Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment, and the battery device comprises a box body assembly (201); the liquid cooling assembly is arranged on the box body assembly (201), the liquid cooling assembly comprises a liquid cooling part (1) and a plugging assembly (2), the liquid cooling part (1) is provided with a cooling flow channel (11), a liquid inlet (13), a liquid outlet (14) and a liquid outlet (15), the liquid inlet (13), the liquid outlet (14) and the liquid outlet (15) are communicated with the cooling flow channel (11), and the liquid outlet (15) is located in the lowest area of the liquid cooling part (1) in the gravity direction when the battery device is in an installation state. The plugging assembly (2) is configured to seal the liquid outlet (15) and can be operated to release sealing of the liquid outlet (15) to achieve liquid drainage. According to the battery device, the risk of liquid leakage caused by incomplete liquid discharge of the liquid cooling part in the transportation or maintenance process can be prevented.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, power batteries play an irreplaceable role as the power source. The demand for fast-charging vehicles is also constantly increasing, and the use of fast-charging battery devices is growing. Currently, most fast-charging battery devices adopt liquid cooling solutions.

[0003] Currently, liquid-cooled battery devices are prone to leakage during maintenance or transportation due to incomplete drainage of the liquid cooling unit, which affects the safety and economy of the battery device. Utility Model Content

[0004] The purpose of this application is to reduce the risk of leakage in battery devices during transportation or maintenance due to incomplete drainage of the liquid cooling unit.

[0005] According to a first aspect of this application, a battery device is provided, comprising:

[0006] Enclosure assembly; and

[0007] The liquid cooling assembly is located in the housing assembly. The liquid cooling assembly includes a liquid cooling section and a sealing assembly. The liquid cooling section is provided with a cooling channel and an inlet, an outlet and a drain that are connected to the cooling channel. When the battery device is installed, the drain is located in the lowest region of the liquid cooling section along the direction of gravity. The sealing assembly is configured to close the drain and can be operated to release the closure of the drain to drain the liquid.

[0008] When maintenance is required, the battery device of this embodiment does not require disconnecting the liquid cooling pipes connected to the inlet and outlet, nor does it require opening the housing assembly. The drain port is opened directly by operating the sealing assembly, allowing the coolant to flow out. Since the drain port is located in the lowest region of the liquid cooling section along the direction of gravity, all coolant in the cooling channels can be smoothly discharged into the receiving container, reducing residual coolant in the cooling channels. This eliminates the need to use tools such as air guns to blow away residual coolant, simplifying the maintenance process and facilitating coolant recycling. It also prevents coolant overflow from contacting high-voltage components and causing a short circuit. Furthermore, during battery device transportation, the coolant inside the liquid cooling section can be drained more thoroughly, preventing leakage due to vibration or bumps during transport. Therefore, this type of battery device prevents leakage during transportation or maintenance.

[0009] In addition, the drain port can be used for reverse flushing. If the liquid contains impurities such as metal shavings, or if there is a problem with the coolant type or grade that requires cleaning the cooling channels, water can be introduced through the drain port for flushing.

[0010] In some embodiments, the liquid cooling section includes a first bottom wall and a first side wall adjacent to the first bottom wall, and a drain outlet is disposed in at least one of the first bottom wall and the first side wall.

[0011] In this embodiment, the drain outlet is located on the first bottom wall, which is at the lowest position in the liquid cooling section, making it convenient to select the location of the drain outlet. In addition, gravity can be used to allow the coolant to drain naturally, minimizing coolant residue. Furthermore, the first bottom wall is relatively close to the second bottom wall of the housing assembly, which facilitates the drainage of coolant from the liquid cooling section to the outside of the housing assembly. It also makes it convenient to install a receiving container below to hold the coolant, making battery device maintenance convenient.

[0012] If the drain outlet is located on the first side wall, at the bottom of the first side wall, it will not affect the installation of the bottom of the battery device. Moreover, during maintenance, the drain outlet is located on the side, which is easy for the operator to observe. It can also be used in conjunction with the tilt of the battery device to allow the coolant to drain more smoothly.

[0013] In some embodiments, the liquid cooling section is tilted as a whole.

[0014] This embodiment tilts the liquid cooling section, allowing the coolant in the cooling channels to drain smoothly by gravity when maintenance or transport of the battery device is required. This is equivalent to pressurized drainage, which reduces residue, optimizes coolant flow and drainage efficiency, and avoids dead zones where coolant accumulates.

[0015] In some embodiments, the housing assembly has housing walls, with the liquid cooling section being part of the housing walls.

[0016] In this embodiment, the drain outlet is located at the bottom of the first bottom wall or the bottom of the first side wall of the liquid cooling section, so that the coolant can be discharged to the outside of the housing assembly without the need for additional guiding structures to guide the coolant to the outside of the housing assembly. Moreover, by integrating the liquid cooling section with the housing wall, the structure can be made more compact, reducing the installation space, or increasing the energy density when the size of the battery device is fixed.

[0017] In some embodiments, the housing assembly has housing walls, and the liquid cooling section is independently disposed on the housing walls.

[0018] This embodiment installs the liquid cooling unit as a separate component, allowing for independent and flexible adjustment of its installation posture, such as a slight tilt, to ensure the drain port is at the lowest point of the liquid cooling unit. This ensures more thorough coolant drainage during maintenance or transportation. Furthermore, in case of problems with the liquid cooling unit, it can be directly removed for replacement or repair, with the casing walls serving only a supporting and fixing function.

[0019] Furthermore, the liquid cooling unit may vibrate due to fluid flow during operation. This structure can isolate the vibration by incorporating a buffer structure to prevent it from being transmitted to the enclosure components and causing leakage at the drain port. The liquid cooling unit and the enclosure components dissipate heat independently, so the sealing performance of the drain port will not be affected by large temperature changes in the enclosure wall.

[0020] In some embodiments, the liquid cooling section is located inside the housing assembly, and the housing wall has an opening configured to allow liquid discharged from the drain port to flow out of the housing assembly.

[0021] This embodiment places the liquid cooling unit inside the housing assembly, which provides better cooling for the individual battery cells and prevents deformation or damage to the liquid cooling unit due to vibration and bumps during battery operation, thus improving cooling reliability. When it is necessary to release the coolant from the liquid cooling unit, the opening allows the liquid to easily flow out to the outside of the housing assembly.

[0022] In some embodiments, the liquid cooling section has a cylindrical portion surrounding the drain port, the cylindrical portion extending outward toward the outside of the liquid cooling section, and the sealing assembly includes a first sealing member, at least a portion of the first sealing member being embedded in the cylindrical portion to seal the drain port.

