Female connector, male connector, connector, liquid cooling device, battery pack and vehicle

Abstract

The embodiment of the invention provides a female connector, a male connector, a connector, a liquid cooling device, a battery pack and a vehicle, and relates to the technical field of connectors, the female connector comprises a first body, a first valve element and a first elastic piece, the first body is internally provided with a first through cavity, the first through cavity is used for being connected with a first external pipeline, the first valve element is inserted in the first through cavity, and the first elastic piece is used for being connected with the first external pipeline; the first elastic piece is connected with the first valve element so that the first valve element can close the first through cavity. A first annular groove is formed in the end of the first body and used for being communicated with a cooling liquid flow channel in a male connector, and the end, provided with the first annular groove, of the first body is communicated with the first annular groove through a connecting pipeline. According to the female connector provided by the embodiment of the invention, when the female connector is separated from the male connector, residual cooling liquid at the end part of the first body flows into the first ring groove, so that the leakage of the cooling liquid can be avoided.

Description

Technical Field

[0001] The present application relates to the field of connector technology, and in particular to a female connector, a male connector, a connector, a liquid cooling device, a battery pack and a vehicle. Background Art

[0002] Quick-change connectors, also known as quick connectors, can quickly install and replace various configuration parts through rapid docking, and are widely used in industrial products.

[0003] The battery pack is usually equipped with liquid cooling components and pipelines to manage the heat of the battery. In the related art, quick-change connectors are widely used at the liquid inlet and outlet of the battery pack to improve the connection and replacement efficiency of the battery pack.

[0004] However, the quick-change connectors on existing battery packs leak when separated, which affects the on-site environment and user experience. Summary of the invention

[0005] Based on this, the present application provides a female connector, a male connector, a connector, a liquid cooling device, a battery pack and a vehicle to solve the problem of liquid leakage when the quick-change connector on the existing battery pack is separated.

[0006] In a first aspect, the present application provides a female connector, including a first body, a first valve core and a first elastic member, wherein the first body has a first through cavity, the first through cavity is used to connect a first external pipeline, the first valve core is inserted in the first through cavity, and the first elastic member is connected to the first valve core so that the first valve core closes the first through cavity;

[0007] A first annular groove is provided at the end of the first body, and the first annular groove is used to communicate with the coolant flow channel on the male connector. The end of the first body provided with the first annular groove is communicated with the first annular groove through a connecting pipeline.

[0008] In a possible implementation, a first annular pressure head is further provided at the end of the first body, and the first annular pressure head is located inside the first annular groove;

[0009] The first annular pressure head is used to correspond to the second annular groove on the male connector, and the inner side of the first annular pressure head is connected to the first annular groove through a connecting pipeline;

[0010] When the female connector and the male connector are butt-jointed, the first annular pressure head is inserted into the first annular groove;

[0011] When the female connector and the male connector are separated, the first annular pressure head is moved out of the first annular groove, and the residual coolant on the inner side of the first annular pressure head is sucked into the first annular groove through the connecting pipeline.

[0012] In a possible implementation, the connecting pipeline is a first channel provided in the first body, and the inner side of the first annular pressure head is connected to the first annular groove through the first channel.

[0013] In a possible implementation, the first channel is communicated with a first through cavity on the first body close to an end of the first annular groove.

[0014] In a possible implementation, it also includes a piston ring assembly and a second elastic member, and the piston ring assembly is movably disposed in the first ring groove;

[0015] The piston ring assembly and the first ring groove enclose a liquid storage cavity, and the liquid storage cavity is connected to the end of the first body provided with the first ring groove through a connecting pipeline;

[0016] The second elastic member is connected to the piston ring assembly and is used to hold the piston ring assembly toward the opening direction of the first ring groove.

[0017] In a possible implementation, the piston ring assembly includes a piston ring body and a first sealing member, wherein the piston ring body is disposed in the first ring groove and moves along the opening direction of the first ring groove;

[0018] The second elastic member is inserted in the first ring groove, one end of the second elastic member abuts against the end of the piston ring body, and the other end of the second elastic member abuts against the bottom of the first ring groove;

[0019] The first sealing member is arranged on the piston ring body and is sealingly connected to the inner and outer ring surfaces of the first ring groove.

[0020] In a possible implementation, a first positioning portion is provided on the piston ring body, and the first positioning portion is used to be positioned and connected with a third positioning portion on the male connector.

[0021] In a possible implementation, a first sealing surface is provided on the first body, the first sealing surface is located on one side of the first through cavity, and the other side of the first through cavity is used to connect the first external pipeline;

[0022] The first valve core has a second sealing surface matching the first sealing surface, and the first elastic member causes the second sealing surface to abut against the first sealing surface.

[0023] In a possible implementation, a first stopper is provided on the first body, the first stopper is located in the first through cavity, and a second stopper is provided on the first valve core;

[0024] The first elastic member is sleeved on the first valve core, one end of the first elastic member abuts against the first stopper, and the other end of the first elastic member abuts against the second stopper.

[0025] In a possible implementation, the first valve core is provided with a first opening cavity and a first communicating hole communicating with the first opening cavity, the opening of the first opening cavity faces a side away from the first sealing surface, and the first communicating hole is located between the first stopper and the first sealing surface.

[0026] In a possible implementation, a second positioning portion is provided on the first valve core, and the second positioning portion is used to be positioned and connected with a fourth positioning portion on the male connector.

[0027] In a possible implementation, a second sealing member is provided on the inner annular surface of the first annular pressure head, and the second sealing member is used for sealingly connecting with the inner and outer annular surfaces of the second annular groove.

[0028] In a possible implementation, when the female connector and the male connector are connected, the first valve core is pressed against the male connector to overcome the elastic force of the first elastic member and open the first through cavity;

[0029] When the female connector and the male connector are separated, the first valve core is separated from the male connector, and under the action of the first elastic member, the first valve core closes the first through cavity, and the residual coolant at the end of the first body flows into the first annular groove through the connecting pipeline.

[0030] In a second aspect, the present application further provides a male connector, including a second body, a second valve core and a third elastic member, wherein the second body has a second through cavity, the second through cavity is used to connect a second external pipeline, the second valve core is inserted in the second through cavity, and the third elastic member is connected to the second valve core so that the second valve core closes the second through cavity;

[0031] A second annular pressure head is provided at the end of the second body, and the second annular pressure head is suitable for communicating with the coolant flow channel on the female connector.

[0032] In a possible implementation, a second annular groove is further provided at the end of the second body, the second annular groove is located inside the second annular pressure head, and the second annular groove corresponds to the first annular pressure head on the female connector.

[0033] In a possible implementation manner, a second channel is provided in the second body, and the second annular groove is connected to the outside through the second channel.

[0034] In a possible implementation, the outer annular surface of the second annular groove is used to leave a preset gap with the first annular pressure head on the female connector.

[0035] In a possible implementation, a third positioning portion is provided on the second annular pressure head, and the third positioning portion is used to be positioned and connected with the first positioning portion on the female connector.

