Connecting device, battery device and power utilization device

Abstract

The utility model discloses a connecting device, a battery device and a power utilization device. The connecting device comprises a first connector, a second connector, a first sealing piece and a second sealing piece, the first connector comprises a first inserting part and a first connecting part which are connected with each other, and the first inserting part protrudes out of the first connecting part; the second connector comprises a second insertion part, the second insertion part is provided with an insertion hole, and the first insertion part is inserted into the insertion hole along the insertion direction; the first sealing piece is clamped between the first connecting part and the second inserting part; in the radial direction perpendicular to the inserting direction, the second sealing piece is clamped between the inner side wall of the inserting hole and the outer side wall of the first inserting part. Therefore, while double-layer sealing is achieved through the first sealing piece and the second sealing piece, the distance between the first sealing piece and the second sealing piece can be increased, the sealing effect of the connecting device is improved, and the risk that the connecting device fails due to the fact that external impurities enter the position between the first connector and the second connector is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a connecting device, a battery device and a power utilization device. BACKGROUND

[0002] Energy saving and emission reduction are the key to sustainable development, which promotes the adjustment of energy structure and the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology, which has been widely used in portable electronics, electric vehicles and energy storage systems due to its high energy density, good cycle ability, high working voltage, environmental protection and low self-discharge.

[0003] The current electric vehicle charging time is long, even if it is direct current charging, it also needs at least half an hour of time, especially for operating vehicles, the arrival of battery replacement technology solves the problem of long charging time and range demand, the connecting device as the core component of battery replacement operation can quickly disassemble and connect the battery pack and the vehicle, but the existing connecting device has poor sealing effect, which easily affects the normal operation of the electric vehicle. CONTENT OF THE INVENTION

[0004] The main purpose of the present application is to provide a connecting device, a battery device and a power utilization device, which aims to solve the above technical problems existing in the prior art.

[0005] In order to solve the above problems, the present application provides a connecting device, which comprises a first connector, a second connector, a first sealing member and a second sealing member, the first connector comprises a first plug-in part and a first connecting part connected with each other, the first plug-in part protrudes from the first connecting part; the second connector comprises a second plug-in part, the second plug-in part is provided with a plug-in hole, the first plug-in part is inserted into the plug-in hole along the plug-in direction; the first sealing member is clamped between the first connecting part and the second plug-in part; in the radial direction perpendicular to the plug-in direction, the second sealing member is clamped between the inner side wall of the plug-in hole and the outer side wall of the first plug-in part. Thus, the first plug-in part is inserted into the plug-in hole along the plug-in direction, so that the first connector and the second connector can be quickly disassembled and assembled, the first sealing member is clamped between the first connecting part and the second plug-in part, and the second sealing member is clamped between the inner side wall of the plug-in hole and the outer side wall of the first plug-in part. While achieving double sealing through the first sealing member and the second sealing member, the space between the first sealing member and the second sealing member can also be increased, the sealing effect of the connecting device is improved, and the risk of failure of the connecting device due to the entry of external impurities between the first connector and the second connector is reduced.

[0006] In some embodiments, the first sealing member comprises a first sub-sealing member, the first connecting portion comprises an end face portion, the first plug-in portion is connected with the end face portion and protrudes from the end face portion, and the first sub-sealing member is clamped between the end face portion and the second plug-in portion in the plug-in direction. In this way, the first sub-sealing member is clamped between the end face portion and the second plug-in portion in the plug-in direction, which can improve the sealing effect of the connecting device, and also can reduce the installation difficulty of the first sub-sealing member.

[0007] In some embodiments, the end face portion and / or the second plug-in portion is formed with a first accommodating groove, and the first sub-sealing member is at least partially located in the first accommodating groove. In this way, the first sub-sealing member is at least partially located in the first accommodating groove, which can position and install the first sub-sealing member through the first accommodating groove.

[0008] In some embodiments, the first sub-sealing member is annular, and the first sub-sealing member is arranged around the first plug-in portion in the plug-in direction. In this way, the first sub-sealing member is annular, and the first sub-sealing member is arranged around the first plug-in portion in the plug-in direction, which can seal the first plug-in portion from all around through the first sub-sealing member, and further improve the sealing effect of the connecting device.

[0009] In some embodiments, the second plug-in portion comprises a first sub-plug-in portion and a second sub-plug-in portion connected with each other, the first sub-plug-in portion is closer to the end face portion than the second sub-plug-in portion, the size of the first sub-plug-in portion in the radial direction is greater than the size of the second sub-plug-in portion in the radial direction, the first sub-sealing member is clamped between the first sub-plug-in portion and the end face portion, and the second sealing member is clamped between the second sub-plug-in portion and the first plug-in portion. In this way, the size of the first sub-plug-in portion in the radial direction is greater than the size of the second sub-plug-in portion in the radial direction, the first sub-sealing member is clamped between the first sub-plug-in portion and the end face portion, and the second sealing member is clamped between the second sub-plug-in portion and the first plug-in portion, which can increase the distance between the first sub-sealing member and the second sealing member, and further reduce the risk that the connecting device fails due to the entry of external impurities between the first connector and the second connector.

[0010] In some embodiments, the first connecting portion comprises a side wall portion, the side wall portion is arranged in the radial direction and spaced apart from the first plug-in portion, part of the second plug-in portion is located between the first plug-in portion and the side wall portion, and the first sealing member comprises a second sub-sealing member, the second sub-sealing member is clamped between the second plug-in portion and the side wall portion. In this way, the second sub-sealing member is clamped between the second plug-in portion and the side wall portion, which can improve the sealing effect of the connecting device, and also can reduce the installation difficulty of the second sub-sealing member.

