Battery device and electric equipment

Abstract

The utility model is suitable for the technical field of batteries, and provides a battery device and electric equipment. The battery device comprises a box body, a connector assembly and a battery monomer, the box body comprises a frame and a heat exchange plate, the frame comprises a mounting plate located outside the box body, the mounting plate is a solid panel, the heat exchange plate covers an opening in one side of the frame, the heat exchange plate comprises a protruding part extending to the outside of the box body, and the mounting plate and the protruding part are arranged in an attached mode and connected in a sealed mode; the connector assembly comprises a connecting connector and a first sealing piece, the connecting connector is assembled on the mounting plate and communicates with a heat exchange runner in the heat exchange plate, and the first sealing piece is arranged between the connecting connector and the mounting plate; the battery monomers are accommodated in the box body; according to the technical scheme, by improving the structure of the box body, the sealing reliability of the box body can be effectively improved, and the sealing failure risk of the 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 appliance. Background Technology

[0002] Existing batteries are typically equipped with thermal management systems to ensure stable operation within a suitable temperature range over extended periods. Among these systems, heat exchange plates, as highly efficient active heat exchange components, are widely used in various battery products.

[0003] In related technologies, heat exchange plates can be directly integrated into the battery housing, with external connectors used for the input and output of the heat exchange medium. However, this approach has reliability issues in practical applications: airtightness problems can easily occur at the assembly points of the connectors, thereby increasing the risk of battery seal failure. Utility Model Content

[0004] In view of this, embodiments of this application provide a battery device and electrical equipment to improve the sealing reliability of the battery housing and reduce the risk of battery housing sealing failure.

[0005] An embodiment of the first aspect of this application provides a battery device, comprising: a housing, including a frame and a heat exchange plate, the frame including a mounting plate located outside the housing, the mounting plate being a solid panel, the heat exchange plate covering an opening on one side of the frame, the heat exchange plate including a protrusion extending to the outside of the housing, the mounting plate being fitted and sealed to the protrusion; a connector assembly including a connecting connector and a first seal, the connecting connector being mounted on the mounting plate and communicating with a heat exchange channel inside the heat exchange plate, the first seal being disposed between the connecting connector and the mounting plate; and a battery cell housed inside the housing.

[0006] The battery device provided in this application embodiment has a mounting plate on the frame of the housing. The heat exchange plate includes a protrusion extending to the outside of the housing. The protrusion is fitted and sealed to the mounting plate, thus forming a first sealing structure between the protrusion and the mounting plate. Furthermore, a connecting joint is assembled on the mounting plate, and a first sealing element is added between the connecting joint and the mounting plate, thus forming a second sealing structure between the connecting joint and the mounting plate. The second sealing structure can work in conjunction with the first sealing structure to form a double sealing defense, and can independently perform a sealing function after the first sealing structure fails, thereby effectively improving the sealing reliability of the housing. At the same time, the mounting plate is designed as a solid panel, which directly reduces the leakage path and can prevent air or liquid leakage from the side of the panel. In addition, the solid panel can provide long-term reliable support for the connecting joint, thereby further reducing the risk of housing sealing failure.

[0007] In some embodiments, the connection includes a body flange abutting against a mounting plate, the surface of the body flange and / or the mounting plate having an annular groove, and a first seal being at least partially accommodated in the annular groove.

[0008] In the above design, the first sealing element, in conjunction with the annular groove, can form an embedded sealing structure. This sealing structure has good sealing performance. At the same time, the annular groove can limit the first sealing element, reducing the risk of displacement or detachment of the first sealing element during assembly and long-term use, thus making the sealing structure more reliable.

[0009] In some embodiments, the annular groove includes a first annular groove on the main flange and a second annular groove on the mounting plate, the first annular groove and the second annular groove being disposed opposite to each other, and the first seal being accommodated in the first annular groove and the second annular groove.

[0010] In the above design, after the first sealing element is placed in the first annular groove and the second annular groove, it can naturally form a blocking interface, which is conducive to further improving the sealing reliability.

[0011] In some embodiments, the mounting plate is provided with mounting holes, and the connecting joint includes a first connecting pipe connected to the main flange. The first connecting pipe is inserted into the mounting hole and is connected to the protrusion and communicates with the heat exchange channel.

[0012] In the above design, the connecting joint is directly connected to the heat exchange plate through the first pipe. The connection structure is reliable and the sealing performance is good, which helps to reduce the risk of coolant leakage from the mounting plate or corrosion of the first seal.

[0013] In some embodiments, the protrusion has a second connecting pipe communicating with the heat exchange channel, the second connecting pipe being inserted into the mounting hole and engaging with the first connecting pipe, and the connector assembly further includes a second sealing element disposed between the first connecting pipe and the second connecting pipe.

