Connector assembly, cooling device, battery pack and electric equipment

Abstract

The invention belongs to the technical field of battery packs, and provides a connector assembly, a cooling device, a battery pack and electric equipment. The connector assembly comprises a cooling connector and a valve element, the cooling connector is internally provided with a connector channel, the connector channel is provided with a first end and a second end which are opposite, the first end is used for being communicated with the cold plate, and the second end is used for being communicated with a liquid supply device. The valve element is located in the connector channel and used for opening or blocking the connector channel. According to the connector assembly provided by the invention, the cooling liquid in the cooling device can be prevented from being sprayed out.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a connector assembly, a cooling device, a battery pack and an electrical device. Background Art

[0002] The battery pack is used to supply power to electrical equipment. The battery pack includes multiple battery cell modules. The battery cell modules generate heat when working. A cold plate can be set in the battery pack to take away the heat generated by the battery cell modules when working.

[0003] A flow channel is provided in the cold plate, and the flow channel includes a liquid inlet, a circulation pipeline and a liquid outlet which are connected in sequence. The coolant enters the circulation pipeline from the liquid inlet. As the coolant flows in the circulation pipeline, it can take away the heat of the battery cell module, and then the overheated coolant flows out from the liquid outlet. The coolant in the cold plate is provided by a liquid supply device. When the battery pack needs to be maintained, the cold plate needs to be removed from the battery pack or the battery pack needs to be removed from the electrical equipment. The connection between the cold plate and the liquid supply device needs to be disconnected. At this time, the coolant in the cold plate will spray out from the liquid inlet or the liquid outlet, affecting maintenance. Summary of the invention

[0004] The present application provides a connector assembly, a cooling device, a battery pack and an electrical device, which can prevent the coolant in the cooling device from spraying out.

[0005] The present application provides a joint assembly for connecting a cold plate and a liquid supply device, the joint assembly comprising: a cooling joint and a valve core, the cooling joint having a joint channel, the joint channel having a first end and a second end opposite to each other, the first end being used to connect with the cold plate, and the second end being used to connect with the liquid supply device; the valve core is located in the joint channel, and the valve core is used to open or block the joint channel.

[0006] In a possible embodiment, the connector assembly provided in the present application has a valve port in the connector channel, the valve port connects the first end and the second end, and the valve core is movably arranged in the connector channel to open or close the valve port, so that the connector channel is conductive or blocked.

[0007] In a possible embodiment, the connector assembly provided by the present application has a first limiting portion and a second limiting portion arranged at intervals inside the connector channel, the first limiting portion is arranged close to the first end, the second limiting portion is arranged away from the first end, and the second limiting portion has a valve port; the valve core is located between the first limiting portion and the second limiting portion, the valve core includes a blocking portion and an elastic member, the blocking portion faces the second limiting portion, one end of the elastic member abuts against the first limiting portion, and the other end abuts against the blocking portion, so that the blocking portion abuts against the second limiting portion to block the valve port.

[0008] In a possible implementation manner, in the joint assembly provided in the present application, a first sealing ring is provided on a side of the sealing portion facing the second limiting portion.

[0009] In a possible implementation, in the joint assembly provided in the present application, an annular protrusion is formed on the inner wall of the joint channel, and the second limiting portion is configured as the annular protrusion.

[0010] In a possible embodiment, in the joint assembly provided in the present application, the first limiting portion includes a limiting member, the limiting member includes a connected connecting plate and an abutment plate, the connecting plate has a first connecting hole, the first connecting hole is used to connect the joint channel and the cold plate, and the elastic member abuts against the abutment plate.

[0011] In a possible implementation, in the joint assembly provided in the present application, the connecting plate is threadedly connected to the inner wall of the joint channel.

[0012] In a possible embodiment, in the joint assembly provided in the present application, the limit member also includes an intermediate connecting portion, and along the extension direction of the joint channel, the connecting plate, the intermediate connecting portion and the abutment plate are connected in sequence, and the diameter of the intermediate connecting portion is smaller than the diameter of the abutment plate.

[0013] In a possible embodiment, the joint assembly provided in the present application has a guide hole on the limit member, and the valve core also includes a guide rod, which is connected to the side of the sealing part away from the second limit member, the elastic member is sleeved on the circumferential side of the guide rod, and the end of the guide rod away from the sealing part is inserted in the guide hole.

[0014] In a possible embodiment, the connector assembly provided in the present application further includes a lead-out connector, which is used to connect to a liquid supply device; when the lead-out connector is inserted at the second end, the lead-out connector is used to push open the valve core so that the lead-out connector, the connector channel and the cold plate are connected in sequence; when the lead-out connector is pulled out from the second end, the valve core is used to seal the valve port.

[0015] In a possible embodiment, the connector assembly provided in the present application is provided with a mounting wall on one end of the lead-out connector facing the connector channel, the lead-out connector includes a protrusion, the protrusion protrudes from the mounting wall toward the connector channel, and a second connecting hole is provided on the mounting wall; when the protrusion pushes open the valve core, the lead-out connector and the connector channel are connected via the second connecting hole.

[0016] In a possible embodiment, the joint assembly provided by the present application, the joint channel includes a first joint channel and a second joint channel, the second end of the first joint channel has an inner diameter different from the second end of the second joint channel; the lead-out joint includes a first lead-out joint and a second lead-out joint, the outer diameter of the first lead-out joint matches the inner diameter of the second end of the first joint channel and is inserted in the second end of the first joint channel, and the outer diameter of the second lead-out joint matches the inner diameter of the second end of the second joint channel and is inserted in the second end of the second joint channel.

