing 2022. The cover plate closes to the opening of the chamber 25 to form a sealed space.

[0128] Optionally, flange bolts pass through the cover plate to connect with insert nuts to secure the cover plate to the sealing part 27.

[0129] Optionally, the sealing part 27 and the side plate 24 are integrally injection molded, the base 271 and the protrusion 272 are integrally injection molded, and at least part of the insert nut is embedded in the protrusion 272.

[0130] During the injection molding process of the housing, the mold needs to open along the second direction Y to form multiple spaced protrusions 272. If an insert nut is provided on the side plate 24, the opening for forming the protruding structure to accommodate the insert nut needs to be formed by demolding along the first direction X. This contradicts the form of the housing 202 opening vertically along the second direction Y, leading to molding failure. However, in the connector 42 provided in this embodiment, there is no need to provide an insert nut, thereby improving the above problem.

[0131] In some embodiments, such as Figures 5 to 8 As shown, the side plate 24 is provided with an overflow groove 244 on one side of its first direction X, at least a portion of the connecting part 422 is provided in the overflow groove 244 along the first direction X, and the mounting hole 243 penetrates the bottom of the overflow groove 244.

[0132] In these embodiments, by providing an overflow groove 244 on the side plate 24, at least a portion of the connecting portion 422 is disposed within the overflow groove 244 along the first direction X, the problem of overflowing adhesive causing contamination of the wall panel surface during the bonding process is improved; and during the bonding process of the connecting portion 422, some adhesive overflows to the side wall of the overflow groove 244 and between the connecting portion 422, which helps to increase the connection area between the connecting portion 422 and the side plate 24, improve the connection reliability between the connecting portion 422 and the side plate 24, and enhance the stability of the joint 42.

[0133] Optionally, the connector 422 is accommodated within the overflow groove 244 to reduce the risk of adhesive overflowing into the overflow groove 244.

[0134] Optionally, the depth of the glue overflow groove 244 is between 1mm and 20mm. For example, the depth of the glue overflow groove 244 can be 1mm, 10mm, 20mm, etc.

[0135] Optionally, the connecting portion 422 is disposed outside the chamber 25, and the overflow groove 244 is disposed on the side of the side plate 24 opposite to the chamber 25. The groove wall of the overflow groove 244 surrounds the connecting portion 422 to reduce the risk of glue overflow. For example, if the connecting portion 422 is rectangular, then the overflow groove 244 is a rectangular groove; or if the connecting portion 422 is circular, then the overflow groove 244 is a circular groove.

[0136] Optionally, the connecting part 422 is disposed within the cavity 25, and the overflow groove 244 extends to the side edge of the side plate 24 away from the bottom plate 23, so as to facilitate the forming of the overflow groove 244 when the upper and lower molds of the injection molded box are opened. For example, the overflow groove 244 is a U-shaped groove.

[0137] Please see Figure 9 , Figure 10 , Figure 11 and Figure 12 , Figure 9 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application; Figure 10 yes Figure 9 Enlarged structural diagram at point B; Figure 11 This is an exploded view of the connector of a battery device provided in one embodiment of this application; Figure 12 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application.

[0138] In some embodiments, such as Figures 9 to 12 As shown, at least a portion of the outer surface of the tube body 421 is provided with an external thread 423. The connector 42 also includes a preload nut 424. The preload nut 424 and the connecting part 422 are respectively disposed on both sides of the side plate 24 in the first direction X. The preload nut 424 is sleeved on the tube body 421 and engages with the external thread 423. The preload nut 424 abuts against the side plate 24 along the first direction X.

[0139] In these embodiments, the preload nut 424 and the connecting portion 422 are respectively disposed on both sides of the side plate 24 in the first direction X. The preload nut 424 and the external thread 423 of the tube body portion 421 are engaged. When the preload nut 424 abuts against the side plate 24 in the first direction X, a tensile force is applied to the connecting portion 422 toward the side plate 24. This can achieve the pre-fixation effect of the adhesive between the connecting portion 422 and the side plate 24, and also help to enhance the connection reliability between the connector and the side plate 24.