[0023] This embodiment provides a cylindrical portion around the drain port outside the liquid cooling section, which allows at least a portion of the first sealing member to be embedded in the cylindrical portion to form a mating section. This improves the connection reliability between the first sealing member and the cylindrical portion, preventing leakage caused by the first sealing member coming off during normal operation of the battery device. When maintenance or transportation is required, the first sealing member can be easily removed to drain the liquid.

[0024] In some embodiments, the first sealing member includes a rod portion and a head portion, the rod portion being embedded within a cylindrical portion and the head portion abutting against one end of the cylindrical portion away from the interior of the housing assembly.

[0025] The first sealing member structure of this embodiment can seal the drain port through the cooperation of the rod and the cylindrical part. Even if liquid leaks out through the gap between the rod and the cylindrical part, the head abutting against the outer end of the cylindrical part can prevent the liquid from flowing out, achieving a better sealing effect. Moreover, the head can also limit the extreme position of the first sealing member installation, making it easier to install the first sealing member in place.

[0026] In some embodiments, the end of the cylindrical portion away from the interior of the housing assembly is provided with an annular extension, the extension extending outward in a circumferential direction toward the cylindrical portion, and the head abutting against the outer side of the extension.

[0027] This embodiment increases the support area for the head by providing an extension on the outside of the cylindrical part. When the battery device is working normally, it prevents the head cantilever from falling off due to other external forces, thereby improving the reliability of the first sealing member in achieving the sealing.

[0028] In some embodiments, the housing assembly has housing walls.

[0029] The enclosure wall includes a second bottom wall, with the liquid cooling section disposed on the inner side of the second bottom wall. An opening is provided on the second bottom wall, and the circumferential outer wall of the extension is sealed to the opening; and / or

[0030] The box wall includes a second side wall, and the liquid cooling unit is located on the inner side of the second side wall. The second side wall has an opening, and the drain port is connected to the opening through a liquid guide pipe.

[0031] In this embodiment, the liquid cooling section is located inside the second bottom wall. It is connected to the second bottom wall via the circumferential outer wall of the extension, allowing liquid to flow out from the drain port to the outside of the housing assembly. The circumferential outer wall of the extension seals against the opening, preventing backflow of liquid into the housing assembly and improving the reliability of the battery device. Alternatively, when there is a certain gap between the second side wall of the housing assembly and the liquid cooling section, liquid can be guided out of the housing via a liquid guide tube.

[0032] In some embodiments, the liquid cooling assembly further includes at least one of a seal and a gasket, the seal and gasket being located between the extension and the head.

[0033] This embodiment improves the reliability of the first sealing element's installation within the cylindrical portion by incorporating at least one of a seal and a gasket. Simultaneous incorporation of both a gasket and a seal enhances leak-proof performance.

[0034] In some embodiments, the first sealing element is a sealing bolt, with external threads on the rod portion and internal threads on the cylindrical portion; or

[0035] The first sealing element is elastic, and the sealing assembly also includes a blocking part connected to the end of the rod away from the head. The blocking part abuts against the wall surface adjacent to the inner cavity of the liquid cooling part and the drain port.

[0036] If the first sealing element in this embodiment is a sealing bolt, it has high strength, good reliability, and good temperature and corrosion resistance. Furthermore, the sealing bolt is easy to disassemble, making it suitable for applications requiring frequent disassembly. If an elastic element is used, the first sealing element can be pulled out when liquid needs to be drained, and then inserted again after draining, enabling quick insertion and removal, reducing maintenance time. Since the first sealing element and the cylindrical part have an interference fit, a better sealing effect can be achieved. The blocking part abuts against the inner cavity of the liquid cooling part and the wall adjacent to the drain port, preventing the first sealing element from being accidentally dislodged. However, due to its elasticity, it can also detach from the drain port when external force is applied.

[0037] In some embodiments, the first sealing member is provided with a through hole, the liquid cooling assembly further includes a negative pressure suction tube, the negative pressure suction tube is disposed in the inner cavity of the liquid cooling part and one end is connected to the inner end of the through hole, and the sealing assembly further includes a second sealing member, the second sealing member being configured to close the outer end of the through hole.

[0038] This embodiment takes into account the potential for liquid accumulation dead zones within the liquid cooling section due to flow channel corners or other reasons. In addition to gravity-based liquid drainage, a negative pressure suction pipe is installed to apply negative pressure and actively remove residual liquid, resulting in more thorough drainage. Furthermore, long-term operation of the liquid cooling section may generate impurities such as metal shavings. If these accumulate within the cooling channels, they can scratch the inner walls of the channels and affect cooling efficiency. The negative pressure action can remove these impurities from the liquid cooling section.

[0039] Furthermore, the combination of two sealing components improves sealing reliability. If one sealing component experiences slight leakage, the other can slow down the leakage rate. When negative pressure drainage is required, only the second sealing component needs to be removed, without disassembling the first sealing component. This avoids wear caused by frequent disassembly of the first sealing component and ensures sealing performance.

[0040] According to a second aspect of this application, an electrical device is provided, including the battery device of the above embodiment, the battery device being used to provide electrical energy to the electrical device. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0042] Figure 1 These are outline drawings of some embodiments of the electrical equipment used in this application.

[0043] Figure 2 This is an exploded view of some embodiments of the battery device of this application.

[0044] Figure 3 This is a cross-sectional view of the first embodiment of the battery device of this application.

[0045] Figure 4 This is a cross-sectional view of a second embodiment of the battery device of this application.

[0046] Figure 5 This is a schematic diagram of the installation of the first embodiment of the sealing component.

[0047] Figure 6 This is a schematic diagram of the installation of a second embodiment of the sealing component.

[0048] Figure 7 This is a schematic diagram of the installation of the third embodiment of the sealing component.

[0049] Figure 8 This is an installation diagram of the fourth embodiment of the sealing component.

[0050] Figure 9 This is an installation diagram of the fifth embodiment of the sealing component.

[0051] The accompanying drawings are not drawn to scale.

[0052] Marker explanation:

[0053] 1. Liquid cooling section; 10. Main body; 11. Cooling channel; 12. First side wall; 13. Liquid inlet; 14. Liquid outlet; 15. Liquid drain; 16. First bottom wall; 17. Collection section; 18. Plate;

[0054] 2. Sealing assembly; 21. First sealing element; 211. Rod; 212. Head; 213. Blocking part; 214. Through hole; 22. Second sealing element;

[0055] 3. Tubular part;

[0056] 4. Extension section;

[0057] 5. Sealing components;

[0058] 6. Negative pressure straw;

[0059] 100. Battery cell;

[0060] 200. Battery assembly; 201. Housing assembly; 201A. Housing; 201B. Cover; 202. Second bottom wall; 203. Opening; 204. Second side wall;

[0061] 300. Vehicle; 301. Axle; 302. Wheel; 303. Motor; 304. Controller;

[0062] x, first direction; y, second direction; z, third direction. Detailed Implementation

[0063] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0064] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces). The implementation methods of this application will be further described in detail below with reference to the accompanying drawings and embodiments. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of this application, but should not be used to limit the scope of this application; that is, this application is not limited to the described embodiments.