[0017] In a possible embodiment, the connector assembly provided in the present application, the lead-out connector also includes a connector body, the first lead-out connector and the second lead-out connector are both connected to the connector body, and the connector body is detachably connected to the cooling connector on a side facing the connector body.

[0018] In a possible implementation, the joint assembly provided in the present application has a second sealing ring between the cooling joint and the joint body at the first joint channel; and has a third sealing ring between the cooling joint and the joint body at the second joint channel.

[0019] The present application also provides a cooling device, including a cold plate and the above-mentioned joint assembly, wherein the cold plate includes a circulation pipeline, and the first end of the joint channel is connected to the circulation pipeline.

[0020] In a possible embodiment, the cooling device provided in the present application further includes a transfer member, in which a transfer pipe is arranged, the transfer pipe has a third end and a fourth end opposite to each other, the third end of the transfer pipe is connected to the first end, and the fourth end of the transfer pipe is connected to the circulation pipeline.

[0021] In a possible embodiment, the cooling device provided in the present application, the transfer pipe includes a first transfer pipe and a second transfer pipe, the first transfer pipe has a first interface, the second transfer pipe has a second interface, the joint channel includes a first joint channel and a second joint channel, the first interface is connected to the first joint channel, and the second interface is connected to the second joint channel.

[0022] In a possible implementation, in the cooling device provided by the present application, the second transfer pipeline includes a transfer branch, the circulation pipeline includes a circulation branch, and the transfer branch is connected to the circulation branch in a one-to-one correspondence.

[0023] In a possible implementation manner, the cooling device provided in the present application has a fourth sealing ring between the adapter and the cooling joint.

[0024] In a possible embodiment, the cooling device provided in the present application has a first mounting groove on one of the adapter and the cooling joint, the fourth sealing ring is located in the first mounting groove, and the fourth sealing ring is provided with a first clamping portion at intervals, and the first clamping portion abuts against the groove wall of the first mounting groove.

[0025] The present application also provides a battery pack, including a box body, a battery cell module and the above-mentioned cooling device, the box body includes a bottom plate and side beams, the bottom plate and the side beams are arranged to form a accommodating cavity, the battery cell module is located in the accommodating cavity, and the cold plate of the cooling device is connected to the battery cell module.

[0026] In a possible embodiment, the battery pack provided in the present application, the cooling device also includes an adapter, the cold plate, the adapter and the cooling connector are connected in sequence; the adapter is located on the side of the side beam facing the inside of the accommodating cavity and is connected to the side beam, and the cooling connector is connected to the side beam; the side beam has a through hole that penetrates the side beam along the thickness direction of the side beam, and the cooling connector is partially inserted in the through hole to be connected with the adapter.

[0027] In a possible embodiment, the battery pack provided by the present application, the adapter includes a first adapter portion and a second adapter portion, the first adapter portion is connected to the cold plate and extends from the cold plate along a first direction, the second adapter portion is connected to the first adapter portion and extends along a second direction, the second direction is the thickness direction of the side beam, and the second direction has an angle with the first direction.

[0028] In a possible implementation, the battery pack provided in the present application has a fifth sealing ring between the cooling connector and the side of the side beam facing the outside of the accommodating cavity.

[0029] In a possible embodiment, the battery pack provided in the present application has a second mounting groove provided on one side of the side beam facing the outside of the accommodating cavity and one of the cooling joints, the fifth sealing ring is located in the second mounting groove, and a second clamping portion is spaced apart on the fifth sealing ring, and the second clamping portion abuts against the groove wall of the second mounting groove.

[0030] The present application also provides an electrical device, including a liquid supply device and the above-mentioned battery pack, wherein the liquid supply device is used to provide cooling liquid to a cooling device of the battery pack.

[0031] The joint assembly provided by the present application is provided with a cooling joint and a valve core. The cooling joint has a joint channel. The joint channel has a first end and a second end opposite to each other. The first end is used to communicate with the cold plate, and the second end is used to communicate with the liquid supply device. The valve core is located in the joint channel. When it is necessary to provide coolant to the cooling device, the valve core can be opened to make the joint channel conductive, and the coolant in the liquid supply device can enter the cold plate through the joint channel. When the battery pack needs to be maintained, the liquid supply device is disconnected from the cooling joint, and the valve core can be closed to block the joint channel, thereby preventing the coolant in the cold plate from spraying out of the joint channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

[0033] Figure 1 A schematic diagram of the battery pack structure provided in an embodiment of the present application;

[0034] Figure 2 An exploded schematic diagram of a battery pack provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the structure of a cooling device provided in an embodiment of the present application;

[0036] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0037] Figure 5 for Figure 4 Explosion diagram of

[0038] Figure 6 A schematic diagram of a state of a connector assembly provided in an embodiment of the present application;

[0039] Figure 7 A schematic diagram of another state of the connector assembly provided in an embodiment of the present application;

[0040] Figure 8 An exploded schematic diagram of a connector assembly provided in an embodiment of the present application;

[0041] Fig. 9 A schematic structural diagram of a first limiting portion in a connector assembly provided in an embodiment of the present application;

[0042] Fig.10 A schematic diagram of the structure of a cooling joint in a joint assembly provided in an embodiment of the present application;

[0043] Fig.11 A schematic diagram of the structure of a lead-out connector in a connector assembly provided in an embodiment of the present application;

[0044] Fig.12 Another exploded schematic diagram of the cooling device provided in the embodiment of the present application;

[0045] Fig.13 A schematic diagram of the structure of a transition piece in a cooling device provided in an embodiment of the present application;

[0046] Fig.14 A schematic diagram of the assembly process of a battery pack provided in an embodiment of the present application;

[0047] Fig.15 A schematic diagram of the structure of a crossbeam in a battery pack provided in an embodiment of the present application;

[0048] Fig.16 A schematic diagram of another structure of a crossbeam in a battery pack provided in an embodiment of the present application;

[0049] Fig.17 Another exploded schematic diagram of a cooling device provided in an embodiment of the present application;

[0050] Fig.18 A schematic diagram of the structure of the fifth sealing ring in the cooling device provided in an embodiment of the present application;

[0051] Fig.19 A schematic diagram of another assembly process of a battery pack provided in an embodiment of the present application.

