Battery device and electric device

Abstract

This application discloses a battery device and an electrical device. The battery device includes: a housing with a first through hole; a connecting plate with a second through hole; one end of a heat exchange pipe located inside a receiving cavity, and the other end extending out to the outside of the housing through the first and second through holes in sequence, with the heat exchange pipe sealed to the connecting plate; a heat exchange connector fixed to the connecting plate and located on the side of the connecting plate away from the housing, the heat exchange connector having a connection hole, the other end of the heat exchange pipe being inserted into the connection hole; the heat exchange connector including: a first sealing element, a cavity defined between the first sealing element, the inner wall surface of the connection hole, and the heat exchange pipe, and in the axial direction of the first sealing element, the cavity is located on the side of the first sealing element facing the connecting plate; the heat exchange connector and / or the connecting plate are provided with a first drain channel, one end of the first drain channel communicating with the cavity, and the other end communicating with the external space. According to the battery device provided in this application, the probability of leaked liquid entering the housing can be effectively reduced.

Description

Technical Field

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

[0002] In existing technologies, to ensure the safe operation of power batteries, a cooling system is typically installed inside the battery. Currently, there are various cooling methods for power battery packs, such as air cooling and liquid cooling. Among them, liquid cooling is the mainstream method. Since the coolant needs to circulate in pipelines inside and outside the battery pack, liquid cooling connectors are usually installed for better management. Currently, to reduce the space occupied by the liquid cooling connectors, they are generally located on the outside of the battery pack. This raises the issue of sealing and connecting the liquid cooling connectors that pass through the battery pack. Currently, the liquid cooling connectors and the battery pack often use sealing rings. Therefore, when the seal of the liquid cooling connector fails, high-pressure coolant will directly seep into the battery pack, potentially causing a short circuit in the high-voltage electrical connections. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a battery device that can effectively reduce the probability of leaked liquid entering the casing at the connection point between the heat exchange joint and the heat exchange pipe, thereby reducing the risk of short circuits in individual battery cells.

[0004] This application also proposes an electrical device having the above-mentioned battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, comprising: a housing with an internal cavity and a first through hole; a connecting plate disposed on the outside of the housing and fixedly connected to it, the connecting plate having a second through hole; a heat exchange pipe, one end of which is located within the cavity, and the other end extending through the first and second through holes to the outside of the housing, the heat exchange pipe being sealed to the connecting plate; and a heat exchange connector fixed to the connecting plate and located on the side of the connecting plate away from the housing. The head has a connection hole, and the other end of the heat exchange tube is inserted into the connection hole. The heat exchange joint includes: a first sealing element, which extends in a ring shape around the circumference of the heat exchange tube and seals against the radial outer side of the heat exchange tube and the inner wall surface of the connection hole. A cavity is defined between the first sealing element, the inner wall surface of the connection hole and the heat exchange tube. In the axial direction of the first sealing element, the cavity is located on the side of the first sealing element facing the connecting plate. The heat exchange joint and / or the connecting plate are provided with a first drain channel. One end of the first drain channel communicates with the cavity and the other end communicates with the external space.

[0006] In the above technical solution, by setting a connecting plate and a first drain channel, the probability of leaked liquid at the connection position of the heat exchange joint and the heat exchange pipe entering the box body through the first through hole can be effectively reduced, thereby reducing the risk of short circuit of battery cells caused by coolant leakage, and thus improving the reliability of the battery device.

[0007] In some embodiments, a recessed first drain groove is formed on the side surface of the heat exchange joint facing the connecting plate. One end of the first drain groove is connected to the cavity, and the other end of the first drain groove penetrates the edge of the heat exchange joint. The inner wall of the first drain groove and the connecting plate together define a first drain channel. And / or, a recessed second drain groove is formed on the side surface of the connecting plate facing the heat exchange joint. One end of the second drain groove is connected to the cavity, and the other end of the second drain groove penetrates the edge of the connecting plate. The inner wall of the second drain groove and the heat exchange joint together define a first drain channel.

[0008] In the above technical solution, by forming a recessed first drain groove on the side surface of the heat exchange joint facing the connecting plate, and / or forming a recessed second drain groove on the side surface of the connecting plate facing the heat exchange joint, it is possible to ensure that the leaked coolant can be discharged inside the heat exchange joint, while also simplifying the manufacturing difficulty of the first drain channel, thereby reducing the manufacturing cost of the entire battery device.

[0009] In some embodiments, one of the connecting plate and the heat exchanger is formed as a first positioning protrusion and the other is formed as a positioning groove, with the first positioning protrusion fitting into the positioning groove.

[0010] In the above technical solution, by setting the first positioning protrusion and positioning groove, the assembly convenience and assembly speed of the connecting plate and the heat exchange joint can be improved, thereby improving the assembly speed of the entire battery device.

[0011] In some embodiments, both the first positioning protrusion and the positioning groove extend in a ring shape along the circumference of the second through hole.

[0012] In the above technical solution, by setting both the first positioning protrusion and the positioning groove to extend in a ring shape along the circumference of the second through hole, the assembly accuracy of the connecting plate and the heat exchange joint can be further improved.

[0013] In some embodiments, a first positioning protrusion is formed on the connecting plate, and a positioning groove is formed on the heat exchange joint. The positioning groove is open to one side of the cavity so as to communicate with the cavity, and one end of the first drain channel is connected to the cavity through the positioning groove.

[0014] In the above technical solution, a first positioning protrusion is formed on the connecting plate, and a positioning groove is formed on the heat exchange joint. The positioning groove is open to one side of the cavity so as to communicate with the cavity. One end of the first drain channel is connected to the cavity through the positioning groove. This allows the positioning groove to not only position the connecting plate, but also guide the leaked liquid. In this way, the presence of additional positioning parts or guide pipes can be reduced, thereby improving the compactness of the structure and the manufacturing cost of the structure.

[0015] In some embodiments, a recessed second drain groove is formed on the side surface of the connecting plate facing the heat exchange joint. The inner wall of the second drain groove and the side surface of the heat exchange joint facing the connecting plate together define the first drain channel. In the projection plane perpendicular to the axis of the second through hole, one end of the second drain groove is located in the projection of the positioning groove, and the other end of the second drain groove extends to the edge of the connecting plate.

[0016] In the above technical solution, by forming a recessed second drain groove on the side surface of the connecting plate facing the heat exchange joint, the manufacturing cost of the entire connecting plate can be reduced, thereby reducing the manufacturing cost of the entire battery device.

[0017] In some embodiments, a second seal is formed on the side of the connecting plate facing the housing. The second seal extends circumferentially around the second through hole in an annular shape and seals against the connecting plate and the housing.

[0018] In the above technical solution, by setting a second sealing element, the connection plate and the box can be sealed, thereby effectively preventing dust, water and other impurities from entering the box through the gap between the connection plate and the box, thus improving the sealing performance of the box and the reliability of the battery device.

[0019] In some embodiments, a recessed first limiting groove is formed on the side of the connecting plate facing the housing. The first limiting groove extends in an annular shape around the second through hole, and the second seal is arranged in the first limiting groove.

[0020] In the above technical solution, by setting the first limiting groove, the installation position of the second seal can be limited, thereby improving the assembly efficiency of the second seal and thus improving the assembly efficiency of the battery device; at the same time, the compression ratio of the second seal can also be limited, so that the second seal can achieve the sealing effect while ensuring the service life of the sealing strip.

[0021] In some embodiments, a second drainage channel is formed on the connecting plate and / or the housing. The second drainage channel is arranged on the side of the first limiting groove away from the second through hole. One end of the second drainage channel is connected to the first limiting groove, and the other end is connected to the external space.

[0022] In the above technical solution, by setting a second drainage channel, the liquid in the first limiting groove can be discharged in time, thereby effectively preventing the long-term accumulation of external liquid from corroding the second seal and improving the service life and sealing effect of the second seal. At the same time, it can further reduce the risk of external liquid entering the inside of the housing from the second seal, thereby improving the reliability of the battery device.

[0023] In some embodiments, a recessed third drain groove is formed on the side surface of the housing facing the connecting plate. One end of the third drain groove is connected to the first limiting groove, and the other end of the third drain groove extends beyond the edge of the connecting plate in the projection plane perpendicular to the axis of the second through hole. The inner wall of the third drain groove and the connecting plate together define the second drain channel. And / or, a recessed fourth drain groove is formed on the side surface of the connecting plate facing the housing. One end of the fourth drain groove is connected to the first limiting groove, and the other end of the fourth drain groove extends through the edge of the connecting plate. The inner wall of the fourth drain groove and the housing together define the second drain channel.