[0065] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0066] This application uses terms such as "upper," "lower," "top," "bottom," "front," "back," "inner," and "outer" to indicate orientation or positional relationships. This is only for the convenience of describing this application and is not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the scope of protection of this application.

[0067] Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" does not mean strictly vertical, but rather within the permissible range of error. "Parallel" does not mean strictly parallel, but rather within the permissible range of error. The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application.

[0068] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances.

[0069] 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 some of the embodiments 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.

[0070] Current battery cells typically consist of a casing and an electrode assembly housed within the casing, with an electrolyte filled inside. The electrode assembly is primarily formed by stacking or winding first and second electrodes of opposite polarity, and usually includes an insulating component, such as a separator, between the first and second electrodes. The portions of the first and second electrodes coated with active material constitute the main body of the electrode assembly, while the uncoated portions form the first and second tabs, respectively. In a battery cell, the first electrode can be a positive electrode, including a positive current collector and positive active material layers disposed on both sides of the positive current collector. The positive current collector can be a metal foil or a composite current collector. For example, as a metal foil, silver-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium can be used. The composite current collector may include a polymer base layer and a metal layer. Composite current collectors can be formed by forming metallic materials (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). The positive electrode active material layer may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. The second electrode may be a negative electrode, including a negative electrode current collector and a negative electrode active material layer disposed on both sides of the negative electrode current collector. The negative electrode current collector may be a metal foil or a composite current collector. For example, as a metal foil, silver-surfaced aluminum or stainless steel, copper, aluminum, nickel, carbon electrodes, carbon or titanium, etc., may be used. The composite current collector may include a polymer substrate and a metal layer. The composite current collector can be formed by forming a metallic material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). The negative electrode active material layer can be a negative electrode active material known in the art for use in batteries. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Optionally, the first electrode can also be a negative electrode, and the corresponding second electrode can be a positive electrode. The first and second tabs can be located together at one end of the main body or at both ends of the main body. During the charging and discharging of the battery cell, the positive and negative electrode active materials react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0071] Most current battery devices use liquid cooling assemblies to remove the heat generated by the internal battery cells during operation. These assemblies include a liquid cooling section located at the bottom of the battery cells, with cooling channels within a cold plate. Both ends of the cold plate have upward-extending liquid inlet and outlet ports, which connect to external liquid cooling pipes. Similarly, the ends of the cooling channels are connected to the inlet and outlet ports, which in turn are connected to the external liquid cooling pipes. When the battery device requires maintenance, the liquid cooling pipes must be removed, and an external container is used to collect the coolant flowing from the liquid cooling section. Even after emptying the coolant from the cold plate, residual coolant remains in the cooling channels due to the high outlet position. Blowing this out with a pneumatic gun cannot completely solve the problem. Therefore, there is a risk of coolant overflow during maintenance, resulting in coolant waste, hindering repairs, and potentially posing a safety hazard if coolant overflows onto high-voltage components.

[0072] Furthermore, during the transportation of the battery unit after draining the coolant, residual coolant inside the liquid cooling section can easily leak due to vibration and bumps during transport. Therefore, if the coolant is not completely drained, leaks can easily occur during maintenance and transportation, affecting the safety of the battery unit.

[0073] To address this problem, this application proposes a battery device comprising: a housing and a liquid cooling assembly. The liquid cooling assembly is disposed within the housing assembly and includes a liquid cooling section and a sealing assembly. The liquid cooling section has cooling channels and an inlet, an outlet, and a drain port communicating with the cooling channels. When the battery device is in its installed state, the drain port is located in the lowest region of the liquid cooling section along the direction of gravity. The sealing assembly is configured to close the drain port and can be operated to release the seal to allow liquid to drain. This embodiment of the battery device can prevent the risk of leakage due to incomplete drainage during transportation or maintenance.

[0074] The battery device of this application embodiment can be used in electrical equipment to provide electrical energy to the equipment. The electrical equipment can be a battery-powered vehicle, an electric vehicle, a ship, or a spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.

[0075] like Figure 1As shown, the electrical equipment can be a vehicle 300, such as a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle; or the electrical equipment can be a drone or a ship. Specifically, the vehicle 300 may include an axle 301, wheels 302 connected to the axle 301, a motor 303, a controller 304, and a battery device 200. The motor 303 is used to drive the axle 301 to rotate, the controller 304 is used to control the operation of the motor 303, and the battery device 200 may be located at the bottom, front, or rear of the vehicle 300 to provide electrical energy for the operation of the motor 303 and other components in the vehicle.

[0076] like Figure 2 As shown, the battery device 200 includes a housing assembly 201 and individual battery cells 100. In the battery device 200, there can be one or more individual battery cells 100. If there are multiple individual battery cells 100, they can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that the multiple individual battery cells 100 are connected in both series and parallel connections. This can be achieved by first connecting multiple individual battery cells 100 in series, parallel, or in a mixed configuration to form a battery module, and then connecting multiple battery modules in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing assembly 201. Alternatively, all the individual battery cells 100 can be directly connected in series, parallel, or in a mixed configuration, and then the whole formed by all the individual battery cells 100 is housed within the housing assembly 201.

[0077] The housing assembly 201 can be part of the battery device, and the housing assembly 201 can be detachably installed on the electrical device for easy maintenance; or, the housing assembly 201 can be a space formed by a structural component in the electrical device to accommodate the battery cell 100. For example, when the battery cell 100 is used in the vehicle 300, the housing assembly 201 is a space formed by the vehicle frame to accommodate the battery cell 100.

[0078] The housing assembly 201 is hollow inside and is used to accommodate one or more battery cells 100. Depending on the shape, number, combination and other requirements of the battery cells 100 it accommodates, the housing assembly 201 may also have different shapes and sizes.

[0079] The battery cell 100 can be a secondary battery. A secondary battery is a battery cell 100 that can be used again after being discharged by recharging to activate the active materials.

[0080] The battery cell 100 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0081] As an example, the battery cell 100 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0082] In some embodiments, such as Figure 3 and Figure 4 This application discloses a battery device 200, comprising:

[0083] Enclosure assembly 201; and

[0084] A liquid cooling assembly is disposed in the housing assembly 201. The liquid cooling assembly includes a liquid cooling section 1 and a sealing assembly 2. The liquid cooling section 1 is provided with a cooling channel 11 and a liquid inlet 13, a liquid outlet 14 and a liquid drain 15 communicating with the cooling channel 11. The liquid drain 15 is located in the lowest region of the liquid cooling section 1 along the direction of gravity when the battery device 200 is in the installed state. The sealing assembly 2 is configured to close the liquid drain 15 and can be operated to release the closure of the liquid drain 15 to realize liquid drainage.