[0052] Description of reference numerals:

[0053] 10-Battery pack;

[0054] 110- cooling device;

[0055] 111-first interface; 112-second interface; 113-cold plate; 1131-circulation pipeline; 1131a-circulation branch; 114-adapter; 1141-fourth sealing ring; 1141a-first clamping part; 1142-first mounting groove; 1143-second mounting part; 1143a-fourth mounting hole; 1144-first adapter part; 1145-second adapter part; 115-adapter pipeline; 115a-first adapter pipeline; 115b-second adapter pipeline; 1151-third end; 1152-fourth end; 1153-adapter branch;

[0056] 100-connector assembly;

[0057] 120-cooling joint;

[0058] 121-joint channel; 121a-first joint channel; 121b-second joint channel; 1211-valve port; 1212-first end; 1213-second end; 1214-first position limiting portion; 1214a-first connecting hole; 1214b-guide hole; 1214c-connecting plate; 1214d-abutting plate; 1214e-middle connecting portion; 1215-second position limiting portion;

[0059] 122- elastic member;

[0060] 123- second mounting hole;

[0061] 124- fourth mounting portion; 1241- sixth mounting hole;

[0062] 130-valve core; 131-blocking portion; 132-guide rod; 133-first sealing ring;

[0063] 140-lead-out connector; 141-protrusion; 142-mounting wall; 1421-second connecting hole; 143-first lead-out connector; 144-second lead-out connector; 145-connector body; 1451-first mounting hole; 146-second sealing ring; 147-third sealing ring;

[0064] 200-cabinet;

[0065] 210- bottom plate;

[0066] 220-side beam; 221-through hole; 222-first surface; 2221-first mounting portion; 2221a-third mounting hole; 223-second surface; 2231-third mounting portion; 2231a-fifth mounting hole; 224-fifth sealing ring; 2241-second clamping portion; 225-second mounting groove;

[0067] 230-accommodation chamber;

[0068] L-length direction; W-width direction; D-thickness direction;

[0069] X-first direction; Y-second direction. DETAILED DESCRIPTION

[0070] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0071] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0072] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0073] The terms "first", "second", "third" (if any) in the specification and claims of this 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 numbers used in this way can be interchanged where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0074] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or service tool that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or service tool.

[0075] The battery pack is used to supply power to electrical equipment. The battery pack includes multiple battery cell modules. The battery cell modules generate heat when working. A cold plate can be set in the battery pack to take away the heat generated by the battery cell modules when working.

[0076] The battery cell module has an area to be cooled, and a flow channel is provided in the cold plate. The flow channel includes a liquid inlet, a circulation pipeline and a liquid outlet connected in sequence. The circulation pipeline can be arranged in an S shape or other shapes that bend back and forth to cover the area to be cooled of the battery cell module. The coolant enters the circulation pipeline from the liquid inlet. As the coolant flows in the circulation pipeline, it can take away the heat from the area to be cooled, and then the overheated coolant flows out from the liquid outlet. The coolant in the cold plate is provided by a liquid supply device. When the battery pack needs to be maintained, the cold plate needs to be removed from the battery pack or the battery pack needs to be removed from the electrical equipment. At this time, the coolant in the flow channel of the cold plate can be discharged first, and then the connection between the cold plate and the liquid supply device can be disconnected. However, the coolant in the flow channel of the cold plate cannot be completely drained, and there is coolant remaining in the flow channel. When the liquid supply device is disconnected, the residual coolant will flow out of the flow channel.

[0077] The coolant flowing out of the flow channel will spray onto the battery module or other parts of the vehicle, and the coolant may cause a short circuit in the battery module or damage other parts of the vehicle.

[0078] Based on this, the embodiments of the present application provide a connector assembly, a cooling device, a battery pack and an electrical device, which can prevent the coolant in the cooling device from spraying out.

[0079] Figure 1 A schematic diagram of the battery pack structure provided in an embodiment of the present application, Figure 2 An exploded schematic diagram of a battery pack provided in an embodiment of the present application.

[0080] See also Figure 1 and Figure 2As shown, the battery pack 10 includes a cooling device 110, a box body 200 and a battery cell module (not shown in the figure), the box body 200 includes a bottom plate 210 and a side beam 220, the bottom plate 210 and the side beam 220 are arranged to form a receiving cavity 230, and the battery cell module is located in the receiving cavity 230.

[0081] Specifically, the box 200 is used to carry the battery module. The box 200 may be a rectangular parallelepiped structure, and the box 200 has a length direction L, a width direction W, and a thickness direction D. Among them, the bottom plate 210 may be a quadrilateral, and the side beam 220 is connected to the peripheral side of the bottom plate 210 to form a receiving cavity 230, and the battery module may be arranged in the receiving cavity 230. The battery module generates heat when working, and the cooling device 110 may be used to dissipate the heat of the battery module.