[0024] In the above technical solution, by forming a recessed third drain groove on the side surface of the housing facing the connecting plate, and / or forming a recessed fourth drain groove on the side surface of the connecting plate facing the housing, it is possible to ensure that the liquid in the first limiting groove is discharged in time, while also simplifying the manufacturing difficulty of the second drain channel, thereby reducing the manufacturing cost of the entire battery device.

[0025] In some embodiments, a third sealing element is provided in the second through hole. The third sealing element extends in an annular shape around the circumference of the second through hole and seals against the inner wall of the second through hole and the outer peripheral wall of the heat exchange pipe.

[0026] In the above technical solution, by setting a third seal, it is possible to prevent the liquid leaking from the connection between the heat exchange pipe and the heat exchange joint from flowing into the box along the outer peripheral wall of the heat exchange pipe, thereby preventing internal short circuits or damage to battery cells.

[0027] In some embodiments, the second through hole includes: a first hole section and a second hole section, the first hole section being connected to the side of the second hole section facing the heat exchange joint, the cross-sectional dimension of the first hole section being larger than the cross-sectional dimension of the second hole section, and a third seal being disposed within the first hole section.

[0028] In the above technical solution, by setting the second through hole including: a first hole section and a second hole section, the cross-sectional size of the first hole section is larger than that of the second hole section, and the third sealing element is arranged in the first hole section, the second through hole itself can play a certain role in stopping and positioning the sealing element, which can facilitate the assembly of the third sealing element, effectively improve the assembly stability of the third sealing element, and reduce the use of parts, thereby reducing the production cost of the entire battery device.

[0029] In some embodiments, the battery device further includes a first stop member disposed within a first bore and located on the side of the third seal facing the heat exchange joint.

[0030] In the above technical solution, by setting the first stop, the third seal can be effectively prevented from coming out of the opening of the first hole section, thereby further improving the assembly stability and sealing effect of the third seal.

[0031] In some embodiments, a latching protrusion is formed on one of the inner walls of the first stop and the first hole segment, and a latching groove is formed on the other. The latching protrusion engages with the latching groove to make the first stop snap-fit ​​connection with the connecting plate.

[0032] In the above technical solution, by setting the first stop and the connecting plate to be connected, the installation and disassembly of the first stop can be facilitated. At the same time, when the third seal is to be installed or replaced, only the first stop needs to be disassembled to realize the installation and replacement of the third seal, thereby improving the maintenance speed of the third seal.

[0033] In some embodiments, the connecting plate has a second positioning protrusion that extends in a ring shape along the circumference of the second through hole and is positioned and fitted within the first through hole.

[0034] In the above technical solution, by setting a second positioning protrusion, the connecting plate can be pre-positioned when it is fixed to the box, thereby improving the assembly accuracy of the connecting plate and the box. At the same time, it can also reduce the difficulty of connecting the connecting plate and the box and increase the assembly speed of the connecting plate and the box.

[0035] In some embodiments, the battery device further includes: a fixing member disposed within the receiving cavity, the fixing member being fastened to the housing by fasteners, and one end of the heat exchange pipe being fixed to the fixing member.

[0036] In the above technical solution, by setting a fastener to fix the heat exchange pipe to the box, the vibration force transmitted to the heat exchange pipe can be effectively reduced, thereby reducing the risk of breakage at the connection between the heat exchange pipe and the heat exchange component, and thus improving the reliability of the heat exchange structure.

[0037] In some embodiments, the position of the fastener relative to the housing is adjustable.

[0038] In the above technical solution, by setting the position of the fixing component relative to the housing to be adjustable, the assembly tolerance between the heat exchange pipe, heat exchange joint, and connecting plate and the housing can be increased, thereby reducing the hard connection of the battery device during the assembly process, reducing the probability of damage to parts during the assembly process, and thus improving the reliability of the battery device assembly.

[0039] In some embodiments, a mounting hole is formed on the fastener, and the fastener is clearance-fitted into the mounting hole.

[0040] In the above technical solution, the fastener has mounting holes, and the fasteners are clearance-fitted into the mounting holes, allowing the fasteners to wiggle relative to the fasteners. This makes the position of the fasteners relative to the housing adjustable. Since the fasteners are fixed to one end of the heat exchange pipe, while the other end of the heat exchange pipe extends out of the receiving cavity and assembles with the heat exchange joint and the connecting plate, the clearance fit of the fasteners into the mounting holes increases the assembly tolerance between the heat exchange pipe, the heat exchange joint, the connecting plate, and the housing. This reduces hard connections during battery assembly, lowers the probability of component damage during battery assembly, and thus improves the reliability of battery assembly.

[0041] In some embodiments, the battery device further includes a sleeve fitted onto a fastener and clearance-fitted into a mounting hole.

[0042] In the above technical solution, by setting a sleeve, the fastener can be protected to a certain extent, the wear rate of the fastener can be reduced, and the risk of fastener breakage during installation can be reduced, thereby improving the reliability of the battery device.

[0043] In some embodiments, the sleeve includes: a first ring portion, which is sleeved and fixed on the outside of the fastener, the first ring portion is disposed in the mounting hole and is clearance-fitted with the mounting hole; and a second ring portion, one end of which is connected to the first ring portion, the other end of which extends outward along the radial direction of the mounting hole, and in the axial direction of the mounting hole, the second ring portion is clearance-fitted between the head of the fastener and the fixing member.

[0044] In the above technical solution, by setting the sleeve to include a first ring and a second ring, with the first ring fitting with the mounting hole and the second ring fitting with the head of the fastener and the fixing part, hard connections can be further reduced, thereby further reducing the probability of component damage during battery assembly and improving the reliability of battery assembly.

[0045] In some embodiments, the heat exchange pipe and the fixing element are integrally formed.

[0046] In the above technical solution, by setting the heat exchange pipe and the fastener to be integrally molded, the assembly steps of the box can be simplified, thereby increasing the assembly speed of the box and reducing labor costs.

[0047] In some embodiments, there are two heat exchange joints, with heat exchange pipes and connecting plates corresponding one-to-one with the heat exchange joints.

[0048] In the above technical solution, by setting two heat exchange joints, with the heat exchange pipe and connecting plate corresponding one-to-one with the heat exchange joint, the liquid inlet and outlet can be made to not interfere with each other. At the same time, if one of them is damaged, only the corresponding damaged part needs to be replaced and repaired. In this way, the maintenance cost of the entire battery device can be reduced.

[0049] In some embodiments, the battery device further includes a second stop member disposed within the cavity and located on the side of the first seal member facing the connecting plate.

[0050] In the above technical solution, by setting a second stop, the first seal can be effectively prevented from coming out of the opening of the connection hole, thereby further improving the assembly stability and sealing effect of the first seal.

[0051] Secondly, embodiments of this application also provide an electrical device, including a battery device according to the first aspect of this application.

[0052] In the above technical solution, by setting the battery device of the first aspect embodiment, the overall performance of the power-consuming device is improved.

[0053] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of a vehicle according to an embodiment of this application;

[0055] Figure 2 This is a schematic diagram of a battery device according to an embodiment of this application;

[0056] Figure 3 This is a schematic diagram of a battery device according to another embodiment of this application;

[0057] Figure 4 yes Figure 3 A partial cross-sectional view of the battery device shown;

[0058] Figure 5 yes Figure 4 Enlarged view of point A circled in the image;

[0059] Figure 6 This is a partial cross-sectional view of a battery device according to another embodiment of this application;

[0060] Figure 7 yes Figure 6 Enlarged view of point B circled in the image;

[0061] Figure 8 yes Figure 3A partial schematic diagram of the battery device shown from another angle;

[0062] Figure 9 yes Figure 8 A schematic diagram of one angle of the connecting plate shown;

[0063] Figure 10 yes Figure 8 A schematic diagram of the connecting plate from another angle;

[0064] Figure 11 yes Figure 8 A schematic diagram of the connecting plate shown from another angle;

[0065] Figure 12 It is along Figure 11 The cross-sectional view of line AA shown;

[0066] Figure 13 yes Figure 3 A partial cross-sectional view of the battery device shown from another angle;

[0067] Figure 14 yes Figure 13 Enlarged view of point C circled in the image;

[0068] Figure 15 This is a partial cross-sectional view of a battery device according to yet another embodiment of this application;

[0069] Figure 16 yes Figure 15 The enlarged view of point D circled in the image.