[0014] In the above design, the connecting joint and the heat exchange plate are connected by two short connecting pipes, which is simple in structure and easy to disassemble and assemble. At the same time, a second sealing element is provided between the first and second connecting pipes, which helps to improve the connection sealing between the connecting joint and the heat exchange plate, thereby further reducing the risk of coolant leakage.

[0015] In some embodiments, the first seal includes a sealing ring or a sealing gasket.

[0016] The above design provides a variety of types of seals to meet different design requirements.

[0017] In some embodiments, the frame includes multiple mounting plates, and the connector assembly includes multiple connecting connectors, which are respectively mounted on different mounting plates.

[0018] In the above design, by distributing multiple connecting joints on different mounting plates, the vibration intensity in the connecting joint assembly area can be reduced, thereby helping to reduce the risk of enclosure seal failure.

[0019] In some embodiments, the frame includes a frame body, and the mounting plate and the frame body are integrally formed.

[0020] In the above design, the mounting plate and the main frame are designed as an integrated structure, which helps to improve the structural strength and impact resistance of the frame, thereby improving the reliability of the box and battery device.

[0021] In some embodiments, the mounting plate is integrally die-cast with the frame body.

[0022] In the above design, the die casting process has a high degree of design freedom and production efficiency. At the same time, the frame structure made by die casting has good performance and high reliability.

[0023] In some embodiments, the mounting plate and the protrusion are connected by brazing.

[0024] In the above design, the brazing process not only achieves a sealed connection between the mounting plate and the protrusion, but also enhances the overall strength of the combined structure, thereby further improving the reliability of the housing and battery device.

[0025] An embodiment of the second aspect of this application provides an electrical device including the battery device in the embodiments of the first aspect, the battery device being used to store or provide electrical energy.

[0026] The electrical equipment provided in this application embodiment can effectively improve the reliability of the electrical equipment by adopting the battery device of the first aspect.

[0027] 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, specific embodiments of this application are given below. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 The structural schematic diagram of the vehicle provided in this application embodiment;

[0030] Figure 2 This is an exploded view of the battery device provided in the embodiments of this application;

[0031] Figure 3 This is an exploded view of a single battery cell provided in an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the battery device provided in the embodiments of this application;

[0033] Figure 5 yes Figure 4 Enlarged view of the structure shown in Figure A;

[0034] Figure 6 yes Figure 4 Top view of the battery device shown;

[0035] Figure 7 yes Figure 6 Sectional view along the BB direction;

[0036] Figure 8 yes Figure 7 An enlarged view of the structure shown in C.

[0037] The markings in the diagram mean:

[0038] 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor;

[0039] 10. Housing; 11. Frame; 111. Mounting plate; 1111. Second annular groove; 1112. Mounting hole; 112. Frame body; 1121. End beam; 1122. Side beam; 12. Heat exchange plate; 121. Protrusion; 1211. Second connecting pipe; 122. Heat exchange channel; 123. First plate; 124. Second plate; 13. Bottom guard plate; 14. Cover plate;

[0040] 20. Battery cell; 21. End cap; 21a. Electrode terminal; 22. Housing; 23. Electrode assembly; 23a. Tab; 24. Pressure relief mechanism;

[0041] 30. Connector assembly; 31. Connecting joint; 311. Main flange; 3111. First annular groove; 312. First connecting pipe; 313. Third connecting pipe; 32. First seal; 321. Sealing ring; 33. Second seal. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0047] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0048] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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.

[0049] In the description of the embodiments of this application, unless otherwise expressly specified and limited, 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.

[0050] During battery charging and discharging, a large amount of heat is generated due to internal resistance and electrochemical reactions. If this heat cannot be dissipated in time, the battery temperature will rise, affecting battery performance and cycle life, and even causing thermal runaway. Therefore, existing batteries are usually equipped with thermal management systems to regulate the battery temperature, enabling the battery to operate stably within a suitable temperature range over a long period. Among these systems, heat exchange plates, as highly efficient active heat exchange components, have been widely used in various battery products.

[0051] In related technologies, heat exchange plates can be integrated into the bottom of the battery housing, and the input and output of the heat exchange medium can be achieved through an external connection joint. In a common solution, the connection joint needs to be fixed to the outside of the housing by an additional profile bracket, and the connecting end of the connection joint passes through the profile bracket to connect to the heat exchange plate and communicate with the heat exchange channels inside the heat exchange plate. However, the above solution has reliability risks in practical applications: in the assembly area of ​​the connection joint, the flow of the heat exchange medium causes the profile bracket and the heat exchange plate to vibrate for a long time, which can easily lead to cracks and desoldering between the components in this area, resulting in a decrease in the airtightness of the housing. Furthermore, there is a lack of reliable sealing structures between the connection joint and the profile bracket, and between the profile bracket and the heat exchange plate, allowing gas to easily enter the housing along the assembly path of the connection joint. In other words, the battery housing is prone to sealing failure.