[0011] In some embodiments, the first connecting portion comprises an end face portion, the side wall portion and the first plug-in portion are connected with the end face portion, and the second sub-seal is located at an end of the side wall portion away from the end face portion. In this way, the second sub-seal is located at an end of the side wall portion away from the end face portion, the spacing between the second sub-seal and the second seal can be increased, and the risk of failure of the connecting device due to the entry of external impurities between the first connector and the second connector can be further reduced.

[0012] In some embodiments, the second plug-in portion comprises a first sub-plug-in portion, the first sub-plug-in portion is at least partially located between the side wall portion and the first plug-in portion, and the size of the first sub-plug-in portion closer to the side wall portion in the radial direction is larger. In this way, a cavity can be formed between the first sub-plug-in portion and the side wall portion for accommodating at least part of the impurities entering from the second sub-seal, so as to reduce the risk of failure of the connecting device due to the entry of external impurities between the first connector and the second connector.

[0013] In some embodiments, the outer side wall of the second plug-in portion and / or the side wall portion is provided with a second accommodating groove, and the second sub-seal is at least partially located in the second accommodating groove. In this way, the second sub-seal is at least partially located in the second accommodating groove, and the second sub-seal can be positioned by the second accommodating groove.

[0014] In some embodiments, the second sub-seal is annular, and the second sub-seal is arranged around the first plug-in portion in the plug-in direction. In this way, the second sub-seal is annular, and the second sub-seal is arranged around the first plug-in portion in the plug-in direction, so that the second sub-seal can seal from all around the first plug-in portion, and the sealing effect of the connecting device can be further improved.

[0015] In some embodiments, the outer side wall of the first plug-in portion is provided with a third accommodating groove, and the second seal is partially located in the third accommodating groove, and / or the inner side wall of the second plug-in portion is provided with a fourth accommodating groove, and the second seal is partially located in the fourth accommodating groove. In this way, the second seal is partially located in the third accommodating groove and / or the fourth accommodating groove, and the second seal can be positioned by the third accommodating groove and / or the fourth accommodating groove.

[0016] In some embodiments, the second seal is annular, and the second seal is arranged around the first plug-in portion in the plug-in direction. In this way, the second seal is annular, and the second seal is arranged around the first plug-in portion in the plug-in direction, so that the second seal can seal from all around the first plug-in portion, and the sealing effect of the connecting device can be further improved.

[0017] In some embodiments, the second connector comprises a second connecting portion and at least one fixing member, the second plug-in portion and the second connecting portion are fixedly connected, and the at least one fixing member is located on a side of the second connecting portion away from the second plug-in portion, and the at least one fixing member is used for fixedly connecting with an external device. In this way, the at least one fixing member and the second plug-in portion are both fixed with the second connecting portion, and the at least one fixing member is used for fixedly connecting with an external device, so that the second plug-in portion can be conveniently installed and fixed through the second connecting portion and the at least one fixing member, and the production efficiency is improved.

[0018] In some embodiments, the first connector further comprises a positioning column, the positioning column and the first plug-in portion are fixedly connected to the same side of the first connecting portion, and the positioning column is used for fixing with a battery device. In this way, the positioning column and the first plug-in portion are fixedly connected to the same side of the first connecting portion, so that the first plug-in portion can be conveniently installed and fixed through the positioning column and the first connecting portion, and the production efficiency is improved.

[0019] To solve the above problems, the application provides a battery device, which comprises a battery module, a battery box and a connecting device as described above, the battery module is located in the battery box, and one of the first connector and the second connector is fixedly connected with the battery box.

[0020] To solve the above problems, the application provides a power consumption device, which comprises a battery device as described above. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 is a structural schematic diagram of a vehicle according to one or more embodiments of the present application;

[0023] Figure 2 is an exploded structural schematic diagram of a battery device according to one or more embodiments of the present application;

[0024] Figure 3 is a first structural schematic diagram of a connecting device according to one or more embodiments of the present application;

[0025] Figure 4 is a structural schematic diagram of a connecting device according to one or more embodiments of the present application; Figure 3 is an exploded structural schematic diagram of a connecting device shown in FIG. 4;

[0026] Figure 5 is a structural schematic diagram of a connecting device according to one or more embodiments of the present application;Figure 3 A cross-sectional structural schematic view of the connection device shown;

[0027] Figure 6 is an enlarged schematic view of the structure in the dashed box A; Figure 5

[0028] Figure 7 is a second structural schematic view of the connection device according to one or more embodiments of the present application;

[0029] Figure 8 is a third structural schematic view of the connection device according to Figure 7 A disassembled structural schematic view of the connection device shown;

[0030] Figure 9 is a fourth structural schematic view of the connection device according to Figure 7 A cross-sectional structural schematic view of the connection device shown;

[0031] Figure 10 is an enlarged schematic view of the structure in the dashed box B. Figure 9

[0032] Reference numerals: vehicle 1; battery device 2; controller 3; motor 4; connection device 10; battery box 20; first part 21; second part 22; battery module 30; first connector 100; first plug-in part 110; third accommodating groove 111; first connecting part 120; end face part 121; first accommodating groove 122; side wall part 123; positioning column 130; second connector 200; second plug-in part 210; first sub-plug-in part 211; second sub-plug-in part 212; second accommodating groove 213; fourth accommodating groove 214; second connecting part 220; fixing member 230; plug-in hole 240; second sealing member 300; first sealing member 400; first sub-sealing member 410; second sub-sealing member 420; radial direction X; plug-in direction Y. DETAILED DESCRIPTION

[0033] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0034] 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 belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0035] ​​In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0036] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0038] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0039] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0040] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing", and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0041] At present, from the development of market situation, the application of battery is more and more widely. The battery is not only applied to the energy storage power system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, electric transportation tools and aerospace and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing.