[0070] Figure label:

[0071] 1000, vehicles;

[0072] 100. Battery device;

[0073] 10. Box body; 11. Receiving cavity; 12. First through hole; 13. First box body; 14. Second box body;

[0074] 20. Connecting plate; 21. Second through hole; 211. First hole section; 212. Second hole section; 213. Slot; 22. Second drain groove; 23. First positioning protrusion; 24. First limiting groove; 25. Fourth drain groove; 26. Second positioning protrusion; 27. Third drain groove; 28. First drain groove;

[0075] 30. Heat exchanger nozzle;

[0076] 40. Heat exchanger joint; 41. Positioning groove; 42. Cavity; 43. First seal; 44. Second stop;

[0077] 51. Second seal; 52. Third seal;

[0078] 60. First stop; 61. Bracket;

[0079] 70. Fastener; 71. Mounting hole; 81. Fastener; 82. Sleeve; 821. First ring; 822. Second ring;

[0080] 90. Battery cell;

[0081] 200, controller; 300, motor. Detailed Implementation

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0087] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0088] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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.

[0089] 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.

[0090] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage 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 aerospace and other fields. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0091] In existing technologies, to ensure the safe operation of power batteries, a cooling system is typically installed inside the battery. Currently, there are various cooling methods for power battery packs, such as air cooling and liquid cooling. Among them, liquid cooling is the mainstream method. Since the coolant needs to circulate in pipelines inside and outside the battery pack, liquid cooling connectors are usually installed for better management. Currently, to reduce the space occupied by the liquid cooling connectors, they are generally located on the outside of the battery pack. This raises the issue of sealing and connecting the liquid cooling connectors that pass through the battery pack. Currently, the liquid cooling connectors and the battery pack often use sealing rings. Therefore, when the seal of the liquid cooling connector fails, high-pressure coolant will directly seep into the battery pack, potentially causing a short circuit in the high-voltage electrical connections.

[0092] Based on the above considerations, in order to solve the problem of short circuits in high-voltage electrical connections caused by high-pressure coolant directly seeping into the battery pack when the water-cooled connector seal fails, embodiments of this application provide a battery device. This battery device includes: a housing, a connecting plate, a heat exchange pipe, and a heat exchange connector. The housing forms a receiving cavity inside and has a first through hole. The connecting plate is arranged on the outside of the housing and fixedly connected to it, and has a second through hole. One end of the heat exchange pipe is located inside the receiving cavity, and the other end extends out to the outside of the housing through the first and second through holes in sequence, and the heat exchange pipe is sealed to the connecting plate. The heat exchange connector is fixed to the connecting plate, and... Located on the side of the connecting plate away from the housing, the heat exchange joint has a connection hole, and the other end of the heat exchange pipe is inserted into the connection hole. The heat exchange joint includes: a first sealing element, which extends in a ring shape around the circumference of the heat exchange pipe and seals against the radial outer side of the heat exchange pipe and the inner wall surface of the connection hole. A cavity is defined between the first sealing element, the inner wall surface of the connection hole, and the heat exchange pipe. In the axial direction of the first sealing element, the cavity is located on the side of the first sealing element facing the connecting plate. The other end of the heat exchange pipe is connected to the cavity. The heat exchange joint and / or the connecting plate are provided with a first drainage channel, one end of which communicates with the cavity and the other end of which communicates with the external space. The connecting plate serves as an isolation element, separating the heat exchange joint from the first through hole. This reduces the likelihood of leaked liquid directly entering the casing through the first through hole if the first seal fails and leaks occur at the connection between the heat exchange joint and the heat exchange pipe. Furthermore, it allows leaked liquid accumulated in the cavity to drain through the first drainage channel, preventing accumulation within the cavity and at the connection between the heat exchange joint and the connecting plate. This prevents seal failure at the connection between the connecting plate and the heat exchange pipe due to excessive water pressure, thus reducing the risk of short circuits in individual battery cells caused by leakage from the first through hole into the casing.

[0093] The battery device disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0094] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0095] Reference Figure 1 , Figure 1This is a schematic diagram 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. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is disposed 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.

[0096] 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.

[0097] Reference Figure 2 , Figure 2 This is a schematic diagram of a battery device 100 according to some embodiments of this application. The battery device 100 includes a housing 10 and a battery cell 90. The housing 10 has a cavity, and the battery cell 90 is accommodated within the cavity of the housing 10. The housing 10 provides a space for accommodating the battery cell 90, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first part (e.g., a first housing 13 as described below) and a second part (e.g., a second housing 14 as described below), the first housing 13 and the second housing 14 being connected to jointly define a receiving cavity 11 for accommodating the battery cell 90. The first housing 13 may be a hollow structure with one end open, and the second housing 14 may be a plate-like structure, the second housing 14 covering the open side of the first housing 13 to close the open side of the first housing 13; the first housing 13 and the second housing 14 may also both be hollow structures with one side open, the open side of the first housing 13 covering the open side of the second housing 14. Of course, the box 10 formed by the first box 13 and the second box 14 can be of various shapes, such as cylinder, cuboid, etc.

[0098] In the battery device 100, there can be multiple battery cells 90, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 90 are connected in both series and parallel connections. Multiple battery cells 90 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 90 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 90 first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 90.

[0099] Each battery cell 90 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 90 can be cylindrical, flat, cuboid, or other shapes.

[0100] The following is for reference. Figures 3-16 A battery device 100 according to an embodiment of the first aspect of this application is described. Figure 3 This is a partial schematic diagram of a battery device 100 according to other embodiments of this application; Figure 4 yes Figure 3 A partial cross-sectional view of the battery device 100 shown. Figure 5 yes Figure 4 The enlarged view of point A circled in the image. Figure 6 This is a partial cross-sectional view of a battery device 100 according to another embodiment of this application. Figure 7 yes Figure 6 Enlarged view of point B circled in the image; Figure 8 yes Figure 3 A partial schematic diagram of the battery device 100 shown from another angle. Figures 9-11 yes Figure 8 A schematic diagram of the connecting plate 20 shown. Figure 12 It is along Figure 11 The cross-sectional view of line AA shown. Figure 13 yes Figure 3 A partial cross-sectional view of the battery device 100 shown from another angle. Figure 14 yes Figure 13 The enlarged view of point C circled in the image. Figure 15 This is a partial cross-sectional view of a battery device 100 according to another embodiment of this application; Figure 16 yes Figure 15 The enlarged view of point D circled in the image.

[0101] Embodiments of this application provide a battery device 100, with reference to... Figures 3-7The battery device 100 includes: a housing 10, a connecting plate 20, a heat exchange pipe 30, and a heat exchange connector 40. The housing 10 has an internal cavity 11 and a first through hole 12. The connecting plate 20 is located on the outside of the housing 10 and fixedly connected to it, and has a second through hole 21. One end of the heat exchange pipe 30 is located inside the cavity 11, and the other end extends out to the outside of the housing 10 through the first through hole 12 and the second through hole 21, and the heat exchange pipe 30 is sealed to the connecting plate 20. The heat exchange connector 40 is fixed to the connecting plate 20 and located on the side of the connecting plate 20 away from the housing 10. The heat exchange connector 40 has a connection hole for heat exchange. The other end of the connecting pipe 30 is inserted into the connecting hole. The heat exchange joint 40 includes: a first sealing member 43, which extends in a ring shape around the circumference of the heat exchange connecting pipe 30 and seals against the radial outer side of the heat exchange connecting pipe 30 and the inner wall surface of the connecting hole. A cavity 42 is defined between the first sealing member 43, the inner wall surface of the connecting hole and the heat exchange connecting pipe 30. In the axial direction of the first sealing member 43, the cavity 42 is defined between the inner wall surface of the connecting hole on the side of the first sealing member 43 facing the connecting plate 20. The heat exchange joint 40 and / or the connecting plate 20 are provided with a first drainage channel. One end of the first drainage channel is connected to the cavity 42 and the other end is connected to the external space.

[0102] The housing 10 is the main load-bearing component of the battery pack, which mainly provides load-bearing space for multiple battery cells 90. At the same time, it can be used to protect the battery cells 90 and prevent dust, sewage and other impurities from entering the housing cavity 11 and damaging the battery cells 90.