[0036] In a possible implementation, a third sealing surface is provided on the second body, and the third sealing surface is located on one side of the second through cavity, and the other side of the second through cavity is used to connect the second external pipeline;

[0037] The second valve core is provided with a fourth sealing surface matching the third sealing surface, and the third elastic member causes the fourth sealing surface to abut against the third sealing surface.

[0038] In a possible implementation, a third stopper is provided on the second body, the third stopper is located in the second through cavity, and a fourth stopper is provided on the second valve core;

[0039] The third elastic member is sleeved on the second valve core, one end of the third elastic member abuts against the third stopper, and the other end of the third elastic member abuts against the fourth stopper.

[0040] In a possible implementation, the second valve core is provided with a second opening cavity and a second communicating hole communicating with the second opening cavity, the opening of the second opening cavity faces the side away from the third sealing surface, and the second communicating hole is located between the third stopper and the third sealing surface.

[0041] In a possible implementation, a fourth positioning portion is provided on the second valve core, and the fourth positioning portion is used to be positioned and connected with the second positioning portion on the female connector.

[0042] In a possible implementation, a third seal is provided on at least one of the inner ring surface and the outer ring surface of the second annular pressure head, and the third seal is used for sealing connection with the inner ring surface and / or the outer ring surface of the first annular groove.

[0043] In a possible implementation, the second annular pressure head corresponds to the first annular groove on the female connector.

[0044] In a third aspect, the present application further provides a connector, comprising any one of the female connectors provided in the first aspect and any one of the male connectors provided in the second aspect.

[0045] In a fourth aspect, the present application further provides a liquid cooling device, comprising a device body, on which is disposed any one of the female connectors provided in the first aspect;

[0046] Alternatively, the device body is provided with any one of the male connectors provided in the second aspect;

[0047] Alternatively, the device body is provided with a connector as provided in the third aspect.

[0048] In a fifth aspect, the present application further provides a battery pack, including a battery pack body, wherein the battery pack body is provided with any one of the female connectors provided in the first aspect;

[0049] Alternatively, the battery pack body is provided with any one of the male connectors provided in the second aspect;

[0050] Alternatively, the battery pack body is provided with a connector as provided in the third aspect;

[0051] Alternatively, a liquid cooling device as provided in the fourth aspect is provided on the battery pack body.

[0052] In a sixth aspect, the present application also provides a vehicle, including a vehicle body, on which the battery pack provided in the fifth aspect is arranged.

[0053] The female connector, male connector, connector, liquid cooling device, battery pack and vehicle provided by the present application, the female connector includes a first body, a first valve core and a first elastic member, by setting a first through cavity in the first body, so that the first through cavity is connected to a first external pipeline, by inserting the first valve core in the first through cavity, setting a first elastic member connected to the first valve core, so that the first valve core closes the first through cavity, so that it is in a closed state when not docked, by setting a first annular groove at the end of the first body, setting the first annular groove to communicate with the coolant flow channel on the male connector, and the end of the first body provided with the first annular groove is connected to the first annular groove through a connecting pipeline. Therefore, when the female connector provided by the present application is separated from the male connector, the residual coolant at the end of the first body flows into the first annular groove through the connecting pipe, which can avoid or greatly reduce the leakage of coolant, thereby avoiding pollution of the on-site environment and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0055] Figure 1 A schematic diagram of the main cross-sectional structure of a female connector provided in an embodiment of the present application;

[0056] Figure 2 A schematic diagram of the main cross-sectional structure of a male connector provided in an embodiment of the present application;

[0057] Figure 3 A schematic diagram of the main cross-sectional structure of a connector in a first state provided by an embodiment of the present application;

[0058] Figure 4 A schematic diagram of the main cross-sectional structure of the second state of the connector provided in an embodiment of the present application.

[0059] Reference numerals:

[0060] 100: female connector;

[0061] 110: first body; 111: first through cavity; 112: first annular groove; 113: first annular pressure head; 1131: second sealing member; 114: first channel; 115: first sealing surface; 116: first stopper; 120: first valve core; 121: second sealing surface; 122: second stopper; 123: first opening cavity; 124: first communicating hole; 125: second positioning portion; 130: first elastic member; 140: piston ring assembly; 141: piston ring body; 1411: first positioning portion; 142: first sealing member; 150: second elastic member;

[0062] 200: Male connector;

[0063] 210: second body; 211: second through cavity; 212: second annular pressure head; 2121: third positioning portion; 2122: third sealing member; 213: second annular groove; 214: second channel; 215: third sealing surface; 216: third stop portion; 220: second valve core; 221: fourth sealing surface; 222: fourth stop portion; 223: second opening cavity; 224: second communicating hole; 225: fourth positioning portion; 230: third elastic member. DETAILED DESCRIPTION

[0064] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of methods and devices consistent with some aspects of the present application as detailed in the appended claims.

[0065] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0066] As mentioned in the background technology section, when the existing quick-change connector is separated, the residual coolant will seep out from the gap of the connector. In the related technology, a liquid retaining ring is set on one connector end face, and a liquid retaining groove is set on the other connector end face. The liquid is blocked by plugging and unplugging the liquid retaining ring and the liquid retaining groove. Although it will not leak to the surrounding environment immediately when separated, the residual coolant in the liquid retaining ring still needs to be processed separately, which is time-consuming and laborious. Moreover, since the liquid retaining ring and the liquid retaining groove are tightly matched, when plugging, the gas in the liquid retaining groove prevents the liquid retaining ring from being inserted, and there is also air entrapment between the end faces of the two connectors; and when separating, the liquid retaining ring is not easy to be pulled out of the liquid retaining groove due to negative pressure, so it is not easy to achieve plugging and unplugging.

[0067] In view of the above problems existing in the prior art, the present application provides a female connector, a male connector, a connector, a liquid cooling device, a battery pack and a vehicle. The female connector, the male connector and the connector provided by the present application include a first body, a first valve core and a first elastic member. By setting a first through cavity in the first body, the first through cavity is connected to a first external pipeline. By inserting the first valve core in the first through cavity, the first elastic member is set to be connected to the first valve core, so that the first valve core closes the first through cavity, so that it is in a closed state when not docked. By setting a first annular groove at the end of the first body, the first annular groove is set to communicate with the coolant flow channel on the male connector, and the end of the first body provided with the first annular groove is connected to the first annular groove through a connecting pipeline. Therefore, when separated from the male connector, the residual coolant at the end of the first body flows into the first annular groove through the connecting pipe, which can avoid or greatly reduce the leakage of coolant, thereby avoiding pollution of the on-site environment and improving the user experience.

[0068] The technical solution of the present application is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0069] First, please refer to Figure 1-Figure 4 As shown, an embodiment of the present application provides a female connector 100, including a first body 110, a first valve core 120 and a first elastic member 130. The first body 110 has a first through cavity 111 therein, the first through cavity 111 is used to connect a first external pipeline, the first valve core 120 is inserted in the first through cavity 111, and the first elastic member 130 is connected to the first valve core 120 so that the first valve core 120 closes the first through cavity 111.