[0042] The battery mentioned in the art can be divided into primary battery and rechargeable battery according to whether it can be charged. The primary battery is also called "disposable" battery and primary cell, because it cannot be charged for use after its power is consumed, and can only be discarded. The rechargeable battery is also called secondary battery or secondary cell, storage battery. The manufacturing materials and process of rechargeable battery are different from those of primary battery, and its advantage is that it can be used repeatedly after charging. The output current load of rechargeable battery is higher than that of most primary batteries. The common types of rechargeable batteries at present are: lead-acid battery, nickel-hydrogen battery and lithium-ion battery. Lithium-ion battery has the advantages of light weight, large capacity (the capacity is 1.5 times to 2 times of the same weight of nickel-hydrogen battery), no memory effect and very low self-discharge rate, so even if the price is relatively high, it is still widely used. Lithium-ion battery is also widely used in pure electric vehicles and hybrid electric vehicles. The capacity of lithium-ion battery used for such purpose is relatively low, but it has high output, charging current and long service life, but the cost is high.

[0043] The battery described in the embodiments of the present application refers to a rechargeable battery or a primary battery. Hereinafter, the embodiments of the present application will be mainly described taking lithium-ion battery as an example. It should be understood that the embodiments of the present application are applicable to any other appropriate type of rechargeable battery. The battery mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to appropriate devices to power the devices.

[0044] The present application provides a power consuming device, which can include but is not limited to mobile phones, tablets, notebook computers, electric toys, electric tools, electric vehicles, electric vehicles, ships, spacecraft and the like. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, etc. Spacecraft can include airplanes, rockets, space shuttles and spacecraft, etc. Among them, the power consuming device can include a battery, and the power consuming device can provide electric energy through the battery to realize the corresponding function.

[0045] The present application also provides an electric vehicle, which can include a battery device.

[0046] Please refer to Figure 1 ,Figure 1 is a structural schematic diagram of a vehicle according to one or more embodiments of the present application.

[0047] The vehicle 1 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle 1 is internally provided with a battery device 2, which can be arranged at the bottom, the head, or the tail of the vehicle 1. The battery device 2 can be used for power supply of the vehicle 1, for example, the battery device 2 can be used as an operating power source of the vehicle 1. The vehicle 1 can further include a controller 3 and a motor 4, and the controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, to meet the power demand of the vehicle 1 during starting, navigation, and driving.

[0048] In some embodiments of the present application, the battery device 2 can not only be used as an operating power source of the vehicle 1, but also be used as a driving power source of the vehicle 1, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1.

[0049] In order to improve the performance of the electric device, the present application further provides a battery device, which is described with reference to Figure 2 , Figure 2 is an exploded structural schematic diagram of a battery device according to one or more embodiments of the present application.

[0050] The shape of the battery device 2 can include but is not limited to a square cylinder or any other shape.

[0051] In some embodiments, the battery device 2 can include a battery box 20 and a battery module 30, and the battery module 30 is accommodated in the battery box 20. The battery box 20 is used to provide an accommodation space for the battery module 30, and the battery box 20 can adopt various structures. In some embodiments, the battery box 20 can include a first part 21 and a second part 22, and the first part 21 and the second part 22 are mutually covered. The first part 21 and the second part 22 jointly define an accommodation space for accommodating battery monomers. The second part 22 can be a hollow structure with one end open, and the first part 21 can be a plate structure, which is covered on the open side of the second part 22 to jointly define the accommodation space with the second part 22. The first part 21 and the second part 22 can also be hollow structures with one side open, and the open side of the first part 21 is covered on the open side of the second part 22.

[0052] In the battery device 2, the battery module 30 may include multiple battery cells, which can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells are connected in both series and parallel configurations. Multiple battery cells can be directly connected in series, parallel, or a combination thereof, and then the entire assembly of these battery cells is housed within the battery box 20. Alternatively, the battery device 2 may include multiple battery modules 30, where the battery cells of each module 30 can first be connected in series, parallel, or a combination thereof, and then the multiple battery modules 30 can be connected in series, parallel, or a combination thereof to form a whole, which is then housed within the battery box 20. The battery device 2 may also include other structures; for example, it may include a busbar component for electrical connection between multiple battery cells.

[0053] Currently, electric vehicles have long charging times, even DC charging takes at least half an hour, especially for commercial vehicles. Battery swapping technology has solved the problems of range requirements and long charging times. The connecting device 10, as a core component of the battery swapping operation, allows for quick connection and disconnection of the battery pack and the vehicle. The connecting device 10 may include a first connector and a second connector. One of the first and second connectors can be the socket portion of the connecting device 10, and the other can be the plug portion. The socket portion is used to fix the battery pack of the battery device 2, and the plug portion is used to fix the battery device 2 to the vehicle, enabling the replacement of the battery device 2 through the connecting device 10. However, the sealing effect of the connecting device 10 in related technologies is poor, which can easily affect the normal operation of the electric vehicle.

[0054] To address the technical problems existing in the related technologies, this application provides a connecting device, which includes at least two sealing elements. The at least two sealing elements are clamped between different positions of two plug-in devices of the connecting device, thereby improving the sealing effect of the connecting device.