[0082] Figure 3 A schematic diagram of the structure of a cooling device provided in an embodiment of the present application, Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0083] See also Figure 3 and Figure 4 As shown, the cooling device 110 includes a cold plate 113 and a joint assembly 100. The cold plate 113 covers the battery cell module. The joint assembly 100 is used to connect the cold plate 113 and the liquid supply device. The coolant circulates between the liquid supply device and the cold plate 113 to take away the heat generated when the battery cell module is working.

[0084] Next, the structure of the joint assembly 100 will be described. Figure 5 for Figure 4 Schematic diagram of the explosion, Figure 6 A schematic diagram of a state of a connector assembly provided in an embodiment of the present application, Figure 7 A schematic diagram of another state of the connector assembly provided in an embodiment of the present application.

[0085] See also Figures 3 to 7 As shown, the joint assembly 100 includes a cooling joint 120 and a valve core 130. The cooling joint 120 has a joint channel 121. The joint channel 121 has a first end 1212 and a second end 1213 opposite to each other. The first end 1212 is connected to the cold plate 113, and the second end 1213 is used to communicate with the liquid supply device. The valve core 130 is located in the joint channel 121, and the valve core 130 is used to conduct or block the joint channel 121.

[0086] The cold plate 113 can cover the battery module, please continue to refer to Figures 5 to 7As shown, the cooling joint 120 has a joint channel 121 for coolant flow, the cold plate 113 includes a circulation pipeline 1131, the end of the joint channel 121 facing the cold plate 113 and connected to the circulation pipeline 1131 in the cold plate 113 is a first end 1212, and the end of the joint channel 121 facing the liquid supply device is a second end 1213. The external liquid supply device is used to provide coolant to the cold plate 113 through the joint assembly 100.

[0087] The coolant in the liquid supply device can flow into the joint channel 121 from the second end 1213 of the joint channel 121, and the coolant in the liquid supply device flows into the cold plate 113 via the cooling joint 120, takes away the heat of the battery cell module and then returns to the liquid supply device from the cooling joint 120, and after being cooled in the liquid supply device, flows into the cold plate 113 via the cooling joint 120 again, and repeats this cycle to dissipate heat from the battery cell module.

[0088] Please continue to see Figure 6 and Figure 7 As shown, a valve core 130 is provided in the joint channel 121, and the valve core 130 may be a solenoid valve or a mechanical valve. When the battery pack needs to be maintained, the liquid supply device needs to be disconnected from the cooling joint 120. At this time, the valve core 130 can be closed to block the joint channel 121, thereby preventing the coolant in the cold plate 113 from spraying out of the joint channel 121.

[0089] Please continue to see Figure 7 As shown, when it is necessary to provide cooling liquid to the cooling device, the valve core 130 can be opened to make the joint channel 121 conductive, and the cooling liquid in the liquid supply device can enter the cold plate 113 through the joint channel 121.

[0090] Please continue to see Figure 6 and Figure 7 As shown, the joint channel 121 has a valve port 1211, which connects the first end 1212 and the second end 1213. The valve core 130 is movably arranged in the joint channel 121 to open or close the valve port 1211, so that the joint channel 121 is conductive or blocked.

[0091] The valve port 1211 is an opening provided in the joint passage 121, and the opening communicates with the first end 1212 and the second end 1213. The valve core 130 can move toward the valve port 1211 along the extension direction of the joint passage 121. When the valve core 130 moves to contact the valve port 1211, the valve core 130 closes the valve port 1211 so that the joint passage 121 is blocked.

[0092] The valve core 130 can move away from the valve port 1211 along the extension direction of the joint channel 121. For example, the liquid supply device can extend into the joint channel 121 from the second end 1213 to push open the valve core 130, so that the valve core 130 is open relative to the valve port 1211, thereby making the joint channel 121 conductive.

[0093] By setting a valve port 1211 in the joint channel 121 and allowing the valve core 130 to move in the joint channel 121 to open or close the valve port 1211, the joint channel 121 can be opened or blocked, which is less costly than setting a solenoid valve or a mechanical valve in the joint channel 121.

[0094] Next, the process of the valve core 130 blocking the valve port 1211 is described.

[0095] Please continue to see Figure 6 and Figure 7 As shown, the interior of the joint channel 121 is provided with a first limiting portion 1214 and a second limiting portion 1215 which are arranged at intervals, the first limiting portion 1214 is arranged close to the first end 1212, the second limiting portion 1215 is arranged away from the first end 1212, and the second limiting portion 1215 has a valve port 1211; the valve core 130 is located between the first limiting portion 1214 and the second limiting portion 1215, the valve core 130 includes a blocking portion 131 and an elastic member 122, the blocking portion 131 faces the second limiting portion 1215, one end of the elastic member 122 abuts against the first limiting portion 1214, and the other end abuts against the blocking portion 131, so that the blocking portion 131 abuts against the second limiting portion 1215 to block the valve port 1211.

[0096] The valve core 130 includes a guide rod 132 and a blocking portion 131 connected to the guide rod 132 . The projection area of ​​the blocking portion 131 on the second position limiting portion 1215 is larger than the projection area of ​​the valve port 1211 on the second position limiting portion 1215 .

[0097] The valve core 130 further includes an elastic member 122, which may be a coil spring or an elastic sleeve. Figure 6 and Figure 7 In the illustrated embodiment, the elastic member 122 is a coil spring, and the elastic member 122 is sleeved on the guide rod 132. One end of the elastic force direction of the elastic member 122 abuts against the blocking portion 131, and the other end abuts against the first limiting portion 1214. The elastic member 122 is in a compressed state, and under the action of the elastic force of the elastic member 122, the blocking portion 131 can abut against the second limiting portion 1215 and exert pressure on the second limiting portion 1215, thereby, the blocking portion 131 can block the valve port 1211 provided on the second limiting portion 1215, thereby preventing the coolant from being sprayed out from the joint channel 121.