[0052] For the reasons mentioned above, this application provides a battery device, including a housing, a connector assembly, and battery cells housed within the housing. The housing includes a frame and a heat exchange plate. The connector assembly includes a connecting connector and a first sealing element. The frame has a mounting plate, and the heat exchange plate includes a protrusion extending to the outside of the housing. The protrusion is fitted and sealed to the mounting plate, thus forming a first sealing structure. Furthermore, the mounting plate is designed as a solid panel, and the connecting connector is mounted on the mounting plate. The first sealing element is located between the connecting connector and the mounting plate, forming a second sealing structure. Therefore, the second sealing structure can work in conjunction with the first sealing structure to form a double sealing defense, and can independently perform a sealing function after the first sealing structure fails, thereby improving the sealing reliability of the housing and effectively reducing the risk of housing seal failure.

[0053] The battery device provided in this application embodiment can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery device as an energy storage element. The electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, 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.

[0054] For ease of explanation, this application uses a vehicle 1000 as an example of an electrical device.

[0055] 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.

[0056] 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.

[0057] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and battery cells 20, the battery cells 20 being housed within the housing 10.

[0058] The housing 10 provides a space for accommodating the battery cell 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first housing and a second housing, which overlap each other, and together define a space for accommodating the battery cell 20. The second housing may be a hollow structure with one end open, and the first housing may be a plate-like structure, with the first housing covering the open side of the second housing so that the first housing and the second housing together define the space; alternatively, both the first and second housings may be hollow structures with one side open, with the open side of the first housing covering the open side of the second housing. Of course, the housing 10 formed by the first housing and the second housing can be of various shapes, such as a cylinder, a cuboid, etc.

[0059] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0060] In the battery device 100, there can be multiple battery cells 20. These multiple battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, multiple battery cells 20 can first be connected in series, parallel, or in a mixed configuration to form a battery cell assembly, and then the battery cell assemblies can be connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. The battery device 100 may also include other structures; for example, the battery device 100 may also include a busbar component for realizing the electrical connection between the multiple battery cells 20.

[0061] A battery cell 20 refers to the smallest unit that makes up the battery device 100. Each battery cell 20 can be a rechargeable battery, meaning that after the battery cell 20 has been discharged, the active materials can be activated by charging to continue its use. The battery cell 20 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., but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0062] Please refer to Figure 3 , Figure 3 This is an exploded view of a battery cell 20 provided in some embodiments of this application. The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0063] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength, so that end cap 21 is not easily deformed under pressure or impact, giving battery cell 20 higher structural strength and improved safety performance. End cap 21 can be provided with functional components such as electrode terminals 21a, which can be used to electrically connect to electrode assembly 23 for outputting or inputting electrical energy into battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism 24 for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating component may be provided on the inner side of the end cap 21. The insulating component can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce short-circuit wind direction. For example, the insulating component may be made of plastic, rubber, etc.

[0064] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing 22. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The housing 22 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0065] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator may also be provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals 21a to form a current loop.

[0066] The technical solutions provided in the embodiments of this application will be described below with reference to the accompanying drawings. In the embodiments provided in this application, the X direction is the width direction of the battery device 100, the Y direction is the length direction of the battery device 100, and the Z direction is the height direction of the battery device 100. The X, Y, and Z directions are perpendicular to each other.

[0067] According to some embodiments of this application, refer to Figures 4-8 , Figure 4 This is a schematic diagram of the structure of the battery device 100 provided in the embodiments of this application. Figure 5 yes Figure 4 An enlarged view of the structure shown in diagram A. Figure 6 yes Figure 4 A top view of the battery device 100 shown. Figure 7 yes Figure 6 Sectional view along the BB direction. Figure 8 yes Figure 7 An enlarged view of the structure shown in C. An embodiment of the first aspect of this application provides a battery device 100, please refer to... Figure 2 , Figure 4 and Figure 5 The battery assembly 100 includes a housing 10, battery cells 20 housed inside the housing 10, and a connector assembly 30. The housing 10 includes a frame 11 and a heat exchange plate 12. The frame 11 includes a mounting plate 111 located outside the housing 10. The mounting plate 111 is a solid panel. The heat exchange plate 12 covers an opening on one side of the frame 11 and includes a protrusion 121 extending outside the housing 10. The mounting plate 111 is fitted and sealed to the protrusion 121. The connector assembly 30 includes a connecting joint 31 and a first seal 32. The connecting joint 31 is mounted on the mounting plate 111 and communicates with a heat exchange channel 122 inside the heat exchange plate 12. The first seal 32 is located between the connecting joint 31 and the mounting plate 111.