[0055] Specifically, see Figures 3 to 6 , Figure 3 This is a first structural schematic diagram of a connection device according to one or more embodiments of this application. Figure 4 It is based on Figure 3 The diagram shows the disassembled structure of the connecting device. Figure 5 It is based on Figure 3 The diagram shows a cross-sectional view of the connecting device. Figure 6 yes Figure 5 An enlarged schematic diagram of the structure within the dashed box A.

[0056] The connecting device 10 comprises a first connector 100, a second connector 200, a first seal 400 and a second seal 300. The first connector 100 comprises a first plug-in part 110 and a first connecting part 120 connected with each other, and the first plug-in part 110 protrudes from the first connecting part 120. The second connector 200 comprises a second plug-in part 210 provided with a plug-in hole 240, and the first plug-in part 110 is inserted into the plug-in hole 240 along a plug-in direction Y. The first seal 400 is arranged between the first connecting part 120 and the second plug-in part 210, and the second seal 300 is arranged between an inner side wall of the plug-in hole 240 and an outer side wall of the first plug-in part 110 in a radial direction X perpendicular to the plug-in direction Y.

[0057] One of the first connector 100 and the second connector 200 can be a socket part of the connecting device 10, and the other can be a plug part of the connecting device 10. The socket part of the connecting device 10 can be partially installed inside the battery box 20 and partially exposed outside the battery pack, and the plug part of the connecting device 10 can be installed on the vehicle chassis. When the battery replacement operation is needed, the vehicle can enter the battery replacement station, the socket part and the plug part are separated, the battery device 2 and the vehicle are separated, and then the socket part of another battery device 2 is plugged with the plug part of the vehicle, so as to realize the battery replacement operation. The connecting device 10 can be a water connector or an electric connector. Correspondingly, the water connector can connect the liquid in the battery device 2 with the liquid in the vehicle, and the electric connector can connect the battery device 2 with the vehicle.

[0058] The first plug-in part 110 can be integrally arranged with the first connecting part 120, and the first plug-in part 110 protrudes from the first connecting part 120, so as to facilitate the plug-in cooperation between the first plug-in part 110 and the second plug-in part 210. The plug-in hole 240 of the second plug-in part 210 can be matched with the shape of the first plug-in part 110, so as to facilitate that the second plug-in part 210 is sleeved outside the first plug-in part 110 through the plug-in hole 240. The outer side surface of the first plug-in part 110 can be in a columnar shape, and the plug-in direction Y can be an axial direction of the plug-in hole 240 or the first plug-in part 110. When the plug-in cooperation between the first plug-in part 110 and the second plug-in part 210 is needed, the plug-in hole 240 and the first plug-in part 110 can be aligned along the plug-in direction Y, and then the first plug-in part 110 and the second plug-in part 210 are relatively moved, so as to insert the first plug-in part 110 into the plug-in hole 240. When the first plug-in part 110 and the second plug-in part 210 are needed to be separated, the first plug-in part 110 and the second plug-in part 210 can be moved away from each other along the plug-in direction Y.

[0059] The first seal 400 and the second seal 300 can each include a rubber material that can more completely fill the gap after being compressed. The second seal 300 can be located in the insertion hole 240 and clamped between the first insertion portion 110 and the second insertion portion 210 to improve the sealing effect after the first insertion portion 110 and the second insertion portion 210 are inserted by the second seal 300. The second seal 300 can be multiple, and each of the multiple second seals 300 is located in the insertion hole 240 and clamped between the first insertion portion 110 and the second insertion portion 210. The first seal 400 can be located outside the insertion hole 240, and the first seal 400 can be clamped between the first connection portion 120 and the second insertion portion 210 to increase the distance between the first seal 400 and the second seal 300. For example, the first seal 400 can include at least one sub-seal, each of the sub-seals is located outside the insertion hole 240, each of the sub-seals is located at a different position, and each of the sub-seals is clamped between the second insertion portion 210 and the first connection portion 120.

[0060] According to the above embodiments, the first insertion portion 110 is inserted into the insertion hole 240 along the insertion direction Y, so that the first connector 100 and the second connector 200 can be quickly disassembled. The first seal 400 is clamped between the first connection portion 120 and the second insertion portion 210, and the second seal 300 is clamped between the inner side wall of the insertion hole 240 and the outer side wall of the first insertion portion 110. The double sealing effect of the first seal 400 and the second seal 300 can be achieved, and the distance between the first seal 400 and the second seal 300 can be increased. The sealing effect of the connection device 10 can be improved, and the risk of the connection device 10 failing due to external impurities entering between the first connector 100 and the second connector 200 can be reduced.

[0061] Further, the first sealing member 400 comprises a first sub-sealing member 410, the first connecting portion 120 comprises an end face portion 121, the first plug-in portion 110 is connected with the end face portion 121 and protrudes from the end face portion 121, and the first sub-sealing member 410 is clamped between the end face portion 121 and the second plug-in portion 210 in the plug-in direction Y. The end face portion 121 can be in a plate shape, the first plug-in portion 110 can protrude from a surface of the end face portion 121 with a larger area, and the end face portion 121 can be used for fixed connection with the battery box 20 or the vehicle chassis. For example, when the first connector 100 needs to be connected with the battery box 20, the end face portion 121 can be located inside the battery box 20, the end face portion 121 can be fixedly connected with an inner surface of the battery box 20, and the first plug-in portion 110 can extend to the outside of the battery box 20 through a through hole of the battery box 20. After the first plug-in portion 110 and the second plug-in portion 210 are plug-in matched, at least one surface of the end face portion 121 and the second plug-in portion 210 is oppositely arranged, and the first sub-sealing member 410 is clamped between the opposite positions of the end face portion 121 and the second plug-in portion 210, so as to seal and match the end face portion 121 and the second plug-in portion 210 through the first sub-sealing member 410. The material of the first sub-sealing member 410 can comprise rubber material, the first sub-sealing member 410 can be compressed and deformed by the end face portion 121 and the second plug-in portion 210, better filling the gap between the end face portion 121 and the second plug-in portion 210, thereby improving the sealing effect of the connecting device 10, and at the same time, the installation difficulty of the first sub-sealing member 410 can be reduced.