[0085] For example, the number of drain ports 15 can be one or more, and their shape can be circular, elliptical, rectangular, trapezoidal or other polygonal.

[0086] For example, the liquid cooling section 1 can be equipped with multiple independent chambers and multiple drain ports 15 to ensure that the liquid in each chamber can be drained.

[0087] For example, a maintenance window can be provided on the liquid cooling unit 1, so that foreign objects can be removed by opening the maintenance window if they are inside.

[0088] For example, the housing assembly 201 may include a housing 201A and a cover 201B. The housing 201A has an opening, and the cover 201B is used to close the opening at the end of the housing 201A. The housing assembly 201 contains a plurality of battery cells 100. Depending on the arrangement of the plurality of battery cells 100, the housing 201A has a rectangular cylindrical structure.

[0089] During operation, the battery cell 100 generates heat. A liquid cooling assembly is disposed within the housing assembly 201 to cool the battery cell 100 using coolant. The battery cell 100 is disposed within the housing assembly 201, and the liquid cooling assembly can be disposed at the bottom or side of the battery cell 100. The liquid cooling assembly and the housing assembly 201 can be independent components, with the liquid cooling assembly disposed between the housing assembly 201 and the battery cell 100; alternatively, the liquid cooling assembly can be integrated into the housing assembly 201. The liquid cooling assembly includes a liquid cooling section 1 and a sealing assembly 2. The liquid cooling section 1 is used for thermal management. For example, the liquid cooling section 1 can be a liquid cooling plate with a cooling channel 11 inside, which communicates with an inlet 13 and an outlet 14; or the liquid cooling section 1 can be a curved liquid cooling pipe, with the cooling channel 11 located inside the liquid cooling pipe. Both the inlet 13 and the outlet 14 can be oriented upwards. The inlet 13 is used to introduce coolant into the cooling channel 11, and the outlet 14 is used to discharge coolant, so as to realize the circulation of coolant in the liquid cooling section 1 during normal operation. Both the inlet 13 and the outlet 14 are connected to the liquid cooling pipe.

[0090] When the battery device 200 is in use or in other non-maintenance transport conditions, the sealing assembly 2 seals the coolant within the liquid cooling section 1. When the battery device 200 is in the installed state, the drain port 15 is located in the lowest region of the liquid cooling section 1 along the direction of gravity. After the sealing assembly 2 releases the seal on the drain port 15, the coolant in the cooling channel 11 flows out through the drain port 15. For example, the drain port 15 may be located at the bottom of the liquid cooling section 1 and face downwards. When the bottom of the liquid cooling section 1 is flat, the drain port 15 can be located at any position on the bottom. For example, the drain port 15 may be located on the side of the liquid cooling section 1 and face sideways, situated at the lowest position on the side.

[0091] The sealing assembly 2 can be operated to release the seal on the drain port 15 to allow drainage, which can be achieved in the following ways: At least a portion of the structure of the sealing assembly 2 can be removed from the drain port 15. For example, the removed structure can be completely detached from the liquid cooling unit 1, or it can be attached to the liquid cooling unit 1 via a connector. This method makes it less likely for the sealing assembly 2 to be lost during maintenance of the battery device 200. Alternatively, the sealing assembly 2 can be opened by rotation or other operations, opening the drain port 15 while the sealing assembly 2 is still in its original installation position.

[0092] When maintenance is required, the battery device 200 of this embodiment does not require disconnecting the liquid cooling pipes connected to the inlet 13 and outlet 14, nor does it require opening the housing assembly 201. The sealing assembly 2 is directly operated to open the drain port 15, allowing the coolant to flow out. Since the drain port 15 is located in the lowest region of the liquid cooling section 1 along the direction of gravity, the coolant in the cooling channel 11 can be smoothly discharged into the receiving container, reducing residual coolant in the cooling channel 11. This eliminates the need to use tools such as air guns to blow away residual coolant, making the maintenance process simpler and more convenient. It also facilitates coolant recycling and prevents coolant overflow from contacting high-voltage components and causing a short circuit. Furthermore, during transportation, the coolant inside the liquid cooling section 1 can be drained more thoroughly, preventing leakage due to vibration or bumps during transport. Therefore, this type of battery device 200 can prevent leakage during transportation or maintenance.

[0093] In addition, the drain port 15 can be used for reverse flushing. If the liquid contains impurities such as metal shavings, or if there is a problem with the coolant type or grade that requires cleaning the cooling channel 11, water can be introduced through the drain port 15 for flushing.

[0094] In some embodiments, such as Figure 4 As shown, the liquid cooling section 1 includes a first bottom wall 16 and a first side wall 12 adjacent to the first bottom wall 16, and a drain port 15 is provided in at least one of the first bottom wall 16 and the first side wall 12.

[0095] The drain outlet 15 can be set on the first bottom wall 16 or the first side wall 12 individually, or on both the first bottom wall 16 and the first side wall 12. The number of drain outlets 15 on the first bottom wall 16 or the first side wall 12 can be one or more.

[0096] This provides two different setup methods.

[0097] In one structural form, the liquid cooling section 1 includes a main body 10, in which cooling channels 11 are directly machined, and a first bottom wall 16 and a first side wall 12 are the bottom wall and side wall of the main body 10.

[0098] In another structural form, such as Figure 4As shown, the liquid cooling section 1 includes a main body 10 and a collector section 17. The collector section 17 is located at one end of the main body 10, for example, at one end of the main body 10 along the second direction y. When multiple cooling channels 11 are provided within the main body 10, the collector section 17 is configured to distribute the liquid flowing into the inlet area from the inlet 13 to the multiple cooling channels 11, and to collect the liquid after heat exchange in the multiple cooling channels 11 to the outlet area for discharge from the outlet 14. For example, the cooling channels 11 can be formed within the main body 10, or the cooling channels 11 can be formed directly by bending heat exchange tubes. The width of the collector section 17 along the first direction x can be smaller than that of the main body 10. The inlet area and the outlet area in the collector section 17 can be separated by a plate 18. Based on this structure, the inlet 13, outlet 14 and drain 15 can all be provided on the collection part 17, and the first bottom wall 16 and the first side wall 12 are the bottom wall and side wall of the collection part 17.

[0099] In this embodiment, the drain port 15 is located on the first bottom wall 16, which is at the lowest position in the liquid cooling section 1, making it convenient to select the location of the drain port 15. In addition, gravity can be used to allow the coolant to drain naturally, which can minimize the amount of coolant residue. Furthermore, the first bottom wall 16 is relatively close to the second bottom wall 202 of the housing assembly 201, which can facilitate the discharge of coolant in the liquid cooling section 1 to the outside of the housing assembly 201. It is also convenient to set up a receiving container below to hold the coolant, making the battery device 200 easy to maintain.