[0068] The frame 11 is a component used to cooperate with the heat exchange plate 12 to form the internal environment of the housing 10. The frame 11 includes a frame body 112, which is closed around the height direction of the housing 10. The frame body 112 has opposite sides in the height direction of the housing 10, and the sides form openings. The frame body 112 can be of various shapes; for example, it can be a circular ring structure or a rectangular ring structure. The frame body 112 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, magnesium alloy, hard metal, or other robust materials.

[0069] Mounting plate 111 refers to a plate-like platform extending from frame 11 to the outside of housing 10, mainly used to provide an installation base and mechanical support for connector assembly 30. Specifically, mounting plate 111 can be connected to the outer wall of frame body 112 and is located on the side close to heat exchange plate 12; mounting plate 111 is a solid structure, and is not limited in location. Mounting plate 111 can be manufactured by die casting process. In the height direction of housing 10, mounting plate 111 has a certain thickness and includes two opposing surfaces, one surface can be used to assemble connecting connector 31, and the other surface can be used to fit heat exchange plate 12; mounting plate 111 can be provided with through holes, threaded holes, and other structures to install and fix connecting connector 31. Mounting plate 111 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, magnesium alloy, hard metal, or other strong materials.

[0070] The heat exchange plate 12 is a heat exchange structural component integrated into the housing 10. The heat exchange plate 12 can directly serve as the bottom plate of the housing 10, forming a space with the frame 11 to accommodate the battery cell 20. Alternatively, the heat exchange plate 12 and the frame 11 can be connected, fixed, and sealed by welding, bolting, gluing, or other methods. The heat exchange plate 12 can directly or indirectly contact the battery cell 20 and exchange heat with it. For example, in a low-temperature environment, a high-temperature heat exchange medium can be introduced into the heat exchange plate 12 to increase the temperature of the battery cell 20; in a high-temperature environment, a low-temperature heat exchange medium can be introduced into the heat exchange plate 12 to decrease the temperature of the battery cell 20. The heat exchange plate 12 can be a metal plate with a closed heat exchange channel 122 inside. The heat exchange channel 122 is used for the flow of the heat exchange medium. Alternatively, the heat exchange channel 122 can be a serpentine channel, a parallel channel, etc., and the heat exchange medium can be a water-ethylene glycol mixture, etc. The heat exchange plate 12 can be made of a material with high mechanical strength and high thermal conductivity, such as aluminum alloy, magnesium alloy, etc.

[0071] The protrusion 121 is an extension structure formed on one side of the heat exchange plate 12, mainly used to lead the heat exchange channel 122 out to the outside of the housing 10 and connect to the external liquid supply pipeline. For example, the heat exchange plate 12 may include an integrally formed main body and a protrusion 121. The main body is used to connect to the frame body 112 and cooperate with the frame body 112 to form an accommodating space. The protrusion 121 is used to set the inlet and outlet interfaces and connect to the external connecting joint 31. It can be understood that the inlet interface of the protrusion 121 is connected to the beginning of the heat exchange channel 122, and the outlet interface is connected to the end of the heat exchange channel 122.

[0072] The connecting joint 31 is a detachable connection structure for connecting pipelines; the connecting joint 31 can be of various types, such as quick-connect fittings, flange fittings, etc. The connecting joint 31 may include a positioning part and a connecting part, wherein the positioning part can be used to connect to the mounting plate 111, and the connecting part can be used to connect to the heat exchange plate 12 or an external liquid supply pipeline. The connecting joint 31 is externally mounted on the mounting plate 111, which can reduce the space occupied inside the housing 10 and enable the replenishment of heat exchange medium from outside the housing 10.

[0073] The first seal 32 is a sealing element used to fill the minute gap between the contact interface between the connecting joint 31 and the mounting plate 111, forming a reliable sealing structure. Optionally, the first seal 32 can be an elastic sealing element, such as a sealing ring 321 or a sealing gasket made of an elastic material.

[0074] In the battery device 100 provided in this application embodiment, a mounting plate 111 is provided on the frame 11 of the housing 10. The heat exchange plate 12 includes a protrusion 121 extending to the outside of the housing 10. The protrusion 121 is fitted and sealed to the mounting plate 111, thus forming a first sealing structure between the protrusion 121 and the mounting plate 111. Furthermore, a connecting joint 31 is assembled on the mounting plate 111, and a first sealing element 32 is added between the connecting joint 31 and the mounting plate 111, thus forming a second sealing structure between the connecting joint 31 and the mounting plate 111. The second sealing structure can work with the first sealing structure to form a double sealing defense, and can independently perform a sealing function after the first sealing structure fails, thereby effectively improving the sealing reliability of the housing 10. At the same time, the mounting plate 111 is designed as a solid panel, which directly reduces the leakage path and can prevent air or liquid leakage from the side of the plate. In addition, the solid panel can provide long-term reliable support for the connecting joint 31, thereby further reducing the risk of sealing failure of the housing 10.