[0103] One end of the heat exchange pipe 30 is connected to the heat exchange element arranged inside the housing 10, and the other end is connected to an external pipe to provide coolant to the heat exchange element and discharge the coolant after heat exchange in the heat exchange element. For example, there can be two heat exchange pipes 30, one of which is an inlet pipe and the other is an outlet pipe.

[0104] The heat exchange joint 40 is mainly used to connect the heat exchange pipe 30 to the external pipe to control the flow rate and velocity entering or exiting the heat exchanger. For example, there can be two heat exchange joints 40, one of which is a liquid inlet joint and the other is a liquid outlet joint, wherein the liquid inlet joint is connected to the liquid inlet pipe and the liquid outlet joint is connected to the liquid outlet pipe.

[0105] Specifically, the phrase "heat exchange joint 40 is fixed to connecting plate 20 and located on the side of connecting plate 20 away from housing 10" indicates that the heat exchange joint 40 is arranged on the outside of housing 10 and on the side of connecting plate 20 away from housing 10. This ensures that when a leak occurs at the connection point between heat exchange joint 40 and heat exchange pipe 30, the coolant will not leak directly into the receiving cavity 11, effectively reducing the probability of damage to the battery cell 90 due to coolant leakage. Simultaneously, the connecting plate 20 also provides a certain degree of isolation, isolating the heat exchange joint 40 from the first through hole 12. Therefore, when the first seal 43 fails, causing a leak at the connection point between heat exchange joint 40 and heat exchange pipe 30, the presence of the connecting plate 20 effectively reduces the probability of leaked liquid directly entering the housing 10 through the first through hole 12. It should be noted that the connecting plate 20 can be made of various materials, such as PA66+30%GF injection molding material, aluminum, steel, and other metal materials; no limitation is made here.

[0106] The phrase "heat exchanger 40 and / or connecting plate 20 are provided with a first drainage channel" means that, in this embodiment, the first drainage channel may be provided only on the heat exchanger 40, only on the connecting plate 20, or on both the connecting plate 20 and the heat exchanger 40; no limitation is made here. For example, the first drainage channel in this embodiment may be a drainage trough, a drainage pipe, or other forms of structure; no limitation is made here.

[0107] The phrase "one end of the first drain channel is connected to the cavity 42, and the other end is connected to the external space" is intended to indicate that when the failure of the first seal 43 causes leakage at the connection between the heat exchange joint 40 and the heat exchange pipe 30, the leaked liquid stored in the cavity 42 can be discharged in time through the first drain channel, and will not accumulate in the cavity 42 or at the connection between the heat exchange joint 40 and the connecting plate 20. This can prevent the sealing failure at the connection between the connecting plate 20 and the heat exchange pipe 30 caused by excessive water pressure, thereby reducing the problem of short circuit of the battery cell 90 caused by leakage from the first through hole 12 into the housing 10.

[0108] It should be noted that the first sealing element 43 can be a sealing ring or a sealant; there is no limitation here.

[0109] In the above technical solution, by setting the connecting plate 20 and the first drain channel, the probability of leakage liquid at the connection position of the heat exchange joint 40 and the heat exchange pipe 30 entering the inside of the housing 10 through the first through hole 12 can be effectively reduced, thereby reducing the risk of short circuit of the battery cell 90 caused by coolant leakage, and thus improving the reliability of the battery device 100.

[0110] In some embodiments, such as Figure 7 As shown, a recessed first drain groove 28 is formed on the side surface of the heat exchange joint 40 facing the connecting plate 20. One end of the first drain groove 28 is connected to the cavity 42, and the other end of the first drain groove 28 passes through the edge of the heat exchange joint 40. The inner wall of the first drain groove 28 and the connecting plate 20 together form a first drain channel.

[0111] It is understandable that when the failure of the first seal 43 causes leakage at the connection between the heat exchange joint 40 and the heat exchange pipe 30, the leaked coolant can be discharged through the first drain groove 28. The groove has a relatively simple structure, which simplifies the manufacturing difficulty of the first drain channel and reduces the manufacturing cost of the entire battery device 100.

[0112] In some embodiments, such as Figure 5 and Figure 8 As shown, a recessed second drain groove 22 is formed on the side surface of the connecting plate 20 facing the heat exchange joint 40. One end of the second drain groove 22 is connected to the cavity 42, and the other end of the second drain groove 22 passes through the edge of the connecting plate 20. The inner wall of the second drain groove 22 and the heat exchange joint 40 together form the first drain channel.

[0113] Understandably, when the failure of the first seal 43 causes leakage at the connection between the heat exchange joint 40 and the heat exchange pipe 30, the leaked coolant can be discharged through the second drain groove 22. The groove structure is relatively simple, which simplifies the manufacturing difficulty of the first drain channel and reduces the overall manufacturing cost of the battery device 100. Furthermore, forming a drain groove on the connecting plate 20 is less difficult and less expensive than forming one on the heat exchange joint 40. Therefore, forming a recessed second drain groove 22 on the side of the connecting plate 20 facing the housing 10 further reduces the overall manufacturing cost of the battery device 100.

[0114] In the above technical solution, by forming a recessed first drain groove 28 on the side surface of the heat exchange joint 40 facing the connecting plate 20, and / or forming a recessed second drain groove 22 on the side surface of the connecting plate 20 facing the heat exchange joint 40, it is possible to ensure that the leaked coolant can be discharged into the heat exchange joint 40, while also simplifying the manufacturing difficulty of the first drain channel, thereby reducing the manufacturing cost of the entire battery device 100.

[0115] In some embodiments, such as Figure 5 and Figure 7 As shown, one of the connecting plate 20 and the heat exchanger 40 is formed as a first positioning protrusion 23, and the other is formed as a positioning groove 41. The first positioning protrusion 23 is fitted into the positioning groove 41.

[0116] It is understood that if the first positioning protrusion 23 is formed on the connecting plate 20, then the positioning groove 41 is formed on the heat exchange joint 40; if the first positioning protrusion 23 is formed on the heat exchange joint 40, then the positioning groove 41 is formed on the connecting plate 20.

[0117] In the above technical solution, by setting the first positioning protrusion 23 and the positioning groove 41, the assembly convenience and assembly speed of the connecting plate 20 and the heat exchange joint 40 can be improved, thereby improving the assembly speed of the entire battery device 100.

[0118] In some embodiments, such as Figure 5 and Figure 7 As shown, both the first positioning protrusion 23 and the positioning groove 41 extend in a ring shape along the circumference of the second through hole 21.

[0119] In the above technical solution, by setting the first positioning protrusion 23 and the positioning groove 41 to extend in a ring shape along the circumference of the second through hole 21, the assembly accuracy of the connecting plate 20 and the heat exchange joint 40 can be further improved.

[0120] In some embodiments, such as Figure 5 and Figure 7 As shown, a first positioning protrusion 23 is formed on the connecting plate 20, and a positioning groove 41 is formed on the heat exchange joint 40. The positioning groove 41 is open on one side facing the cavity 42 so as to communicate with the cavity 42. One end of the first drain channel is connected to the cavity 42 through the positioning groove 41.

[0121] Specifically, when the failure of the first seal 43 causes leakage at the connection between the heat exchange joint 40 and the heat exchange pipe 30, the coolant can be guided through the positioning groove 41 to the first drain channel, and then discharged through the first drain channel. It is understood that in this embodiment, the positioning groove 41 not only positions the connecting plate 20 but also guides the leaked liquid. This reduces the need for additional positioning components or guide pipes, thereby improving the compactness of the structure and reducing manufacturing costs.

[0122] In the above technical solution, a first positioning protrusion 23 is formed on the connecting plate 20, and a positioning groove 41 is formed on the heat exchange joint 40. The positioning groove 41 is open on one side facing the cavity 42 so as to communicate with the cavity 42. One end of the first drain channel is connected to the cavity 42 through the positioning groove 41. This allows the positioning groove 41 to not only position the connecting plate 20, but also guide the leaked liquid. In this way, the presence of additional positioning parts or guide pipes can be reduced, thereby improving the compactness of the structure and the manufacturing cost of the structure.

[0123] In some embodiments, such as Figure 5 and Figures 8-9As shown, a recessed second drain groove 22 is formed on the side surface of the connecting plate 20 facing the heat exchange joint 40. The inner wall of the second drain groove 22 and the side surface of the heat exchange joint 40 facing the connecting plate 20 together define the first drain channel. In the projection plane perpendicular to the axis of the second through hole 21, one end of the second drain groove 22 is located in the projection of the positioning groove 41, and the other end of the second drain groove 22 extends to the edge of the connecting plate 20.