[0062] Further, the end face portion 121 and / or the second plug-in portion 210 is formed with a first accommodating groove 122, and the first sub-seal 410 is at least partially located in the first accommodating groove 122. The first accommodating groove 122 can be in a shape and size matching that of the first sub-seal 410. In an embodiment, the first accommodating groove 122 can be provided only on the end face portion 121 or the second plug-in portion 210 toward the end face portion 121. The first accommodating groove 122 can be recessed relative to the surface of the component in which it is located. The first sub-seal 410 is installed in the first accommodating groove 122, and in a natural state, the first sub-seal 410 can partially protrude from the first accommodating groove 122, so that the portion of the first sub-seal 410 protruding from the first accommodating groove 122 can be compressed by the second plug-in portion 210 and the end face portion 121. In another embodiment, the first accommodating groove 122 can be provided on the end face portion 121 and the second plug-in portion 210 toward the end face portion 121, and the two first accommodating grooves 122 are oppositely arranged. The first sub-seal 410 is partially located in the first accommodating groove 122 of the end face portion 121, and the other portion of the first sub-seal 410 is located in the first accommodating groove 122 of the second plug-in portion 210, so that the first sub-seal 410 can be compressed by the second plug-in portion 210 and the end face portion 121 at the same time. Before the first connector 100 and the second connector 200 are plugged together, the first sub-seal 410 can be installed in the first accommodating groove 122, so that the first sub-seal 410 can be positioned and installed by the first accommodating groove 122.

[0063] In some embodiments, the first sub-seal 410 is annular, and the first sub-seal 410 is arranged around the first plug-in portion 110 along the plug-in direction Y. The shape of the first sub-seal 410 can include, but is not limited to, a circular ring, a fan ring, or an elliptical ring, etc. When the first sub-seal 410 is clamped between the end face portion 121 and the second plug-in portion 210, it can surround the first plug-in portion 110, so that the first sub-seal 410 can seal from the periphery of the first plug-in portion 110, further improving the sealing effect of the connection device 10.

[0064] Further, the second plug-in part 210 comprises a first sub-plug-in part 211 and a second sub-plug-in part 212 connected with each other, the first sub-plug-in part 211 is closer to the end face part 121 relative to the second sub-plug-in part 212, the size of the first sub-plug-in part 211 in the radial direction X is greater than the size of the second sub-plug-in part 212 in the radial direction X, the first sub-seal 410 is clamped between the first sub-plug-in part 211 and the end face part 121, and the second seal 300 is clamped between the second sub-plug-in part 212 and the first plug-in part 110. The first sub-plug-in part 211 and the second sub-plug-in part 212 can be in a cylindrical shape, and the first sub-plug-in part 211 and the second sub-plug-in part 212 are connected to form a plug-in hole 240. When the first connector 100 and the second connector 200 are in a plugged state, the first sub-plug-in part 211 is closer to the end face part 121, so that the first sub-seal 410 is clamped between the first sub-plug-in part 211 and the end face part 121. In this embodiment, the size of the first sub-plug-in part 211 in the radial direction X is greater than the size of the second sub-plug-in part 212 in the radial direction X. After the first sub-seal 410 is clamped between the first sub-plug-in part 211 and the end face part 121, the distance between the first sub-seal 410 and the first plug-in part 110 in the radial direction X can be greater. Further, after the second seal 300 is clamped between the second sub-plug-in part 212 and the first plug-in part 110, the distance between the first sub-seal 410 and the second seal 300 can be greater. When impurities enter between the first sub-seal 410 and the second seal 300 from the first sub-seal 410, the greater distance between the first sub-seal 410 and the second seal 300 can reduce the probability of the impurities directly contacting the second seal 300, thereby reducing the risk of the connection device 10 failing due to the impurities entering between the first connector 100 and the second connector 200 from the second seal 300. Further, a cavity can exist between the first sub-plug-in part 211 and the first plug-in part 110. When impurities enter between the first sub-seal 410 and the second seal 300 from the first sub-seal 410, the impurities can be temporarily stored in the cavity, thereby further reducing the probability of the impurities directly contacting the second seal 300.

[0065] Referring to Figures 7 to 10 , Figure 7 is a second structural schematic view of the connection device 10 according to one or more embodiments of the present application. Figure 8 is a structural schematic view of the connection device 10 according to Figure 7 . Figure 9 is a structural schematic view of the connection device 10 according to Figure 7 . Figure 10 is a structural schematic view of the connection device 10 according to Figure 9 .