[0075] In some embodiments, please refer to Figure 6 , Figure 7 and Figure 8 The connecting joint 31 includes a main flange 311 abutting against the mounting plate 111. The surface of the main flange 311 and / or the mounting plate 111 is provided with an annular groove, and the first seal 32 is at least partially accommodated in the annular groove.

[0076] Specifically, the main flange 311 is fitted onto the surface of the mounting plate 111 away from the protrusion 121. The main flange 311 and the mounting plate 111 have multiple opposing mounting holes. The main flange 311 is assembled onto the mounting plate 111 using bolts, screws, and other fasteners. Understandably, the main flange 311 generally also has a through hole in its center, which serves to form a flow channel for the heat exchange medium.

[0077] At least one of the main flange 311 and the mounting plate 111 is provided with an annular groove for providing installation space for the first seal 32; for example, the main flange 311 is provided with a first annular groove 3111, and / or the mounting plate 111 is provided with a second annular groove 1111. The annular groove may be circular or other irregular closed shapes, and the number of annular grooves may be one, two, or more.

[0078] Understandably, the first seal 32 can be an elastic element. To improve the reliability of the first seal 32, in the assembly direction of the main flange 311 and the mounting plate 111, the height of the first seal 32 in its natural state should be slightly greater than the depth of the annular groove.

[0079] In the above embodiments, the first sealing element 32, in conjunction with the annular groove, can form an embedded sealing structure. This sealing structure has good sealing performance. At the same time, the annular groove can limit the first sealing element 32, reducing the risk of displacement or detachment of the first sealing element 32 during assembly and long-term use, thus making the sealing structure more reliable.

[0080] In some embodiments, please refer to Figure 8 The annular groove includes a first annular groove 3111 on the main flange 311 and a second annular groove 1111 on the mounting plate 111. The first annular groove 3111 and the second annular groove 1111 are arranged opposite to each other. The first sealing member 32 is accommodated in the first annular groove 3111 and the second annular groove 1111.

[0081] For example, the main flange 311 has a through hole at its center, and the surface of the main flange 311 facing the mounting plate 111 is provided with a first annular groove 3111, which is circular and surrounds the through hole; the mounting plate 111 is provided with a mounting hole 1112 for assembling the connecting joint 31, and the surface of the mounting plate 111 facing the main flange 311 is provided with a second annular groove 1111, which is circular and surrounds the mounting hole 1112.

[0082] The first annular groove 3111 and the second annular groove 1111 are opposite to each other, meaning that the first annular groove 3111 and the second annular groove 1111 are aligned in position and have the same outline shape. The depths of the first annular groove 3111 and the second annular groove 1111 can be the same or different; along the assembly direction of the main flange 311 and the mounting plate 111, the thickness of the sealing ring 321 can be the same or different, and correspondingly, the radial dimensions of the first annular groove 3111 and the second annular groove 1111 can be the same or different.

[0083] Understandably, the first seal 32 can be an elastic element. To improve the reliability of the first seal 32, in the assembly direction of the main flange 311 and the mounting plate 111, the height of the first seal 32 in its natural state is slightly greater than the total depth of the first annular groove 3111 and the second annular groove 1111.

[0084] It should be noted that in this embodiment, the mounting plate 111 is designed as a solid panel, which can not only solve the problem of air and liquid leakage on the side of the plate, but also provide space for the annular groove.

[0085] In the above embodiments, after the first sealing member 32 is disposed in the first annular groove 3111 and the second annular groove 1111, it can naturally form a blocking interface, which is beneficial to further improve the sealing reliability.

[0086] In some embodiments, the first seal 32 includes a sealing ring.

[0087] The sealing ring 321 is a closed ring structure, and its shape and size are adapted to the annular groove. The sealing ring 321 can be made of elastic materials that are resistant to high temperature, corrosion and aging, such as nitrile rubber, fluororubber, silicone rubber and so on.

[0088] In the assembly direction of the main flange 311 and the mounting plate 111, the sealing ring 321 can be compressed and undergo elastic deformation, thereby filling the tiny gap between the main flange 311 and the mounting plate 111 to form a reliable line sealing structure.

[0089] In some embodiments, the first seal 32 includes a sealing gasket.

[0090] The gasket can be a thin film structure with a clearance hole in the center, which is opposite to the through hole on the main flange 311 for assembling and connecting short pipes or forming a coolant flow channel. The gasket can be made of elastic materials that are resistant to high temperature, corrosion and aging, such as nitrile rubber, fluororubber, silicone rubber, etc.

[0091] In the assembly direction of the main flange 311 and the mounting plate 111, the gasket can be compressed and undergo elastic deformation, thereby filling the tiny gap between the main flange 311 and the mounting plate 111 to form a reliable surface sealing structure.