[0124] The statement that "one end of the second drain trough 22 is located within the projection of the positioning groove 41 in the projection plane perpendicular to the axis of the second through hole 21" is intended to illustrate that one end of the second drain trough 22 is connected to the inside of the positioning groove 41. This ensures that leaked liquid inside the cavity 42 can be discharged from the second drain trough 22 to the external environment, thereby preventing excessive water pressure from overflowing into the housing 10 and causing internal short circuits or damage to the battery cells 90.

[0125] In addition, the structure of the second drain tank 22 is relatively simple, which can reduce the manufacturing cost of the entire connecting plate 20, thereby reducing the manufacturing cost of the entire battery device 100.

[0126] In the above technical solution, by forming a recessed second drain groove 22 on the side surface of the connecting plate 20 facing the heat exchange joint 40, the manufacturing cost of the entire connecting plate 20 can be reduced, thereby reducing the manufacturing cost of the entire battery device 100.

[0127] In some embodiments, such as Figure 5 As shown, a second sealing element 51 is formed on the side of the connecting plate 20 facing the housing 10. The second sealing element 51 extends in a ring around the second through hole 21 and seals against the connecting plate 20 and the housing 10.

[0128] In the above technical solution, by setting the second sealing element 51, the connection plate 20 and the housing 10 can be sealed, thereby effectively preventing dust, water and other impurities from entering the housing 10 through the gap between the connection plate 20 and the housing 10, thereby improving the sealing performance of the housing 10 and improving the reliability of the battery device 100.

[0129] In some embodiments, such as Figures 10-12 As shown, the connecting plate 20 has a recessed first limiting groove 24 on the side facing the housing 10. The first limiting groove 24 extends in a ring around the second through hole 21. The second sealing member 51 is arranged in the first limiting groove 24.

[0130] Optional, refer to Figure 12The diameter of the first limiting groove 24 is larger than the diameter of the second through hole 21, that is, the diameter of the third sealing element 52 is larger than the diameter of the second through hole 21. In this way, the sealing integrity of the second sealing element 51 can be further improved.

[0131] In the above technical solution, by setting the first limiting groove 24, the installation position of the second sealing member 51 can be limited, thereby improving the assembly efficiency of the second sealing member 51 and thus improving the assembly efficiency of the battery device 100; at the same time, the compression ratio of the second sealing member 51 can also be limited, so that the second sealing member 51 can achieve the sealing effect while ensuring the service life of the sealing strip.

[0132] In some embodiments, such as Figures 10-12 As shown, a second drain channel is formed on the connecting plate 20 and / or the housing 10. The second drain channel is arranged on the side of the first limiting groove 24 away from the second through hole 21. One end of the second drain channel is connected to the first limiting groove 24, and the other end is connected to the external space.

[0133] The phrase "a second drainage channel is formed on the connecting plate 20 and / or the housing 10" can be understood to mean that, in this embodiment, a second drainage channel may be formed only on the connecting plate 20, or only on the housing 10; or a second drainage channel may be formed on both the connecting plate 20 and the housing 10.

[0134] For example, when the battery device 100 is configured on the vehicle 1000, since the vehicle 1000 is generally used in water, external liquid will enter the first limiting groove 24 through the gap between the connecting plate 20 and the housing 10. As a result, a second drainage channel is formed on the connecting plate 20 and / or the housing 10, which can drain the liquid in the first limiting groove 24 in a timely manner. This can effectively prevent the external liquid from accumulating for a long time and causing corrosion to the second seal 51, thereby improving the service life and sealing effect of the second seal 51. At the same time, it can further reduce the risk of external liquid entering the housing 10 through the second seal 51, thereby improving the reliability of the battery device 100.

[0135] In the above technical solution, by setting a second drainage channel, the liquid in the first limiting groove 24 can be discharged in time, thereby effectively preventing the long-term accumulation of external liquid from corroding the second seal 51, improving the service life and sealing effect of the second seal 51; at the same time, it can further reduce the risk of external liquid entering the inside of the housing 10 from the second seal 51, thereby improving the reliability of the battery device 100.

[0136] In some embodiments, such as Figure 8As shown, a recessed third drain groove 27 is formed on the side surface of the housing 10 facing the connecting plate 20. One end of the third drain groove 27 is connected to the first limiting groove 24, and in the projection plane perpendicular to the axis of the second through hole 21, the other end of the third drain groove 27 extends beyond the edge of the connecting plate 20. The inner wall of the third drain groove 27 and the connecting plate 20 together form a second drain channel.

[0137] Specifically, one end of the third drain groove 27 is connected to the first limiting groove 24, and the other end extends beyond the edge of the connecting plate 20. This ensures that liquid entering the first limiting groove 24 can be discharged from the third drain groove 27 and will not accumulate in the first limiting groove 24. In addition, the structure of the groove is relatively simple, which simplifies the manufacturing difficulty of the second drain channel and reduces the overall manufacturing cost of the battery device 100.

[0138] In some embodiments, such as Figures 10-12 As shown, a recessed fourth drain groove 25 is formed on the side surface of the connecting plate 20 facing the box 10. One end of the fourth drain groove 25 is connected to the first limiting groove 24, and the other end of the fourth drain groove 25 passes through the edge of the connecting plate 20. The inner wall of the fourth drain groove 25 and the box 10 together form a second drain channel.

[0139] Understandably, the water in the first limiting groove 24 can be discharged through the fourth drain groove 25. The structure of the groove is relatively simple, which simplifies the manufacturing difficulty of the second drain channel and reduces the overall manufacturing cost of the battery device 100. In addition, forming a drain groove on the connecting plate 20 is less difficult and less expensive than forming a drain groove on the housing 10. Therefore, forming a recessed fourth drain groove 25 on the side of the connecting plate 20 facing the housing 10 can further reduce the overall manufacturing cost of the battery device 100.

[0140] In the above technical solution, by forming a recessed third drain groove 27 on the side surface of the housing 10 facing the connecting plate 20, and / or forming a recessed fourth drain groove 25 on the side surface of the connecting plate 20 facing the housing 10, it is possible to ensure that the liquid in the first limiting groove 24 is discharged in time, while also simplifying the manufacturing difficulty of the second drain channel, thereby reducing the manufacturing cost of the entire battery device 100.

[0141] In some embodiments, such as Figure 5 and Figure 7 As shown, a third sealing element 52 is provided in the second through hole 21. The third sealing element 52 extends in a ring around the circumference of the second through hole 21 and seals against the inner wall of the second through hole 21 and the outer peripheral wall of the heat exchange pipe 30.

[0142] The phrase "the third seal 52 seals against the inner wall of the second through hole 21 and the outer peripheral wall of the heat exchange pipe 30" can be understood to mean that the third seal 52 can be a sealing ring, which is a detachable component and mainly relies on elastic deformation to achieve sealing. In this way, when the third seal 52 is damaged, only the third seal 52 needs to be replaced, thereby reducing the maintenance cost of the battery device 100.

[0143] In the above technical solution, by setting a third sealing element 52, it is possible to prevent the liquid leaking from the connection between the heat exchange pipe 30 and the heat exchange joint 40 from flowing into the housing 10 along the outer peripheral wall of the heat exchange pipe 30, thereby causing an internal short circuit or damage to the battery cell 90.

[0144] In some embodiments, such as Figure 5 and Figure 7 As shown, the second through hole 21 includes: a first hole section 211 and a second hole section 212. The first hole section 211 is connected to the side of the second hole section 212 facing the heat exchange joint 40. The cross-sectional dimension of the first hole section 211 is larger than that of the second hole section 212. The third seal 52 is arranged in the first hole section 211.

[0145] The phrase "the cross-sectional dimension of the first hole segment 211 is larger than the cross-sectional dimension of the second hole segment 212, and the third seal 52 is arranged inside the first hole segment 211" indicates that a stepped surface is formed at the connection position of the first hole segment 211 and the second hole segment 212, and this stepped surface can play a certain role in stopping and positioning the third seal 52. This facilitates the assembly of the third seal 52, effectively improves the assembly stability of the third seal 52, and thus ensures the sealing effect of the third seal 52.