[0070] A first annular groove 112 is provided at the end of the first body 110 . The first annular groove 112 is used to communicate with the coolant flow channel on the male connector 200 . The end of the first body 110 provided with the first annular groove 112 is communicated with the first annular groove 112 through a connecting pipeline.

[0071] The first body 110 in this embodiment can also be called a valve body, which is roughly a rotating body structure. A first through cavity 111 is opened in the first body 110. The first through cavity 111 is used to place the first valve core 120 and the first elastic member 130. The first through cavity 111 is also roughly a rotating body-shaped cavity structure, which is opened along the axial direction of the first body 110, that is, the first through cavity 111 is coaxial with the first body 110, and the two ends of the first through cavity 111 pass through the two ends of the first body 110. The first through cavity 111 is used to connect a first external pipeline, such as a pipeline on a battery pack or a liquid cooling system.

[0072] The first valve core 120 in this embodiment is used to open or close the first through cavity 111. It is generally a rotating body structure. The first valve core 120 is inserted in the first through cavity 111 and can move along the axis direction of the first through cavity 111, such as along Figure 1 Move in +X or -X direction.

[0073] The first elastic member 130 in this embodiment is used to elastically tighten the first valve core 120, and it can be a spring or other elastic member. One end of the first elastic member 130 is connected to the first valve core 120, and the other end is connected to the first body 110, so that the first valve core 120 closes the first through cavity 111 in the initial state.

[0074] A first annular groove 112 is provided at the end of the first body 110 . The first annular groove 112 is coaxial with the first body 110 , and the first annular groove 112 is connected to the coolant flow channel on the male connector 200 , so that part of the coolant in the coolant flow channel on the male connector 200 is also recovered into the first annular groove 112 .

[0075] Moreover, the end of the first body 110 provided with the first annular groove 112 is connected to the first annular groove 112 and can be connected through a connecting pipeline such as an internal channel or an external pipeline, so that the residual coolant accumulated inside the first annular groove 112 can be recovered into the first annular groove 112.

[0076] It should be noted that the end of the first body 110 provided with the first annular groove 112 here refers to the end of the first body 110 close to the center of the first annular groove 112. The inner and outer annular surfaces include an inner annular surface and an outer annular surface, the diameter of the inner annular surface is smaller than the diameter of the outer annular surface, and the inner annular surface and the outer annular surface correspond to the inner side surface and the outer side surface of the annular pressure head or the annular groove, respectively.

[0077] Specifically, one of the female connector 100 and the male connector 200 is connected to the battery pack through a pipeline, and the other is connected to the liquid cooling system through a pipeline. When the female connector 100 and the male connector 200 are docked, Figure 3 , Figure 4As shown, the first valve core 120 can be pressed against the second valve core 220 on the male connector 200 to overcome the elastic force of the first elastic member 130 and open the first through cavity 111 to allow coolant to be transported between the battery pack and the liquid cooling system.

[0078] When separating the female connector 100 and the male connector 200, as shown in FIG. Figure 4 , Figure 3 As shown, the first body 110 and the second body 210 are away from each other, and the first valve core 120 and the second valve core 220 on the male connector 200 are separated from each other. Under the action of the first elastic member 130, the first valve core 120 closes the first through cavity 111, cutting off the delivery of the coolant, so that part of the residual coolant at the end of the first body 110 and the coolant flow channel flows into the first annular groove 112 for recovery and storage.

[0079] It can be understood that when the female connector 100 in the embodiment of the present application is separated from the male connector 200, the residual coolant at the end of the first body 110 flows into the first annular groove 112 through the connecting pipe, which can avoid or greatly reduce the leakage of the coolant, thereby avoiding pollution of the on-site environment and improving the user experience.

[0080] Therefore, the female connector 100 provided in the embodiment of the present application includes a first body 110, a first valve core 120 and a first elastic member 130. A first through cavity 111 is provided in the first body 110, and the first through cavity 111 is connected to a first external pipeline. The first valve core 120 is inserted into the first through cavity 111, and a first elastic member 130 is provided to be connected to the first valve core 120, so that the first valve core 120 closes the first through cavity 111, so that it is in a closed state when not docked. A first annular groove 112 is provided at the end of the first body 110, and the first annular groove 112 is provided to communicate with the coolant flow channel on the male connector 200. The end of the first body 110 provided with the first annular groove 112 is communicated with the first annular groove 112 through a connecting pipeline. Therefore, when separated from the male connector, the residual coolant at the end of the first body 110 flows into the first annular groove 112 through the connecting pipeline, which can avoid or greatly reduce the leakage of coolant, thereby avoiding pollution of the on-site environment and improving the user experience.

[0081] In a possible design, a first annular pressing head 113 is further provided at the end of the first body 110 , and the first annular pressing head 113 is located inside the first annular groove 112 .

[0082] The first annular pressure head 113 is used to correspond to the second annular groove 213 on the male connector 200 , and the inner side of the first annular pressure head 113 is connected to the first annular groove 112 through a connecting pipeline.

[0083] When the female connector 100 and the male connector 200 are connected to each other, the first annular pressing head 113 is inserted into the first annular groove 112 .

[0084] When the female connector 100 and the male connector 200 are separated, the first annular pressure head 113 is removed from the first annular groove 112 , and the residual coolant inside the first annular pressure head 113 is sucked into the first annular groove 112 through the connecting pipeline.

[0085] Specifically, Figure 1 As shown, a first annular pressure head 113 is also provided at the end of the first body 110. The first annular pressure head 113 can be integrally formed with the first body 110 of the second joint. The first annular pressure head 113 is coaxial with the first body 110. The first annular pressure head 113 and the first annular groove 112 are located at the same side end of the first body 110, and the diameter of the first annular pressure head 113 is smaller than the diameter of the first annular groove 112.

[0086] The first annular pressure head 113 matches the inner annular surface of the second annular groove 213 on the male connector 200, and the first annular pressure head 113 does not form pressure when moving in the second annular groove 213. Moreover, the inner side of the first annular pressure head 113 is connected to the first annular groove 112 through a connecting pipeline, and the connecting pipeline can be an internal channel or an external pipeline.

[0087] When the female connector 100 and the male connector 200 are docked, the second annular pressing head 212 is first inserted into the first annular groove 112 , and then the first annular pressing head 113 is inserted into the second annular groove 213 .

[0088] When the female connector 100 and the male connector 200 are separated, the first annular pressure head 113 is first moved out of the second annular groove 213, and the second annular pressure head 212 is then moved out of the first annular groove 112, so that the residual coolant on the inner side of the first annular pressure head 113 is sucked into the first annular groove 112 through the connecting pipeline, and the residual coolant can be collected by the first annular pressure head 113 to further avoid overflow.

[0089] It should be noted that in order to ensure that the residual coolant does not flow out from the concave cavity inside the first annular pressure head 113, when the female connector 100 and the male connector 200 are docked or separated, the male connector 200 should be located at the top and the female connector 100 should be located at the bottom, so that the concave cavity inside the first annular pressure head 113 faces upward, thereby preventing the residual coolant from leaking out.

