Battery device, electric device, and joint assembly

Abstract

The application discloses a battery device, an electric device and a joint assembly, and relates to the technical field of batteries; the battery device comprises at least one of a device main body, a first joint and a second joint, the device main body is configured with a heat exchange channel for heat exchange with a battery monomer; the first joint and the second joint are detachably connected; the first joint and the second joint are each provided with a flow channel, and each flow channel is provided with a valve core for opening or closing the corresponding flow channel; in the case where the first joint and the second joint are separated, the valve cores respectively close the corresponding flow channels; the technical scheme of the application can alleviate the problem that, in the case where the connecting port of the heat exchange channel and the external pipeline are separated, the heat exchange medium overflows and leaks, and other battery devices or components in the electric cabinet are polluted.

Description

Technical Field

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

[0002] Rail trains are transportation systems that rely on fixed tracks, encompassing types such as subways, light rail, and railways. Rail trains are primarily electrically powered and, through fully enclosed or semi-independent right-of-way designs, achieve efficient, safe, and environmentally friendly transportation services. They form the backbone of urban and intercity public transportation networks and are of great significance in alleviating traffic congestion and optimizing urban layout.

[0003] The main components of a railcar include a power supply system. The electrical cabinet (usually a power distribution cabinet or low-voltage distribution cabinet) is the equipment of this power supply system, responsible for the power distribution and control of the vehicle system. The electrical cabinet includes a cabinet body, which typically houses one or more battery units. In embodiments with multiple battery units, these units may be stacked within the cabinet. Each battery unit typically includes one or more battery cell assemblies, which in turn typically include one or more individual battery cells. To improve the reliability and stability of the battery units, heat exchange channels are usually provided within them. These channels are typically connected to external pipelines, allowing external heat exchange media to enter and exchange heat with the battery cells, thereby regulating the operating temperature of the individual battery cells.

[0004] In scenarios where battery devices need to be repaired, the connection port of the heat exchange channel needs to be separated from the external pipeline. However, in the existing technical solutions, the above-mentioned repair scenarios have the problem of heat exchange medium leakage, which can lead to secondary faults such as short circuits, corrosion or insulation failure in other battery devices or components in the cabinet. Utility Model Content

[0005] In view of the above problems, this application provides a battery device, electrical equipment and connector assembly, which aims to alleviate the problem of secondary failures such as short circuits, corrosion or insulation failure of other battery devices or components in the electrical cabinet caused by heat exchange medium overflow and leakage in maintenance scenarios.

[0006] In a first aspect, this application provides a battery device, including a device body and a connector assembly. The device body includes a battery cell and is configured with a heat exchange channel for exchanging heat with the battery cell. The heat exchange channel has a connection port. The connector assembly includes a detachably connected first connector and a second connector. One of the first connector and the second connector is connected to the connection port, and the other is configured to connect to an external pipeline. Both the first connector and the second connector are provided with flow channels, and each flow channel is provided with a valve core for opening or closing the corresponding flow channel. When the first connector and the second connector are separated, the valve cores respectively close the corresponding flow channels.

[0007] The technical solution of this application incorporates valve cores in both the flow channels of the first and second joints for opening or closing corresponding flow channels. This allows the corresponding flow channels to be closed when the two joints are separated. Applying this solution to the electrical cabinet of a railcar, when maintenance of the battery devices is required, the valve cores inside the two joints can close their respective flow channels the instant the first and second joints separate, directly blocking the path of the heat exchange medium flowing out from the disconnected joints. This reduces the likelihood of heat exchange medium dripping or splashing onto adjacent battery devices or components (electrical connectors, wiring harnesses, or control units), thereby reducing secondary faults such as short circuits, corrosion, and insulation failure in nearby battery devices or components. Furthermore, the technical solution of this application reduces the steps and time required for handling heat exchange medium leaks and cleaning contaminants during maintenance, lowering the risk of maintenance personnel coming into contact with chemical media.

[0008] In some embodiments, the battery device includes a device body and a second connector. The device body includes a battery cell and is configured with a heat exchange channel for exchanging heat with the battery cell. The heat exchange channel has a connection port. The second connector is disposed on the device body and communicates with the connection port. The second connector is configured to be detachably connected to a first connector, and the first connector is configured to connect to an external pipeline. Both the first connector and the second connector are provided with flow channels, and each flow channel is provided with a valve core for opening or closing the corresponding flow channel. When the first connector and the second connector are separated, the valve cores respectively close the corresponding flow channels.

[0009] Based on the same inventive concept, since the first connector and the second connector are detachably connected, in the actual product, the battery device may include the device body, one of the first connector and the second connector, one of the first connector and the second connector being a male connector and the other being a female connector; in this embodiment, it is applied to the electrical cabinet of the rail train, and has all the advantages of the previous embodiment, which will not be repeated here.

[0010] In some embodiments, the first connector is provided with a plug-in interface, and a sealing ring is provided in the flow channel of the first connector. A valve core disposed in the first connector is located on the side of the sealing ring away from the plug-in interface. The second connector can be inserted into the flow channel of the first connector through the plug-in interface, and the flow channels in the first connector and the second connector are interconnected. The sealing ring is configured to seal the gap at the plug-in mating position of the first connector and the second connector.

[0011] In this embodiment, a valve core for opening or closing the corresponding flow channel is provided in each flow channel, so that the two connectors can close the corresponding flow channel when they are separated. Furthermore, a sealing ring is provided between the valve core and the insertion interface in the first connector, so that when the two connectors switch from the separated state to the connected state, the sealing ring first seals the insertion and mating position of the first and second connectors, and then the first and second flow channels are connected. When the two connectors switch from the connected state to the separated state, the first and second flow channels are first closed, and then the seal between the mating positions of the first and second connectors is released. When this solution is applied to the electrical cabinet of a railcar, when the battery device needs to be maintained, a sealing barrier is maintained for at least a certain distance when the two connectors switch between the separated and connected states, further reducing the problem of heat exchange medium leakage during the switching process between the separated and connected states.

[0012] In some embodiments, the flow channel within the first connector is a first flow channel, and the valve core within the first flow channel is a first valve core; the flow channel within the second connector is a second flow channel, and the valve core within the second flow channel is a second valve core; the first valve core has a first abutting surface, and the second valve core has a second abutting surface that mates with the first abutting surface; the first connector is provided with a plug-in interface, and the second connector can be inserted into the first connector through the plug-in interface, wherein the first abutting surface and the second abutting surface abut against each other to make the first flow channel and the second flow channel interconnected; the connector assembly further includes a sealing ring, the sealing ring being disposed around the second connector, and the sealing ring being configured to seal the gap at the insertion and mating position of the first connector and the second connector; the distance between the first abutting surface and the end face where the plug-in interface is located is a first distance, and the distance between the sealing ring and the second abutting surface is a second distance; the first distance is greater than the second distance.

[0013] In the previous embodiment, the sealing ring was built into the first flow channel. Based on the same inventive concept, in this embodiment, the sealing ring can be arranged around the outer wall of the second joint. In this embodiment, it is applied to the electrical cabinet of the railcar and has all the advantages of the previous embodiment, which will not be repeated here.

[0014] In some embodiments, the flow channel within the first connector is a first flow channel, and the valve core within the first flow channel is a first valve core; a gap is provided between the sealing ring and the first valve core along the extending direction of the first flow channel. In this embodiment, the coverage time of the sealing barrier can be extended without changing the size of the sealing ring, thereby improving the leak-proof performance of the two connectors during state switching.

[0015] In some embodiments, a gap is provided between the sealing ring and the insertion interface along the extension direction of the first flow channel. In this embodiment, the second connector is not subjected to friction or resistance from the sealing ring during initial insertion, improving operational convenience.

[0016] In some embodiments, the distance between the sealing ring and the insertion interface is greater than the distance between the sealing ring and the first valve core. This embodiment reduces unnecessary wear during the insertion process and lowers maintenance costs.

[0017] In some embodiments, along the extension direction of the first flow channel, the first flow channel includes a first segment, a second segment, and a third segment arranged sequentially; the flow area of ​​the first flow channel in the first segment is greater than the flow area of ​​the first flow channel in the second segment; the flow area of ​​the first flow channel in the third segment is greater than the flow area of ​​the first flow channel in the second segment; the sealing ring is disposed in the second segment, and the first valve core is confined in the third segment. This embodiment's solution can balance the effective flow area of ​​the first flow channel, reducing the impact of sudden changes in fluid velocity at local locations on the valve core's operation.

[0018] In some embodiments, the inner sidewall of the second segment is provided with a mounting groove, which extends circumferentially along the first flow channel; the sealing ring is disposed in the mounting groove, and a portion of the sealing ring protrudes outside the mounting groove. In this embodiment, the sealing ring is disposed in the mounting groove for easy replacement.

[0019] In some embodiments, the first valve core includes a first piston, a first elastic element, and a push rod; the push rod is installed in the first flow channel, the first elastic element is annularly disposed on the push rod, and the first piston is movably switchable between an open position and a closed position within the first flow channel; the flow channel of the second connector is a second flow channel, and the valve core disposed within the second flow channel is a second valve core, the second valve core including a second piston and a second elastic element, the second piston being movably switchable between an open position and a closed position within the second flow channel; when the second connector is inserted into the first connector, the second connector and the first piston abut against each other, the first piston is in the open position, and the first elastic element is in an energy-storing state; the push rod and the second piston abut against each other, the second piston is in the open position, and the second elastic element is in an energy-storing state; when the second connector and the first connector are separated, the first elastic element releases its energy to reset the first piston to the closed position, and the second elastic element releases its energy to reset the second piston to the closed position. The technical solution of this embodiment, through automated reset of the flow channel, reduces the complexity of manual operation and improves the ease of use of the connector assembly.

[0020] In some embodiments, the push rod includes a rod body and a rod cap disposed on the rod body. The first piston is sealed to the inner wall of the first flow channel, and the first piston has a first through hole. In the closed position, the rod cap and the first piston are sealed to the first through hole to close the first through hole. In the open position, the first piston disengages from the rod cap to open the first through hole. This embodiment has the advantages of simple operation, compact structure, and low maintenance cost.

[0021] In some embodiments, the first valve core further includes a mounting bracket disposed within the first flow channel, and the end of the rod body away from the rod cap is mounted on the mounting bracket; the first elastic element is annularly disposed on the rod body and confined between the first piston and the mounting bracket. This embodiment improves the reliability of the first valve core.

[0022] In some embodiments, the mounting bracket includes a mounting cylinder and a plurality of support arms disposed on the outer wall of the mounting cylinder, the plurality of support arms being arranged at circumferential intervals along the mounting cylinder; the end of the rod away from the rod cap is inserted into the mounting cylinder. The solution in this embodiment has a simple structure and enhances the installation stability of the first valve core.

[0023] In some embodiments, the first connector includes a first pipe fitting and a first plug fitting. The first plug fitting is sealed and inserted into the first pipe fitting to form the first flow channel. The insertion port is located in the first plug fitting. The first pipe fitting has a limiting step located within the first flow channel. The support arm abuts against the limiting step and the first plug fitting. In this embodiment, the first pipe fitting and the first plug fitting can be directly selected from existing pipe connectors and quick-connect fittings, resulting in a simple structure and low cost.

[0024] In some embodiments, the second connector includes a second pipe fitting and a second plug fitting, the second plug fitting being sealed and inserted into the second pipe fitting to form the second flow channel; the second plug fitting can be inserted into the first plug fitting from the insertion port, and the sealing ring is configured to seal the gap between the first plug fitting and the second plug fitting. In this embodiment, the second pipe fitting and the second plug fitting can be directly selected from existing pipe fittings and quick-connect couplings, resulting in a simple structure and low cost.

[0025] In some embodiments, the outer wall of the second pipe fitting is provided with a first protrusion, and the first protrusion and the device body are connected by fasteners. This embodiment enhances the stability and robustness of the connection between the second connector and the device body by providing a first protrusion on the outer wall of the second pipe fitting.