[0140] Optionally, the preload nut 424 engages with the external thread 423 provided on the tube body 421, eliminating the need for additional bolt holes and helping to improve the airtightness of the housing 202.

[0141] Optionally, if the connecting part 422 is located outside the chamber 25, then part of the external thread 423 extends into the chamber 25, and the preload nut 424 is located inside the chamber 25; or if the connecting part 422 is located inside the chamber 25, then part of the external thread 423 is located outside the chamber 25, and the preload nut 424 is located outside the chamber 25.

[0142] For example, after applying adhesive between the connecting part 422 and the side plate 24, the connecting part 422 is bonded to the side plate 24. A pre-tightening nut 424 is screwed onto the external thread 423 of the tube body 421, with the pre-tightening nut 424 abutting against the side plate 24 along the first direction X. The connecting part 422 also abuts against the side plate 24 along the first direction X, thus completing the pre-fixation of the adhesive. After the adhesive is fixed, the pre-tightening nut 424 and the connecting part 422 are clamped onto the side plate 24, which also helps to fix the connector 42.

[0143] Optionally, the dimensions of the external thread 423 and the preload nut 424 can be designed by the user.

[0144] Optionally, a sealant is provided inside the preload nut 424 to enhance the sealing reliability of the mating interface between the preload nut 424 and the external thread 423.

[0145] In some embodiments, such as Figure 8 and Figure 11 As shown, the tube body 421 includes a first segment 4211 and two second segments 4212 disposed on both sides of it along the first direction X. The external thread 423 and the connecting part 422 are disposed on the two second segments 4212. The first segment 4211 is located in the mounting hole 243.

[0146] In these embodiments, the tube body 421 includes a first segment 4211 and two second segments 4212 disposed on both sides thereon along the first direction X. The external thread 423 and the connecting portion 422 are disposed on the two second segments 4212. The first segment 4211 is located inside the mounting hole 243, and the external thread 423 is disposed outside the mounting hole 243. This helps to reduce the risk of air leakage at the mounting hole 243 and helps to enhance the airtightness of the housing 202.

[0147] Optionally, the first segment 4211 has the same dimensions in the first direction X as the mounting dimension in the first direction X, and the external thread 423 extends to the edge of the first segment 4211, so that the preload nut 424 is tightly attached to the side plate 24 while improving the airtightness at the mounting hole 243.

[0148] Optionally, the external thread 423 is provided at one end of the second segment 4212 near the first segment 4211, and the end of the second segment 4212 away from the first segment 4211 is used for pipe connection with the heat exchange body 41.

[0149] In some embodiments, such as Figure 11 and Figure 12 As shown, the connector 42 also includes a seal 425, which is disposed around the outer periphery of the tube body 421 and located between the preload nut 424 and the side plate 24 along the first direction X.

[0150] In these embodiments, the sealing performance is enhanced by providing a seal 425 between the preload nut 424 and the side plate 24, which helps to improve the airtightness of the housing 202.

[0151] Optionally, the seal 425 is a sealing ring or a sealing gel. Exemplarily, the seal 425 includes one or a plurality of sealing rings arranged along a first direction X.

[0152] Please see Figure 13 , Figure 13 This is a partial structural schematic diagram of a battery device provided in one embodiment of this application.

[0153] In some embodiments, such as Figure 5 , Figure 8 and Figure 13 As shown, the housing 202 includes a reinforcing part 26, which is disposed on at least one side of the side plate 24 in the first direction X, and is spaced apart from the connector 42.

[0154] In these embodiments, the side plate 24 is provided with a reinforcement 26 on at least one side in the first direction X, which helps to enhance the structural strength of the side plate 24, reduce the risk of deformation of the side plate 24 under external force, resulting in air leakage at the mounting hole 243 and a decrease in the airtightness of the housing 202.

[0155] During the bonding process between the connecting part 422 and the side plate 24, the pre-estimation of the colloid between them, and the connection process between the heat exchange body 41 and the tube body 421, the connecting part 422 will squeeze the side plate 24; and during the storage and use of the battery device 2, the side plate 24 may deform under external impact, causing air leakage at the connection interface between the side plate 24 and the connector 42, resulting in a decrease in the airtightness of the housing 202. Therefore, in this embodiment, a reinforcing part 26 is provided on the side plate 24 to improve the structural strength of the side plate 24 and reduce the risk of deformation of the side plate 24.