[0090] Furthermore, in this embodiment, the connecting pipeline is a first channel 114 disposed in the first body 110 , and the inner side of the first annular pressure head 113 is connected to the first annular groove 112 through the first channel 114 .

[0091] Specifically, Figure 1As shown, a first channel 114 is left in the first body 110, which is used to connect the first annular groove 112 and the end of the first body 110 provided with the first annular groove 112, and the structure is more compact.

[0092] It should be noted that the connection point between the first channel 114 and the first annular groove 112 should be as close as possible to the bottom of the first annular groove 112 to prevent the liquid in the first annular groove 112 from being fully discharged.

[0093] Furthermore, in this embodiment, the first channel 114 is communicated with the first through cavity 111 on the first body 110 close to the end of the first annular groove 112 .

[0094] That is, if Figure 1 As shown, the first channel 114 is connected to the flow gap between the first valve core 120 and the first through cavity 111. In this arrangement, when the coolant squeezes the first valve core 120, it is easy to form pressure on the second sealing surface 121 on the first valve core 120, which is conducive to the opening of the first valve core 120.

[0095] The specific shape and size of the first channel 114 can be determined according to actual needs and are not excessively limited in this embodiment.

[0096] In some embodiments, a piston ring assembly 140 and a second elastic member 150 are further included. The piston ring assembly 140 is movably disposed in the first ring groove 112 .

[0097] The piston ring assembly 140 and the first annular groove 112 enclose a liquid storage cavity, and the liquid storage cavity is connected to the end of the first body 110 provided with the first annular groove 112 through a connecting pipeline.

[0098] The second elastic member 150 is connected to the piston ring assembly 140 and is used to hold the piston ring assembly 140 toward the opening direction of the first ring groove 112 .

[0099] Specifically, Figure 1 As shown, the piston ring assembly 140 can ensure that a stable positive pressure or negative pressure is formed in the first ring groove 112. It matches the first ring groove 112 and encloses a liquid storage cavity. The liquid storage cavity is connected to the end of the first body 110 provided with the first ring groove 112 through a connecting pipeline. The piston ring assembly 140 can move in the first ring groove 112 along the axial direction of the first body 110, such as along Figure 1 Move in the +X or -X direction.

[0100] The second elastic member 150 is used to reset the piston ring assembly 140, which can be a spring or other elastic member. One end of the second elastic member 150 is connected to the piston ring assembly 140, and the other end is connected to the first body 110, and the piston ring assembly 140 is pressed against the opening direction of the first ring groove 112. Figure 1As shown in the +X direction, the liquid storage chamber is in the maximum volume state.

[0101] In this way, if Figure 3 As shown, when the second annular pressure head 212 moves out of the first annular groove 112, the second elastic member 150 resets the piston ring assembly 140, so that a stable negative pressure is formed in the liquid storage chamber to absorb the residual coolant.

[0102] Furthermore, in this embodiment, the piston ring assembly 140 includes a piston ring body 141 and a first sealing member 142 . The piston ring body 141 is disposed in the first ring groove 112 and moves along the opening direction of the first ring groove 112 .

[0103] The second elastic member 150 is inserted into the first ring groove 112 , one end of the second elastic member 150 abuts against the end of the piston ring body 141 , and the other end of the second elastic member 150 abuts against the bottom of the first ring groove 112 .

[0104] The first sealing member 142 is disposed on the piston ring body 141 and is sealingly connected to the inner and outer ring surfaces of the first ring groove 112 .

[0105] Specifically, the piston ring body 141 acts as a skeleton to reduce deformation, and the end of the second elastic member 150 abuts against the piston ring body 141. The first sealing member 142 may be an annular sealing ring, and the first sealing member 142 is disposed on both the inner and outer ring surfaces of the piston ring body 141 to seal the gap between the piston ring body 141 and the inner and outer ring surfaces of the first ring groove 112.

[0106] The specific structure, size, etc. of the piston ring body 141 and the first sealing member 142 may be determined according to actual needs and are not specifically limited in this embodiment.

[0107] Furthermore, in the present embodiment, a first positioning portion 1411 is provided on the piston ring body 141 , and the first positioning portion 1411 is used for positioning and connecting with the third positioning portion 2121 on the male connector 200 .

[0108] In one example, Figure 1 As shown, the first positioning portion 1411 is a first protruding groove. Figure 2 As shown, the third positioning portion 2121 is a first groove matching the first protrusion, and the first protrusion is positioned and connected with the first groove. In this way, it is convenient to quickly find the correct position when the second annular pressure head 212 and the piston ring body 141 are connected.

[0109] In another example, not shown in the figure, the first positioning portion 1411 may also be a first groove, and the third positioning portion 2121 may also be a first protrusion matching the first groove, and the first protrusion is positioned and connected to the first groove. In this way, it is also convenient to quickly find the correct position when the second annular pressure head 212 and the piston ring body 141 are connected.

[0110] The specific shapes, sizes, etc. of the first positioning portion 1411 and the third positioning portion 2121 can be determined according to actual needs and are not excessively restricted in this embodiment.

[0111] In some embodiments, a first sealing surface 115 is disposed on the first body 110 . The first sealing surface 115 is located on one side of the first through cavity 111 . The other side of the first through cavity 111 is used to connect to a first external pipeline.

[0112] The first valve core 120 has a second sealing surface 121 matching the first sealing surface 115 , and the first elastic member 130 makes the second sealing surface 121 abut against the first sealing surface 115 .

[0113] Specifically, Figure 1 As shown, a first sealing surface 115 is provided on the first body 110, which is located on one side of the first through cavity 111. The first sealing surface 115 can be a step surface, etc. The other side of the first through cavity 111 can be connected to the liquid cooling components in the battery pack or the liquid cooling system on the vehicle through a pipeline.

[0114] Moreover, a second sealing surface 121 is provided on the side of the first valve core 120 facing the first sealing surface 115, and the second sealing surface 121 matches the first sealing surface 115. When the first valve core 120 moves to make the second sealing surface 121 abut against the first sealing surface 115, the first through cavity 111 is closed; when the first valve core 120 moves to separate the second sealing surface 121 from the first sealing surface 115, the first through cavity 111 is opened.

[0115] In addition, one or more sealing members, such as sealing rings, sealing strips, etc., are provided on the first sealing surface 115 or the second sealing surface 121 to seal the gap between the first sealing surface 115 and the second sealing surface 121 to ensure good air tightness.

[0116] Furthermore, in this embodiment, a first stopper 116 is provided on the first body 110 , and the first stopper 116 is located in the first through cavity 111 . A second stopper 122 is provided on the first valve core 120 .

[0117] The first elastic member 130 is sleeved on the first valve core 120 , one end of the first elastic member 130 abuts against the first stopper 116 , and the other end of the first elastic member 130 abuts against the second stopper 122 .

[0118] Specifically, Figure 1 As shown, the first stop portion 116 is located on the inner wall of the first through cavity 111, which can be a first flange. The first stop portion 116 divides the first through cavity 111 into a first through cavity and a second through cavity. The first through cavity is between the first stop portion 116 and the first sealing surface 115. The second through cavity is used to connect the pipeline. The second stop portion 122 can be the first step on the peripheral side of the first valve core 120, which is located between the first stop portion 116 and the first sealing surface 115.