[0092] In some embodiments, please refer to Figure 8 The mounting plate 111 is provided with mounting holes 1112. The connecting joint 31 includes a first pipe 312 connected to the main flange 311. The first pipe 312 is inserted into the mounting hole 1112. The first pipe 312 is connected to the protrusion 121 and communicates with the heat exchange channel 122.

[0093] Mounting hole 1112 is a through hole that penetrates the mounting plate 111.

[0094] The first connecting pipe 312 is a short connecting pipe installed on the main flange 311. The first connecting pipe 312 communicates with the main flange 311 and together form a flow channel for the heat exchange medium. In any case, the first connecting pipe 312 and the main flange 311 can be separate structures, fixed together by threaded connections, bolted connections, snap-fit ​​connections, adhesive connections, welding, etc., or the first connecting pipe 312 and the main flange 311 can also be an integral structure. The first connecting pipe 312 is inserted into the mounting hole 1112, and can be either spaced apart from or flush with the inner wall of the mounting hole 1112. The first connecting pipe 312 can be of various shapes, such as a cylindrical short pipe or other irregularly shaped short pipes; the first connecting pipe 312 can be made of various materials, such as aluminum alloy, stainless steel, engineering plastics, etc.

[0095] It should be noted that the first connecting pipe 312 is located on the side of the main flange 311 facing the heat exchange plate 12 and is used to connect the heat exchange plate 12. The connecting joint 31 may also include a third connecting pipe 313, which is located on the side of the main flange 311 away from the heat exchange plate 12 and is used to connect the external liquid supply pipeline.

[0096] In the above embodiments, the connecting joint 31 is directly connected to the heat exchange plate 12 through the first pipe 312. The connection structure is reliable and the sealing performance is good, which helps to reduce the risk of heat exchange medium leaking from the mounting plate 111 or corroding the first seal 32.

[0097] In some embodiments, please refer to Figure 8 The protrusion 121 has a second pipe 1211 that communicates with the heat exchange channel 122. The second pipe 1211 is inserted into the mounting hole 1112 and is engaged with the first pipe 312. The connector assembly 30 also includes a second sealing member 33 disposed between the first pipe 312 and the second pipe 1211.

[0098] The second connecting pipe 1211 is a short connecting pipe provided on the protrusion 121, communicating with the heat exchange channel 122 inside the heat exchange plate 12, and used to connect the external connecting joint 31. In any case, the second connecting pipe 1211 and the main plate of the heat exchange plate 12 can be separate structures, fixed together by threaded connection, adhesive connection, welding, etc., or the second connecting pipe 1211 and the main plate of the heat exchange plate 12 can be an integral structure. For example, the heat exchange plate 12 includes a first plate 123 and a second plate 124 opposite to each other, with a heat exchange channel 122 between the first plate 123 and the second plate 124, and the second connecting pipe 1211 and the first plate 123 are an integral structure. The second connecting pipe 1211 is inserted into the mounting hole 1112, and can be either spaced apart from or fitted to the inner wall of the mounting hole 1112. The second connector 1211 can be of various shapes, such as a cylindrical short pipe or other irregularly shaped short pipe. Understandably, the second connector 1211 is adapted to the size and shape of the first connector 312. The second connector 1211 can be made of various materials, such as aluminum alloy, magnesium alloy, stainless steel, engineering plastics, etc.

[0099] The second seal 33 is a sealing element used to fill the minute gap between the contact interface of the first connector 312 and the second connector 1211 to form a reliable sealing structure. Optionally, the second seal 33 can be an elastic sealing element, such as a sealing ring made of an elastic material; the second seal 33 can be compressed in the radial direction to undergo elastic deformation, thereby filling the minute gap between the first connector 312 and the second connector 1211 to form a reliable sealing structure.

[0100] As an example, the mounting plate 111 is provided with mounting holes 1112. The first connecting pipe 312 and the second connecting pipe 1211 are inserted into the mounting holes 1112 from different sides, with a gap between the second connecting pipe 1211 and the mounting holes 1112. The first connecting pipe 312 is inserted into the second connecting pipe 1211. The outer wall of the first connecting pipe 312 is provided with multiple annular grooves, and the second sealing member 33 includes multiple sealing rings disposed in the multiple annular grooves.

[0101] In the above embodiments, the connecting joint 31 and the heat exchange plate 12 are connected by two short connecting pipes, which is simple in structure and easy to disassemble and assemble. At the same time, a second sealing element 33 is provided between the first connecting pipe 312 and the second connecting pipe 1211, which helps to improve the connection sealing between the connecting joint 31 and the heat exchange plate 12, thereby reducing the risk of coolant leakage.

[0102] Understandably, since the mounting plate 111 is sealed to the protrusion 121, in some other embodiments, a flow channel can be directly provided in the mounting plate 111 to achieve communication between the connecting joint 31 and the heat exchange channel 122 in the heat exchange plate 12.