[0098] Figure 8 An exploded schematic diagram of a joint assembly provided in an embodiment of the present application.

[0099] See also Figure 8 As shown, a first sealing ring 133 is disposed on one side of the blocking portion 131 facing the second limiting portion 1215 .

[0100] The first sealing ring 133 can be set on the sealing part 131 of the valve core 130 by injection molding. When the sealing part 131 blocks the valve port 1211, the second limiting part 1215 and the sealing part 131 will compress the first sealing ring 133, thereby, the first sealing ring 133 can seal the gap between the second limiting part 1215 and the sealing part 131.

[0101] In a possible embodiment, the inner wall of the joint channel 121 is formed with an annular protrusion, and the second limiting portion 1215 is configured as an annular protrusion. The annular protrusion can be formed by extending from the inner wall of the joint channel 121 toward the axis of the joint channel 121. That is to say, the second limiting portion 1215 is integrally formed with the joint channel 121, the second limiting portion 1215 is reliably connected to the inner wall of the joint channel 121, and there is no gap between the second limiting portion 1215 and the inner wall of the joint channel 121, which can avoid the problem of liquid leakage after the valve core 130 blocks the valve port 1211.

[0102] Next, the structure of the first limiting portion 1214 is described.

[0103] Fig. 9 A schematic diagram of the structure of a first limiting portion in a cooling device provided in an embodiment of the present application; Fig.10 A schematic structural diagram of a cooling joint in a joint assembly provided in an embodiment of the present application.

[0104] See also Fig. 9 and Fig.10 As shown, the first limiting portion 1214 includes a limiting member, which includes a connected connecting plate 1214c and an abutting plate 1214d. The connecting plate 1214c has a first connecting hole 1214a, which is used to connect the joint channel 121 and the cold plate 113, and the elastic member 122 abuts against the abutting plate 1214d.

[0105] The connecting plate 1214c is arranged on one side of the first end 1212 near the joint channel 121, and a plurality of first connecting holes 1214a can be arranged on the connecting plate 1214c, that is, the connecting plate 1214c is a hollow structure. The coolant in the joint channel 121 can enter the cold plate 113 through the first connecting hole 1214a at the first end 1212, and the coolant in the cold plate 113 can also enter the joint channel 121 through the first connecting hole 1214a. In other words, the first end 1212 of the joint channel 121 and the cold plate 113 are always in a connected state through the connecting plate 121c. The abutting plate 1214d is connected to the connecting plate 1214c, and the abutting plate 1214d faces the second limiting portion 1215, and the elastic member 122 abuts between the abutting plate 1214d and the blocking portion 131, thereby preventing the connecting plate 1214c of the hollow structure from contacting the elastic member 122, so that the force on the elastic member 122 is uneven.

[0106] Please continue to see Fig. 9 and Fig.10 As shown, the connecting plate 1214c is threadedly connected to the inner wall of the joint channel 121.

[0107] Please continue to see Figures 8 to 10 As shown, when assembling the cooling joint 120 and the valve core 130, the sealing portion 131 of the valve core 130 can be first inserted into the joint channel 121 toward the second limiting portion 1215, and the elastic member 122 can be sleeved on the guide rod 132; then the limiting member is inserted into the joint channel 121 from the first end 1212, the inner wall of the joint channel 121 has an internal thread, the connecting plate 1214c has an external thread, and the first limiting portion 1214 is threadedly connected to the inner wall of the joint channel 121, which can facilitate the assembly and disassembly of the joint assembly 100.

[0108] Please continue to see Fig. 9 As shown, the limiter also includes an intermediate connecting portion 1214e. Along the extension direction of the joint channel 121, the connecting plate 1214c, the intermediate connecting portion 1214e and the abutting plate 1214d are connected in sequence, and the diameter of the intermediate connecting portion 1214e is smaller than the diameter of the abutting plate 1214d.

[0109] In order to facilitate the abutment with the elastic member 122, the projection area of ​​the abutment plate 1214d on the connecting plate 1214c is larger. In order to prevent the abutment plate 1214d from affecting the flow of liquid, an intermediate connecting portion 1214e can be set between the connecting plate 1214d and the abutment plate 1214d. The intermediate connecting portion 1214e extends along the extension direction of the joint channel 121. The abutment plate 1214d and the connecting plate 1214c can be spaced apart to facilitate the liquid to pass through the first connecting hole 1214a. The diameter of the intermediate connecting portion 1214e is smaller than the diameter of the abutment plate 1214d, so that the projection of the intermediate connecting portion 1214e on the connecting plate 1214c can be smaller than the projection of the abutment plate 1214d on the connecting plate 1214c. Therefore, the aperture of the first connecting hole 1214a can be set larger, which is conducive to reducing the resistance to liquid flow.

[0110] Please continue to see Fig. 9 As shown, the limit member has a guide hole 1214b, and the valve core 130 also includes a guide rod 132, which is connected to the side of the sealing portion 131 away from the second limit portion 1215, the elastic member 122 is sleeved on the peripheral side of the guide rod 132, and the end of the guide rod 132 away from the sealing portion 131 is inserted into the guide hole 1214b.