[0066] The first connecting portion 120 comprises a side wall portion 123, the side wall portion 123 is arranged in the radial direction X and spaced apart from the first plug-in portion 110, part of the second plug-in portion 210 is located between the first plug-in portion 110 and the side wall portion 123, and the first sealing member 400 comprises a second sub-sealing member 420, the second sub-sealing member 420 is clamped between the second plug-in portion 210 and the side wall portion 123. The side wall portion 123 can be annular, the side wall portion 123 can be arranged around the first plug-in portion 110, the side wall portion 123 is arranged in the radial direction X and spaced apart from the first plug-in portion 110, that is, a gap can be formed between the side wall portion 123 and the first plug-in portion 110, and after the first plug-in portion 110 and the second plug-in portion 210 are plugged together, part of the second plug-in portion 210 is located between the first plug-in portion 110 and the side wall portion 123. The material of the second sub-sealing member 420 can include rubber material, the second sub-sealing member 420 can be compressed and deformed by the side wall portion 123 and the second plug-in portion 210, and better fill the gap between the side wall portion 123 and the second plug-in portion 210, so as to seal the first connector 100 and the second connector 200 from the outside of the second plug-in portion 210, thereby improving the sealing effect of the connecting device 10, and also reducing the installation difficulty of the second sub-sealing member 420.

[0067] Further, the first connecting portion 120 comprises an end face portion 121, the side wall portion 123 and the first plug-in portion 110 are connected with the end face portion 121, and the second sub-sealing member 420 is located at one end of the side wall portion 123 away from the end face portion 121. The end face portion 121 can be plate-shaped, the side wall portion 123 and the first plug-in portion 110 can be protruded on one side surface of the end face portion 121 with larger area, and the end face portion 121 can be used for fixed connection with the battery box 20 or the vehicle chassis. For example, when the first connector 100 needs to be connected with the battery box 20, the end face portion 121 can be located inside the battery box 20, the end face portion 121 can be fixedly connected with the inner surface of the battery box 20, and the first plug-in portion 110 and the side wall portion 123 can extend to the outside of the battery box 20 through the through hole of the battery box 20. After the first plug-in portion 110 and the second plug-in portion 210 are plugged together, the second sub-sealing member 420 is clamped at one end of the side wall portion 123 away from the end face portion 121 by the side wall portion 123 and the second plug-in portion 210. After the impurities enter between the second sub-sealing member 420 and the second sealing member 300 from the second sub-sealing member 420, the probability of the impurities directly contacting the second sealing member 300 can be reduced due to the larger spacing between the second sub-sealing member and the second sealing member 300, thereby reducing the risk that the connecting device 10 fails due to the impurities entering between the first connector 100 and the second connector 200 from the second sealing member 300.

[0068] Further, the second connector 200 further comprises a first sub-connection portion 211, the first sub-connection portion 211 is at least partially located between the side wall portion 123 and the first connection portion 110, and the size of the portion of the first sub-connection portion 211 closer to the side wall portion 123 in the radial direction X is larger. When the first connector 100 and the second connector 200 are in the connected state, the first sub-connection portion 211 is at least partially located between the side wall portion 123 and the first connection portion 110, and the size of the portion of the first sub-connection portion 211 closer to the side wall portion 123 in the radial direction X is larger, so that the first sub-connection portion 211 is at least partially trumpet-shaped, and further can make the space between the first sub-connection portion 211 and the side wall portion 123 form a cavity, the space size of the end of the cavity away from the end face portion 121 can be larger than the space size close to the end face portion 121, when the impurities enter between the second sub-seal 420 and the second seal 300 from the first sub-seal 410, the impurities can be temporarily stored in the cavity, so that the probability of the impurities directly contacting the second seal 300 can be further reduced. In the embodiment, the second connector 200 can further comprise a second sub-connection portion 212, the second sub-connection portion 212 can be connected to the first sub-connection portion 211, the first sub-connection portion 211 and the second sub-connection portion 212 can be cylindrical, the first sub-connection portion 211 and the second sub-connection portion 212 are connected to form the connection hole 240, the first sub-connection portion 211 is closer to the end face portion 121 relative to the second sub-connection portion 212, and the second seal 300 is clamped between the second sub-connection portion 212 and the second connector 200.

[0069] In some embodiments, the outer side wall of the second connector 210 and / or the side wall portion 123 is provided with a second accommodating groove 213, and the second sub-seal 420 is at least partially located in the second accommodating groove 213. The second accommodating groove 213 can be in a shape and size matching that of the second sub-seal 420. In one embodiment, the second accommodating groove 213 can be provided only on the outer side wall of the second connector 210 or the side wall portion 123 towards one side of the second connector 210, and the second accommodating groove 213 can be recessed relative to the surface of the component. The second sub-seal 420 is installed in the second accommodating groove 213, and in a natural state, the second sub-seal 420 can partially protrude from the second accommodating groove 213, so that the portion of the second sub-seal 420 protruding from the second accommodating groove 213 can be compressed by the side wall portion 123 and the second connector 210. In another embodiment, the second accommodating groove 213 can be provided on both the side wall portion 123 and the second connector 210, and the two second accommodating grooves 213 are oppositely arranged. Part of the second sub-seal 420 is located in the second accommodating groove 213 of the side wall portion 123, and another part of the second sub-seal 420 is located in the second accommodating groove 213 of the second connector 210, so that the second sub-seal 420 can be compressed by the second connector 210 and the end face portion 121 at the same time. Before the first connector 100 and the second connector 200 are connected, the second sub-seal 420 can be installed in the second accommodating groove 213, so that the second sub-seal 420 can be positioned by the second accommodating groove 213.

[0070] In some embodiments, the second sub-seal 420 is annular, and the second sub-seal 420 is arranged around the first connector 110 along the connection direction Y. The shape of the second sub-seal 420 can include, but is not limited to, a circular ring, a fan ring, or an elliptical ring, etc. When the second sub-seal 420 is clamped between the side wall portion 123 and the second connector 210, the second sub-seal 420 can surround the first connector 110, so that the first connector 110 can be sealed from all around by the second sub-seal 420, further improving the sealing effect of the connection device 10.