[0103] In some embodiments, please refer to Figure 6 and Figure 8 The frame 11 includes multiple mounting plates 111, and the connector assembly 30 includes multiple connecting connectors 31, which are respectively assembled on different mounting plates 111.

[0104] Multiple mounting plates 111 can be located on the same side or different sides of the housing 10; for example, the housing 10 can be a cuboid, and the mounting plates 111 can be located on the front, rear, left and right sides of the housing 10. Specifically, the design can be based on the arrangement of the heat exchange plates 12 and the structure of the heat exchange channels 122 inside the heat exchange plates 12.

[0105] As an example, the front side of the housing 10 is provided with two independent mounting plates 111, and the two mounting plates 111 are spaced apart. The connector assembly 30 includes a liquid inlet connector 31 and a liquid outlet connector 31, which are respectively mounted on the two mounting plates 111.

[0106] In the above embodiments, by distributing multiple connecting joints 31 on different mounting plates 111, the vibration intensity of the assembly area of ​​the connecting joints 31 can be reduced, thereby helping to reduce the risk of sealing failure of the housing 10. At the same time, this design is more flexible and can meet the design requirements of various heat exchange plates 12 and battery devices 100.

[0107] In some embodiments, please refer to Figure 4 and Figure 5 The frame 11 includes a frame body 112, and the mounting plate 111 and the frame body 112 are integrally formed.

[0108] As an example, the frame body 112 can be a circular ring structure, including a curved side beam 1122 connected end to end, and a mounting plate 111 is connected to the outer wall of the side beam 1122, with the mounting plate 111 and the side beam 1122 integrally formed.

[0109] As an example, the frame body 112 can be a rectangular ring structure, including end beams 1121 and side beams 1122 connected in sequence. The end beams 1121 are structural beams arranged on the front and rear sides of the box body 10 and extending along the width direction of the box body 10, while the side beams 1122 are structural beams arranged on the left and right sides of the box body 10 and extending along the length direction of the box body 10. The end beams 1121 and side beams 1122 are vertically connected. A mounting plate 111 can be connected to the outer wall of the end beams 1121 or side beams 1122, and the mounting plate 111, end beams 1121, and side beams 1122 are integrally formed.

[0110] In the above embodiments, the mounting plate 111 and the frame body 112 are designed as an integral structure, which is beneficial to improving the structural strength and impact resistance of the frame 11, thereby improving the reliability of the box 10 and the battery device 100.

[0111] It is understood that in some other embodiments, the mounting plate 111 and the frame body 112 may be separate structures, which are fixedly connected by welding, adhesive bonding or other methods.

[0112] In some embodiments, the mounting plate 111 and the frame body 112 are integrally die-cast.

[0113] There are no restrictions; reinforcing ribs, bosses, slots, and other structures can be freely designed on the frame body 112 according to the design requirements of the battery device 100.

[0114] In the above embodiments, the die casting process has a high degree of design freedom and production efficiency. At the same time, the frame 11 made by die casting has good structural performance and high reliability.

[0115] In some embodiments, the mounting plate 111 and the protrusion 121 are connected by brazing.

[0116] Brazing is a process in which a filler metal with a melting point lower than that of the base metal is heated to its melting temperature and then filled into the tiny gap between two workpieces, forming a strong metallurgical bond after cooling.

[0117] The brazing process not only achieves a sealed connection between the mounting plate 111 and the protrusion 121, but also enhances the overall strength of the combined structure, thereby further improving the reliability of the housing 10 and the battery device 100.

[0118] Understandably, in some embodiments, the mounting plate 111 and the protrusion 121 can also be connected, fixed and sealed by means of adhesive or other methods.

[0119] In some embodiments, please refer to Figure 8 The housing 10 also includes a bottom guard plate 13, which is located on the side of the heat exchange plate 12 away from the frame 11.

[0120] The bottom protective plate 13 refers to the protective structure of the housing 10. Specifically, the bottom protective plate 13 covers the outside of the heat exchange plate 12 to form a physical barrier to prevent external foreign objects from impacting or corroding the heat exchange plate 12. The bottom protective plate 13 can be fixed to the frame 11 by bolts, snap-fit ​​connections, welding, or other methods, or it can be directly connected to the heat exchange plate 12. The bottom protective plate 13 can be made of materials with high mechanical strength, such as aluminum alloy, stainless steel, engineering plastics, etc.

[0121] In the above embodiments, the bottom protective plate 13 can provide reliable mechanical protection for the heat exchange plate 12, reduce the risk of accidental damage to the heat exchange plate 12, and thus help improve the reliability of the housing 10 and the battery device 100.

[0122] In some embodiments, please refer to Figure 4 and Figure 6 The housing 10 also includes a cover plate 14, which covers the opening on the side of the frame 11 away from the heat exchange plate 12.