[0119] The first elastic member 130 is sleeved on the first valve core 120 , and its two ends are respectively in contact with the first stopper 116 and the second stopper 122 , so that the first valve core 120 is stably pressed and tightened for easy installation.

[0120] Furthermore, in this embodiment, a first opening cavity 123 and a first connecting hole 124 connected to the first opening cavity 123 are provided on the first valve core 120. The opening of the first opening cavity 123 faces the side away from the first sealing surface 115. The first connecting hole 124 is located between the first stop portion 116 and the first sealing surface 115.

[0121] Specifically, Figure 1 As shown, the first opening cavity 123 is a countersunk hole on the first valve core 120 that is away from the corresponding first sealing surface 115. It is opened along the axial direction of the first valve core 120. The first opening cavity 123 extends into the first through cavity and the second through cavity. The first communicating hole 124 is opened along the radial direction of the first valve core 120. The first communicating hole 124 is located between the first stop portion 116 and the first sealing surface 115.

[0122] In this way, the coolant in the second through cavity can flow into the first through cavity through the first opening cavity 123 and the first communicating hole 124, avoiding the interception effect of the first stopper 116. The specific size and position of the first opening cavity 123 and the first communicating hole 124 can be determined according to actual needs, and are not excessively limited in this embodiment.

[0123] In some embodiments, a second positioning portion 125 is provided on the first valve core 120 , and the second positioning portion 125 is used for positioning and connecting with a fourth positioning portion 225 on the male connector 200 .

[0124] In one example, Figure 1 As shown, the second positioning portion 125 is a second protrusion, such as Figure 2 As shown, the fourth positioning portion 225 is a second groove matching the second protrusion, and the second protrusion is positioned and connected to the second groove. In this way, it is convenient to quickly find the position when the first valve core 120 and the second valve core 220 on the male connector 200 are pressed against each other, and the first valve core 120 is prevented from deviating during movement.

[0125] In another example, not shown in the figure, the second positioning portion 125 may also be a second groove, and the fourth positioning portion 225 may also be a second protrusion matching the second groove, and the second protrusion is positioned and connected to the second groove. In this way, it is also convenient to quickly find the position when the first valve core 120 and the second valve core 220 on the male connector 200 are pressed against each other, and avoid the first valve core 120 from deviating during the movement process.

[0126] The specific shapes, sizes, etc. of the second positioning portion 125 and the fourth positioning portion 225 can be determined according to actual needs and are not excessively limited in this embodiment.

[0127] In some embodiments, a second sealing member 1131 is disposed on the inner annular surface of the first annular pressure head 113 , and the second sealing member 1131 is used for sealingly connecting with the inner and outer annular surfaces of the second annular groove 213 .

[0128] Specifically, Figure 1 As shown, one or more second sealing members 1131, such as sealing rings, sealing strips, etc., are provided on the inner ring surface of the first annular pressure head 113 to seal the gap between the first annular pressure head 113 and the inner side surface of the second annular groove 213 to ensure good air tightness.

[0129] The specific type and specification of the second sealing member 1131 may be determined according to actual needs and are not excessively restricted in this embodiment.

[0130] In some embodiments, when the female connector 100 and the male connector 200 are docked, the first valve core 120 is pressed against the male connector 200 to overcome the elastic force of the first elastic member 130 and open the first through cavity 111 .

[0131] When the female connector 100 and the male connector 200 are separated, the first valve core 120 is separated from the male connector 200. Under the action of the first elastic member 130, the first valve core 120 closes the first through cavity 111, and the residual coolant at the end of the first body 110 flows into the first annular groove 112 through the connecting pipeline.

[0132] Specifically, one of the female connector 100 and the male connector 200 is connected to the battery pack through a pipeline, and the other is connected to the liquid cooling system through a pipeline. When the female connector 100 and the male connector 200 are docked, Figure 3 , Figure 4 As shown, the first valve core 120 can be pressed against the second valve core 220 on the male connector 200 to overcome the elastic force of the first elastic member 130 and open the first through cavity 111 to allow coolant to be transported between the battery pack and the liquid cooling system.

[0133] When separating the female connector 100 and the male connector 200, as shown in FIG. Figure 4 , Figure 3As shown, the first body 110 and the second body 210 are away from each other, and the first valve core 120 and the second valve core 220 on the male connector 200 are separated from each other. Under the action of the first elastic member 130, the first valve core 120 closes the first through cavity 111 and cuts off the delivery of the coolant. The residual coolant at the end of the first body 110 flows into the first annular groove 112 through the connecting pipeline for recovery and storage.

[0134] On the second aspect, the embodiment of the present application also provides a male connector 200, including a second body 210, a second valve core 220 and a third elastic member 230. The second body 210 has a second through cavity 211, and the second through cavity 211 is used to connect a second external pipeline. The second valve core 220 is inserted in the second through cavity 211, and the third elastic member 230 is connected to the second valve core 220 so that the second valve core 220 closes the second through cavity 211.

[0135] A second annular pressing head 212 is provided at the end of the second body 210 , and the second annular pressing head 212 is suitable for communicating with the coolant flow channel on the female connector 100 .

[0136] The second body 210 in this embodiment can also be called a valve body, which is roughly a rotating body structure. A second through cavity 211 is opened in the second body 210. The second through cavity 211 is used to place the second valve core 220 and the third elastic member 230. The second through cavity 211 is also roughly a rotating body-shaped cavity structure, which is opened along the axial direction of the second body 210, that is, the second through cavity 211 is coaxial with the second body 210, and the two ends of the second through cavity 211 pass through the two ends of the second body 210. The second through cavity 211 is used to connect a second external pipeline, such as a pipeline on a battery pack or a liquid cooling system.

[0137] The second valve core 220 in this embodiment is used to open or close the second through cavity 211. It is generally a rotating body structure. The second valve core 220 is inserted in the second through cavity 211 and can move along the axis direction of the second through cavity 211, such as along Figure 2 Move in +X or -X direction.

[0138] The third elastic member 230 in this embodiment is used to elastically tighten the second valve core 220, and it can be a spring or other elastic member. One end of the third elastic member 230 is connected to the second valve core 220, and the other end is connected to the second body 210, so that the second valve core 220 closes the second through cavity 211 in the initial state.

[0139] A second annular pressure head 212 is provided at the end of the second body 210. The second annular pressure head 212 can be integrally formed with the second body 210 of the first connector. The second annular pressure head 212 is coaxial with the second body 210 of the first connector. The second annular pressure head 212 matches the first annular groove 112 at the end of the first body 110 in the female connector 100, ensuring that positive pressure or negative pressure can be formed when the second annular pressure head 212 moves in the first annular groove 112.