[0026] In some embodiments, the first connector has a bayonet, and the outer wall of the second connector has a slot; the connector assembly further includes a snap-fit ​​element that can simultaneously engage with both the bayonet and the slot. In this embodiment, the reinforcement structure of the first and second connectors is simple and easy to operate.

[0027] In some embodiments, the first connector has two opposing bayonets, both of which extend circumferentially along the first connector; the snap-fit ​​component includes two opposing snap-fit ​​arms and an operating part connected to one end of each snap-fit ​​arm; the operating part is located on the outside of the first connector; each snap-fit ​​arm can be snapped into the slot from one of the bayonets. The reinforced fixing structure of the first and second connectors in this embodiment has the advantages of simple structure, stable connection, easy and quick operation, and convenient maintenance or replacement.

[0028] In some embodiments, each of the two snap-fit ​​arms has a retaining portion at its end away from the operating part; when the two snap-fit ​​arms are snapped into place one-to-one with the two bayonets, the retaining portion is held against the outer side wall of the first connector. This embodiment enhances the stability of the snap-fit ​​between the snap-fit ​​member and the first connector by providing a retaining portion at the end of the snap-fit ​​arm away from the operating part, and further improves the connection reliability of the first connector and the second connector in the connected state.

[0029] In some embodiments, the device body includes a battery case with a receiving cavity in which the individual battery cells are housed; the battery case wall is provided with the heat exchange channel, and the second connector is installed in the battery case. In this embodiment, by embedding the heat exchange channel within the battery case wall, the volume occupied by the thermal management components in the battery device can be reduced.

[0030] In some embodiments, the battery box includes a box body and a box cover. The box body includes a bottom plate, two side plates, and two end plates. The bottom plate has a heat exchange channel inside. The two side plates are respectively located on both sides of the bottom plate in a first direction, and at least one of them is integrally formed with the bottom plate. The two side plates are located on both sides of the bottom plate in a second direction, which intersects the first direction. The bottom plate, the two side plates, and the two end plates are configured to form a receiving groove. The box cover closes to the opening of the receiving groove and, together with the receiving groove, forms the receiving cavity. This embodiment simplifies the number of components, eliminates the welding work of the heat exchange plate, reduces the amount of welding required for the battery device, and provides a higher sealing effect for the heat exchange channel.

[0031] In some embodiments, the bottom plate of the box has a cavity and is open at least one end in the second direction; the cavity has a plurality of first partition plates arranged side by side along the first direction to divide the cavity into a plurality of sub-channels, and the plurality of sub-channels are connected to form the heat exchange channel. In this embodiment, the bottom plate of the box is split into two parts. At this time, the volume of the two parts is relatively small, so they can be formed by a smaller and simpler mold, which improves the convenience of mold manufacturing.

[0032] In some embodiments, the bottom plate of the battery box has a first end and a second end opposite to each other in the second direction, the first end being an opening; the battery box further includes a current collector, the current collector covering the opening of the first end; the current collector is provided with an inlet port and an outlet port, the inlet port and the outlet port being connected to the heat exchange channel; one second connector is installed at the inlet port, and the other second connector is installed at the outlet port.

[0033] This application also proposes an electrical device including the aforementioned battery device.

[0034] In some embodiments, the electrical equipment includes an electrical cabinet, which includes a cabinet body, a plurality of battery devices, and a liquid storage tank, wherein the battery devices are disposed within the cabinet body; the liquid storage tank is connected to the first connector or the second connector via the external pipeline.

[0035] This application also proposes a connector assembly including a first connector and a second connector. The first connector has a first flow channel and a first valve core is disposed within the first flow channel. The first valve core is used to open or close the first flow channel. The second connector has a second flow channel and a second valve core is disposed within the second flow channel. The second valve core is used to open or close the second flow channel. When the first connector and the second connector are separated, the first valve core closes the first connector, and the second valve core closes the second connector.

[0036] In some embodiments, the first connector is provided with an insertion interface communicating with the first flow channel, and a sealing ring is provided in the first flow channel, the sealing ring being located on the side of the first valve core near the insertion interface.

[0037] In some embodiments, the first valve core has a first abutting surface, and the second valve core has a second abutting surface that mates with the first abutting surface; the first connector has a plug-in interface, and the second connector can be inserted into the first connector through the plug-in interface, wherein the first abutting surface and the second abutting surface abut against each other to make the first flow channel and the second flow channel communicate with each other; the outer side wall of the second connector is provided with a sealing ring, which is configured to seal the gap at the insertion and mating position of the first connector and the second connector; the distance between the first abutting surface and the end face where the plug-in interface is located is a first distance, and the distance between the sealing ring and the second abutting surface is a second distance; the first distance is greater than the second distance.

[0038] In some embodiments, the first valve core includes a first piston, a first elastic element, and a push rod; the push rod is installed in the first flow channel, the first elastic element is annularly disposed around the push rod, and the first piston is movably switchable between an open position and a closed position within the first flow channel; the second valve core includes a second piston and a second elastic element, and the second piston is movably switchable between an open position and a closed position within the second flow channel; when the second connector is inserted into the first connector, the second connector abuts against the first piston, the first piston is in the open position, and the first elastic element is in an energy-storing state; the push rod abuts against the second piston, the second piston is in the open position, and the second elastic element is in an energy-storing state; when the second connector and the first connector are separated, the first elastic element releases its energy to reset the first piston to the closed position, and the second elastic element releases its energy to reset the second piston to the closed position.

[0039] The above description is merely an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0041] Figure 1 This is a schematic diagram of the structure of an electrical device according to some embodiments of this application;

[0042] Figure 2 This is a schematic diagram of the structure of a battery device according to some embodiments of this application;

[0043] Figure 3 for Figure 2 Internal schematic diagram of the battery device;

[0044] Figure 4 This is a schematic diagram of the structure of a connector assembly according to some embodiments of this application;

[0045] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the first joint in the middle;

[0046] Figure 6 for Figure 4 Exploded view of the first joint in the middle;

[0047] Figure 7 for Figure 4 A schematic diagram of the cross-sectional structure of the second joint;

[0048] Figure 8 for Figure 4 Exploded view of the second joint;

[0049] Figure 9 for Figure 4 A cross-sectional structural diagram of the joint assembly shows the first joint and the second joint in a separated state;

[0050] Figure 10 for Figure 4 A cross-sectional structural diagram of the joint assembly shows the first and second joints in a pre-connected state;

[0051] Figure 11 for Figure 4A cross-sectional structural diagram of the joint assembly shows the first and second joints in a connected state;

[0052] Figure 12 for Figure 2 A schematic diagram of the battery box without its cover;

[0053] Figure 13 for Figure 12 Exploded view of the battery box;

[0054] Figure 14 for Figure 13 Exploded structural diagram of the bottom plate of the middle box, the current collection component and the sealing component;

[0055] Figure 15 for Figure 14 A magnified view of point A in the diagram;

[0056] The reference numerals in the detailed embodiments are as follows:

[0057] 1000. Vehicle; 100. Battery unit; 101. Unit body; 200. Controller; 300. Motor; 10. Battery box; 11. Box body; 111. Box bottom plate; 111a. Heat exchange channel; 111a1. Sub-channel; 1111. First sub-plate; 1113. Second sub-plate; 11c. First end; 11d. Second end; 111e. Mounting notch; 113. Box side plate; 115. Box end plate; 11a. Receiving groove; 13. Box cover; 10a. Receiving cavity; 15. Current collector; 15a. Liquid inlet; 15b. Liquid outlet; 15c. Mounting hole; 155. Second protrusion; 17. Sealing component; 19. Mounting beam; 20. Battery cell;

[0058] 30. Connector assembly; 31. First connector; 31a. First flow channel; 31a1. First section; 31a2. Second section; 31a3. Third section; 31b. Insertion interface; 31c. Mounting groove; 31d. Bayonet; 311. First pipe fitting; 312. First insertion piece; 32. Second connector; 32a. Second flow channel; 32b. Slot; 321. Second pipe fitting; 322. Second insertion piece; 323. First protrusion; 33. First valve core; 33a. First abutting surface; 331, First piston; 331a, First through hole; 332, First elastic element; 333, Push rod; 3331, Rod body; 3332, Rod cap; 334, Mounting bracket; 3341, Mounting cylinder; 3342, Support arm; 34, Second valve core; 34a, Second abutting surface; 341, Second piston; 342, Second elastic element; 35, Sealing ring; 36, Snap-fit ​​element; 361, Operating part; 362, Snap-fit ​​arm; 363, Buckling part;

[0059] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

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

[0066] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0067] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; they can refer to mechanical connection or electrical connection; they can refer to direct connection or 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.

[0068] Rail trains are transportation systems that rely on fixed tracks, encompassing types such as subways, light rail, and railways. Rail trains are primarily electrically powered and, through fully enclosed or semi-independent right-of-way designs, achieve efficient, safe, and environmentally friendly transportation services. They form the backbone of urban and intercity public transportation networks and are of great significance in alleviating traffic congestion and optimizing urban layout.

[0069] The main components of a rail train include the power supply system. The electrical cabinet (usually referring to a power distribution cabinet or low-voltage distribution cabinet) is the equipment of the power supply system, responsible for the power distribution and control of the vehicle system. The electrical cabinet includes a cabinet body, which typically houses one or more battery devices. In embodiments with multiple battery devices, these devices can be stacked and arranged within the cabinet. Battery devices are devices capable of storing electrical energy, and they are widely used not only in energy storage power systems such as hydroelectric, thermal, wind, and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, electric cars, and rail trains, as well as in other fields.

[0070] The battery device may include a battery case and individual battery cells disposed within the battery case. The battery case may include a casing and a cover that fits over the casing to enclose a cavity for housing the individual battery cells. The individual battery cell is the smallest unit comprising the battery and typically includes a battery casing and an electrode assembly disposed within the battery casing. The electrode assembly is the component in the individual battery cell where the electrochemical reaction actually occurs, and may include a positive electrode, a negative electrode, and a separator located between them, formed by winding or stacking the positive electrode, negative electrode, and separator. The individual battery cell may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. Furthermore, the individual battery cell may be cylindrical, flat, cuboid, or other shapes. In addition, the battery case may contain multiple individual battery cells, which may be connected in series, in parallel, or in a hybrid connection including both series and parallel connections.

[0071] To improve the reliability and stability of battery devices, heat exchange channels are usually installed inside the battery devices. The connection ports of the heat exchange channels are usually connected to external pipelines, allowing external heat exchange media to enter the heat exchange channels so that the heat exchange media flowing through the heat exchange channels can exchange heat with the battery cells, thereby regulating the operating temperature of the battery cells.

[0072] In the electrical cabinet of a railcar with multiple battery units, the applicant discovered during use that when repairing some of the battery units, it was necessary to separate the connection port of the heat exchange channel from the external pipeline. However, during the separation process, there was a problem of heat exchange medium overflow and leakage, which could contaminate other battery units or components in the electrical cabinet.

[0073] Therefore, based on the above considerations, this application proposes a novel battery device in which both the heat exchange channel and the external pipeline are equipped with valve cores at their joints for opening or closing the corresponding flow channels. This allows both joints to close the corresponding flow channels when separated, thereby reducing the dripping or splashing of heat exchange medium onto adjacent battery devices or components (electrical connectors, wiring harnesses, or control units), and thus reducing the occurrence of secondary faults such as short circuits, corrosion, and insulation failure in adjacent battery devices or components.

[0074] Furthermore, it should be noted that the battery device proposed in this application can be applied to electrical devices to provide power to them. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, rail trains, ships, and spacecraft. Further, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., while spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0075] 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.

[0076] Please refer to Figure 1 In one embodiment of this application, the vehicle 1000 can be a rail train, a fuel-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 internally installed in the vehicle 1000, and the battery device 100 can be located at the bottom, head, or tail 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 startup, navigation, and operation.