[0123] The cover plate 14 is a component used to cooperate with the frame 11 and the heat exchange plate 12 to form the internal environment of the housing 10. The cover plate 14, the frame 11, and the heat exchange plate 12 can together enclose a closed housing space for accommodating the battery cells 20. The cover plate 14 and the frame body 112 can be separate structures, and can be connected and fixed by welding, gluing, snap-fit ​​connection, bolt connection, etc. In some cases, the cover plate 14 and the frame 11 can also be an integrally formed structure and together form the upper housing 10. The cover plate 14 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, magnesium alloy, hard metal, or other strong materials.

[0124] In one specific embodiment provided in this application, the battery device 100 includes a housing 10, a battery cell 20 housed within the housing 10, and a connector assembly 30 externally disposed on the housing 10. The housing 10 includes a cover plate 14, a frame 11, and a heat exchange plate 12. The cover plate 14 and the heat exchange plate 12 respectively cover the openings on both sides of the frame 11, and the cover plate 14, the frame 11, and the heat exchange plate 12 together form a housing space for accommodating the battery cell 20. The frame 11 includes a frame body 112 and a mounting plate 111 connected to the outside of the frame body 112. The frame body 112 and the mounting plate 111 are integrally formed by a die-casting process. The heat exchange plate 12 is connected to the bottom of the frame body 112 and includes a protrusion 121 extending to the outside of the housing 10. The upper surface of the protrusion 121 is fitted to the lower surface of the mounting plate 111 and is sealed by brazing. The connector assembly 30 includes a connecting connector 31 and a sealing ring 321. The connecting connector 31 is mounted on the mounting plate 111. The connecting connector 31 includes a main flange 311, which abuts against the mounting plate 111. The lower surface of the main flange 311 and the upper surface of the mounting plate 111 are provided with opposing annular grooves. The sealing ring 321 is disposed in the annular groove.

[0125] In summary, the battery device 100 provided in this application improves the sealing reliability of the housing 10 by setting a double sealing structure in the water-cooled connector assembly area, and effectively reduces the risk of sealing failure of the housing 10.

[0126] An embodiment of the second aspect of this application provides an electrical device including the battery device 100 of the first aspect, the battery device 100 being used to store or provide electrical energy.

[0127] The electrical equipment provided in this application embodiment can effectively improve the reliability of the electrical equipment by adopting the battery device 100 of the first aspect.

[0128] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A battery device, characterized by, The battery device comprises: a box body comprising a frame and a heat exchange plate, the frame comprising a mounting plate located outside the box body, the mounting plate being a solid panel, the heat exchange plate being provided with a protruding portion extending to the outside of the box body, the mounting plate being in abutment with the protruding portion and being sealingly connected therewith; a joint assembly comprising a connecting joint and a first sealing member, the connecting joint being fitted on the mounting plate and being in communication with a heat exchange channel inside the heat exchange plate, the first sealing member being provided between the connecting joint and the mounting plate; a battery cell accommodated inside the box body.

2. The battery device of claim 1, wherein The connecting joint comprises a main flange abutting against the mounting plate, a surface of the main flange and / or the mounting plate being provided with an annular groove, the first sealing member being at least partially accommodated in the annular groove.

3. The battery device of claim 2, wherein The annular groove comprises a first annular groove provided on the main flange and a second annular groove provided on the mounting plate, the first annular groove being oppositely arranged with the second annular groove, the first sealing member being accommodated in the first annular groove and the second annular groove.

4. The battery device of claim 2, wherein The mounting plate is provided with a mounting hole, the connecting joint comprises a first connecting pipe connected to the main flange, the first connecting pipe being inserted into the mounting hole, the first connecting pipe being connected to the protruding portion and being in communication with the heat exchange channel.

5. The battery device of claim 4, wherein The protruding portion is provided with a second connecting pipe in communication with the heat exchange channel, the second connecting pipe being inserted into the mounting hole and being in plug-in cooperation with the first connecting pipe, the joint assembly further comprising a second sealing member provided between the first connecting pipe and the second connecting pipe.

6. The battery device of claim 1, wherein The first sealing member comprises a sealing ring or a sealing gasket.

7. The battery device of any one of claims 1-6, wherein, The frame comprises a plurality of mounting plates, the joint assembly comprises a plurality of connecting joints, the plurality of connecting joints being respectively fitted on different mounting plates.

8. The battery device of any one of claims 1-6, wherein, The frame comprises a frame body, the mounting plate and the frame body being in an integral molding structure.

9. The battery device of claim 8, wherein, The mounting plate and the frame body are integrally formed by die casting.

10. The battery device of any one of claims 1-6, wherein, The mounting plate and the protruding portion are sealingly connected by brazing.

11. An electrical device, characterized by The battery device as claimed in any one of claims 1-10 is used for storing or providing electric energy.

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