[0111] The guide hole 1214b can be set on the axis of the limit member, and the aperture of the guide hole 1214b can be slightly larger than the diameter of the guide rod 132. The guide rod 132 is inserted into the guide hole 1214b. Therefore, when the valve core 130 moves in the joint channel 121, the shaking of the valve core 130 can be avoided.

[0112] Please continue to see Figure 7 As shown, the connector assembly 100 also includes a lead-out connector 140, which is used to connect to a liquid supply device; when the lead-out connector 140 is inserted at the second end 1213, the lead-out connector 140 is used to push open the valve core 130 so that the lead-out connector 140, the connector channel 121 and the cold plate 113 are connected in sequence; when the lead-out connector 140 is pulled out from the second end 1213, the valve core 130 is used to block the valve port 1211.

[0113] Please continue to see Figure 6 As shown, when the battery pack 10 needs to be maintained, the lead connector 140 needs to be pulled out from the connector channel 121 . At this time, the valve core 130 can be sealed on the valve port 1211 , thereby preventing the coolant in the cold plate 113 from being sprayed out from the connector channel 121 .

[0114] Please continue to see Figure 7 As shown, when it is necessary to provide cooling liquid to the cooling device, the lead-out connector 140 is inserted into the connector channel 121 from the second end 1213 of the connector channel 121 ( Figure 7The insertion direction is shown by an arrow in the figure), the lead-out connector 140 applies pressure toward the first end 1212 on the blocking portion 131, so that the blocking portion 131 overcomes the elastic force of the elastic member 122, and the blocking portion 131 can move away from the second limiting portion 1215, and the coolant can flow into the connector channel 121 from between the second limiting portion 1215 and the blocking portion 131, and then flow into the cold plate 113 along the connector channel 121. In other words, the valve core 130 and the valve port 1211 can be opened while the lead-out connector 140 is inserted into the connector channel 121, so that no additional action is required during the opening process of the valve core 130 and the valve port 1211.

[0115] Fig.11 A schematic diagram of the structure of a lead-out connector in a connector assembly provided in an embodiment of the present application.

[0116] See also Figure 7 and Fig.11 As shown, a mounting wall 142 is provided on one end of the lead-out joint 140 facing the joint channel 121, and the lead-out joint 140 includes a protrusion 141, which protrudes from the mounting wall 142 toward the joint channel 121, and a second connecting hole 1421 is provided on the mounting wall 142; when the protrusion 141 pushes open the valve core 130, the lead-out joint 140 and the joint channel 121 are connected via the second connecting hole 1421, so that the coolant can enter the joint channel 121 through the lead-out joint 140, and then enter the cold plate 113 via the joint channel 121.

[0117] Please continue to see Figure 5 As shown, the cold plate 113 has a first interface 111 and a second interface 112, one of which is a liquid inlet and the other is a liquid outlet. The coolant enters the cold plate 113 from the liquid inlet and flows out from the liquid outlet after circulating in the cold plate 113. Correspondingly, the joint channel 121 includes a first joint channel 121a and a second joint channel 121b, and a first end 1212 of one of the first joint channel 121a and the second joint channel 121b is in communication with the first interface 111, and a first end 1212 of the other is in communication with the second interface 112.

[0118] Please continue to see Figure 5 and Fig.11As shown, the inner diameter of the second end 1213 of the first joint channel 121a is different from that of the second end 1213 of the second joint channel 121b; the lead-out joint 140 includes a first lead-out joint 143 and a second lead-out joint 144, the outer diameter of the first lead-out joint 143 matches the inner diameter of the second end 1213 of the first joint channel 121a and is inserted in the second end 1213 of the first joint channel 121a, and the outer diameter of the second lead-out joint 144 matches the inner diameter of the second end 1213 of the second joint channel 121b and is inserted in the second end 1213 of the second joint channel 121b.

[0119] exist Figure 5 In the illustrated embodiment, the first end 1212 of the first joint channel 121a is in communication with the first interface 111, and the second end 1213 of the first joint channel 121a is used to insert the first lead-out joint 143. The first end 1212 of the second joint channel 121b is in communication with the second interface 112, and the second end 1213 of the second joint channel 121b is used to insert the second lead-out joint 144. The inner diameter of the second end 1213 of the second joint channel 121b can be made larger than the inner diameter of the second end 1213 of the first joint channel 121a, thereby, the outer diameter of the second lead-out joint 144 matched with the second end 1213 of the second joint channel 121b is also larger than the outer diameter of the first lead-out joint 143 matched with the second end 1213 of the first joint channel 121a, thereby, the lead-out joint 140 can be prevented from being installed reversely with the joint channel 121.

[0120] Please continue to see Figure 5 and Fig.10 As shown, the lead-out connector 140 further includes a connector body 145 , the first lead-out connector 143 and the second lead-out connector 144 are both connected to the connector body 145 , and the connector body 145 is detachably connected to a side of the cooling connector 120 facing the connector body 145 .

[0121] The first lead-out joint 143 and the second lead-out joint 144 may be disposed side by side on the joint body 145 and connected to the joint body 145. For example, the first lead-out joint 143, the second lead-out joint 144 and the joint body 145 may be integrally formed.

[0122] The joint body 145 has a first mounting hole 1451, and the cooling joint 120 has a second mounting hole 123. Fasteners are inserted into the first mounting hole 1451 and the second mounting hole 123, and the joint body 145 can be connected to the cooling joint 120. The joint body 145 can connect the first lead joint 143 and the second lead joint 144 together. Therefore, when the joint body 145 is connected to the cooling joint 120, the first lead joint 143 can be inserted into the first joint channel 121a and the second lead joint 144 can be inserted into the second joint channel 121b. The plugging of the first lead joint 143 with the first joint channel 121a and the plugging of the second lead joint 144 with the second joint channel 121b can be completed at the same time, so that the installation steps of the lead joint 140 and the cooling joint 120 are relatively simple.