[0071] It should be noted that, as shown in the first structural schematic view of the connection device 10, Figures 3 to 6 as shown in the first structural schematic view of the connection device 10, mainly showing an embodiment in which the first sub-seal 410 is compressed and sealed by the end face portion 121 and the second connector 210, as shown in the second structural schematic view of the connection device 10, Figures 7 to 10 as shown in the second structural schematic view of the connection device 10, mainly showing an embodiment in which the second sub-seal 420 is compressed and sealed by the side wall portion 123 and the second connector 210. It can be understood that, in the connection device 10 as shown in Figures 3 to 6 the side wall portion 123 can also be provided on the end face portion 121, the second sub-seal 420 is clamped between the side wall portion 123 and the second connector 210, and as shown in Figures 7 to 10The connecting device 10 shown can also have a first sub-seal 410 sandwiched between the end face 121 and the second insertion part 210.

[0072] The connecting device 10 can be a water connector or an electrical connector. Taking a water connector as an example, ... Figures 3 to 6 In the first structural schematic diagram of the connecting device 10 shown, the connecting device 10 may be provided with a first insertion part 110, which is provided with both an inlet and an outlet. In this case, only a set of first sealing elements 400 and second sealing elements 300 need to be provided for the first insertion part 110 for sealing. Figures 7 to 10 In the second structural schematic diagram of the connecting device 10 shown, the connecting device 10 may be provided with two first plug-in portions 110. One first plug-in portion 110 may be provided with a water inlet, and the other first plug-in portion 110 may be provided with a water outlet. At this time, a first set of first sealing elements 400 and second sealing elements 300 may be provided for one first plug-in portion 110, and a second set of first sealing elements 400 and second sealing elements 300 may be provided for the other first plug-in portion 110.

[0073] like Figures 3 to 10 As shown, the outer side wall of the first insertion portion 110 is provided with a third receiving groove 111, and the second sealing member 300 is partially located within the third receiving groove 111, and / or the inner side wall of the second insertion portion 210 is provided with a fourth receiving groove 214, and the second sealing member 300 is partially located within the fourth receiving groove 214. The shape and size of the third receiving groove 111 and the fourth receiving groove 214 can match the shape and size of the second sealing member 300. In one embodiment, as... Figures 3 to 6 As shown, a third receiving groove 111 may be provided only on the outer side wall of the first insertion portion 110. The second sealing member 300 is installed in the third receiving groove 111, and in its natural state, the second sealing member 300 may partially protrude from the third receiving groove 111, so that the portion of the second sealing member 300 protruding from the third receiving groove 111 can be compressed by the first insertion portion 110 and the second insertion portion 210. In one embodiment, as... Figures 7 to 10As shown, the fourth accommodating groove 214 can be provided only on the inner side wall of the second plug-in part 210, the second sealing member 300 is installed in the fourth accommodating groove 214, and in a natural state, the second sealing member 300 can partially protrude from the fourth accommodating groove 214, so that the part of the second sealing member 300 protruding from the fourth accommodating groove 214 can be compressed by the first plug-in part 110 and the second plug-in part 210. In other embodiments, a third accommodating groove 111 can be provided on the outer side wall of the first plug-in part 110, and a fourth accommodating groove 214 can be provided on the inner side wall of the second plug-in part 210, the third accommodating groove 111 and the fourth accommodating groove 214 are oppositely arranged, part of the second sealing member 300 is located in the third accommodating groove 111, and the other part of the second sealing member 300 is located in the fourth accommodating groove 214, so that the second sealing member 300 can be compressed by the first plug-in part 110 and the second plug-in part 210 at the same time. Before the first connector 100 and the second connector 200 are plugged and matched, the second sealing member 300 can be installed in the third accommodating groove 111 and / or the fourth accommodating groove 214, so that the second sealing member 300 can be installed and positioned through the third accommodating groove 111 and / or the fourth accommodating groove 214.

[0074] Further, the second sealing member 300 is annular, and the second sealing member 300 is arranged around the first plug-in part 110 around the plug-in direction Y. The shape of the second sealing member 300 can include but is not limited to a circular ring, a fan ring, or an elliptical ring, etc. When the second sealing member 300 is clamped between the first plug-in part 110 and the second plug-in part 210, it can be wrapped around the first plug-in part 110, so that the second sealing member 300 can be sealed from the four sides of the first plug-in part 110, further improving the sealing effect of the connection device 10.

[0075] In some embodiments, the second connector 200 includes a second connecting part 220 and at least one fixing member 230, the second plug-in part 210 and the second connecting part 220 are fixedly connected, and the at least one fixing member 230 is located on the side of the second connecting part 220 away from the second plug-in part 210, and the at least one fixing member 230 is used for fixedly connecting with an external device. The second connecting part 220 can be in a plate structure, the second plug-in part 210 and the at least one fixing member 230 are both fixed with the second connecting part 220, and the shape and size of the first fixing member 230 can be limited according to actual conditions. The external device can include but is not limited to a vehicle chassis or a battery box 20, etc. The fixing member 230 can be fixedly connected with the external device by welding or other forms of detachable connection such as bolts, buckles, etc., so as to facilitate the installation and fixation of the second plug-in part 210 through the second connecting part 220 and the at least one fixing member 230, and improve the production efficiency.