[0146] In the above technical solution, by setting the second through hole 21, which includes a first hole segment 211 and a second hole segment 212, the cross-sectional dimension of the first hole segment 211 is larger than that of the second hole segment 212, and the third sealing element 52 is arranged in the first hole segment 211, the second through hole 21 itself can play a certain role in stopping and positioning as a sealing element, which can facilitate the assembly of the third sealing element 52, effectively improve the assembly stability of the third sealing element 52, and reduce the use of parts, thereby reducing the production cost of the entire battery device 100.

[0147] In some embodiments, such as Figure 5 and Figure 7 and Figure 12 As shown, the battery device 100 further includes a first stop 60, which is arranged in the first hole section 211 and located on the side of the third seal 52 facing the heat exchange joint 40.

[0148] For example, such as Figure 5and Figure 7 and Figure 12 As shown, the first stop 60 is formed in an annular shape around the second through hole 21 and is arranged on the side of the third seal 52 facing the heat exchange joint 40. It can stop the third seal 52 in the axial direction of the second through hole 21, thereby effectively preventing the third seal 52 from coming out of the opening of the first hole section 211, and thus further improving the assembly stability and sealing effect of the third seal 52.

[0149] In the above technical solution, by setting the first stop 60, the third seal 52 can be effectively prevented from coming out of the opening of the first hole 211, thereby further improving the assembly stability and sealing effect of the third seal 52.

[0150] In some embodiments, such as Figure 5 and Figure 7 As shown, a locking protrusion 61 is formed on one of the inner walls of the first stop member 60 and the first hole section 211, and a locking groove 213 is formed on the other. The locking protrusion 61 fits into the locking groove 213 so that the first stop member 60 is locked and connected to the connecting plate 20.

[0151] The phrase "one of the inner walls of the first stop member 60 and the first hole segment 211 has a locking protrusion 61 and the other has a locking groove 213" can be understood as follows: if the first stop member 60 has a locking protrusion 61, then the inner wall of the first hole segment 211 has a locking groove 213; if the first hole segment 211 has a locking protrusion 61, then the first stop member 60 has a locking protrusion 61.

[0152] For example Figure 5 and Figure 7 As shown, a hook is connected to the end edge of the first hole section 211 facing the heat exchange joint 40. The hook and the inner wall of the first hole section 211 together form a groove 213. A protrusion 61 that mates with the groove 213 is formed on the first stop member 60. It should be noted that the hook is formed as the first positioning protrusion 23 of this application.

[0153] Optionally, the first stop 60 is part of the heat exchange joint 40. The first stop 60 is arranged on the side of the heat exchange joint 40 facing the connecting plate 20, and extends annularly around the connection hole. The first stop 60 is snapped into connection with the connecting plate 20. In this way, when the connecting plate 20 and the heat exchange joint 40 are assembled, the first stop 60 can be used to snap into the connecting plate 20 to achieve pre-installation of the connecting plate 20 and the heat exchange joint 40, thereby improving the assembly speed of the battery device 100.

[0154] In the above technical solution, by setting the first stop 60 to be snapped into the connecting plate 20, the installation and disassembly of the first stop 60 can be facilitated. At the same time, when the third seal 52 is to be installed or replaced, the installation and replacement of the third seal 52 can be achieved simply by disassembling the first stop 60, thereby improving the maintenance speed of the third seal 52.

[0155] In some embodiments, such as Figure 5 and Figure 7 As shown, the connecting plate 20 has a second positioning protrusion 26, which extends in a ring shape along the circumference of the second through hole 21, and the second positioning protrusion 26 is positioned and fitted in the first through hole 12.

[0156] Specifically, when assembling the connecting plate 20 and the housing 10, the second positioning protrusion 26 can be fitted into the first through hole 12 first, and then the connecting plate 20 and the housing 10 can be fixed. This can improve the assembly accuracy of the connecting plate 20 and the housing 10, and at the same time, reduce the difficulty of connecting the connecting plate 20 and the housing 10, and increase the assembly speed of the connecting plate 20 and the housing 10.

[0157] In the above technical solution, by setting the second positioning protrusion 26, the connecting plate 20 can be pre-positioned when it is fixed to the housing 10, thereby improving the assembly accuracy of the connecting plate 20 and the housing 10. At the same time, it can also reduce the difficulty of connecting the connecting plate 20 and the housing 10 and increase the assembly speed of the connecting plate 20 and the housing 10.

[0158] In some embodiments, such as 8 and Figures 13-14 As shown, the battery device 100 also includes: a fixing member 70, which is arranged in the receiving cavity 11 and is fastened to the housing 10 by fasteners 81. One end of the heat exchange pipe 30 is fixed to the fixing member 70.

[0159] For example Figure 8 As shown, the fixing member 70 is a fixing plate, which can increase the contact area between the heat exchange pipe 30 and the box 10, thereby improving the connection stability between the heat exchange pipe 30 and the box 10.

[0160] In the above technical solution, by setting the fixing component 70 to fix the heat exchange pipe 30 to the box 10, the vibration force transmitted to the heat exchange pipe 30 can be effectively reduced, thereby reducing the risk of breakage at the connection between the heat exchange pipe 30 and the heat exchange component, thus improving the reliability of the heat exchange structure.

[0161] In some embodiments, the position of the fastener 70 relative to the housing 10 is adjustable.

[0162] It should be noted that the position of the fastener 70 relative to the housing 10 is adjustable, and it can be adjusted in any direction in three-dimensional space; there are no restrictions here.

[0163] In the above technical solution, by setting the position of the fixing component 70 relative to the housing 10 to be adjustable, the assembly tolerance between the heat exchange pipe 30, the heat exchange joint 40 and the connecting plate 20 and the housing 10 can be increased, thereby reducing the hard connection of the battery device 100 during the assembly process, reducing the probability of damage to parts of the battery device 100 during the assembly process, and thus improving the reliability of the battery device 100 assembly.

[0164] In some embodiments, such as Figure 14 As shown, a mounting hole 71 is formed on the fastener 70, and the fastener 81 is clearance-fitted into the mounting hole 71.

[0165] The clearance fit is intended to indicate that the diameter of the mounting hole 71 is larger than the diameter of the shank of the fastener 81.

[0166] In the above technical solution, the fixing member 70 has a mounting hole 71, and the fastener 81 is clearance-fitted into the mounting hole 71, so that the fixing member 70 can wiggle relative to the fastener 81, thereby making the position of the fixing member 70 relative to the housing 10 adjustable. Since the fixing member 70 is fixed to one end of the heat exchange pipe 30, and the other end of the heat exchange pipe 30 extends out of the receiving cavity 11 and is assembled with the heat exchange joint 40 and the connecting plate 20, the clearance fit of the fastener 81 into the mounting hole 71 can increase the assembly tolerance between the heat exchange pipe 30, the heat exchange joint 40 and the connecting plate 20 and the housing 10, thereby reducing the hard connection of the battery device 100 during the assembly process, reducing the probability of damage to the parts of the battery device 100 during the assembly process, and thus improving the reliability of the battery device 100 assembly.

[0167] In some embodiments, such as Figure 14 As shown, the battery device 100 also includes a sleeve 82, which is sleeved on the fastener 81 and has a clearance fit within the mounting hole 71.

[0168] It should be noted that the sleeve 82 can be made of flexible material or rigid wear-resistant material; there is no restriction here.

[0169] In the above technical solution, by setting the sleeve 82, the fastener 81 can be protected to a certain extent, the wear rate of the fastener 81 can be reduced, and the risk of the fastener 81 breaking during installation can be reduced, thereby improving the reliability of the battery device 100.

[0170] In some embodiments, such as Figure 14As shown, the sleeve 82 includes a first ring portion 821 and a second ring portion 822. The first ring portion 821 is sleeved and fixed on the outside of the fastener 81. The first ring portion 821 is disposed in the mounting hole 71 and is clearance-fitted with the mounting hole 71. One end of the second ring portion 822 is connected to the first ring portion 821, and the other end extends outward along the radial direction of the mounting hole 71. In the axial direction of the mounting hole 71, the second ring portion 822 is clearance-fitted between the head of the fastener 81 and the fixing member 70.

[0171] It is understandable that the fastener 70 can be adjusted not only in the circumferential direction of the mounting hole 71 relative to the housing 10, but also in the axial direction relative to the housing 10. This can further reduce the hard connections of the battery device 100 during the assembly process, thereby further reducing the probability of damage to parts of the battery device 100 during the assembly process and thus improving the reliability of the battery device 100 assembly.