[0077] In one embodiment of this application, the electrical equipment is a railcar, which includes an electrical cabinet. The electrical cabinet includes a cabinet body, multiple battery devices 100, and a liquid storage tank. The multiple battery devices are located inside the cabinet body, and the liquid storage tank is connected to a first connector 31 or a second connector 32 via an external pipeline.

[0078] In this embodiment, the liquid storage tank can be located inside or outside the cabinet; no specific limitation is made here. Multiple battery devices 100 are housed inside the cabinet. These battery devices 100 can be arranged in a flat or stacked manner. In a stacked arrangement, the cabinet typically has mounting brackets on which the battery devices are mounted. The liquid storage tank is connected to a first connector 31 or a second connector 32 via an external pipeline. In the embodiment where the first connector 31 is mounted on the main body of the battery device 100, the liquid storage tank is connected via the second connector 32. In the embodiment where the second connector 32 is mounted on the main body of the battery device 100, the liquid storage tank is connected via the first connector 31.

[0079] In one embodiment of this application, the battery device 100 can also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000, and can also be used to supply power to electrical appliances on the vehicle 1000.

[0080] Please refer to the reference. Figures 2 to 5In one embodiment of this application, the battery device 100 includes a device body 101 and a connector assembly 30. The device body 101 includes a battery cell 20 and is configured with a heat exchange channel for exchanging heat with the battery cell 20. The heat exchange channel has a connection port. The connector assembly 30 includes a first connector 31 and a second connector 32 that are detachably connected. One of the first connector 31 and the second connector 32 is connected to the connection port, and the other is configured to connect to an external pipeline. Both the first connector 31 and the second connector 32 are provided with flow channels, and each flow channel is provided with a valve core for opening or closing the corresponding flow channel.

[0081] The device body 101 can be understood as a structure containing a battery cell 20, which is configured with a heat exchange channel for heat exchange with the battery cell 20, and the heat exchange channel has a connection port for connection with external pipelines or other components. In this embodiment, the device body 101 includes a battery box 10 and battery cells 20 disposed within the battery box 10. In some embodiments, the device body 101 may also include an electronic control module.

[0082] The heat exchange channel can be connected to an external pipeline to allow the heat exchange medium to enter, thereby dissipating heat from the battery cells 20 located inside the battery box 10. The heat exchange channel can be composed of independent heat exchange components, or it can be constructed within the wall of the battery box 10 itself; that is, at least a portion of the wall is hollow, thus forming at least a portion of the heat exchange channel. Alternatively, independent heat exchange components can constitute part of the heat exchange channel, and the wall of the battery box 10 can also constitute part of the heat exchange channel.

[0083] The connection port refers to the liquid inlet 15a and liquid outlet 15b of the heat exchange channel. The liquid inlet 15a and liquid outlet 15b can be used to connect to the liquid inlet and liquid outlet pipes in an external pipeline, typically a pipeline within a heat exchange circulation system. That is, through this connection port, the heat exchange medium can flow into or out of the heat exchange channel. The heat exchange medium is typically liquid, such as liquid water or coolant.

[0084] The connector assembly 30 is typically located outside the receiving cavity and is usually connected to the outer wall of the battery box 10. The connector assembly 30 includes a detachably connected first connector 31 and a second connector 32. One of the first connector 31 and the second connector 32 is connected to the connection port, while the other is configured to connect to an external pipeline. That is, the connection port of the heat exchange channel and the pipeline in the heat exchange circulation pipeline are detachably connected via the connector assembly 30. In one example, the second connector 32 is inserted into the first connector 31; that is, the first connector 31 can be understood as a female connector, and the second connector 32 as a male connector. In another example, the first connector 31 is inserted into the second connector 32; that is, the first connector 31 can be understood as a male connector, and the second connector 32 as a female connector. One of the first connector 31 and the second connector 32 is connected to the connection port, while the other is configured to connect to an external pipeline. That is, either the male connector or the female connector can be installed on the device body 101.

[0085] Both the first connector 31 and the second connector 32 are provided with flow channels, and each flow channel is provided with a valve core for opening or closing the corresponding flow channel; both the first connector 31 and the second connector 32 are provided with flow channels, and each flow channel is provided with a valve core, the function of which is to control the state of the flow channel. For ease of description, the flow channel provided in the first connector 31 is defined as the first flow channel 31a, the valve core provided in the first flow channel 31a is defined as the first valve core 33, the flow channel provided in the second connector 32 is defined as the second flow channel 32a, and the valve core provided in the second flow channel 32a is defined as the second valve core 34. The first connector 31 and the second connector 32 are detachably connected, that is, the first connector 31 and the second connector 32 have at least a connected state and a disconnected state.

[0086] In the connection status, please refer to Figure 11 The first connector 31 and the second connector 32 are sealed and plugged into each other, the first valve core 33 and the second valve core 34 abut against each other, the first valve core 33 opens the first flow channel 31a, the second valve core 34 opens the second flow channel 32a, and the first flow channel 31a and the second flow channel 32a are connected; in this state, the heat exchange medium of the external pipeline can flow into the heat exchange channel.

[0087] In the separated state, please refer to Figure 9 The first connector 31 and the second connector 32 are separated. The first valve core 33 closes the first flow channel 31a, and the second valve core 34 closes the second flow channel 32a. The first valve core 33 closing the first flow channel 31a and the second valve core 34 closing the second flow channel 32a means that the first valve core 33 and the second valve core 34 completely close the first flow channel 31a and the second flow channel 32a, so that the heat exchange medium in the heat exchange channel cannot flow through the connector at this point, and the heat exchange medium in the external pipeline cannot flow through the connector at this point.

[0088] In this application's technical solution, valve cores for opening or closing corresponding flow channels are provided in both flow channels, allowing the corresponding flow channels to be closed when the two joints are separated. Applying this solution to the electrical cabinet of a railcar, when maintenance is required on the battery device 100, the valve cores inside the first joint 31 and the second joint 32 close their respective flow channels the instant they separate, directly blocking the path of the heat exchange medium flowing out from the disconnected joints. This reduces the risk of heat exchange medium dripping or splashing onto adjacent battery devices 100 or components (electrical connectors, wiring harnesses, or control units), thereby reducing secondary faults such as short circuits, corrosion, and insulation failure in adjacent battery devices 100 or components. Furthermore, this technical solution reduces the steps and time required for handling heat exchange medium leaks and cleaning contaminants during maintenance, lowering the risk of maintenance personnel coming into contact with chemical media.

[0089] It is understood that, since the first connector 31 and the second connector 32 are detachably connected, in actual transactions, the battery device 100 may include either the device body 101, the first connector 31, or the second connector 32, wherein one of the first connector 31 and the second connector 32 is a male connector and the other is a female connector. In one example, the battery device 100 includes the device body 101 and the second connector 32. The device body 101 includes a battery cell 20 and is configured with a heat exchange channel 111a for heat exchange with the battery cell 20. The heat exchange channel 111a has a connection port. The second connector 32 is located in the device body 101 and communicates with the connection port. The second connector 32 is configured to be detachably connected to the first connector 31, and the first connector 31 is configured to connect to an external pipeline. Both the first connector 31 and the second connector 32 are provided with flow channels, and each flow channel is provided with a valve core for opening or closing the corresponding flow channel. When the first connector 31 and the second connector 32 are separated, the valve core closes the corresponding flow channel.

[0090] In some embodiments, please refer to Figure 4 , Figure 5 and Figure 9 The first connector 31 is provided with a insertion interface 31b, and a sealing ring 35 is provided in the flow channel of the first connector 31. The valve core provided in the first connector 31 is located on the side of the sealing ring 35 away from the insertion interface 31b. The second connector 32 can be inserted into the flow channel of the first connector 31 through the insertion interface 31b, and the flow channels in the first connector 31 and the second connector 32 are interconnected. The sealing ring 35 is set to seal the gap at the insertion and mating position of the first connector 31 and the second connector 32.

[0091] A sealing ring 35 is a component used to fill, seal, or prevent leakage of liquids, gases, or solid substances, and is typically made of rubber, polyurethane, or other elastic materials. In this example, the sealing ring 35 is arranged in a ring shape, and the shape of the sealing ring 35 is typically adapted to the shape of the first connector 31 and the second connector 32, for example, as shown... Figure 4 The first connector 31 and the second connector 32 are circular pipe connector assemblies 30, and the sealing ring 35 is circular in shape. The sealing ring 35 is disposed in the first flow channel 31a, wherein an installation groove 31c can be provided on the inner wall of the first flow channel 31a. The installation groove 31c is usually a recess, and the sealing ring 35 is installed in the installation groove 31c. In this embodiment, part of the sealing ring 35 protrudes out of the installation groove 31c; alternatively, the sealing ring 35 and the inner wall of the first flow channel 31a can be connected by adhesive; alternatively, the sealing ring 35 and the first connector 31 can be integrally formed when the first connector 31 is manufactured.

[0092] The insertion interface 31b is an opening provided in the first connector 31. This opening can be a port of the first flow channel 31a. The second connector 32 can be inserted into the first flow channel 31a through the insertion interface 31b. That is, in this embodiment, the first connector 31 is a female connector and the second connector 32 is a male connector.

[0093] The valve core located within the first connector 31 is situated on the side of the sealing ring 35 furthest from the insertion port 31b. In other words, the first valve core 33 is located on the side of the sealing ring 35 furthest from the insertion port 31b. In other words, compared to the sealing ring 35, the first valve core 33 is located on the inner side of the first flow channel 31a. Thus, when the second connector 32 is inserted from the insertion port 31b into the first flow channel 31a, the sealing ring 35 first seals the gap between the second connector 32 and the inner wall constituting the first flow channel 31a. At this time, the sealing ring 35 surrounds the outer wall of the first connector 31, forming an annular sealing area. That is, the sealing ring 35 is configured to seal the gap at the insertion and mating position of the first connector 31 and the second connector 32. After the second connector 32 passes through the sealing ring 35, as the second connector 32 penetrates to a certain position, the second connector 32 or the second valve core 34 can trigger the first valve core 33, causing the first valve core 33 to switch to the state of opening the first flow channel 31a. The first valve core 33 or other structures located in the first flow channel 31a can trigger the second valve core 34, causing the second valve core 34 to switch to the state of opening the second flow channel 32a. That is, the second connector 32 can be inserted into the flow channel of the first connector 31 from the insertion port 31b, and the flow channels in the first connector 31 and the second connector 32 are interconnected. The process of removing the second connector 32 from the first connector 31 is exactly the reverse. The first valve core 33 and the second valve core 34 first separate the first flow channel 31a and the second flow channel 32a, then release the seal between the insertion and mating positions of the first connector 31 and the second connector 32, and finally the first connector 31 and the second connector 32 are separated.

[0094] In this embodiment, the first connector 31 and the second connector 32 are detachably connected and have a separated state, a pre-connected state, and a connected state. To more clearly illustrate the technical solution of this application, the above three states between the first connector 31 and the second connector 32 will be described below.

[0095] In the separated state, please refer to Figure 9 The first connector 31 and the second connector 32 are separated. The first valve core 33 closes the first flow channel 31a, and the second valve core 34 closes the second flow channel 32a. The first valve core 33 closing the first flow channel 31a and the second valve core 34 closing the second flow channel 32a means that the first valve core 33 and the second valve core 34 completely close the first flow channel 31a and the second flow channel 32a, so that the heat exchange medium in the heat exchange channel cannot flow through the connector at this point, and the heat exchange medium in the external pipeline cannot flow through the connector at this point.