[0123] Please continue to refer to FIG. 5 , at the first joint channel 121a, a second sealing ring 146 is provided between the cooling joint 120 and the joint body 145; at the second joint channel 121b, a third sealing ring 147 is provided between the cooling joint 120 and the joint body 145.

[0124] When the lead-out joint 140 is connected to the cooling joint 120, the joint body 145 and the cooling joint 120 compress the second sealing ring 146 and the third sealing ring 147, so that the second sealing ring 146 seals the connection between the first joint channel 121a and the first lead-out joint 143, and the third sealing ring 147 seals the connection between the second joint channel 121b and the second lead-out joint 144.

[0125] Next, the specific structure of the cold plate 113 will be described.

[0126] Fig.12 Another exploded schematic diagram of the cooling device provided in the embodiment of the present application.

[0127] See also Figure 4 , Figure 5 and Fig.12 As shown, the cooling device 110 also includes an adapter 114, in which a adapter pipe 115 is arranged, and the adapter pipe 115 has a third end 1151 and a fourth end 1152 relative to each other. The third end 1151 of the adapter pipe 115 is connected to the first end 1212 of the joint channel 121, and the fourth end 1152 of the adapter pipe 115 is connected to the circulation pipe 1131.

[0128] The cold plate 113 can be covered on the battery module, and the adapter 114 can be led out from the cold plate 113 according to the specific structure of the box 200 on which the cold plate 113 is installed, so as to connect the cold plate 113 and the cooling joint 120. Compared with the connection of the cold plate body and the cooling nozzle through a hose in the relative technology, the connection of the cold plate 113 and the cooling joint 120 through the adapter 114 makes the connection between the cold plate 113 and the cooling joint 120 more reliable.

[0129] Specifically, the end of the adapter pipe 115 in the adapter 114 that faces the cooling joint 120 is the third end 1151, and the third end 1151 is used to communicate with the joint channel 121. The end of the adapter pipe 115 that faces the cold plate 113 is the fourth end 1152, and the fourth end 1152 is used to align with the circulation pipeline 1131 in the cold plate 113 and communicate with the circulation pipeline 1131.

[0130] Fig.13 A schematic diagram of the structure of a transition piece in a cooling device provided in an embodiment of the present application.

[0131] See also Fig.12 and Fig.13 As shown, the transfer pipe 115 includes a first transfer pipe 115a and a second transfer pipe 115b. The first transfer pipe 115a has a first interface 111, and the second transfer pipe 115b has a second interface 112. The first interface 111 is connected to the first joint channel 121a, and the second interface 112 is connected to the second joint channel 121b.

[0132] Therefore, the flow path of the coolant is: the coolant enters the circulation pipeline 1131 through the first lead-out joint 143, the first joint channel 121a, and the first transfer pipe 115a in sequence, and after circulating in the circulation pipeline 1131, it flows out through the second transfer pipe 115b, the second joint channel 121b, and the second lead-out joint 144 in sequence.

[0133] The circulation pipeline 1131 is bifurcated in the cold plate 113 to form two circulation branches 1131a. The two circulation branches 1131a can be merged at the transfer pipeline 115, thereby reducing the flow resistance of the coolant in the circulation branch 1131a. For adaptability, please continue to refer to Fig.13 As shown, the second transfer line 115b includes a transfer branch 1153. There may be two transfer branches 1153, and the fourth ends 1152 of the two transfer branches 1153 are respectively connected to the two circulation branches 1131a, and the two transfer branches 1153 may converge at the second interface 112.

[0134] Please continue to see Figure 5 and Fig.12 As shown, a fourth sealing ring 1141 is provided between the adapter 114 and the cooling joint 120 .

[0135] The adapter 114 and the cooling joint 120 compress the fourth sealing ring 1141 from opposite sides, so that the fourth sealing ring 1141 can seal the connection between the adapter 114 and the cooling joint 120 .

[0136] One of the adapter 114 and the cooling joint 120 has a first mounting groove 1142 , the fourth sealing ring 1141 is located in the first mounting groove 1142 , and the fourth sealing ring 1141 is spaced apart with a first clamping portion 1141 a , which abuts against the groove wall of the first mounting groove 1142 .

[0137] The first mounting groove 1142 can be disposed on the adapter 114 or on the cooling joint 120. Fig.12 In the illustrated embodiment, the first installation groove 1142 is disposed on the adapter 114. The diameter of the fourth sealing ring 1141 at the first clamping portion 1141a is greater than the diameter of the fourth sealing ring 1141 at other portions, so that the first clamping portion 1141a can abut against the groove wall of the first installation groove 1142, preventing the fourth sealing ring 1141 from moving in the first installation groove 1142, so that the fourth sealing ring 1141 is installed in the first installation groove 1142 more stably.

[0138] Next, the connection method between the cooling device 110 and the housing 200 will be described.

[0139] Fig.14 A schematic diagram of the assembly process of a battery pack provided in an embodiment of the present application; Fig.15 A schematic diagram of the structure of a crossbeam in a battery pack provided in an embodiment of the present application; Fig.16 This is another schematic diagram of the structure of the crossbeam in the battery pack provided in an embodiment of the present application.