[0172] In the above technical solution, by setting the sleeve 82 to include: a first ring portion 821 and a second ring portion 822, and the first ring portion 821 is clearance-fitted with the mounting hole 71, and the second ring portion 822 is clearance-fitted with the head of the fastener 81 and the fixing member 70, hard connections can be further reduced, thereby further reducing the probability of damage to parts of the battery device 100 during assembly, thereby improving the reliability of the battery device 100 assembly.

[0173] In some embodiments, the heat exchange pipe 30 and the fixing member 70 are integrally formed.

[0174] In the above technical solution, by setting the heat exchange pipe 30 and the fastener 70 to be integrally formed, the assembly steps of the box 10 can be simplified, thereby increasing the assembly speed of the box 10 and reducing labor costs.

[0175] In some embodiments, such as Figure 8 As shown, there are two heat exchange joints 40, and the heat exchange pipe 30 and the connecting plate 20 correspond one-to-one with the heat exchange joint 40.

[0176] For example Figure 8 As shown, there are two heat exchange joints 40, one of which is a liquid inlet and the other is a liquid outlet. There are also two heat exchange pipes 30, which are used for liquid inlet and liquid outlet respectively. The liquid inlet pipe is connected to the liquid inlet joint, and the liquid outlet pipe is connected to the liquid outlet joint. There are also two connecting plates 20, which are respectively sleeved on the radial outer side of the two heat exchange pipes 30 and fixedly connected to the two heat exchange joints 40 respectively.

[0177] For example Figure 8As shown, the heat exchange joint 40 is bolted to the connecting plate 20, and the connecting plate 20 is also bolted to the housing 10. Specifically, the housing 10 has a first connecting hole, the connecting plate 20 has a second connecting hole, and the heat exchange joint 40 has a third connecting hole. Bolts pass through the first, second, and third connecting holes in sequence to fix the housing 10 to the connecting plate 20 and the heat exchange joint 40. It should be noted that there are multiple first, second, and third connecting holes, and each of these holes corresponds to the other.

[0178] Optionally, at least one of the first connecting hole, the second connecting hole, and the third connecting hole is a stepped bolt hole to ensure that the connecting plate 20 is in uniform contact with the housing 10.

[0179] In the above technical solution, by setting the number of heat exchange joints 40 to two, and the heat exchange pipe 30 and the connecting plate 20 corresponding one-to-one with the heat exchange joints 40, the liquid inlet and liquid outlet can be made to not interfere with each other. At the same time, if one of them is damaged, only the corresponding damaged part needs to be replaced and repaired. In this way, the maintenance cost of the entire battery device 100 can be reduced.

[0180] In some embodiments, refer to Figures 15-16 The battery device 100 further includes a second stop 44, which is arranged in the cavity 42 and located on the side of the first seal 43 facing the connecting plate 20.

[0181] For example Figure 16 As shown, the second stop 44 extends in a ring shape around the cavity 42 in the circumferential direction and is located on the side of the first seal 43 facing the connecting plate 20. It is used to stop the first seal 43 and effectively prevent the first seal 43 from coming out of the opening of the connection hole, thereby further improving the assembly stability and sealing effect of the first seal 43.

[0182] Optionally, the second stop 44 is snapped into the heat exchange joint 40, which facilitates the assembly and disassembly of the first seal 43, thereby improving the assembly and maintenance speed of the battery device 100.

[0183] In the above technical solution, by setting the second stop 44, the first seal 43 can be effectively prevented from falling out of the opening of the joint hole, thereby further improving the assembly stability and sealing effect of the first seal 43. Optionally, it also includes: a leakage alarm device, wherein the leakage alarm device is installed on the heat exchange joint 40, and is used to detect the flow or pressure at the connection position between the heat exchange joint 40 and the heat exchange pipe 30 in real time. When the flow is abnormal, an alarm signal is issued so that the user can detect and deal with the problem in time.

[0184] Secondly, embodiments of this application also provide an electrical device, including a battery device 100 according to the first aspect of this application.

[0185] In the above technical solution, by setting the battery device 100 of the first aspect embodiment, the overall performance of the power-consuming device is improved.

[0186] The following will refer to Figures 3-14 This application describes a battery device 100 according to a specific embodiment.

[0187] Reference Figure 3 and Figure 8 The battery device 100 includes: a housing 10, a connecting plate 20, a heat exchange pipe 30, and a heat exchange connector 40.

[0188] The housing 10 has an internal cavity 11 and a first through hole 12. A connecting plate 20 is arranged on the outside of the housing 10 and is sealed to the housing 10. The connecting plate 20 has a second through hole 21. One end of the heat exchange pipe 30 is located in the cavity 11, and the other end extends out to the outside of the housing 10 through the first through hole 12 and the second through hole 21 in sequence. The heat exchange pipe 30 is sealed to the connecting plate 20. The heat exchange joint 40 is fixed to the connecting plate 20 and is located on the side of the connecting plate 20 away from the housing 10. The heat exchange joint 40 has a connection hole. The other end of the heat exchange pipe 30 is inserted into the connection hole and sealed to the inner wall of the connection hole to form a first sealing element 43. A cavity 42 is defined between the outer peripheral surface of the heat exchange pipe 30 and the inner wall of the connection hole on the side of the first sealing element 43 facing the connecting plate 20.

[0189] Specifically, a recessed drain groove is formed on the side surface of the connecting plate 20 facing the heat exchange joint 40. One end of the drain groove is connected to the cavity 42, and the other end of the drain groove passes through the edge of the connecting plate 20. The inner wall of the drain groove and the connecting plate 20 together form the first drain channel.

[0190] A first positioning protrusion 23 is also formed on the connecting plate 20, and a positioning groove 41 is formed on the heat exchange joint 40. The positioning groove 41 is open on one side facing the cavity 42 so as to communicate with the cavity 42. One end of the first drain channel is connected to the cavity 42 through the positioning groove 41 so as to discharge the leaked liquid in the cavity 42.

[0191] The battery device 100 further includes a second sealing member 51, wherein a recessed first limiting groove 24 is formed on the side of the connecting plate 20 facing the housing 10, the first limiting groove 24 extends circumferentially around the second through hole 21 in an annular shape, and the second sealing member 51 is arranged within the first limiting groove 24 and seals against the connecting plate 20 and the housing 10. A recessed drain groove is also formed on the surface of the connecting plate 20 facing the housing 10, the inner wall of the drain groove and the housing 10 together constrain a second drain channel, one end of the second drain channel is connected to the first limiting groove 24, and the other end of the second drain channel penetrates the edge of the connecting plate 20 to drain the water collected in the first limiting groove 24.

[0192] The battery device 100 further includes a third seal 52 and a first stop 60. The second through hole 21 includes a first section 211 and a second section 212. The first section 211 connects to the side of the second section 212 facing the heat exchange joint 40. The cross-sectional dimension of the first section 211 is larger than that of the second section 212. The third seal 52 is disposed within the first section 211 and seals against the inner wall of the second through hole 21 and the outer peripheral wall of the heat exchange connector 30. The first stop 60 is disposed within the first section 211 and is located on the side of the third seal 52 facing the heat exchange joint 40 to prevent the third seal 52 from dislodging from the first section 211. Further, a protrusion 61 is formed on one of the inner walls of the first stop 60 and the first section 211, and a groove 213 is formed on the other. The protrusion 61 engages with the groove 213 to engage with the connecting plate 20.

[0193] The battery assembly 100 further includes a fixing member 70, which is disposed within the receiving cavity 11 and is fastened to the housing 10 by a fastener 81. One end of the heat exchange pipe 30 is fixed to the fixing member 70, and the position of the fixing member 70 relative to the housing 10 is adjustable. Specifically, the fixing member 70 has a mounting hole 71, and the fastener 81 is clearance-fitted into the mounting hole 71.

[0194] Furthermore, the battery device 100 also includes a sleeve 82, which is sleeved on the fastener 81 and clearance-fitted within the mounting hole 71. Specifically, the sleeve 82 includes a first ring portion 821 and a second ring portion 822. The first ring portion 821 is sleeved and fixed on the outside of the fastener 81 and is disposed within the mounting hole 71, clearance-fitting with the mounting hole 71. One end of the second ring portion 822 is connected to the first ring portion 821, and the other end extends radially outward along the mounting hole 71. In the axial direction of the mounting hole 71, the second ring portion 822 clearance-fits between the head of the fastener 81 and the fixing member 70.