[0096] In the pre-connection state, please refer to Figure 10 That is, the connection between the first connector 31 and the second connector 32 is in a transitional state between the separated state and the connected state, which is a stage of incomplete constraint connection. At this time, the first connector 31 and the second connector 32 are mutually sealed and inserted, the first valve core 33 closes the first flow channel 31a, and the second valve core 34 closes the second flow channel 32a. In other words, when the two connectors switch from the separated state to the connected state, the sealing ring 35 first seals the insertion and mating position of the first connector 31 and the second connector 32, and then makes the first flow channel 31a and the second flow channel 32a connected, reducing the flow of heat exchange medium from the insertion gap between the first connector 31 and the second connector 32 at the moment the first flow channel 31a and the second flow channel 32a are opened; when the two connectors switch from the connected state to the separated state, the first flow channel 31a and the second flow channel 32a are closed respectively, and then the seal between the insertion and mating positions of the first connector 31 and the second connector 32 is released, reducing the flow of heat exchange medium from the insertion gap between the first connector 31 and the second connector 32 at the moment the first flow channel 31a and the second flow channel 32a are closed. In other words, during the switching between the two joints in the separated and connected states, at least one sealing barrier is maintained for at least a certain distance, thereby reducing the problem of heat exchange medium leakage during the switching of the two joints.

[0097] In the connection status, please refer to Figure 11 The first connector 31 and the second connector 32 are sealed and plugged into each other, the first valve core 33 and the second valve core 34 abut against each other, the first valve core 33 opens the first flow channel 31a, the second valve core 34 opens the second flow channel 32a, and the first flow channel 31a and the second flow channel 32a are connected; in this state, the heat exchange medium of the external pipeline can flow into the heat exchange channel.

[0098] In the technical solution of this application, a sealing ring 35 is provided between the valve core and the insertion interface 31b in the first connector 31. When the two connectors switch from the separated state to the connected state, the sealing ring 35 first seals the insertion and mating position of the first connector 31 and the second connector 32, and then connects the first flow channel 31a and the second flow channel 32a. When the two connectors switch from the connected state to the separated state, the first flow channel 31a and the second flow channel 32a are closed respectively, and then the seal between the insertion and mating positions of the first connector 31 and the second connector 32 is released. When this solution is applied to the electrical cabinet of a railcar, when the battery device needs to be maintained, a sealing barrier is maintained for at least a certain distance when the two connectors switch between the separated state and the connected state, further reducing the problem of heat exchange medium leakage during the switching process between the separated state and the connected state.

[0099] In the previous embodiment, the sealing ring 35 was disposed on the first flow channel 31a. Based on the same inventive concept, in this embodiment, the sealing ring 35 can be disposed around the second connector 32; that is, the first valve core 33 has a first abutting surface 33a, and the second valve core 34 has a second abutting surface 34a that cooperates with the first abutting surface 33a; the first connector 31 is provided with a plug-in interface 31b, and the second connector 32 can be inserted into the first connector 31 through the plug-in interface 31b. The first abutting surface 33a and the second abutting surface 34a abut against each other to make the first flow channel 31a and the second flow channel 32a communicate with each other; the outer wall of the second connector 32 is provided with a sealing ring 35, and the sealing ring 35 is set to seal the gap between the insertion and mating positions of the first connector 31 and the second connector 32; the distance between the first abutting surface 33a and the end face where the plug-in interface 31b is located is a first distance, and the distance between the sealing ring 35 and the second abutting surface 34a is a second distance; the first distance is greater than the second distance.

[0100] Where the first abutting surface 33a and the second abutting surface 34a are relatively flat planes, the first distance is as follows: Figure 5 As shown in h1, the second distance is as follows Figure 7 As shown in h2; when the first abutting surface 33a and the second abutting surface 34a are arc-shaped or uneven surfaces, the sealing barrier shall be maintained within at least a certain distance when the two joints are switching between the separated state and the connected state.

[0101] In this embodiment, a sealing ring 35 is disposed around the outer wall of the second connector 32. The sealing ring 35 is configured to seal the gap between the insertion and mating positions of the first connector 31 and the second connector 32. The distance between the first abutment surface 33a and the end face where the insertion interface 31b is located is a first distance, and the distance between the sealing ring 35 and the second abutment surface 34a is a second distance. The first distance is greater than the second distance. Thus, when the two connectors switch from a separated state to a connected state, the sealing ring 35 first seals the insertion and mating positions of the first connector 31 and the second connector 32, and then connects the first flow channel 31a and the second flow channel 32a. When the two connectors switch from a connected state to a separated state, the first flow channel 31a and the second flow channel 32a are closed first, and then the seal between the insertion and mating positions of the first connector 31 and the second connector 32 is released. When this solution is applied to the electrical cabinet of a railcar, when the battery device needs to be repaired, the two connectors maintain a sealing barrier for at least a certain distance when switching between the separated and connected states, further reducing the problem of heat exchange medium leakage during the switching process between the separated and connected states.

[0102] In some embodiments, please refer to Figure 5 The flow channel provided in the first connector 31 is the first flow channel 31a, and the valve core provided in the first flow channel 31a is the first valve core 33; along the extension direction of the first flow channel 31a, there is a gap between the sealing ring 35 and the first valve core 33.

[0103] Along the extension direction of the first flow channel 31a, a gap is provided between the sealing ring 35 and the first valve core 33, the gap being as follows: Figure 5 As shown in d1, it can be understood that the sealing ring 35 and the first valve core 33 are spaced apart along the extension direction of the first flow channel 31a. Of course, this spacing is usually not too large. Thus, when the two connectors switch from the separated state to the connected state, the sealing ring 35 first seals the insertion and mating position of the first connector 31 and the second connector 32, and then after a short distance, the first flow channel 31a and the second flow channel 32a are connected. When the two connectors switch from the connected state to the separated state, the first flow channel 31a and the second flow channel 32a are closed respectively, and then after a short distance, the seal between the insertion and mating positions of the first connector 31 and the second connector 32 is released.

[0104] In this embodiment, without changing the size of the sealing ring 35, the coverage time of the sealing barrier is extended, thereby improving the leakage prevention performance of the two joints during the state switching process.

[0105] In some embodiments, please continue reading Figure 5 Along the extension direction of the first flow channel 31a, there is a gap between the sealing ring 35 and the insertion interface 31b.

[0106] Along the extension direction of the first flow channel 31a, there is a gap between the sealing ring 35 and the insertion interface 31b, that is, there is a certain distance between the end face of the sealing ring 35 and the insertion interface 31b. This gap is as follows: Figure 5 As shown in d2.

[0107] In this embodiment, since there is a gap between the sealing ring 35 and the insertion interface 31b, the second connector 32 will not be subjected to friction or resistance from the sealing ring 35 in the initial stage of insertion, so that the second connector 32 can smoothly enter the flow channel. The sealing ring 35 only begins to play its role after the insertion and alignment are completed, which improves the convenience of operation.

[0108] In some embodiments, please continue reading Figure 5 The distance between the sealing ring 35 and the insertion port 31b is greater than the distance between the sealing ring 35 and the first valve core 33.

[0109] The technical solution of this embodiment ensures that the second connector 32 and the sealing ring 35 do not come into contact prematurely, reducing unnecessary wear during the insertion process. This helps protect the sealing ring 35, extend its service life, and reduce maintenance costs.

[0110] In some embodiments, please continue reading Figure 5 Along the extension direction of the first flow channel 31a, the first flow channel 31a includes a first section 31a1, a second section 31a2, and a third section 31a3 arranged in sequence; the flow area of ​​the first flow channel 31a in the first section 31a1 is greater than the flow area of ​​the first flow channel 31a in the second section 31a2; the flow area of ​​the first flow channel 31a in the third section 31a3 is greater than the flow area of ​​the first flow channel 31a in the second section 31a2; the sealing ring 35 is disposed in the second section 31a2, and the first valve core 33 is confined in the third section 31a3.

[0111] The flow area of ​​the first flow channel 31a in the third section 31a3 is greater than the flow area of ​​the first flow channel 31a in the second section 31a2. That is, the flow area of ​​the third section 31a3 is greater than the flow area of ​​the second section 31a2. This is generally understood to mean that the overall cross-sectional dimension of the first flow channel 31a in the third section 31a3 is not less than the overall dimension of the first flow channel 31a in the second section 31a2. It can be understood that if the cross-sectional shape of the first flow channel 31a is circular, then the cross-sectional view of the third section 31a3... The diameter of the first flow channel 31a is greater than the diameter of the cross-sectional shape of the second segment 31a2; if the cross-sectional shape of the first flow channel 31a is square, then the side length of the cross-sectional shape of the third segment 31a3 is greater than the side length of the cross-sectional shape of the second segment 31a2; if the cross-sectional shape of the first flow channel 31a is rectangular, then the long side of the cross-sectional shape of the third segment 31a3 is not less than the long side of the cross-sectional shape of the second segment 31a2, and the short side of the cross-sectional shape of the third segment 31a3 is not less than the short side of the cross-sectional shape of the second segment 31a2. In this way, a step can be formed at the junction of the first flow channel 31a and the second segment 31a3. This limiting step is used to limit the first valve core 33, thereby simplifying the structure of the first connector 31. The flow area of ​​the first flow channel 31a in the first segment 31a1 is greater than the flow area of ​​the first flow channel 31a in the second segment 31a2, as described above, and will not be repeated here.

[0112] In this example, the sealing ring 35 is located in the second section 31a2, and the first valve core 33 is located in the third section 31a3. Since the size of the first valve core 33 is usually large, it is located in the third section 31a3 with a large flow area. This can balance the effective flow area of ​​the first flow channel 31a and reduce the impact of sudden changes in fluid velocity at local locations on the operation of the valve core.

[0113] In the embodiment, the inner sidewall of the second segment 31a2 is provided with an installation groove 31c, which extends circumferentially along the first flow channel 31a; a sealing ring 35 is provided in the installation groove 31c, and a portion of the sealing ring 35 protrudes out of the installation groove 31c.

[0114] Compared to the sealing ring 35 being integrally formed with the first connector 31, or the sealing ring 35 being glued to the first connector 31, this embodiment places the sealing ring 35 in the mounting groove 31c, which simplifies the process and makes it easier to replace the sealing ring 35.

[0115] In some embodiments, please refer to Figures 9 to 11The first valve core 33 includes a first piston 331, a first elastic element 332, and a push rod 333. The push rod 333 is installed in the first flow channel 31a, the first elastic element 332 is annularly disposed around the push rod 333, and the first piston 331 is movably disposed in the first flow channel 31a in an open position and a closed position. The flow channel of the second connector 32 is the second flow channel 32a, and the valve core disposed in the second flow channel 32a is the second valve core 34. The second valve core 34 includes a second piston 341 and a second elastic element 342. The second piston 341 is movably disposed in the second flow channel 32a in an open position and a closed position. Inside the flow channel 32a; when the second connector 32 is inserted into the first connector 31, the second connector 32 and the first piston 331 abut against each other, the first piston 331 is in the open position, and the first elastic element 332 is in the stored energy state; the push rod 333 and the second piston 341 abut against each other, the second piston 341 is in the open position, and the second elastic element 342 is in the stored energy state; when the second connector 32 and the first connector 31 are separated, the first elastic element 332 releases the stored energy to reset the first piston 331 to the closed position, and the second elastic element 342 releases the stored energy to reset the second piston 341 to the closed position.

[0116] The first valve core 33 includes a first piston 331, a first elastic element 332, and a push rod 333. The first piston 331 can be movable and switched between an open position and a closed position, such as... Figure 9 and Figure 10 As shown, the first piston 331 is in the closed position, as... Figure 11 As shown, the first piston 331 is in the open position. The first piston 331 is installed within the first flow channel 31a and can control the opening and closing of the flow channel according to the fluid flow requirements. The first elastic element 332 is ringed around the push rod 333, providing a restoring force. When the second connector 32 separates from the first connector 31, the elastic element releases its stored energy, pushing the first piston 331 back to the closed position. In the closed position, the first restoring element also provides a certain tension force, keeping the first piston 331 in the closed position. The push rod 333 is installed within the first flow channel 31a and abuts against the second piston 341. The push rod 333 transmits force, thereby enabling the movement of the second piston 341 to be linked with the movement of the first piston 331. In this example, a rod-shaped component is used, which reduces the space occupied by the push rod 333 in the first flow channel 31a, facilitating the miniaturization of the first connector 31.