[0140] It can be understood that when the male connector 200 in the embodiment of the present application is used in conjunction with the above-mentioned female connector 100, when the two are separated from each other, the residual coolant at the ends of the first body 110 and the second body 210 flows into the first annular groove 112 through the connecting pipe, which can avoid or greatly reduce the leakage of the coolant, thereby avoiding pollution of the on-site environment and improving the user experience.

[0141] In some embodiments, a second annular groove 213 is further provided at the end of the second body 210 . The second annular groove 213 is located inside the second annular pressure head 212 . The second annular groove 213 corresponds to the first annular pressure head 113 on the female connector 100 .

[0142] Specifically, Figure 2 As shown, a second annular groove 213 is also provided at the end of the second body 210, and the second annular groove 213 is coaxial with the second body 210. The second annular groove 213 and the second annular pressure head 212 are located at the same side end of the second body 210, and the diameter of the second annular groove 213 is smaller than the diameter of the second annular pressure head 212, and the inner annular surface of the second annular groove 213 matches the first annular pressure head 113.

[0143] Furthermore, in this embodiment, a second channel 214 is provided in the second body 210 , and the second annular groove 213 is communicated with the outside through the second channel 214 .

[0144] Specifically, Figure 3 As shown, the second channel 214 is opened along the radial direction of the second body 210. When the first annular pressure head 113 is inserted into the second annular groove 213, the cavity in the second annular groove 213 gradually decreases, and this part of the air can be discharged through the second channel 214 without air inclusion interference.

[0145] When the first annular pressure head 113 moves out of the second annular groove 213 , the cavity in the second annular groove 213 gradually increases, and the outside air can be replenished through the second channel 214 , thereby reducing the separation resistance.

[0146] The specific shape and size of the second channel 214 can be determined according to actual needs and are not excessively limited in this embodiment.

[0147] Furthermore, in this embodiment, the outer annular surface of the second annular groove 213 is used to leave a preset gap L between it and the first annular pressing head 113 on the female connector 100 .

[0148] Specifically, Figure 4 As shown, when the first annular pressure head 113 is inserted into the second annular groove 213, the cavity between the second annular pressure head 212 and the first annular pressure head 113 is gradually reduced, and the air in this part can be discharged through the preset gap L and the second channel 214 without air inclusion interference.

[0149] When the first annular pressure head 113 moves out of the second annular groove 213, the cavity between the second annular pressure head 212 and the first annular pressure head 113 gradually increases, and the outside air can be filled in through the second channel 214 and the preset gap L, thereby reducing the separation resistance.

[0150] The specific size of the preset gap L can be determined according to actual needs and is not excessively limited in this embodiment.

[0151] In some embodiments, a third positioning portion 2121 is provided on the second annular pressure head 212 , and the third positioning portion 2121 is used for positioning and connecting with the first positioning portion 1411 on the female connector 100 .

[0152] The positioning connection between the third positioning portion 2121 and the first positioning portion 1411 facilitates rapid and accurate positioning of the second annular pressure head 212 and the piston ring body 141 when they are connected.

[0153] In some embodiments, a third sealing surface 215 is disposed on the second body 210 , and the third sealing surface 215 is located on one side of the second through cavity 211 , and the other side of the second through cavity 211 is used to connect to the second external pipeline.

[0154] The second valve core 220 has a fourth sealing surface 221 matching the third sealing surface 215 , and the third elastic member 230 makes the fourth sealing surface 221 abut against the third sealing surface 215 .

[0155] Specifically, Figure 2 As shown, a third sealing surface 215 is provided on the second body 210, which is located on one side of the second through cavity 211. The third sealing surface 215 can be a conical surface, etc. The other side of the second through cavity 211 can be connected to the liquid cooling components in the battery pack or the liquid cooling system on the vehicle through a pipeline.

[0156] Moreover, a fourth sealing surface 221 is provided on the side of the second valve core 220 facing the third sealing surface 215, and the fourth sealing surface 221 matches the third sealing surface 215. When the second valve core 220 moves to make the fourth sealing surface 221 abut against the third sealing surface 215, the second through cavity 211 is closed; when the second valve core 220 moves to separate the fourth sealing surface 221 from the third sealing surface 215, the second through cavity 211 is opened.

[0157] In addition, one or more sealing members, such as sealing rings, sealing strips, etc., are provided on the third sealing surface 215 or the fourth sealing surface 221 to seal the gap between the third sealing surface 215 and the fourth sealing surface 221 to ensure good air tightness.

[0158] Furthermore, in this embodiment, a third stopper 216 is provided on the second body 210 , and the third stopper 216 is located in the second through cavity 211 . A fourth stopper 222 is provided on the second valve core 220 .

[0159] The third elastic member 230 is sleeved on the second valve core 220 , one end of the third elastic member 230 abuts against the third stop portion 216 , and the other end of the third elastic member 230 abuts against the fourth stop portion 222 .

[0160] Specifically, Figure 2 As shown, the third stop portion 216 is located on the inner wall of the second through cavity 211, which can be a second flange. The third stop portion 216 divides the second through cavity 211 into a third through cavity and a fourth through cavity. The third through cavity is between the third stop portion 216 and the third sealing surface 215. The fourth through cavity is used to connect the pipeline. The fourth stop portion 222 can be a second step on the peripheral side of the second valve core 220, which is located between the third stop portion 216 and the third sealing surface 215.

[0161] The third elastic member 230 is sleeved on the second valve core 220 , and its two ends are respectively in contact with the third stopper 216 and the fourth stopper 222 , so that the second valve core 220 is stably pressed and tightened, which is convenient for installation.

[0162] Furthermore, in this embodiment, a second opening cavity 223 and a second connecting hole 224 connected to the second opening cavity 223 are provided on the second valve core 220, the opening of the second opening cavity 223 faces the side away from the third sealing surface 215, and the second connecting hole 224 is located between the third stop portion 216 and the third sealing surface 215.

[0163] Specifically, Figure 2As shown, the second opening cavity 223 is a countersunk hole on the second valve core 220 that is away from the corresponding third sealing surface 215. It is opened along the axial direction of the second valve core 220. The second opening cavity 223 extends into the third through cavity and the fourth through cavity. The second connecting hole 224 is opened along the radial direction of the second valve core 220. The second connecting hole 224 is located between the third stop portion 216 and the third sealing surface 215.

[0164] In this way, the coolant in the fourth through cavity can flow into the third through cavity through the second opening cavity 223 and the second connecting hole 224, avoiding the interception effect of the third stopper 216. The specific size and position of the second opening cavity 223 and the second connecting hole 224 can be determined according to actual needs, and are not excessively limited in this embodiment.

[0165] In some embodiments, a fourth positioning portion 225 is provided on the second valve core 220 , and the fourth positioning portion 225 is used for positioning and connecting with the second positioning portion 125 on the female connector 100 .

[0166] Among them, the positioning connection between the fourth positioning portion 225 and the second positioning portion 125 facilitates rapid positioning when the first valve core 120 and the second valve core 220 are pressed together, and avoids deviation during the relative movement of the first valve core 120 and the second valve core 220.