[0195] Furthermore, the connecting plate 20 has a second positioning protrusion 26, which extends in a ring shape along the circumference of the second through hole 21, and the second positioning protrusion 26 is positioned and fitted within the first through hole 12.

[0196] In the above technical solution, by setting the connecting plate 20 and the first drain channel, the probability of leakage liquid at the connection position of the heat exchange joint 40 and the heat exchange pipe 30 entering the inside of the housing 10 through the first through hole 12 can be effectively reduced, thereby reducing the risk of short circuit of the battery cell 90 caused by coolant leakage, and thus improving the reliability of the battery device 100.

[0197] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A housing (10) having an internal cavity (11) and a first through hole (12) on the housing (10); A connecting plate (20) is arranged on the outside of the housing (10) and fixedly connected to the housing (10). The connecting plate (20) has a second through hole (21). A heat exchange pipe (30) is provided, one end of which is located inside the receiving cavity (11), and the other end extends out to the outside of the box body (10) through the first through hole (12) and the second through hole (21) in sequence. The heat exchange pipe (30) is sealed to the connecting plate (20). A heat exchange joint (40) is fixed to the connecting plate (20) and located on the side of the connecting plate (20) away from the housing (10). The heat exchange joint (40) has a connection hole, and the other end of the heat exchange pipe (30) is inserted into the connection hole. The heat exchange joint (40) includes a first sealing member (43), which extends in an annular shape around the heat exchange pipe (30) and seals against the radial outer side of the heat exchange pipe (30). A cavity (42) is defined between the first seal (43), the inner wall of the connection hole, and the heat exchange connector (30) and the inner wall of the connection hole. In the axial direction of the first seal (43), the cavity (42) is located on the side of the first seal (43) facing the connecting plate (20). The heat exchange connector (40) and / or the connecting plate (20) are provided with a first drain channel. One end of the first drain channel is connected to the cavity (42), and the other end is connected to the external space.

2. The battery device according to claim 1, characterized in that, The heat exchange joint (40) has a recessed first drain groove (28) formed on the side surface facing the connecting plate (20). One end of the first drain groove (28) is connected to the cavity (42), and the other end of the first drain groove (28) extends through the edge of the heat exchange joint (40). The inner wall of the first drain groove (28) and the connecting plate (20) together define the first drain channel; and / or, The connecting plate (20) has a recessed second drain groove (22) formed on the side surface facing the heat exchange joint (40). One end of the second drain groove (22) is connected to the cavity (42), and the other end of the second drain groove (22) passes through the edge of the connecting plate (20). The inner wall of the second drain groove (22) and the heat exchange joint (40) together define the first drain channel.

3. The battery device according to claim 1, characterized in that, One of the connecting plate (20) and the heat exchange joint (40) is formed as a first positioning protrusion (23), and the other is formed as a positioning groove (41), with the first positioning protrusion (23) fitting into the positioning groove (41).

4. The battery device according to claim 3, characterized in that, The first positioning protrusion (23) and the positioning groove (41) both extend in a ring shape along the circumference of the second through hole (21).

5. The battery device according to claim 3, characterized in that, The first positioning protrusion (23) is formed on the connecting plate (20), and the positioning groove (41) is formed on the heat exchange joint (40). The positioning groove (41) is open to one side of the cavity (42) to communicate with the cavity (42). One end of the first drain channel is connected to the cavity (42) through the positioning groove (41).

6. The battery device according to claim 5, characterized in that, The connecting plate (20) has a recessed second drain groove (22) formed on the side surface facing the heat exchange joint (40). The inner wall of the second drain groove (22) and the side surface of the heat exchange joint (40) facing the connecting plate (20) together define the first drain channel. In the projection plane perpendicular to the axis of the second through hole (21), one end of the second drain groove (22) is located in the projection of the positioning groove (41), and the other end of the second drain groove (22) extends to the edge of the connecting plate (20).

7. The battery device according to any one of claims 1-6, characterized in that, The connecting plate (20) has a second sealing element (51) formed on the side facing the housing (10). The second sealing element (51) extends in a ring around the second through hole (21) and seals against the connecting plate (20) and the housing (10).

8. The battery device according to claim 7, characterized in that, The connecting plate (20) has a recessed first limiting groove (24) on the side facing the box (10). The first limiting groove (24) extends in a ring around the second through hole (21) in the circumferential direction. The second sealing member (51) is arranged in the first limiting groove (24).

9. The battery device according to claim 8, characterized in that, A second drain channel is formed on the connecting plate (20) and / or the housing (10). The second drain channel is arranged on the side of the first limiting groove (24) away from the second through hole (21). One end of the second drain channel is connected to the first limiting groove (24), and the other end is connected to the external space.

10. The battery device according to claim 9, characterized in that, The housing (10) has a recessed third drainage groove (27) formed on the side surface facing the connecting plate (20). One end of the third drainage groove (27) is connected to the first limiting groove (24), and in the projection plane perpendicular to the axis of the second through hole (21), the other end of the third drainage groove (27) extends beyond the edge of the connecting plate (20). The inner wall of the third drainage groove (27) and the connecting plate (20) together define the second drainage channel; and / or, The connecting plate (20) has a recessed fourth drain groove (25) on one side surface facing the box (10). One end of the fourth drain groove (25) is connected to the first limiting groove (24), and the other end of the fourth drain groove (25) passes through the edge of the connecting plate (20). The inner wall of the fourth drain groove (25) and the box (10) together form the second drain channel.

11. The battery device according to any one of claims 1-6, characterized in that, The second through hole (21) is provided with a third sealing element (52), which extends in a ring shape around the second through hole (21) and seals against the inner wall of the second through hole (21) and the outer peripheral wall of the heat exchange pipe (30).

12. The battery device according to claim 11, characterized in that, The second through hole (21) includes a first hole section (211) and a second hole section (212). The first hole section (211) is connected to the side of the second hole section (212) facing the heat exchange joint (40). The cross-sectional dimension of the first hole section (211) is larger than that of the second hole section (212). The third seal (52) is arranged in the first hole section (211).

13. The battery device according to claim 12, characterized in that, Also includes: The first stop (60) is arranged in the first hole section (211) and is located on the side of the third seal (52) facing the heat exchange joint (40).

14. The battery device according to claim 13, characterized in that, One of the inner walls of the first stop (60) and the first hole (211) has a locking protrusion (61) and the other has a locking groove (213). The locking protrusion (61) fits into the locking groove (213) so that the first stop (60) is engaged with the connecting plate (20).

15. The battery device according to claim 1, characterized in that, The connecting plate (20) has a second positioning protrusion (26), which extends in a ring shape along the circumference of the second through hole (21) and is positioned and fitted in the first through hole (12).

16. The battery device according to claim 1, characterized in that, Also includes: A fastener (70) is arranged inside the receiving cavity (11). The fastener (70) is fastened to the housing (10) by a fastener (81). One end of the heat exchange pipe (30) is fixed to the fastener (70).

17. The battery device according to claim 16, characterized in that, The position of the fastener (70) relative to the housing (10) is adjustable.

18. The battery device according to claim 16, characterized in that, The fastener (70) has a mounting hole (71) formed therein, and the fastener (81) is fitted with the mounting hole (71) with clearance.

19. The battery device according to claim 18, characterized in that, Also includes: A sleeve (82) is fitted onto the fastener (81) and has a clearance fit within the mounting hole (71).

20. The battery device according to claim 19, characterized in that, The sleeve (82) includes: The first ring (821) is sleeved and fixed on the outside of the fastener (81). The first ring (821) is located in the mounting hole (71) and is clearance-fitted with the mounting hole (71). The second ring (822) has one end connected to the first ring (821) and the other end extending outward along the radial extension of the mounting hole (71). In the axial direction of the mounting hole (71), the second ring (822) is clearance-fitted between the head of the fastener (81) and the fixing member (70).

21. The battery device according to claim 16, characterized in that, The heat exchange pipe (30) and the fixing member (70) are integrally formed.

22. The battery device according to claim 1, characterized in that, There are two heat exchange joints (40), and the heat exchange pipe (30) and the connecting plate (20) correspond one-to-one with the heat exchange joint (40).

23. The battery device according to claim 1, characterized in that, The heat exchange joint (40) further includes a second stop (44), which is arranged in the cavity (42) and located on the side of the first seal (43) facing the connecting plate (20).

24. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1-23.

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