[0117] The second valve core 34 includes a second piston 341 and a second elastic element 342. The second piston 341 is located within the second flow channel 32a and can also switch between an open position and a closed position. The opening and closing of the second flow channel 32a is controlled by the movement of this piston. Figure 9 and Figure 10 As shown, the second piston 341 is in the closed position, as... Figure 11As shown, the second piston 341 is in the open position. The second elastic element 342, similar to the first elastic element 332, is responsible for providing a restoring force to ensure that the second piston 341 can return to the closed position when the second connector 32 is separated from the first connector 31.

[0118] In this embodiment, when the second connector 32 is inserted into the first connector 31, the second connector 32 and the first piston 331 abut against each other, causing the first piston 331 to be in the open position. At this time, the first elastic element 332 is in an energy storage state, that is, it is compressed and stores a certain amount of energy. At the same time, the push rod 333 and the second piston 341 abut against each other, causing the second piston 341 to be in the open position and the second elastic element 342 to be in an energy storage state; the energy storage state is generally understood to mean that the elastic element is in a compressed state. When the second connector 32 separates from the first connector 31, the first elastic element 332 and the second elastic element 342 will release their stored energy, pushing the first piston 331 and the second piston 341 back to the closed position, respectively. After the first elastic element 332 releases its stored energy, it pushes the first piston 331 back to the closed position, thereby closing the first flow channel 31a and maintaining the first piston 331 in the closed position. After the second elastic element 342 releases its stored energy, it pushes the second piston 341 back to the closed position, thereby closing the second flow channel 32a and maintaining the second piston 341 in the closed position.

[0119] The technical solution of this embodiment reduces the complexity of manual operation and improves the ease of use of the connector assembly 30 by automatically resetting the flow channel.

[0120] In some embodiments, please refer to Figures 9 to 11 The push rod 333 includes a rod body 3331 and a rod cap 3332 disposed on the rod body 3331. The first piston 331 is sealed to the inner wall of the first flow channel 31a. The first piston 331 is provided with a first through hole 331a. In the closed position, the rod cap 3332 and the first piston 331 are sealed to the first through hole 331a to close the first through hole 331a. In the open position, the first piston 331 disengages from the rod cap 3332 to open the first through hole 331a.

[0121] The first piston 331 is sealed to the inner wall of the first flow channel 31a. Typically, a sealing element is provided between the outer wall of the first piston 331 and the inner wall of the first flow channel 31a to achieve this sealed connection. The push rod 333 consists of a rod body 3331 and a rod cap 3332 disposed on the rod body 3331. Generally, along the length of the push rod 333, the cross-sectional area of ​​the rod body 3331 is larger than the cross-sectional area of ​​the rod cap 3332. Thus, the rod cap 3332 can form a sealed connection with the inner hole of the first piston 331, thereby sealing the first flow channel 31a.

[0122] This embodiment, by employing a simple sealing connection of rod 3331, rod cap 3332, and first piston 331, can not only achieve the sealing and opening of the fluid channel, but also has the advantages of simple operation, compact structure, and low maintenance cost. By simplifying the number of parts and working principle, the entire device is not only lower in cost and more reliable, but also more efficient in production and maintenance.

[0123] In some embodiments, please refer to Figure 6 The first valve core 33 also includes a mounting bracket 334 disposed in the first flow channel 31a, and the end of the rod body 3331 away from the rod cap 3332 is mounted on the mounting bracket 334; the first elastic member 332 is arranged in a ring around the rod body 3331 and is limited between the first piston 331 and the mounting bracket 334.

[0124] This technical solution improves the reliability of the first valve core 33 by providing a mounting bracket 334 within the first valve core 33, which provides reliable support for the rod body 3331 and maintains the seal between the first piston 331 and the first through hole 331a. Furthermore, the first piston 331 and the mounting bracket 334 limit the movement of the first elastic element 332. By fitting the first elastic element 332 onto the rod body 3331, dislocation or misalignment of the first elastic element 332 and the first piston 331 can be reduced.

[0125] In some embodiments, the mounting bracket 334 includes a mounting cylinder 3341 and a plurality of support arms 3342 disposed on the outer side wall of the mounting cylinder 3341, the plurality of support arms 3342 being arranged at intervals along the circumference of the mounting cylinder 3341; one end of the rod body 3331 away from the rod cap 3332 is inserted into the mounting cylinder 3341.

[0126] Multiple support arms 3342 are arranged circumferentially along the mounting cylinder 3341, allowing passageways between adjacent support arms 3342 through which the heat exchange medium can pass. The end of the rod 3331 away from the rod cap 3332 is inserted into the mounting cylinder 3341. The rod 3331 and the mounting cylinder 3341 can be connected by interference fit, snap-fit, threaded fit (the mounting cylinder 3341 has an internal thread, and the rod 3331 has a matching external thread), or other connection methods.

[0127] This technical solution enhances the installation stability of the first valve core 33 by setting an installation cylinder 3341 in the installation bracket 334 and configuring multiple support arms 3342 on the outer wall of the installation cylinder 3341. The support arms 3342 are arranged at intervals along the circumference of the installation cylinder 3341, and the support arms 3342 are evenly distributed around the installation cylinder 3341, thereby improving the support force, reducing the influence of external forces on the rod 3331, and further reducing the deformation or displacement of the rod 3331 due to uneven force.

[0128] In some embodiments, please refer to Figure 5 and Figure 6 The first connector 31 includes a first pipe fitting 311 and a first plug fitting 312. The first plug fitting 311 is sealed and inserted into the first pipe fitting 312 to form a first flow channel 31a. The insertion interface 31b is provided in the first plug fitting 311. The first pipe fitting 311 is provided with a limiting step, which is located in the first flow channel 31a. The support arm 3342 abuts against the limiting step and the first plug fitting 312.

[0129] In this embodiment, the first pipe fitting 311 is a pipe connector, such as a pipe joint or a flange. Taking the first pipe fitting 311 as a pipe joint as an example, its inner hole is provided with a sealing structure. The first plug-in 312 is a structure similar to a plug-in socket. For example, the first plug-in 312 is a quick-connect fitting, whose plug end is axially inserted into the inner hole of the first pipe fitting 311 and cooperates with the sealing structure to form a sealed connection. The first plug-in 312 and the first pipe fitting 311 together define the first flow channel 31a, and the insertion interface 31b is located at the distal end of the first plug-in 312. Thus, in this embodiment, the first connector 31 is a split structure, which facilitates the installation of the first valve core 33. In other embodiments, the first pipe fitting 311 and the first plug-in 312 can be glued or welded into a single structure, thereby improving the robustness of the first connector 31.

[0130] The first fitting 311 has a limiting step inside, which is located in the first flow channel 31a, providing a stable installation position for the mounting bracket 334. The support arm 3342 abuts against the limiting step and the first connector 312, further enhancing the stability of the entire connection component. In addition, the overall structure of the first connector 31 is both simple and efficient, which can effectively reduce failures caused by loosening or displacement of the connector, and improve the reliability and service life of the first connector 31.

[0131] In this embodiment, the first pipe fitting 311 and the first plug fitting 312 are separately arranged, which facilitates the installation of the first valve core 33 and subsequent maintenance of the first valve core 33. In addition, the first pipe fitting 311 and the first plug fitting 312 can be directly selected from existing pipe connectors and quick-connect fittings, which are simple in structure and low in cost.

[0132] In some embodiments, please refer to Figure 7 and Figure 8 The second connector 32 includes a second pipe 321 and a second plug 322. The second plug 322 is sealed and inserted into the second pipe 321 to form a second flow channel 32a. The second plug 322 can be inserted into the first plug from the insertion interface 31b. The sealing ring 35 is configured to seal the gap between the first plug and the second plug 322.

[0133] The second pipe fitting 321 is similar to the first pipe fitting 311 and is a pipe connector, such as a pipe joint or a connecting flange. Taking the second pipe fitting 321 as a connecting flange as an example, its inner hole is provided with a sealing structure. The second plug-in 322 is a quick-connect plug, whose plug end is inserted axially into the inner hole of the second pipe fitting 321 and cooperates with the sealing structure to form a sealed connection. The second plug-in 322 can be inserted from the plug interface 31b into the first plug-in, realizing a detachable connection between the first connector 31 and the second connector 32. The second connector 32 is a split structure, which facilitates the installation of the second valve core 34. In other embodiments, the second pipe fitting 321 and the second plug-in 322 can be glued or welded into a single structure, thereby improving the robustness of the second connector 32.

[0134] In this embodiment, the second pipe fitting 321 and the second plug fitting 322 are set separately, which facilitates the installation of the second valve core 34 and subsequent maintenance of the second valve core 34. In addition, the second pipe fitting 321 and the second plug fitting 322 can be directly selected from existing pipe connectors and quick-connect fittings, which are simple in structure and low in cost.

[0135] In some embodiments, please refer to Figure 4 , Figure 7 and Figure 8 The outer wall of the second pipe fitting 321 is provided with a first protrusion 323, and the first protrusion 323 and the device body 101 are connected by fasteners.

[0136] The first protrusion 323 can be referred to as a flange. The first protrusion 323 and the corresponding connecting surface of the device body 101 (the second protrusion 155 described later) are rigidly fixed by fasteners (such as bolts, screws or clamps). This connection structure enables the axial positioning and torsional stability between the second pipe 321 and the device body 101. The first protrusion 323 can serve as a reinforcing rib structure to improve local rigidity.

[0137] In this embodiment, a first protrusion 323 is provided on the outer side wall of the second pipe 321, and the first protrusion 323 is connected to the device body 101 by fasteners, thereby enhancing the stability and firmness of the connection.

[0138] In some embodiments, please refer to Figure 4 And further refer to 6 and Figure 7 The first connector 31 is provided with a bayonet 31d, and the outer side wall of the second connector 32 is provided with a slot 32b; the connector assembly 30 also includes a snap-fit ​​member 36, which can snap-fit ​​with both the bayonet 31d and the slot 32b at the same time.

[0139] The first connector 31 is provided with a bayonet 31d, which is typically an opening connecting to the first flow channel 31a. The bayonet 31d extends circumferentially along the first connector 31 and is typically a trapezoidal hole. Along the radial direction of the first connector 31, the opening area of ​​the bayonet 31d increases from the inside to the outside. A slot 32b is used to mate with the bayonet 31d of the first connector 31. The slot 32b is typically designed with a shape and size matching the bayonet 31d, allowing the two to be aligned. This facilitates the insertion of the snap-fit ​​component 36 from the bayonet 31d into the slot 32b. The snap-fit ​​component 36 strengthens the connection, ensuring a secure connection between the first connector 31 and the second connector 32 during long-term connection, preventing separation and improving the reliability of the connection. To reduce alignment difficulty, the slot 32b is typically an annular groove. This eliminates the need for radial alignment between the first connector 31 and the second connector 32, reducing the difficulty of docking. The snap-fit ​​component 36 can be a snap ring, snap block, or snap-fit ​​strip, etc., without specific limitations.

[0140] In this embodiment, through the cooperation of the bayonet 31d, the slot 32b and the snap fastener 36, the operator only needs to align the snap fastener 36 with the bayonet 31d and the slot 32b to complete the reinforced connection of the connector without performing complicated operation steps, and also improves the stable connection of the first connector 31 and the second connector 32.

[0141] In some embodiments, please refer to Figure 6 And further refer to 4 and Figure 7 The first connector 31 is provided with two opposing slots 31d, both of which extend circumferentially along the first connector 31; the snap-fit ​​member 36 includes two opposing snap-fit ​​arms 362 and an operating part 361 connected to one end of the two snap-fit ​​arms 362; the operating part 361 is located on the outside of the first connector 31; each snap-fit ​​arm 362 can be snapped into the slot 32b from one slot 31d.