[0167] In some embodiments, a third seal 2122 is disposed on at least one of the inner ring surface and the outer ring surface of the second annular pressure head 212 , and the third seal 2122 is used for sealing connection with the inner ring surface and / or the outer ring surface of the first annular groove 112 .

[0168] Specifically, Figure 2 As shown, one or more third sealing members 2122, such as sealing rings, sealing strips, etc., are provided on the inner and outer annular surfaces of the second annular pressure head 212 to seal the gaps between the second annular pressure head 212 and the inner and outer sides of the first annular groove 112 to ensure good air tightness.

[0169] The specific type and specification of the third sealing member 2122 may be determined according to actual needs and are not excessively restricted in this embodiment.

[0170] In some embodiments, the second annular press head 212 is adapted to correspond to the first annular groove 112 on the female connector 100 .

[0171] Specifically, Figure 1 , Figure 2 As shown, the second annular pressure head 212 matches the inner and outer annular surfaces of the first annular groove 112 , that is, the second annular pressure head 212 can form a piston structure when inserted into the first annular groove 112 , ensuring that the second annular pressure head 212 can form positive pressure or negative pressure when moving in the first annular groove 112 .

[0172] When the female connector 100 and the male connector 200 are connected, Figure 3 , Figure 4 As shown, the second annular pressure head 212 is inserted into the first annular groove 112, and positive pressure is formed at this time, and the coolant or air stored in the first annular groove 112 is sent to the cavity enclosed by the second annular pressure head 212 and the second body 210. The coolant or air squeezes the first valve core 120 and the second valve core 220, and helps to overcome the residual back pressure on the first valve core 120 and the second valve core 220, thereby reducing the difficulty of opening the first valve core 120 and the second valve core 220.

[0173] When separating the female connector 100 and the male connector 200, as shown in FIG. Figure 4 , Figure 3 As shown, the second annular pressure head 212 is moved out from the first annular groove 112. Before the second annular pressure head 212 is moved out, negative pressure is formed in the first annular groove 112, so that the residual coolant at the end of the first body 110 is sucked into the first annular groove 112 for recovery and storage, providing recovery power and preventing the coolant from overflowing.

[0174] In a third aspect, an embodiment of the present application further provides a connector, comprising the female connector provided by any of the above embodiments and the male connector provided by any of the above embodiments.

[0175] It can be understood that the connector in the embodiment of the present application, through the cooperation between the female connector 100 and the male connector 200, can allow the residual coolant at the ends of the two connectors to flow into the first annular groove 112 through the connecting pipe when the two connectors are separated, thereby avoiding or greatly reducing the leakage of coolant, thereby avoiding pollution of the on-site environment and improving the user experience.

[0176] In a fourth aspect, an embodiment of the present application further provides a liquid cooling device, comprising a device body, on which is disposed a female connector or a male connector or a connector provided in any of the above embodiments.

[0177] The liquid cooling device provided in the embodiment of the present application, by configuring the female connector 100 or the male connector 200 or the connector, can allow the residual coolant at the ends of the first body 110 and the second body 210 to flow into the first annular groove 112 through the connecting pipeline when the female connector 100 is separated from the male connector 200, thereby avoiding or greatly reducing the leakage of the coolant, thereby avoiding pollution of the on-site environment and improving the user experience.

[0178] In a fifth aspect, an embodiment of the present application also provides a battery pack, comprising a battery pack body and a female connector or a male connector or a connector or a liquid cooling device provided in any of the above embodiments.

[0179] Specifically, one of the female connector 100 and the male connector 200 is connected to the liquid cooling component (such as a cold plate) inside the battery pack body through a pipeline, and the other is connected to the liquid cooling system pipeline on the vehicle. The quick plug-in and pull-out of the female connector 100 and the male connector 200 facilitates the rapid replacement of the battery pack, and the operation is simple and easy to use.

[0180] The battery pack provided in the embodiment of the present application, by configuring the female connector 100 or the male connector 200 or the connector or the liquid cooling device, can allow the residual coolant at the ends of the female connector 100 and the male connector 200 to flow into the first annular groove 112 through the connecting pipe when the female connector 100 is separated from the male connector 200, thereby avoiding or greatly reducing the leakage of the coolant, thereby avoiding pollution of the on-site environment and improving the user experience.

[0181] In a sixth aspect, an embodiment of the present application further provides a vehicle, including a vehicle body, on which a battery pack provided by any of the above embodiments is arranged. The vehicle may be a new energy vehicle, a hybrid vehicle, or the like.

[0182] It can be understood that the vehicle provided in the embodiment of the present application is equipped with the above-mentioned battery pack, which includes a female connector 100 or a male connector 200 or a connector or a liquid cooling device. When the female connector 100 is separated from the male connector 200, the residual coolant at the ends of the two connectors can flow into the first annular groove 112 through the connecting pipe, which can avoid or greatly reduce the leakage of the coolant, thereby avoiding pollution of the on-site environment and improving the user experience.

[0183] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the claims.

[0184] It should be understood that the present application is not limited to the precise structures described above and shown in the appended drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A female connector, characterized in that: The invention comprises a first body (110), a first valve core (120) and a first elastic member (130); the first body (110) has a first through cavity (111) therein; the first through cavity (111) is used to connect a first external pipeline; the first valve core (120) is inserted into the first through cavity (111); the first elastic member (130) is connected to the first valve core (120) so that the first valve core (120) closes the first through cavity (111); A first annular groove (112) is provided at the end of the first body (110), and the first annular groove (112) is used to communicate with a coolant flow channel on the male connector (200). The end of the first body (110) provided with the first annular groove (112) is connected to the first annular groove (112) via a connecting pipeline.

2. The female connector according to claim 1, characterized in that: A first annular pressure head (113) is also provided at the end of the first body (110), and the first annular pressure head (113) is located inside the first annular groove (112); The first annular pressure head (113) is used to correspond to the second annular groove (213) on the male connector (200), and the inner side of the first annular pressure head (113) is connected to the first annular groove (112) through the connecting pipeline; When the female connector (100) and the male connector (200) are butt-jointed, the first annular pressure head (113) is inserted into the first annular groove (130); When the female connector (100) and the male connector (200) are separated, the first annular pressure head (113) is removed from the first annular groove (130), and the residual coolant inside the first annular pressure head (113) is sucked into the first annular groove (112) through the connecting pipeline.

3. The female connector according to claim 2, characterized in that: The connecting pipeline is a first channel (114) arranged in the first body (110), and the inner side of the first annular pressure head (113) is connected to the first annular groove (112) through the first channel (114).

4. The female connector according to claim 3, characterized in that: The first channel (114) is in communication with the first through cavity (111) on the first body (110) close to an end of the first annular groove (112).

5. The female connector according to claim 1, characterized in that: It also includes a piston ring assembly (140) and a second elastic member (150), wherein the piston ring assembly (140) is movably disposed in the first ring groove (112); The piston ring assembly (140) and the first ring groove (112) enclose a liquid storage cavity, and the liquid storage cavity is connected to the end of the first body (110) provided with the first ring groove (112) through the connecting pipeline; The second elastic member (150) is connected to the piston ring assembly (140) and is used to hold the piston ring assembly (140) toward the opening direction of the first ring groove (112).