[0100] If the drain outlet 15 is located on the first side wall 12, the drain outlet 15 is located in the bottom area of ​​the first side wall 12, which will not affect the installation of the bottom of the battery device 200. Moreover, during maintenance, the drain outlet 15 is located on the side, which is convenient for the operator to observe. It can also be used in conjunction with the tilt of the battery device 200 to make the coolant drain more smoothly.

[0101] In some embodiments, the liquid cooling section 1 is tilted as a whole.

[0102] For example, the liquid cooling section 1 has a preset tilt angle along the second direction y, for example, 1° to 3°. The drain port 15 is provided at a position near the end of the first bottom wall 16 of the liquid cooling section 1 along the second direction y, so that the drain port 15 is located in the lowest region; or the drain port 15 is provided at the bottom of the first side wall 12 of the liquid cooling section 1 at a lower position.

[0103] In this embodiment, the liquid cooling section 1 is tilted as a whole. When the battery device 200 needs to be maintained or transported, the coolant in the cooling channel 11 can be smoothly discharged by gravity, which is equivalent to pressurized drainage. This can reduce residue, optimize the flow and drainage efficiency of the coolant, and avoid dead corners where liquid accumulates.

[0104] In some embodiments, such as Figure 3 As shown, the housing assembly 201 has a housing wall, and the liquid cooling section 1 is part of the housing wall.

[0105] In this configuration, the liquid cooling section 1 directly serves as the second bottom wall 202 or the second side wall 204 of the housing assembly 201, meaning that a cooling channel 11 is provided within the second bottom wall 202 or the second side wall 204. Specifically, the first bottom wall 16 of the liquid cooling section 1 can be part of the second bottom wall 202 of the housing assembly 201, and / or, the first side wall 12 of the liquid cooling section 1 can be part of the second side wall 204 of the housing assembly 201. The liquid cooling section 1 is integrally formed with the second bottom wall 202 or the second side wall 204. This structure is suitable for profile housing assemblies 201, where each wall of the profile housing assembly 201 can be integrally formed through processes such as extrusion and rolling to create a solid or hollow profile with a specific cross-section. For hollow profiles, the internal cavity can serve as the cooling channel 11.

[0106] In this embodiment, the drain port 15 is located at the bottom of the first bottom wall 16 or the first side wall 12 of the liquid cooling section 1, so that the coolant can be discharged to the outside of the housing assembly 201 without the need for additional guiding structures to guide the coolant to the outside of the housing assembly 201. Moreover, by integrating the liquid cooling section 1 with the housing wall, the structure can be made more compact, reducing the installation space, or the energy density can be increased when the size of the battery device 200 is fixed.

[0107] In some embodiments, the housing assembly 201 has a housing wall, and the liquid cooling section 1 is independently disposed on the housing wall.

[0108] For example, the liquid cooling section 1 is disposed as an independent component on the second bottom wall 202 or the second side wall 204 of the housing assembly 201. The liquid cooling section 1 can be disposed flush against the housing wall or spaced apart from the housing wall. This arrangement can solve the problem that it is inconvenient to process the cooling channels 11 in the sheet metal housing assembly 201, and it can also be applied to the profile housing assembly 201 formed by splicing multiple machined plates.

[0109] In this embodiment, the liquid cooling unit 1 is installed as a separate component, allowing for independent and flexible adjustment of its installation posture, such as a slight tilt, to ensure that the drain port 15 is at the lowest position of the liquid cooling unit 1. This ensures more thorough drainage of the coolant during maintenance or transportation. Furthermore, if a problem occurs with the liquid cooling unit 1, it can be directly removed for replacement or repair, with the casing wall serving only a supporting and fixing function.

[0110] Furthermore, the liquid cooling unit 1 may vibrate due to fluid flow during operation. This structure can isolate the vibration by setting a buffer structure to prevent the vibration from being transmitted to the housing assembly 201 and causing leakage at the drain port 15. The liquid cooling unit 1 and the housing assembly 201 have independent heat dissipation, so the sealing performance of the drain port 15 will not be affected by large temperature changes of the housing wall.

[0111] In some embodiments, the liquid cooling section 1 is located inside the housing assembly 201, and the housing wall is provided with an opening 203, which is configured to allow the liquid discharged from the drain port 15 to flow out to the outside of the housing assembly 201.

[0112] like Figure 4 As shown, the liquid cooling section 1 is located inside the housing assembly 201. An opening 203 is provided on the second bottom wall 202 or the second side wall 204, allowing liquid discharged from the drain port 15 to flow out to the outside of the housing assembly 201. The connection between the liquid cooling section 1 and the opening 203 is sealed to prevent coolant from entering between the housing assembly 201 and the liquid cooling section 1 when discharged through the drain port 15. The inner side of the housing assembly 201 is the side closest to the battery cell 100. The outside of the housing assembly 201 can be a container for receiving external environmental conditions or for maintenance purposes.

[0113] In this embodiment, the liquid cooling section 1 is located inside the housing assembly 201, which provides better cooling for the individual battery cells 100 and prevents the liquid cooling section 1 from deforming or breaking due to vibration and bumps during operation of the battery device 200, thus improving cooling reliability. When it is necessary to release the coolant in the liquid cooling section 1, the liquid can be easily discharged to the outside of the housing assembly 201 through the opening 203.

[0114] Alternatively, the liquid cooling section 1 can be located on the outside of the housing assembly 201. The liquid cooling section 1 can be fitted to the outside of the second bottom wall 202 or the second side wall 204 of the housing assembly 201, for example, covering the area of ​​the housing wall corresponding to the battery cell 100. The outside of the housing assembly 201, the outside of the second bottom wall 202, and the outside of the second side wall 204 are all sides away from the battery cell 100.

[0115] In this embodiment, the liquid cooling unit 1 is located on the outside of the housing assembly 201. If the liquid cooling unit 1 fails, it can be easily replaced or removed for repair without disassembling the housing assembly 201. Furthermore, a suitable liquid cooling unit 1 can be selected based on the operating environment of the battery device 200. Moreover, the drain port 15 is completely located outside the housing assembly 201, eliminating the need for a connection or sealing structure between the drain port 15 and the housing assembly 201. The discharged coolant will not affect the internal structure of the housing assembly 201, thus avoiding any impact on the reliability of the battery device 200.

[0116] In some embodiments, such as Figure 5 As shown, the liquid cooling section 1 has a cylindrical section 3 around the drain port 15. The cylindrical section 3 extends toward the outside of the liquid cooling section 1. The sealing assembly 2 includes a first sealing member 21. At least a portion of the first sealing member 21 is embedded in the cylindrical section 3 to seal the drain port 15.