[0142] The first connector 31 has two opposing latches 31d, which extend circumferentially along the first connector 31. The two latches 31d are spaced apart circumferentially to provide structural strength at the latches 31d. Two locking arms 362 are connected to both ends of the operating part 361 and are positioned opposite each other. The main function of the locking arms 362 is to engage with the latches 31d on the first connector 31 and the slots 32b on the second connector 32, thereby improving the secure connection between the first connector 31 and the second connector 32. The operating part 361 is located on the outside of the first connector 31. Sufficient operating space is typically provided between the operating part 361 and the outer wall of the first connector 31 to allow the user to pinch or pull. Through the operating part 361, the user can easily engage or disengage the locking member 36 at the latches 31d and slots 32b.

[0143] The working process of the snap-fit ​​component 36 involves pressing or pushing the snap-fit ​​arm 362 against the operating part 361, causing the snap-fit ​​arm 362 to align and engage with the bayonet 31d, and then with the slot 32b. This snap-fit ​​method is both simple and efficient. The operator only needs to easily push or pull the operating part 361 for the snap-fit ​​arm 362 to enter the bayonet 31d and lock the connection. When disassembly is required, the locking connection between the snap-fit ​​arm 362 and the bayonet 31d can be easily released by reversing the operation, thereby separating the connector assembly 30. This operation is simple and quick, facilitating maintenance or replacement.

[0144] The reinforced fixing structure of the first connector 31 and the second connector 32 in this embodiment has the advantages of simple structure, stable connection, simple and quick operation, and convenient maintenance or replacement.

[0145] In some embodiments, please refer to Figure 6 And further refer to 4 and Figure 7 Each of the two snap-fit ​​arms 362 has a holding part 363 at the end away from the operating part 361; when the two snap-fit ​​arms 362 are snapped into the two snap-fit ​​slots 31d in a one-to-one correspondence, the holding part 363 is held in place on the outer side wall of the first connector 31.

[0146] When the retaining part 363 engages with the outer wall of the first connector 31, it effectively secures the snap-fit ​​arm 362 within the bayonet 31d. The shape and size of the retaining part 363 allow it to lock during the snap-fit ​​process, ensuring that the engagement between the snap-fit ​​arm 362 and the bayonet 31d is not easily broken by external forces. During the installation of the snap-fit ​​component 36, the operating part 361 is pushed or pulled, causing the snap-fit ​​arm 362 to gradually enter the bayonet 31d. As the snap-fit ​​arm 362 engages with the bayonet 31d, the retaining part 363 also gradually and tightly engages with the outer wall of the first connector 31, achieving a secure lock on the snap-fit ​​arm 362.

[0147] This embodiment enhances the stability of the engagement between the snap-fit ​​member 36 and the first connector 31 by providing a retaining part 363 at the end of the snap-fit ​​arm 362 away from the operating part 361, and further improves the connection reliability of the first connector 31 and the second connector 32 in the connected state.

[0148] In some embodiments, please refer to Figure 2 The main body 101 of the device includes a battery box 10, which has a receiving cavity 10a in which a single battery cell 20 is housed; the wall of the battery box 10 has a heat exchange channel, and a second connector 32 is installed in the battery box 10.

[0149] The battery box 10 provides a space for housing the battery cells 20, thus supporting and protecting them. The battery box 10 can have various structures. In some embodiments, the battery box 10 may include a first part and a second part, which overlap each other, together defining a space for housing the battery cells 20. The second part may be a hollow structure with one open end, and the first part may be a plate-like structure, covering the open side of the second part so that the first and second parts together define the space. Alternatively, both the first and second parts may be hollow structures with one open end, with the open side of the first part covering the open side of the second part. Of course, the battery box 10 formed by the first and second parts can have various shapes, such as a cylinder or a cuboid. Taking a cuboid battery box 10 as an example, heat exchange channels can be provided on any one of its six walls, or on any multiple or all of its walls. No specific limitations are made here.

[0150] In this embodiment, by embedding the heat exchange channel in the wall of the battery box 10, the volume occupied by the thermal management component in the battery device 100 can be reduced, thereby improving the compactness and usability of the battery device 100.

[0151] Furthermore, the second connector 32 is installed in the battery box 10, and when the interface end of the second connector 32 that is plugged into the first connector 31 is facing downwards (e.g. Figures 9 to 11 As shown, when the first connector 31 and the second connector 32 are switched from the connected state to the disassembled state, since there is a certain gap between the first valve core 33 and the plug-in, the space formed by this gap can contain the heat exchange medium and further reduce the leakage of the heat exchange medium.

[0152] The following will take the box body 11 as the first part and the box lid 13 as the second part as an example for further introduction.

[0153] In some embodiments, please refer to Figure 2 And further reading Figures 12 to 14In one embodiment of this application, the battery device 100 includes a battery box 10 and a battery cell 20. The battery box 10 includes a box body 11 and a box cover 13. The box body 11 includes a bottom plate 111, two side plates 113 and two end plates 115. The bottom plate 111 has a heat exchange channel 111a inside. The two side plates 113 are respectively disposed on both sides of the bottom plate 111 in a first direction, and at least one of them is integral with the bottom plate 111. The two side plates 113 are disposed on both sides of the bottom plate 111 in a second direction, and the second direction intersects the first direction. The bottom plate 111, the two side plates 113 and the two end plates 115 are configured to form a receiving groove 11a. The box cover 13 covers the opening of the receiving groove 11a and is configured with the receiving groove 11a to form a receiving cavity 10a. The battery cell 20 is disposed in the receiving cavity 10a.

[0154] The battery box 10 provides space for the battery cells 20 through the accommodating cavity 10a formed by the box body 11 and the box cover 13, thus providing support and protection for the battery cells 20. The bottom plate 111 in the box body 11 is used to install and support the battery cells 20. Therefore, when the battery assembly 100 is in normal installation and use, the battery cells 20 can be installed on the upper surface of the bottom plate 111. A first direction can be the width direction of the battery assembly 100, with the two side plates 113 located on both sides of the bottom plate 111 in the width direction and extending upwards. A second direction can be the length direction of the battery assembly 100, with the two end plates 115 located on both sides of the bottom plate 111 in the length direction and extending upwards. The bottom plate 111, the two side plates 113, and the two end plates 115 together form an upward-facing accommodating groove 11a. The cover 13 can be fitted onto the upper end of the housing 11 to close the opening of the receiving groove 11a. The cover 13 can be a plate structure. In this case, the battery cell 20 can be completely housed within the housing 11. Alternatively, the cover 13 can be a hollow structure with one open end. In this case, the battery cell 20 can be partially housed within the housing 11, and the remaining portion within the cover 13. Furthermore, the connection between the housing 11 and the cover 13 can be a detachable connection, such as a threaded connection using screws or bolts, a snap-fit ​​connection, or a magnetic connection. Alternatively, the housing 11 and the cover 13 can be a non-detachable connection, such as an adhesive connection or a welded connection.

[0155] The heat exchange channel 111a is disposed inside the bottom plate 111 of the tank. That is, in the cross-section perpendicular to the extension direction of the heat exchange channel 111a, the cross-section of the heat exchange channel 111a is a closed ring. The cross-section of the heat exchange channel 111a can be any shape, such as circular, rectangular, racetrack-shaped, or elliptical. Furthermore, the heat exchange channel 111a can include multiple sub-channels 111a1 arranged side-by-side in one direction, as described below. Of course, the heat exchange channel 111a can also meander back and forth in the first direction; this application does not limit the shape of the channel path of the heat exchange channel 111a.

[0156] The bottom plate 111 and at least one of the two side plates 113 are integral structures, meaning that the bottom plate 111 and the side plates 113 can be manufactured using an integral molding process, so that they can be formed as a whole during manufacturing. This integral molding process can be integral extrusion molding or integral injection molding, etc. Simultaneously, the heat exchange channel 111a disposed within the bottom plate 111 can also be directly formed during integral molding. Specifically, the bottom plate 111 and one side plate 113 can be integral structures, or the bottom plate 111 and both side plates 113 can be integral structures. Furthermore, the bottom plate 111 and the side plates 113 being integral structures includes the case where the bottom plate 111 itself is an integral structure. Of course, this also includes the case where the bottom plate 111 is divided into two parts, a first sub-plate 1111 and a second sub-plate 1113, as described below. Furthermore, the end plate 115 may be connected only to the bottom plate 111, only to the side plate 113, or only to the collectors 15 or sealing members 17 at both ends of the bottom plate 111 in the second direction, as further described below. Alternatively, it may be connected to at least two of the bottom plate 111, the collectors 15 of the side plate 113, and the sealing members 17. Welding can be used to connect the end plates 115 to improve the stability of the connection and the sealing effect of the accommodating cavity 10a. Of course, adhesive bonding or other connection methods can also be used; this application does not limit the connection method of the end plates 115.

[0157] The battery device 100 in this application integrates a heat exchange channel 111a inside the bottom plate 111 of the housing 11 of the battery box 10. This eliminates the need for additional heat exchange plates for the individual battery cells 20 during operation, simplifying the number of components and eliminating the need for welding the heat exchange plates. Furthermore, the bottom plate 111 and at least one of the two side plates 113 in the housing 11 are integrally formed. This allows for the simultaneous molding of the bottom plate 111 with the heat exchange channel 111a and at least one side plate 113, further eliminating the need for welding between the bottom plate 111 and the side plates 113. Therefore, by integrally molding the bottom plate 111 with the heat exchange channel 111a and the two side plates 113 in this solution, the amount of welding required for the battery device 100 can be reduced, minimizing structural deformation or cracks caused by welding stress due to improper welding. In addition, the heat exchange channel 111a is formed in the bottom plate 111 by means of one-piece molding, which can also make the heat exchange channel 111a have a better sealing effect.

[0158] Please refer to Figure 13 In one embodiment of this application, the bottom plate 111 includes a first sub-plate 1111 and a second sub-plate 1113, which are arranged along a first direction; the first sub-plate 1111 and one of the two side plates 113 are integrally formed, and the second sub-plate 1113 and one of the two side plates 113 are integrally formed.

[0159] The first sub-plate 1111 and the second sub-plate 1113, i.e., the bottom plate 111, are split into two parts between the two side plates 113. In this case, heat exchange channels 111a can be distributed on the first sub-plate 1111 and the second sub-plate 1113 to increase the coverage area of ​​the heat exchange channels 111a and improve the heat exchange effect on the battery cells 20 located inside the battery box 10. Of course, the heat exchange channels 111a can also be provided only on one of the first sub-plate 1111 and the second sub-plate 1113.

[0160] In this embodiment, the bottom plate 111 is split into a first sub-plate 1111 and a second sub-plate 1113, such that the first sub-plate 1111 and one side plate 113 can form a component, and the second sub-plate 1113 and another side plate 113 can form a component. At this point, the two components are relatively small in size, allowing for the use of smaller and simpler molds to shape them, thus improving the ease of mold manufacturing.

[0161] Please refer to the reference. Figures 12 to 14In one embodiment of this application, the heat exchange channel 111a includes a plurality of interconnected sub-channels 111a1, the plurality of sub-channels 111a1 are arranged along a first direction and all extend along a second direction; the plurality of sub-channels 111a1 are respectively distributed on a first sub-plate 1111 and a second sub-plate 1113, and the connection between the first sub-plate 1111 and the second sub-plate 1113 is located between two adjacent sub-channels 111a1.

[0162] Multiple sub-channels 111a1 can be connected in series, in parallel, or in a mixed configuration of series and parallel connections. The connection between the first sub-board 1111 and the second sub-board 1113 is located between two adjacent sub-channels 111a1. That is, the sub-channel 111a1 closest to the second sub-board 1113 in the first sub-board 1111 and the sub-channel 111a1 closest to the first sub-board 1111 in the second sub-board 1113 are independently and completely connected.

[0163] In this embodiment, the connection between the first sub-plate 1111 and the second sub-plate 1113 is located between two adjacent sub-channels 111a1, making the two adjacent sub-channels 111a1 independently and completely configured. This reduces the impact of separating the first sub-plate 1111 and the second sub-plate 1113 on the sealing performance of the sub-channel 111a1, thereby reducing the possibility of leakage in the heat exchange channel 111a at the connection between the first sub-plate 1111 and the second sub-plate 1113.