6. The female connector according to claim 5, characterized in that: The piston ring assembly (140) comprises a piston ring body (141) and a first sealing element (142); the piston ring body (141) is arranged in the first ring groove (112) and moves along the opening direction of the first ring groove (112); The second elastic member (150) is inserted into the first ring groove (112), one end of the second elastic member (150) abuts against the end of the piston ring body (141), and the other end of the second elastic member (150) abuts against the bottom of the first ring groove (112); The first sealing member (142) is arranged on the piston ring body (141) and is sealingly connected to the inner and outer ring surfaces of the first ring groove (112).

7. The female connector according to claim 6, characterized in that: The piston ring body (141) is provided with a first positioning portion (1411), and the first positioning portion (1411) is used for positioning and connecting with a third positioning portion (2121) on the male connector (200).

8. The female connector according to claim 1, characterized in that: A first sealing surface (115) is provided on the first body (110), the first sealing surface (115) is located on one side of the first through cavity (111), and the other side of the first through cavity (111) is used for connecting the first external pipeline; The first valve core (120) has a second sealing surface (121) matching the first sealing surface (115), and the first elastic member (130) causes the second sealing surface (121) to abut against the first sealing surface (115).

9. The female connector according to claim 8, characterized in that: A first stopper (116) is provided on the first body (110), the first stopper (116) is located in the first through cavity (111), and a second stopper (122) is provided on the first valve core (120); The first elastic member (130) is sleeved on the first valve core (120), one end of the first elastic member (130) abuts against the first stop portion (116), and the other end of the first elastic member (130) abuts against the second stop portion (122).

10. The female connector according to claim 9, characterized in that: The first valve core (120) is provided with a first opening cavity (123) and a first communicating hole (124) communicating with the first opening cavity (123); the opening of the first opening cavity (123) faces a side away from the first sealing surface (115); and the first communicating hole (124) is located between the first stop portion (116) and the first sealing surface (115).

11. The female connector according to any one of claims 1 to 10, characterized in that: A second positioning portion (125) is provided on the first valve core (120), and the second positioning portion (125) is used for positioning and connecting with a fourth positioning portion (225) on the male connector (200).

12. The female connector according to any one of claims 2 to 4, characterized in that: A second sealing member (1131) is provided on the inner annular surface of the first annular pressure head (113), and the second sealing member (1131) is used for sealingly connecting with the inner and outer annular surfaces of the second annular groove (213).

13. The female connector according to any one of claims 1 to 10, characterized in that: When the female connector (100) and the male connector (200) are connected, the first valve core (120) is pressed against the male connector (200) to overcome the elastic force of the first elastic member (130) and open the first through cavity (111); When the female connector (100) and the male connector (200) are separated, the first valve core (120) is separated from the male connector (200), and under the action of the first elastic member (130), the first valve core (120) closes the first through cavity (111), and the residual coolant at the end of the first body (110) flows into the first annular groove (112) through the connecting pipeline.

14. A male connector, characterized in that: The invention comprises a second body (210), a second valve core (220) and a third elastic member (230); the second body (210) has a second through cavity (211) therein; the second through cavity (211) is used to connect a second external pipeline; the second valve core (220) is inserted in the second through cavity (211); the third elastic member (230) is connected to the second valve core (220) so that the second valve core (220) closes the second through cavity (211); A second annular pressure head (212) is provided at the end of the second body (210), and the second annular pressure head (212) is suitable for communicating with a coolant flow channel on the female connector (100).

15. The male connector according to claim 14, characterized in that: A second annular groove (213) is also provided at the end of the second body (210), the second annular groove (213) being located inside the second annular pressure head (212), the second annular groove (213) corresponding to the first annular pressure head (113) on the female connector (100).

16. The male connector according to claim 15, characterized in that A second channel (214) is provided in the second body (210), and the second annular groove (213) is in communication with the outside through the second channel (214).

17. The male connector according to claim 15, characterized in that: The outer annular surface of the second annular groove (213) is used to leave a preset gap between the outer annular surface and the first annular pressure head (113) on the female connector (100).

18. The male connector according to claim 14, characterized in that The second annular pressure head (212) is provided with a third positioning portion (2121), and the third positioning portion (2121) is used for positioning and connecting with the first positioning portion (1411) on the female connector (100).

19. The male connector according to claim 14, characterized in that A third sealing surface (215) is provided on the second body (210), the third sealing surface (215) is located on one side of the second through cavity (211), and the other side of the second through cavity (211) is used for connecting the second external pipeline; The second valve core (220) has a fourth sealing surface (221) matching the third sealing surface (215), and the third elastic member (230) causes the fourth sealing surface (221) to abut against the third sealing surface (215).

20. The male connector according to claim 19, characterized in that A third stopper (216) is provided on the second body (210), and the third stopper (216) is located in the second through cavity (211); and a fourth stopper (222) is provided on the second valve core (220); The third elastic member (230) is sleeved on the second valve core (220), one end of the third elastic member (230) abuts against the third stop portion (216), and the other end of the third elastic member (230) abuts against the fourth stop portion (222).

21. The male connector according to claim 20, characterized in that The second valve core (220) is provided with a second opening cavity (223) and a second connecting hole (224) connected to the second opening cavity (223); the opening of the second opening cavity (223) faces a side away from the third sealing surface (215); and the second connecting hole (224) is located between the third stop portion (216) and the third sealing surface (215).

22. The male connector according to any one of claims 14 to 21, characterized in that: The second valve core (220) is provided with a fourth positioning portion (225), and the fourth positioning portion (225) is used to be positioned and connected with the second positioning portion (125) on the female connector (100).

23. The male connector according to any one of claims 14 to 21, characterized in that: A third sealing member (2122) is provided on at least one of the inner ring surface and the outer ring surface of the second annular pressure head (212), and the third sealing member (2122) is used for sealingly connecting with the inner ring surface and / or the outer ring surface of the first annular groove (112).

24. The male connector according to any one of claims 14 to 21, characterized in that: The second annular pressure head (212) corresponds to the first annular groove (112) on the female connector according to any one of claims 1 to 13.

25. A connector, characterized in that: It comprises the female connector according to any one of claims 1 to 13 and the male connector according to any one of claims 14 to 24.

26. A liquid cooling device, characterized in that: It comprises a device body, on which the female connector according to any one of claims 1 to 13 is arranged; Alternatively, the device body is provided with a male connector as claimed in any one of claims 14 to 24; Alternatively, the device body is provided with a connector as described in claim 25.

27. A battery pack, characterized in that: A battery pack body is provided with a female connector as claimed in any one of claims 1 to 13; Alternatively, the battery pack body is provided with a male connector as claimed in any one of claims 14 to 24; Alternatively, the battery pack body is provided with a connector as claimed in claim 25; Alternatively, the battery pack body is provided with a liquid cooling device as described in claim 26.

28. A vehicle, characterized in that: It includes a vehicle body, on which the battery pack as claimed in claim 27 is arranged.

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