[0117] This structural design is applicable to situations where the drain outlet is located on both the first bottom wall 16 and the first side wall 12 of the liquid cooling section 1. The outer side of the liquid cooling section 1 is the side furthest from the battery cell 100. For example, Figure 5 The drain outlet 15 is located on the first bottom wall 16, and the cylindrical portion 3 extends in a direction away from the battery cell 100, that is, downward. The wall thickness of the cylindrical portion 3 may be the same as that of the first bottom wall 16 or the first side wall 12.

[0118] This embodiment provides a cylindrical portion 3 around the drain port 15 outside the liquid cooling section 1, which allows at least a portion of the first sealing member 21 to be embedded in the cylindrical portion 3 to form a mating section, thereby improving the connection reliability between the first sealing member 21 and the cylindrical portion 3. This prevents leakage caused by the first sealing member 21 coming off during normal operation of the battery device 200. When maintenance or transportation is required, the first sealing member 21 can be easily removed to drain the liquid.

[0119] In some embodiments, the first sealing member 21 includes a rod 211 and a head 212, the rod 211 being embedded in the cylindrical portion 3, and the head 212 abutting against one end of the cylindrical portion 3 away from the interior of the housing assembly 201.

[0120] For example, the first sealing element 21 is a sealing bolt, with the rod portion 211 having external threads and the cylindrical portion 3 having internal threads, and the first sealing element 21 and the cylindrical portion 3 are connected by threads. Alternatively, the first sealing element 21 is elastic, so as to connect with the cylindrical portion 3 by interference fit.

[0121] For example, the end face of the head 212 abuts against the end face of the cylindrical portion 3 away from the interior of the housing assembly 201. The interior of the housing assembly 201 is a receiving space enclosed by the walls of the housing assembly 201, providing a mounting carrier for components such as battery cells and liquid cooling components. The outer wall of the head 212 may extend beyond the outer wall of the cylindrical portion 3.

[0122] The first sealing member 21 in this embodiment can seal the drain port 15 through the cooperation of the rod portion 211 and the cylindrical portion 3. Even if liquid leaks through the gap between the rod portion 211 and the cylindrical portion 3, the head 212 abutting against the outer end of the cylindrical portion 3 can prevent the liquid from flowing out, achieving a better sealing effect. Moreover, the head 212 can also limit the extreme position of the first sealing member 21 during installation, making it easier to install the first sealing member 21 in place.

[0123] In some embodiments, such as Figure 6 As shown, the cylindrical portion 3 has an annular extension 4 at one end away from the interior of the housing assembly 201. The extension 4 extends outward in a circumferential direction toward the cylindrical portion 3, and the head 212 abuts against the outer side of the extension 4.

[0124] The outer end of the cylindrical portion 3 refers to the end of the cylindrical portion 3 that is away from the battery cell 100, or the end of the cylindrical portion 3 that is away from the interior of the housing assembly 201. The circumferential outer side of the cylindrical portion 3 can be the surrounding area away from the hollow cavity of the cylindrical portion 3 itself. The outer side of the extension 4 refers to the side of the extension 4 that is away from the battery cell 100.

[0125] For example, the outer wall of the head 212 is flush with the outer wall of the cylindrical portion 3, or the outer wall of the head 212 extends beyond the outer wall of the cylindrical portion 3, or the outer wall of the cylindrical portion 3 extends beyond the outer wall of the head 212. The extension 4 can be annular, and the extension 4 is spaced apart from the wall of the liquid cooling portion 1 where the drain port 15 is provided. The inner hole of the cylindrical portion 3 serves as the drain port 15.

[0126] This embodiment increases the support area of ​​the head 212 by providing an extension 4 on the outside of the cylindrical part 3. When the battery device 200 is working normally, it prevents the cantilever of the head 212 from being dislodged by other external forces, thereby improving the reliability of the first sealing member 21 in achieving the sealing.

[0127] In some embodiments, such as Figure 4 As shown, the housing assembly 201 has a housing wall, which includes a second bottom wall 202. The liquid cooling part 1 is disposed on the inner side of the second bottom wall 202. The second bottom wall 202 is provided with an opening 203. The circumferential outer wall of the extension part 4 is sealed to the opening 203.

[0128] Since the extension 4 is connected to the cylindrical part 3 and the extension 4 is aligned with the inner wall of the opening 203 on the second bottom wall 202, the liquid cooling part 1 and the second bottom wall 202 are spaced apart to form a gap space. To prevent coolant from entering the gap space through the gap between the extension 4 and the second bottom wall 202 during drainage, sealant, gaskets, etc., can be provided between the circumferential outer wall of the extension 4 and the opening 203. Furthermore, sealant, gaskets, etc., can also be provided between the second bottom wall 202 and the first bottom wall 16 in the area where the opening 203 is located.

[0129] The inner side of the second bottom wall 202 refers to the side of the second bottom wall 202 that is closer to the battery cell 100.

[0130] In this embodiment, the liquid cooling section 1 is disposed inside the second bottom wall 202. The liquid cooling section 1 is connected to the second bottom wall 202 through the circumferential outer wall of the extension section 4 and the opening 203. This allows the liquid to flow out from the drain port 15 to the outside of the housing assembly 201. The circumferential outer wall of the extension section 4 is sealed to the opening 203, preventing the outflowing liquid from flowing back into the housing assembly 201 and improving the reliability of the battery device 200.

[0131] In some embodiments, the casing wall includes a second sidewall 204, a liquid cooling section 1 is disposed inside the second sidewall 204, and an opening 203 is provided on the second sidewall 204. The drain port 15 is connected to the opening 203 through a liquid guide pipe. The second sidewall 204 is disposed adjacent to the second bottom wall 202. For example, for a cuboid battery device 200, the second bottom wall 202 is located at the bottom of the battery cell 100, and the four second sidewalls 204 form a rectangle, surrounding all the battery cells 100.

[0132] The inner side of the second sidewall 204 refers to the side of the second sidewall 204 that is closer to the battery cell 100.

[0133] For example, a connector, such as a metal connector, can be provided at the opening 203 on the second sidewall 204. The inner end of the connector can be connected to the drain port 15 through a flexible liquid guide tube, and the outer end of the connector can be sealed by a plug, such as a rubber plug.

[0134] In this embodiment, when there is a certain gap between the second side wall 204 of the housing assembly 201 and the liquid cooling part 1, the liquid can be discharged to the outside of the housing through the liquid guide pipe.

[0135] In some embodiments, such as Figure 6 As shown, the liquid cooling assembly also includes at least one of a seal 5 and a gasket, which are located between the extension 4 and the head 212.