[0164] Of course, it should be noted that this application is not limited to this. In other embodiments, a sub-channel 111a1 may also be provided at the junction of the first sub-board 1111 and the second sub-board 1113. In this case, the sub-channel 111a1 can be formed by the first sub-board 1111 and the second sub-board 1113.

[0165] In one embodiment of this application, the first sub-plate 1111 and the second sub-plate 1113 are welded together.

[0166] In this embodiment, the first sub-plate 1111 and the second sub-plate 1113 are welded together as a whole. This can improve the stability of the connection between the two, improve the sealing of the heat exchange channel 111a, and eliminate the need to set a connection structure on the first sub-plate 1111 and the second sub-plate 1113, thereby simplifying their respective structural settings.

[0167] Please refer to the reference. Figures 12 to 14In one embodiment of this application, the bottom plate 111 of the box is provided with a cavity and is open at both ends in the second direction; a plurality of first partition plates 1115 are provided in the cavity and arranged side by side along the first direction to divide the cavity into a plurality of sub-channels 111a1, and the plurality of sub-channels 111a1 are connected to form a heat exchange channel 111a.

[0168] The bottom plate 111 has a cavity and is open at both ends, thus forming a hollow structure with open ends in the second direction. When the bottom plate 111 is divided into a first sub-plate 1111 and a second sub-plate 1113 as described above, both the first sub-plate 1111 and the second sub-plate 1113 can be hollow structures with open ends in the second direction, and each of the first partition plates 1115 can be distributed within the first sub-plate 1111 and the second sub-plate 1113. Furthermore, when the junction of the first sub-plate 1111 and the second sub-plate 1113 is located between two adjacent sub-channels 111a1 as described above, the first partition plate 1115 of the first sub-plate 1111 that is closest to the second sub-plate 1113 is fitted together with the first partition plate 1115 of the second sub-plate 1113 that is closest to the first sub-plate 1111, and the junction of the first sub-plate 1111 and the second sub-plate 1113 is located between the two first partition plates 1115.

[0169] In this embodiment, the bottom plate 111 is configured as a hollow structure with openings at both ends in the second direction. At the same time, the heat exchange channel 111a is configured as multiple sub-channels 111a1 arranged side by side along the first direction by the internal first partition plate 1115. This makes the structure of the bottom plate 111 relatively simple and facilitates the formation of the heat exchange channel 111a inside the bottom plate 111 by an integral molding process.

[0170] Please refer to the reference. Figure 2 as well as Figures 12 to 15 In one embodiment of this application, the bottom plate 111 is defined to have a first end 11c and a second end 11d opposite each other in the second direction. The battery box 10 also includes a current collector 15, which covers the opening of the first end 11c. The current collector 15 is provided with an inlet port 15a and an outlet port 15b, both of which are connected to the heat exchange channel 111a.

[0171] The manifold 15 can be used to seal the opening at the first end 11c of the bottom plate 111, thereby sealing each sub-channel 111a1 at the first end 11c. At this time, each of the first partition plates 1115 within the bottom plate 111 can be partially spaced from the manifold 15, allowing two adjacent sub-channels 111a1 to communicate at that end. Other portions can contact the manifold 15, isolating two adjacent sub-channels 111a1 at that end. Additionally, the manifold 15 can also serve as a transitional connection between the heat exchange channel 111a within the bottom plate 111 and the external circulating heat exchange pipeline. That is, the liquid inlet 15a and liquid outlet 15b on the manifold 15 can be connected to the liquid inlet pipe and liquid outlet pipe in the external circulating heat exchange pipeline, respectively. The liquid inlet 15a can be directly connected to the liquid inlet pipe in the external circulating heat exchange pipeline, or the two can be detachably connected via a pipe joint 30. Similarly, the liquid outlet port 15b can be directly connected to the liquid outlet pipe in the external circulation heat exchange pipeline, or the two can be detachably connected via pipe joint 30. Additionally, the liquid inlet port 15a can be connected to two adjacent sub-channels 111a1 in the heat exchange channel 111a, as described below, or it can be connected to only one sub-channel 111a1. Likewise, the liquid outlet port 15b can be connected to two adjacent sub-channels 111a1 in the heat exchange channel 111a, as described below, or it can be connected to only one sub-channel 111a1. Furthermore, the liquid inlet port 15a and the sub-channel 111a1 in the heat exchange channel 111a can be indirectly connected via the first transition channel 15d, as described below, or they can be directly connected. Similarly, the liquid outlet port 15b and the sub-channel 111a1 in the heat exchange channel 111a can be indirectly connected via the second transition channel 15e, as described below, or they can be directly connected. In addition, the connection between the manifold 15 and the bottom plate 111 can be welded to improve the stability of the connection and the sealing effect of the heat exchange channel 111a. Of course, adhesive bonding or other connection methods can also be used; this application does not limit the connection method of the manifold 15.

[0172] In this embodiment, a manifold 15 can seal multiple sub-channels 111a1 at the first end 11c, and can also provide transitional connection between the multiple sub-channels 111a1 and the external circulating heat exchange pipeline, thereby enabling one component to perform multiple functions, so as to further simplify the number of components in the battery device 100.

[0173] Please refer to the reference. Figure 13 and Figure 14In one embodiment of this application, the current collector 15 is provided with a mounting hole 15c. The mounting hole 15c can be used to externally mount the battery device 100. For example, when mounting the mounting hole 15c onto the vehicle 1000 described above, a threaded connector (e.g., a bolt or screw) can be passed through the mounting hole 15c to achieve a threaded connection with a component on the vehicle 1000. The number of mounting holes 15c can be one, or two or more.

[0174] In this embodiment, a mounting hole 15c is integrated on the manifold 15, so that the manifold 15, in addition to sealing the first end 11c of the multiple sub-channels 111a1 in the heat exchange channel 111a as described above and providing transitional connection between the multiple sub-channels 111a1 and the external circulating heat exchange pipeline, can further serve as an external mounting connection for the battery device 100. This further eliminates the need for a mounting bracket, thereby further reducing the welding work required for the battery device 100.

[0175] In one embodiment of this application, both the liquid inlet 15a and the liquid outlet 15b are located on the side of the collector facing the opening of the receiving tank 11a. In this embodiment, the liquid inlet 15a and the liquid outlet 15b are arranged facing upwards, so that when the battery device 100 is installed on the vehicle 1000, the liquid inlet 15a and the liquid outlet 15b can be well exposed, thereby facilitating the connection between the liquid inlet 15a and the liquid outlet 15b and the external circulating heat exchange pipeline.

[0176] Please refer to Figure 12 In one embodiment of this application, on a projection plane perpendicular to a third direction, both the liquid inlet 15a and the liquid outlet 15b are located outside the projection of the accommodating cavity 10a.

[0177] The liquid inlet 15a and the liquid outlet 15b are located outside the projection of the accommodating cavity 10a, that is, the liquid inlet 15a and the liquid outlet 15b are located outside the battery box 10.

[0178] In this embodiment, the liquid inlet 15a and the liquid outlet 15b are located on the outside of the battery box 10, so that the connector assembly 30 connecting the liquid inlet 15a and the liquid outlet 15b to the liquid inlet pipe and the liquid outlet pipe in the external circulation pipeline can be located on the outside of the battery box 10, thereby not occupying space on the inside of the battery box 10, while also facilitating its disassembly, assembly and maintenance.

[0179] Please refer to the reference. Figure 14 and Figure 15In one embodiment of this application, the bottom plate 111 is provided with an installation notch 111e at the first end 11c, the opening of the first end 11c is connected to the installation notch 111e, and the current collector 15 is provided at the installation notch 111e.

[0180] The mounting notch 111e can be formed by three walls, two of which are arranged opposite each other in a first direction, and the third wall is connected to the two opposite walls and forms an opening at the first end 11c. Alternatively, when the bottom plate 111 includes a first sub-plate 1111 and a second sub-plate 1113 as described above, the mounting notch 111e can be distributed on both the first sub-plate 1111 and the second sub-plate 1113.

[0181] In this embodiment, by adapting and installing the current collector 15 through the mounting notch 111e, the compactness of the distribution between the current collector 15 and the bottom plate 111 can be improved, so as to reduce the overall volume of the battery box 10 and improve the convenience of its subsequent installation and arrangement in a limited space.

[0182] Please refer to the reference. Figures 12 to 15 In one embodiment of this application, the current collector 15 is inserted into the bottom plate 111 of the box.

[0183] A plug-in fit means that one component is inserted into the recessed structure of another component through a protruding structure. For example, part of the manifold 15 is inserted into the first annular groove 111f formed on the inner side of the first end 11c of the bottom plate 111; of course, a groove surrounding the opening of the first end 11c can also be provided on the end face of the first end 11c of the bottom plate 111, or a groove surrounding the opening of the first end 11c can be provided on the outer side of the first end 11c of the bottom plate 111, for the plug-in fit of the manifold 15. Alternatively, the manifold 15 can be provided with a groove, and a rib can be provided on the end face of the first end 11c of the bottom plate 111, with the rib inserted into the groove.

[0184] In this embodiment, the current collector 15 and the bottom plate 111 are configured to be plugged into each other, which can increase the limiting constraint force between them, thereby improving the stability of the connection between the current collector 15 and the bottom plate 111. This will improve the stability of the subsequent installation of the battery device 100 when the current collector 15 is integrated with the mounting hole 15c described above.

[0185] Please refer to the reference. Figures 12 to 15 In one embodiment of this application, the bottom plate 111 is provided with a first annular groove 111f on the inner side of the first end 11c. The groove opening of the first annular groove 111f is configured as the opening of the first end 11c, and part of the current collector 15 is inserted into the first annular groove 111f.

[0186] In this embodiment, by providing a first annular groove 111f on the inner side of the first end 11c of the bottom plate 111 for the insertion and engagement of a portion of the current collector 15, it is unnecessary to provide a recessed structure on the current collector 15 for insertion and engagement. This improves the structural strength of the current collector 15, further enhancing the stability of subsequent installation of the battery device 100 when the current collector 15 integrates the mounting hole 15c described above. Simultaneously, it simplifies the structure of the bottom plate 111, thereby improving its manufacturing convenience.

[0187] Please refer to the reference. Figure 12 and Figure 15 In one embodiment of this application, the battery box 10 further includes a sealing member 17, which covers the opening at the second end 11d.

[0188] The sealing element 17 can be used to cover the opening at the second end 11d of the bottom plate 111, so as to seal each sub-channel 111a1 at the second end 11d. At this time, each of the first partition plates 1115 inside the bottom plate 111 can be partially spaced from the sealing element 17 to achieve communication between two adjacent sub-channels 111a1 at that end. Other portions can contact the sealing element 17 to achieve isolation between two adjacent sub-channels 111a1 at that end. Furthermore, the connection between the sealing element 17 and the bottom plate 111 can be welded to improve the stability of the connection and the sealing effect of the heat exchange channel 111a. Of course, adhesive bonding or other connection methods can also be used; this application does not limit the connection method of the sealing element 17.

[0189] In this embodiment, a sealing member 17 can seal multiple sub-channels 111a1 at the second end 11d. By sealing the heat exchange channel 111a at the second end 11d, the number of components in the battery device 100 can be simplified.

[0190] Please refer to the reference. Figures 12 to 14 In one embodiment of this application, the sealing member 17 is inserted into the bottom plate 111 of the box.

[0191] The sealing member 17 is inserted into the bottom plate 111, as described below. Specifically, a portion of the sealing member 17 can be inserted into the second annular groove 111g formed inside the second end 11d of the bottom plate 111. Alternatively, a groove surrounding the opening of the second end 11d can be provided on the end face of the bottom plate 111, or a groove surrounding the opening of the second end 11d can be provided on the outside of the bottom plate 111, for the insertion and engagement of the sealing member 17. Alternatively, the sealing member 17 can have a groove, and a rib can be provided on the end face of the second end 11d of the bottom plate 111, with the rib inserted into the groove.