[0156] Optionally, if the connector 42 is disposed on the first side plate 241, then the reinforcing part 26 is also disposed on the first side plate 241.

[0157] For example, the reinforcing part 26 is a reinforcing rib. For example, the specific shape and size of the reinforcing part 26 can be designed by oneself.

[0158] Optionally, the reinforcing part 26 and the side plate 24 are integrally injection molded.

[0159] In some embodiments, such as Figure 5 and Figure 8 As shown, the reinforcing part 26 includes a first reinforcing structure 261, which is disposed outside the chamber 25. The first reinforcing structure 261 extends along the second direction Y and / or the third direction Z, and the first direction X, the second direction Y and the third direction Z intersect each other.

[0160] In these embodiments, a first reinforcing structure 261 disposed outside the chamber 25 extends along the second direction Y and / or the third direction Z to enhance the ability of the side plate 24 to resist deformation in the second direction Y and / or the third direction Z, thereby further reducing the risk of a decrease in the airtightness of the housing 202 due to deformation of the side plate 24.

[0161] The first reinforcing structure 261 is disposed outside the chamber 25. The first reinforcing structure 261 may extend along the second direction Y, or the first reinforcing structure 261 may extend along a third direction Z, or the first reinforcing structure 261 may extend obliquely along both the second direction Y and the third direction Z. Alternatively, the reinforcing part 26 may include multiple first reinforcing structures 261, in which case a portion of the first reinforcing structures 261 may extend along the second direction Y, and another portion of the first reinforcing structures 261 may extend along a third direction Z.

[0162] Optionally, one or more first reinforcing structures 261 are disposed on the side plate 24. For example, the number of first reinforcing structures 261 can be 1, 2, 3, 5, 10, etc.

[0163] Optionally, a plurality of first reinforcing structures 261 are arranged around the mounting hole 243 to enhance the structural strength of the side plate 24 at the mounting hole 243 and reduce the risk of air leakage at the mounting hole 243. For example, one end of the first reinforcing structure 261 is arranged towards the center of the mounting hole 243, and the other end is arranged away from the mounting hole 243.

[0164] For example, the first reinforcing structure 261 is disposed on the first side plate 241. The size of the first reinforcing structure 261 can be designed by itself. During the injection molding of the box body, the mold can move along the second direction Y and tilt to demold in the first direction X.

[0165] In some embodiments, such as Figure 5 and Figure 8 As shown, the side plate 24 is provided with an overflow groove 244 on the side opposite to the chamber 25 in the first direction X. At least part of the connecting part 422 is provided in the overflow groove 244 along the first direction X. The first reinforcing structure 261 is provided around the opening of the overflow groove 244.

[0166] In these embodiments, the first reinforcing structure 261 surrounding the opening of the overflow groove 244 can, on the one hand, enhance the structural strength of the side plate 24 at the overflow groove 244 and reduce the risk of air leakage at the mounting hole 243 inside the overflow groove 244; on the other hand, the first reinforcing structure 261 surrounding the opening can also serve to contain the overflowing glue, further improving the problem of overflowing glue contaminating the surface of the wall panel.

[0167] Optionally, the specific shape and size of the first reinforcing structure 261 can be designed independently. For example, the first reinforcing structure 261 can be in the form of a ring or a rectangular frame, wrapped around the opening of the adhesive overflow groove 244. For example, the first reinforcing structure 261 is disposed at the edge of the opening of the adhesive overflow groove 244, improving the problem of adhesive overflow contaminating the surface of the side panel 24.

[0168] Optionally, multiple first reinforcing structures 261 are coaxially arranged around the center of the overflow groove 244 and spaced apart from each other to enhance the structural strength of the side plate 24 at the overflow groove 244.