[0136] For example, the seal 5 can be a sealing ring, and a groove can be provided on the extension 4. The seal 5 is located in the groove. When the first sealing member 21 is a sealing bolt, the seal 5 can be pressed by tightening the sealing bolt. When a gasket is provided, the gasket can be placed on the extension 4, and the seal 5 is placed on the gasket. The head 212 presses the seal 5.

[0137] This embodiment improves the reliability of the first sealing element 21 installed within the cylindrical portion 3 by providing at least one of the sealing element 5 and the gasket. Providing both the gasket and the sealing element 5 simultaneously enhances leak-proof performance.

[0138] In some embodiments, the first sealing member 21 is a sealing bolt, with the rod portion 211 having external threads and the cylindrical portion 3 having internal threads; or

[0139] like Figure 7 As shown, the first sealing member 21 is elastic, and the sealing assembly 2 also includes a blocking part 213. The blocking part 213 is connected to the end of the rod part 211 away from the head 212, and the blocking part 213 abuts against the wall surface adjacent to the inner cavity of the liquid cooling part 1 and the drain port 15.

[0140] For example, when the first sealing element 21 is a sealing bolt, standard threads (such as G threads, NPT threads) or custom threads can be used for easy installation and sealing. The head 212 can be designed as a hexagonal head or internal hexagonal structure suitable for general-purpose wrenches, allowing for wrench disassembly. To improve the sealing performance, waterproof tape can be wrapped around the rod 211, or a tapered thread (such as an NPT tapered thread) can be used, or thread sealant (such as anaerobic adhesive) can be applied.

[0141] For example, when the first sealing element 21 is an elastic element, it can be made of rubber, such as PVC, which has a wide temperature resistance range (-50°C to 200°C) and is suitable for most liquid cooling systems. This type of first sealing element 21 can be pried open when drainage is required, and a new first sealing element 21 can be used after the liquid is replaced. For example, the sealing element 5 is a sealing ring, and when selecting it, the groove size and compression amount need to be matched. For example, the compression amount is 15%-30% of the diameter of the sealing ring. The inner cavity of the liquid cooling section 1 can be a closed space formed by the wall of the liquid cooling section 1, which is used to contain the coolant and provide a channel for the flow of the coolant to achieve heat exchange for components such as the battery cell 100; the inner cavity is connected to the drain port 15, and the wall surface at the junction of the two is the abutment mating surface of the blocking part 213.

[0142] If the first sealing element 21 in this embodiment is a sealing bolt, it has high strength, good reliability, and good temperature and corrosion resistance. Since the sealing bolt is easy to disassemble, it is suitable for occasions with frequent disassembly. If an elastic element is used, the first sealing element 21 can be pulled out when liquid needs to be drained, and can be inserted after the liquid is drained. This allows for quick insertion and removal, reducing maintenance time. Since the first sealing element 21 and the cylindrical part 3 are interference fit, a better sealing effect can be obtained. The blocking part 213 abuts against the wall surface adjacent to the inner cavity of the liquid cooling part 1 and the drain port 15, which can prevent the first sealing element 21 from being accidentally dislodged. However, since it is elastic, it can also be dislodged from the drain port 15 when external force is applied.

[0143] In some embodiments, such as Figure 9 As shown, the first sealing member 21 is provided with a through hole 214, and the liquid cooling assembly also includes a negative pressure suction tube 6. The negative pressure suction tube 6 is disposed in the inner cavity of the liquid cooling part 1 and one end is connected to the inner end of the through hole 214. The sealing assembly 2 also includes a second sealing member 22, which is configured to close the outer end of the through hole 214.

[0144] For example, the first sealing element 21 is an elastic element, such as rubber, which facilitates the connection of the negative pressure suction tube 6. The second sealing element 22 may include a connecting plug and a limiting part. The plug is embedded in the through hole 214, and the limiting part abuts against the head 212. When drainage is required, the second sealing element 22 can be removed and connected to the through hole 214 through an external negative pressure source.

[0145] For example, the rod portion 211 of the first sealing member 21 is cylindrical, and the through hole 214 is located in the central region of the first sealing member 21 along its axis.

[0146] The inner end of the through hole 214 can refer to the end of the through hole 214 that is connected to the inner cavity of the liquid cooling section 1; the outer end of the through hole 214 can refer to the end of the through hole 214 that is away from the liquid cooling section 1.

[0147] This embodiment takes into account the possibility of liquid accumulation dead zones within the liquid cooling section 1 due to flow channel corners or other reasons. In addition to gravity-based liquid drainage, a negative pressure suction pipe 6 is installed to apply negative pressure and actively remove residual liquid, resulting in more thorough drainage. Furthermore, long-term operation of the liquid cooling section 1 may generate impurities such as metal shavings. If these accumulate within the cooling flow channel 11, they can scratch the inner wall of the cooling flow channel 11 and affect cooling efficiency. The negative pressure action can remove these impurities from the liquid cooling section 1.

[0148] In addition, the cooperation of the two sealing components can improve the reliability of the seal. If one sealing component experiences a slight leak, the other sealing component can slow down the leakage rate. When negative pressure drainage is required, only the second sealing component 22 needs to be removed, without disassembling the first sealing component 21. This avoids wear caused by frequent disassembly of the first sealing component 21 and ensures the sealing performance.

[0149] Embodiments of this application also provide an electrical device, including the battery device provided in any of the above embodiments, the battery device being used to provide electrical energy.

[0150] In the above technical solution, the electrical equipment can achieve the same technical effect as the battery device provided in the above embodiments.

[0151] Some specific examples will be given below.

[0152] Figure 3 This is a schematic diagram of the structure of the battery device 200 according to the first embodiment of this application. A cooling channel 11 is provided inside the second bottom wall 202 of the housing assembly 201. An inlet 13 and an outlet 14 are provided at one end of the upper surface of the second bottom wall 202 along a second direction y (e.g., the length direction of the battery device 200). The inlet 13 and outlet 14 are spaced apart along a first direction x (e.g., the width direction of the battery device 200). The first direction x is perpendicular to the second direction y, and a third direction z (e.g., the thickness direction of the battery device 200) is perpendicular to both the first direction x and the second direction y. A drain port 15 is provided on the lower surface of the second bottom wall 202, and a cylindrical portion 3 is provided around the drain port 15 on the outer side of the second bottom wall 202. An extension portion 4 is provided at the end of the cylindrical portion 3, and a first sealing member 21 is embedded in the inner hole of the cylindrical portion 3 to achieve sealing.

[0153] exist Figure 3In the battery device 200, different installation methods of the sealing component 2 are given below.

[0154] Figure 5 This is an installation diagram of the first embodiment of the sealing component 2. The sealing component 2 includes a first sealing member 21, which is a sealing bolt. The rod portion 211 is threadedly engaged with the cylindrical portion 3, and the head 212 abuts against the end of the cylindrical portion 3.