[0192] In this embodiment, the sealing member 17 and the bottom plate 111 are configured to be plugged into each other, which increases the limiting constraint force between them, thereby improving the stability of the connection between the sealing member 17 and the bottom plate 111. At the same time, it can also increase the contact area between them, thereby improving the sealing effect of the sealing member 17 on the second end 11d of the bottom plate 111.

[0193] In one embodiment of this application, the bottom plate 111 and at least one of the two side plates 113 are integrally extruded. In this embodiment, integrally extruding the bottom plate 111 and at least one side plate 113 facilitates the formation of a heat exchange channel 111a inside the bottom plate 111.

[0194] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The device body includes a single battery cell, and the device body is equipped with a heat exchange channel for heat exchange with the single battery cell, the heat exchange channel having a connection port; and A connector assembly includes a detachably connected first connector and a second connector, one of which is connected to the connector port, and the other of which is configured to connect to an external conduit. Both the first connector and the second connector are provided with flow channels, and each flow channel is provided with a valve core for opening or closing the corresponding flow channel; When the first connector and the second connector are separated, the valve core closes the corresponding flow channels respectively.

2. A battery device, characterized in that, include: The device body includes a battery cell, and the device body is equipped with a heat exchange channel for exchanging heat with the battery cell, and the heat exchange channel has a connection port; as well as The second connector is located on the main body of the device and communicates with the connection port; The second connector is configured to be detachably connected to the first connector, and the first connector is configured to connect to an external pipeline; both the first connector and the second connector are provided with flow channels, and each flow channel is provided with a valve core for opening or closing the corresponding flow channel; When the first connector and the second connector are separated, the valve core closes the corresponding flow channels respectively.

3. The battery device as described in claim 1 or 2, characterized in that, The first connector is provided with a plug-in interface, and the second connector can be inserted into the flow channel of the first connector through the plug-in interface, so that the flow channels of the first connector and the flow channels of the second connector are connected to each other. The first connector has a sealing ring in its flow channel, and the valve core located in the first connector is on the side of the sealing ring away from the insertion interface. The sealing ring is configured to seal the gap between the insertion and mating positions of the first connector and the second connector.

4. The battery device as claimed in claim 3, characterized in that, The flow channel within the first connector is designated as the first flow channel, and the valve core within the first flow channel is designated as the first valve core. Along the extension direction of the first flow channel, there is a gap between the sealing ring and the first valve core.

5. The battery device as claimed in claim 4, characterized in that, Along the extension direction of the first flow channel, there is a gap between the sealing ring and the insertion interface.

6. The battery device as claimed in claim 5, characterized in that, The distance between the sealing ring and the insertion interface is greater than the distance between the sealing ring and the first valve core.

7. The battery device as claimed in claim 4, characterized in that, Along the extension direction of the first flow channel, the first flow channel includes a first section, a second section, and a third section arranged in sequence; The flow area of ​​the first flow channel in the first section is greater than the flow area of ​​the first flow channel in the second section; the flow area of ​​the first flow channel in the third section is greater than the flow area of ​​the first flow channel in the second section. The sealing ring is located in the second section, and the first valve core is located in the third section.

8. The battery device as claimed in claim 7, characterized in that, The inner wall of the second section is provided with a mounting groove, which extends circumferentially along the first flow channel; the sealing ring is provided in the mounting groove, and part of the sealing ring protrudes out of the mounting groove.

9. The battery device as claimed in claim 1 or 2, characterized in that, The flow channel in the first connector is designated as the first flow channel, and the valve core in the first flow channel is designated as the first valve core; the flow channel in the second connector is designated as the second flow channel, and the valve core in the second flow channel is designated as the second valve core. The first valve core has a first abutting surface, and the second valve core has a second abutting surface that mates with the first abutting surface; The first connector is provided with a plug-in interface, and the second connector can be inserted into the first connector through the plug-in interface. The first abutting surface and the second abutting surface abut against each other to make the first flow channel and the second flow channel communicate with each other. The outer wall of the second connector is provided with a sealing ring, which is configured to seal the gap between the insertion and mating positions of the first connector and the second connector; The distance between the first abutting surface and the end face where the insertion interface is located is the first distance, and the distance between the sealing ring and the second abutting surface is the second distance; the first distance is greater than the second distance.

10. The battery device as claimed in claim 9, characterized in that, The first valve core includes a first piston, a first elastic element, and a push rod; the push rod is installed in the first flow channel, the first elastic element is annularly disposed on the push rod, and the first piston is movably disposed in the first flow channel in an open position and a closed position. The flow channel provided in the second connector is the second flow channel, and the valve core provided in the second flow channel is the second valve core. The second valve core includes a second piston and a second elastic element. The second piston is movably and switchably provided in the second flow channel in an open position and a closed position. When the second connector is inserted into the first connector, the second connector abuts against the first piston, the first piston is in the open position, and the first elastic element is in the energy storage state; the push rod abuts against the second piston, the second piston is in the open position, and the second elastic element is in the energy storage state; When the second connector and the first connector are separated, the first elastic element releases its stored energy to reset the first piston to the closed position, and the second elastic element releases its stored energy to reset the second piston to the closed position.

11. The battery device as claimed in claim 10, characterized in that, The push rod includes a rod body and a rod cap disposed on the rod body; the first piston is sealed to the inner wall of the first flow channel; and the first piston is provided with a first through hole. In the closed position, the rod cap and the first piston are sealed together within the first through hole to close the first through hole; In the open position, the first piston disengages from the rod cap to open the first through hole.

12. The battery device as claimed in claim 11, characterized in that, The first valve core further includes a mounting bracket disposed within the first flow channel, and the end of the rod away from the rod cap is mounted on the mounting bracket; the first elastic element is annularly disposed on the rod and confined between the first piston and the mounting bracket.

13. The battery device as claimed in claim 12, characterized in that, The mounting bracket includes a mounting cylinder and a plurality of support arms disposed on the outer wall of the mounting cylinder, the plurality of support arms being arranged at intervals along the circumference of the mounting cylinder; the end of the rod away from the rod cap is inserted into the mounting cylinder.

14. The battery device as claimed in claim 13, characterized in that, The first connector includes a first pipe and a first plug, the first plug being sealed and inserted into the first pipe to form the first flow channel, and the plug interface being located on the first plug. The first pipe fitting is provided with a limiting step, which is located in the first flow channel, and the support arm abuts between the limiting step and the first plug-in component.

15. The battery device as claimed in claim 14, characterized in that, The second connector includes a second pipe fitting and a second plug fitting, the second plug fitting being sealed and inserted into the second pipe fitting to form the second flow channel; The second connector can be inserted into the first connector from the connector interface, and the sealing ring is configured to seal the gap between the first connector and the second connector.

16. The battery device as claimed in claim 15, characterized in that, The outer wall of the second pipe fitting is provided with a first protrusion, and the first protrusion and the main body of the device are connected by fasteners.

17. The battery device as claimed in claim 1 or 2, characterized in that, The first connector is provided with a bayonet, and the outer side wall of the second connector is provided with a slot; the connector assembly also includes a snap-fit ​​component, which can snap into both the bayonet and the slot simultaneously.

18. The battery device as claimed in claim 17, characterized in that, The first connector is provided with two opposing bayonets, both of which extend along the circumference of the first connector. The snap-fit ​​component includes two snap-fit ​​arms arranged opposite each other and an operating part connected to one end of the two snap-fit ​​arms; the operating part is located on the outside of the first connector; Each of the said latching arms can be snapped into the said latching slot from one of the said latching openings.

19. The battery device as claimed in claim 18, characterized in that, Each of the two snap-fit ​​arms has a holding part at one end away from the operating part; the two snap-fit ​​arms are snapped into the two bayonets in a one-to-one correspondence, and the holding part is fastened to the outer wall of the first connector.

20. The battery device as claimed in claim 1 or 2, characterized in that, The main body of the device includes a battery box, which has a receiving cavity in which the individual battery cells are housed; the battery box wall has the heat exchange channel, and the second connector is installed in the battery box.

21. The battery device as claimed in claim 20, characterized in that, The battery box includes a box body and a box cover. The box body includes a box bottom plate, two box side plates and two box end plates. The box bottom plate is provided with a heat exchange channel inside. The two box side plates are respectively located on both sides of the box bottom plate in a first direction, and at least one of them is an integral structure with the box bottom plate. Two box side plates are disposed on both sides of the box bottom plate in a second direction, the second direction intersecting the first direction; the box bottom plate, the two box side plates and the two box end plates are configured to form a receiving groove, and the box cover is closed on the opening of the receiving groove and is configured to form the receiving cavity together with the receiving groove.

22. The battery device as claimed in claim 21, characterized in that, The bottom plate of the box is provided with a cavity and is open at least one of the two ends in the second direction; The cavity is provided with a plurality of first partition plates arranged side by side along the first direction to divide the cavity into a plurality of sub-channels, and the plurality of sub-channels are connected to form the heat exchange channel.

23. The battery device as claimed in claim 22, characterized in that, The bottom plate of the box has a first end and a second end opposite to each other in the second direction, and the first end is open. The battery box also includes a current collector, which covers the opening at the first end; the current collector is provided with an inlet port and an outlet port, both of which are connected to the heat exchange channel; one second connector is installed at the inlet port and the other second connector is installed at the outlet port.

24. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 23.

25. The electrical equipment as described in claim 24, characterized in that, The electrical equipment includes an electrical cabinet, and the electrical cabinet includes: Cabinet; Multiple battery devices, the battery devices being housed within a cabinet; and A liquid storage tank, which is connected to the first connector or the second connector via the external pipeline.

26. A connector assembly, characterized in that, include: A first connector has a first flow channel and a first valve core is provided in the first flow channel. The first valve core is used to open or close the first flow channel. as well as The second connector is detachably connected to the first connector; the second connector has a second flow channel, and a second valve core is provided in the second flow channel, the second valve core being used to open or close the second flow channel. When the first connector and the second connector are separated, the first valve core closes the first connector, and the second valve core closes the second connector.

27. The connector assembly as claimed in claim 26, characterized in that, The first connector is provided with an insertion interface that communicates with the first flow channel. A sealing ring is provided inside the first flow channel, and the sealing ring is located on the side of the first valve core near the insertion interface.

28. The connector assembly as claimed in claim 26, characterized in that, The first valve core has a first abutting surface, and the second valve core has a second abutting surface that mates with the first abutting surface; The first connector is provided with a plug-in interface, and the second connector can be inserted into the first connector through the plug-in interface. The first abutting surface and the second abutting surface abut against each other to make the first flow channel and the second flow channel communicate with each other. The connector assembly further includes a sealing ring, which is disposed around the second connector and is configured to seal the gap between the first connector and the second connector at the insertion and mating position. The distance between the first abutting surface and the end face where the insertion interface is located is the first distance, and the distance between the sealing ring and the second abutting surface is the second distance; the first distance is greater than the second distance.

29. The connector assembly as claimed in any one of claims 26 to 28, characterized in that, The first valve core includes a first piston, a first elastic element, and a push rod; the push rod is installed in the first flow channel, the first elastic element is annularly disposed on the push rod, and the first piston is movably disposed in the first flow channel in an open position and a closed position. The second valve core includes a second piston and a second elastic element, wherein the second piston is movably and switchably disposed in the second flow channel in an open position and a closed position; When the second connector is inserted into the first connector, the second connector abuts against the first piston, the first piston is in the open position, and the first elastic element is in the energy storage state; the push rod abuts against the second piston, the second piston is in the open position, and the second elastic element is in the energy storage state; When the second connector and the first connector are separated, the first elastic element releases its stored energy to reset the first piston to the closed position, and the second elastic element releases its stored energy to reset the second piston to the closed position.

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