[0169] Optionally, the first reinforcing structure 261 includes a first part 2611 and a second part 2612. The first part 2611 is arranged around the opening of the overflow groove 244. One end of the second part 2612 is connected to the first part 2611, and the other end extends away from the overflow groove 244 along the second direction Y and / or the third direction Z, so as to improve the structural strength of the side plate 24 at the overflow groove 244.

[0170] In some embodiments, such as Figure 5 and Figure 13As shown, the base plate 23 is connected to one end of the side plate 24 in the second direction Y, the first direction X and the second direction Y intersect, and the reinforcement part 26 includes a second reinforcement structure 262, which is disposed in the cavity 25 and extends in the second direction Y.

[0171] In these embodiments, a second reinforcing structure 262 disposed within the chamber 25 helps to enhance the structural strength of the side plate 24. The second reinforcing structure 262 extends in the second direction Y to facilitate the demolding of the housing 202.

[0172] The second reinforcing structure 262, which is located in the cavity 25, extends along the second direction Y, reducing the molding difficulty of the second part 2612 structure during the molding process of the injection molded box body opening up and down along the second direction Y.

[0173] Optionally, one or more second reinforcing structures 262 are disposed on the side plate 24. For example, the number of second reinforcing structures 262 can be 1, 2, 3, 5, 10, etc.

[0174] Optionally, a preload nut 424 is disposed within the chamber 25, and several second reinforcing structures 262 are disposed on both sides of the preload nut 424 in the third direction Z to enhance the structural strength of the side plate 24 in the mounting hole 243 area.

[0175] Secondly, embodiments of this application provide an electrical device, including the battery device of any of the embodiments of the first aspect described above.

[0176] In some embodiments, such as Figures 1 to 13As shown, the battery device 2 includes a housing 202, battery cells 3, and a thermal management assembly 4. The housing 202 includes a side plate 24, a bottom plate 23, and a reinforcing part 26. The side plate 24 is connected to the periphery of the bottom plate 23 to form a chamber 25. An overflow groove 244 is provided on the side of the side plate 24 away from the chamber 25, and a mounting hole 243 is provided through the bottom of the groove. The reinforcing part 26 is provided on the side plate 24 and includes a first reinforcing structure 261 provided outside the chamber 25 and a second reinforcing structure 262 provided inside the chamber 25. The first reinforcing structure 261 is arranged around the opening of the overflow groove 244, and the second reinforcing structure 262 extends along the second direction Y. The battery cells 3 are disposed inside the chamber 25. The thermal management assembly 4 includes a heat exchange body 41 and a connector 42. The heat exchange body 41 is disposed inside the chamber 25 and is used to contain the heat exchange medium. The connector 42 includes The tube body 421, connecting part 422, preload nut 424, and sealing element 425 are provided. Part of the tube body 421 extends out of the chamber 25 through the mounting hole 243 in the first direction X. The heat exchange body 41 and the tube body 421 are connected to communicate with the external environment. The connecting part 422 is provided on the outer surface of the tube body 421 and is accommodated in the overflow groove 244. The connecting part 422 is bonded to the side plate 24. At least part of the outer surface of the tube body 421 is provided with external thread 423. The preload nut 424 and the connecting part 422 are respectively provided on both sides of the side plate 24 in the first direction X. The preload nut 424 is sleeved on the tube body 421 and engages with the external thread 423. The preload nut 424 abuts against the side plate 24 in the first direction X. The sealing element 425 is wrapped around the outer periphery of the tube body 421 and is located between the preload nut 424 and the side plate 24 in the first direction X.

[0177] In these embodiments, the battery device 2 includes a housing 202, battery cells 3, and a thermal management assembly 4. The housing 202 includes a bottom plate 23 and side plates 24, which are connected to form a chamber 25 for accommodating the battery cells 3. The housing 202 provides protection and housing for the battery cells 3. The thermal management assembly 4 includes a heat exchange body 41 and a connector 42. The heat exchange body 41 is used to contain a heat exchange medium and is housed within the chamber 25 for thermally conductive connection with the battery cells 3. The connector 42 includes a tube portion 421 and a connecting portion 422, with a portion of the tube portion 421 communicating with the battery cells 3. The mounting hole 243 on the side plate 24 extends out of the chamber 25. The heat exchange body 41 communicates with the external environment through the tube body 421 to achieve circulation of the heat exchange medium with the external environment. The outer surface of the tube body 421 is provided with a connecting part 422. The connector 42 is reliably fixed to the box body 202 by bonding the connecting part 422 to the side plate 24, without the need to set the insert nut in the box body 202. This reduces the risk of interference between the insert nut and the mold during the demolding process of the box body 202 due to the setting of the insert nut in the box body 202, and reduces the processing difficulty of the injection molded box body.