[0155] Figure 6 This is an installation diagram of the second embodiment of the sealing component 2. An extension 4 is provided on the radially outer side of the end of the cylindrical part 3. The first sealing member 21 is a sealing bolt. The rod part 211 is threadedly engaged with the cylindrical part 3. The head 212 abuts against the end of the extension 4, and a sealing member 5 is provided between the head 212 and the extension 4.

[0156] Figure 7 This is an installation diagram of the third embodiment of the sealing component 2. The first sealing member 21 is an elastic member, and the inner end of the rod 211 is connected to the blocking part 213. The blocking part 213 abuts against the wall surface adjacent to the inner cavity of the liquid cooling part 1 and the drain port 15.

[0157] Figure 8 This is an installation diagram of the fourth embodiment of the sealing component 2. The second bottom wall 202 has an opening 203, and the extension 4 is inserted into the opening 203 and sealed. The extension 4 can be aligned with both sides of the second bottom wall 202 along the third direction z.

[0158] Figure 9 This is a schematic diagram of the installation of the fifth embodiment of the sealing assembly 2. The sealing assembly 2 includes a first sealing member 21 and a second sealing member 22, both of which can be elastic elements, such as rubber elements. The first sealing member 21 has a through hole 214 along its axis. The liquid cooling assembly also includes a negative pressure suction tube 6, which is disposed in the inner cavity of the liquid cooling part 1 and one end is connected to the inner end of the through hole 214. The sealing assembly 2 also includes a second sealing member 22, which is configured to close the outer end of the through hole 214.

[0159] Figure 4 This is a schematic diagram of the structure of the second embodiment of the battery device 200 of this application, and... Figure 3The difference lies in that the liquid cooling section 1 is located inside the second bottom wall 202, and the top of the liquid cooling section 1 is provided with an inlet 13 and an outlet 14 at one end along the second direction y (e.g., the length direction of the battery device 200), and the inlet 13 and outlet 14 are spaced apart along the first direction x (e.g., the width direction of the battery device 200). The first bottom wall 16 of the liquid cooling section 1 is provided with a drain port 15, and the outer side of the first bottom wall 16 is provided with a cylindrical part 3 around the drain port 15. The end of the cylindrical part 3 is provided with an extension 4, and the second bottom wall 202 is provided with an opening 203. The extension 4 is sealed with the inner sidewall of the opening 203, and the first sealing member 21 is embedded in the inner hole of the cylindrical part 3 to achieve sealing.

[0160] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. 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 by, The application relates to a battery device, comprising: a box assembly (201); and a liquid cooling assembly arranged in the box assembly (201), the liquid cooling assembly comprising a liquid cooling part (1) and a blocking assembly (2), the liquid cooling part (1) being provided with a cooling flow channel (11) and a liquid inlet (13), a liquid outlet (14) and a liquid discharge outlet (15) in communication with the cooling flow channel (11), the liquid discharge outlet (15) being located at a region of the liquid cooling part (1) with the lowest position along the gravity direction when the battery device is in an installed state, the blocking assembly (2) being configured to block the liquid discharge outlet (15) and being operable to unblock the liquid discharge outlet (15) to realize liquid discharge. The liquid cooling part (1) is provided with a cylindrical part (3) around the liquid discharge outlet (15), the cylindrical part (3) extending towards the outside of the liquid cooling part (1), the blocking assembly (2) comprising a first blocking member (21), at least a part of the first blocking member (21) being embedded in the cylindrical part (3) to block the liquid discharge outlet (15). The liquid cooling part (1) comprises a first bottom wall (16) and a first side wall (12) adjacent to the first bottom wall (16), and the liquid discharge outlet (15) is arranged in at least one of the first bottom wall (16) and the first side wall (12).

2. The battery device according to claim 1, characterized by The liquid cooling part (1) is arranged in an inclined manner as a whole.

3. The battery device of claim 1, wherein The box assembly (201) has a box wall, and the liquid cooling part (1) is arranged as a part of the box wall.

4. The battery device of claim 1, wherein The box assembly (201) has a box wall, and the liquid cooling part (1) is arranged independently on the box wall.

5. The battery device of claim 1, wherein The liquid cooling part (1) is arranged on the inside of the box assembly (201), and the box wall is provided with an opening (203) configured to allow the liquid discharged from the liquid discharge outlet (15) to flow out to the outside of the box assembly (201).

6. The battery device of claim 5, wherein, The first blocking member (21) comprises a rod part (211) embedded in the cylindrical part (3) and a head part (212) abutting against one end of the cylindrical part (3) away from the inside of the box assembly (201).

7. The battery device of claim 1, wherein One end of the cylindrical part (3) away from the inside of the box assembly (201) is provided with an annular extension part (4) extending towards the circumferential outside of the cylindrical part (3), and the head part (212) abuts against the outside of the extension part (4).

8. The battery device of claim 7, wherein, The box assembly (201) has a box wall, 9. The battery device of claim 8, wherein the box wall comprises a second bottom wall (202), the liquid cooling part (1) is arranged on the inside of the second bottom wall (202), the second bottom wall (202) is provided with an opening (203), and the circumferential outside wall of the extension part (4) is in sealing cooperation with the opening (203); and / or the box wall comprises a second side wall (204), the liquid cooling part (1) is arranged on the inside of the second side wall (204), the second side wall (204) is provided with an opening (203), and the liquid discharge outlet (15) is in communication with the opening (203) through a liquid guide pipe. ​ 10. The battery device of claim 8, wherein The liquid cooling assembly further comprises at least one of a seal (5) and a gasket, the seal (5) and the gasket being located between the extension (4) and the head (212).

11. The battery device according to any one of claims 7-10, characterized in that, The first plugging member (21) is a plugging bolt, the rod portion (211) is provided with an external thread, and the cylindrical portion (3) is provided with an internal thread; or The first plugging member (21) is elastic, the plugging assembly (2) further comprises a blocking portion (213), the blocking portion (213) is connected to one end of the rod portion (211) away from the head (212), and the blocking portion (213) abuts against a wall surface of the inner cavity of the liquid cooling portion (1) adjacent to the liquid discharge port (15).

12. The battery device according to any one of claims 7 to 10, wherein The first plugging member (21) is provided with a through hole (214), the liquid cooling assembly further comprises a negative pressure suction tube (6), the negative pressure suction tube (6) is arranged in the inner cavity of the liquid cooling portion (1) and one end of the negative pressure suction tube (6) communicates with an inner end of the through hole (214), the plugging assembly (2) further comprises a second plugging member (22), and the second plugging member (22) is configured to close an outer end of the through hole (214).

13. An electrical device, characterized by The battery device according to any one of claims 1-12 is used to provide electric energy to the electric equipment.

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