[0076] In some embodiments, the first connector 100 further comprises a positioning column 130 fixedly connected to the same side of the first connecting part 120 as the first plug-in part 110, and the positioning column 130 is used for fixing with the battery device 2. The positioning column 130 can be used to preliminarily position the first connector 100 and the battery device 2, for example, the first connector 100 can be positioned at the corresponding position of the battery box 20 by the positioning column 130 and the corresponding positioning hole on the battery box 20 of the battery device 2, so as to be fixedly connected with the battery box 20 by other ways. Therefore, the positioning column 130 and the first plug-in part 110 are fixedly connected to the same side of the first connecting part 120, which can facilitate the installation and fixation of the first plug-in part 110 through the positioning column 130 and the first connecting part 120, and improve the production efficiency.

[0077] In summary, the first plug-in part 110 is inserted into the plug-in hole 240 along the plug-in direction Y, so that the first connector 100 and the second connector 200 can be quickly disassembled and assembled, the first sealing member 400 is clamped between the first connecting part 120 and the second plug-in part 210, and the second sealing member 300 is clamped between the inner side wall of the plug-in hole 240 and the outer side wall of the first plug-in part 110. While achieving double sealing through the first sealing member 400 and the second sealing member 300, the spacing between the first sealing member 400 and the second sealing member 300 can be increased, the sealing effect of the connecting device 10 can be improved, and the risk of failure of the connecting device 10 due to the entry of external impurities between the first connector 100 and the second connector 200 can be reduced.

[0078] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A connection device, characterized in that The connecting device comprises: a first connector comprising a first plug-in portion and a first connecting portion connected to each other, the first plug-in portion protruding from the first connecting portion; a second connector comprising a second plug-in portion provided with a plug-in hole, the first plug-in portion being inserted into the plug-in hole along a plug-in direction; a first seal member clamped between the first connecting portion and the second plug-in portion; a second seal member clamped between an inner side wall of the plug-in hole and an outer side wall of the first plug-in portion in a radial direction perpendicular to the plug-in direction.

2. The connection device according to claim 1, characterized in that The first seal member comprises a first sub-seal member, the first connecting portion comprises an end face portion, the first plug-in portion is connected to the end face portion and protrudes from the end face portion, and the first sub-seal member is clamped between the end face portion and the second plug-in portion in the plug-in direction.

3. The connection device according to claim 2, characterized in that The end face portion and / or the second plug-in portion is / are formed with a first accommodating groove, and the first sub-seal member is at least partially located in the first accommodating groove.

4. The connection device of claim 2, wherein The first sub-seal member is annular, and the first sub-seal member is arranged around the first plug-in portion in the plug-in direction.

5. The connection device of claim 2, wherein The second plug-in portion comprises a first sub-plug-in portion and a second sub-plug-in portion connected to each other, the first sub-plug-in portion is closer to the end face portion than the second sub-plug-in portion, the size of the first sub-plug-in portion in the radial direction is greater than the size of the second sub-plug-in portion in the radial direction, the first sub-seal member is clamped between the first sub-plug-in portion and the end face portion, and the second seal member is clamped between the second sub-plug-in portion and the first plug-in portion.

6. The connection device of claim 1, wherein The first connecting portion comprises a side wall portion spaced apart from the first plug-in portion in the radial direction, and part of the second plug-in portion is located between the first plug-in portion and the side wall portion, the first seal member comprises a second sub-seal member clamped between the second plug-in portion and the side wall portion.

7. The connection device according to claim 6, characterized in that The first connecting portion comprises an end face portion, the side wall portion and the first plug-in portion are connected to the end face portion, and the second sub-seal member is located at an end of the side wall portion away from the end face portion.

8. The connection device according to claim 7, characterized in that The second plug-in portion comprises a first sub-plug-in portion, the first sub-plug-in portion is at least partially located between the side wall portion and the first plug-in portion, and the size of the part of the first sub-plug-in portion closer to the side wall portion in the radial direction is greater.

9. The connection device of claim 6, wherein, An outer side wall of the second plug-in portion and / or the side wall portion is provided with a second accommodating groove, and the second sub-seal member is at least partially located in the second accommodating groove.

10. The connection device of claim 6, wherein The second sub-seal member is annular, and the second sub-seal member is arranged around the first plug-in portion in the plug-in direction.

11. The connection device of claim 1, wherein An outer side wall of the first plug-in portion is provided with a third accommodating groove, and the second seal member is partially located in the third accommodating groove, and / or an inner side wall of the second plug-in portion is provided with a fourth accommodating groove, and the second seal member is partially located in the fourth accommodating groove.

12. The connection device of claim 1, wherein, The second seal member is annular, and the second seal member is arranged around the first plug-in portion in the plug-in direction.

13. The connection device of claim 1, wherein, The second connector comprises a second connecting part and at least one fixing part, the second plug-in part is fixedly connected with the second connecting part, and the at least one fixing part is located on a side of the second connecting part away from the second plug-in part, and the at least one fixing part is used for fixedly connecting with an external device.

14. The connection device according to any one of claims 1 to 13, characterized in that The first connector further comprises a positioning column, the positioning column and the first plug-in part are fixedly connected to the same side of the first connecting part, and the positioning column is used for fixing a battery device.

15. A battery device characterized by comprising: The battery device comprises a battery module, a battery box and the connecting device as claimed in any one of claims 1 to 14, the battery module is located in the battery box, and one of the first connector and the second connector is fixedly connected with the battery box.

16. An electrical device, comprising: The power consumption device comprises the battery device as claimed in claim 15.

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