[0178] 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: The enclosure includes a side panel and a bottom panel, wherein the side panel is connected to the periphery of the bottom panel to form a cavity, and the side panel is provided with mounting holes through it; A single battery cell is disposed within the cavity; A thermal management assembly includes a heat exchange body and a connector. The heat exchange body is disposed in the chamber and is used to contain a heat exchange medium. The connector includes a tube portion and a connecting portion. A portion of the tube portion extends out of the chamber through the mounting hole in a first direction. The heat exchange body and the tube portion are connected to communicate with the external environment. The connecting portion is disposed on the outer surface of the tube portion and is bonded to the side plate along the first direction.

2. The battery device according to claim 1, characterized in that, The side plate is provided with an overflow groove on one side in the first direction, at least a portion of the connecting part is provided in the overflow groove along the first direction, and the mounting hole penetrates the bottom of the overflow groove.

3. The battery device according to claim 1, characterized in that, At least a portion of the outer surface of the tube body is provided with external threads, and the connector further includes a preload nut. The preload nut and the connecting portion are located on both sides of the side plate in a first direction. The preload nut is sleeved on the tube body and engages with the external threads. The preload nut abuts against the side plate along the first direction.

4. The battery device according to claim 3, characterized in that, The tube body includes a first segment and two second segments disposed on both sides thereon along the first direction. The external thread and the connecting portion are disposed in the two second segments, and the first segment is located in the mounting hole.

5. The battery device according to claim 3, characterized in that, The connector also includes a sealing element, which is wrapped around the outer periphery of the tube body and located between the preload nut and the side plate along the first direction.

6. The battery device according to claim 1, characterized in that, The enclosure includes a reinforcing part disposed on at least one side of the side plate in a first direction and spaced apart from the connector.

7. The battery device according to claim 6, characterized in that, The reinforcing part includes a first reinforcing structure disposed outside the cavity. The first reinforcing structure extends along a second direction and / or a third direction, and the first direction, the second direction and the third direction intersect each other.

8. The battery device according to claim 7, characterized in that, The side plate is provided with an overflow groove on the side facing away from the chamber in the first direction, at least a portion of the connecting part is provided in the overflow groove along the first direction, and the first reinforcing structure is provided around the opening of the overflow groove.

9. The battery device according to claim 6, characterized in that, The base plate is connected to one end of the side plate in a second direction, where the first direction and the second direction intersect. The reinforcing portion includes a second reinforcing structure, which is disposed within the cavity and extends in the second direction.

10. The battery device according to claim 1, characterized in that, The connecting part is wound around the tube body.

11. The battery device according to any one of claims 1-10, characterized in that, The connecting part is bonded to the side of the side plate away from the cavity.

12. The battery device according to claim 1, characterized in that, The base plate and the side plate are integrally injection molded.

13. The battery device according to claim 12, characterized in that, The base plate is provided with a receiving groove, and at least part of the heat exchange body is disposed in the receiving groove.

14. The battery device according to claim 12, characterized in that, The housing also includes a cover plate and a sealing part. The sealing part includes a base, a protrusion, and an insert nut. The base is wrapped around the side plate at one end away from the bottom plate and located outside the cavity. At least two protrusions are provided on the side of the base facing the bottom plate and are spaced apart in the extending direction of the base. The insert nut is provided inside the protrusion. The cavity has an opening on the side away from the bottom plate in the first direction. The cover plate covers the opening and is connected to the insert nut.

15. An electrical appliance, characterized in that, Includes the battery device described in any one of claims 1-14.

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