[0140] See also Fig.14 and Fig.16 As shown, the adapter 114 is located on the side of the side beam 220 facing the inside of the accommodating cavity 230 and is connected to the side beam 220, and the cooling joint 120 is located on the side of the side beam 220 facing the outside of the accommodating cavity 230 and is connected to the side beam 220; the side beam 220 has a through hole 221 that penetrates the side beam 220 along the thickness direction of the side beam 220, and the cooling joint 120 is partially inserted in the through hole 221 to communicate with the adapter 114.

[0141] The side of the side beam 220 facing the inside of the accommodating cavity 230 is a first surface 222, and the side of the side beam 220 facing the outside of the accommodating cavity 230 is a second surface 223. The first surface 222 has a first mounting portion 2221. Fig.12As shown, the adapter 114 has a second mounting portion 1143, and the first mounting portion 2221 is connected to the second mounting portion 1143, that is, the adapter 114 is connected to the side beam 220. For example, the first mounting portion 2221 has a third mounting hole 2221a, and the second mounting portion 1143 has a fourth mounting hole 1143a. The fastener is inserted into the third mounting hole 2221a and the fourth mounting hole 1143a to connect the adapter 114 and the side beam 220.

[0142] The second surface 223 has a third mounting portion 2231, please continue to refer to Fig.10 As shown, the cooling joint 120 has a fourth mounting portion 124, and the cooling joint 120 can be connected to the side beam 220 by connecting the third mounting portion 2231 with the fourth mounting portion 124. For example, the third mounting portion 2231 has a fifth mounting hole 2231a, and the fourth mounting portion 124 has a sixth mounting hole 1241. The fasteners are inserted into the fifth mounting hole 2231a and the sixth mounting hole 1241 to connect the cooling joint 120 and the side beam 220.

[0143] Arranging the adapter 114 on one side of the first surface 222 of the side beam 220 can facilitate the connection between the adapter 114 and the cold plate 113, and arranging the cooling joint 120 on one side of the second surface 223 of the side beam 220 can facilitate the connection between the cooling joint 120 and the lead-out joint 140. The side beam 220 has a high strength, and connecting the adapter 114 and the cooling joint 120 to the side beam 220 can make the adapter 114 and the cooling joint 120 more reliably fixed.

[0144] Providing a through hole 221 penetrating the first surface 222 and the second surface 223 in the side beam 220 and partially inserting the cooling joint 120 into the through hole 221 can facilitate communication between the first end 1212 of the cooling channel 121 in the cooling joint 120 and the first interface 111 and the second interface 112 in the adapter 114 .

[0145] Fig.17 Another exploded schematic diagram of the cooling device provided in an embodiment of the present application.

[0146] See also Fig.17 As shown, the adapter 114 includes a first adapter portion 1144 and a second adapter portion 1145. The first adapter portion 1144 is connected to the cold plate 113 and extends from the cold plate 113 along a first direction X. The second adapter portion 1145 is connected to the first adapter portion 1144 and extends along a second direction Y. The end face of the second adapter portion 1145 is flush with a side of the side beam 220 facing the inside of the accommodating cavity 230. The second direction Y is the thickness direction of the side beam 220, and the second direction Y has an angle with the first direction X.

[0147] The first direction X may be a thickness direction D of the box body 200 , and the second direction Y may be a length direction L or a width direction W of the box body.

[0148] The cold plate 113 covers the battery module, the first adapter 1144 can extend from the cold plate 113 along the first direction X toward the bottom plate 210 of the box body 200, and the second adapter 1145 extends from the first adapter 1144 along the second direction Y to facilitate the connection between the adapter 114 and the cooling joint 120.

[0149] When assembling the cold plate 113 on the battery module, the adhesive is first applied to the battery module. Therefore, when assembling the cold plate 113, it needs to be assembled in one step. In the related art, the cooling nozzle and the adapter are integrated. When assembling, the cold plate needs to be inserted between the side beam and the battery module at an angle relative to the battery module, and then the cold plate needs to be pushed relative to the battery module until the cooling nozzle coldly extends out of the side beam. In the process of pushing the cold plate, the adhesive will be scratched and cause the adhesive to overflow. In the embodiment of the present application, when assembling the cold plate 113, the end face of the second adapter portion 1145 is aligned with the first face 222 of the side beam 220 along the first direction X, and then the cold plate 113 is moved relative to the battery cell module to cover the battery cell module. At this time, the end face of the second adapter portion 1145 is flush with the first face 222 of the side beam 220, and then the cooling joint 120 is inserted into the through hole 221 to connect the cooling joint 120 with the adapter 114 without moving the cold plate 113 again, thereby avoiding adhesive overflow.

[0150] Fig.18 This is a schematic diagram of the structure of the fifth sealing ring in the cooling device provided in an embodiment of the present application. Fig.19 A schematic diagram of another assembly process of a battery pack provided in an embodiment of the present application.

[0151] See also Fig.16 , Fig.18 and Fig.19 As shown, a fifth sealing ring 224 is provided between the cooling joint 120 and the side of the side beam 220 facing the outside of the accommodating cavity 230 .

[0152] The side beam 220 and the cooling joint 120 compress the fifth sealing ring 224 from opposite sides, so that the fifth sealing ring 224 can seal the connection between the side beam 220 and the cooling joint 120 .

[0153] A second mounting groove 225 is provided on one side of the side beam 220 facing the outside of the accommodating cavity 230 and on one of the cooling joints 120 . The fifth sealing ring 224 is located in the second mounting groove 225 . A second clamping portion 2241 is spaced apart on the fifth sealing ring 224 . The second clamping portion 2241 abuts against the groove wall of the second mounting groove 225 .

[0154] The second mounting groove 225 may be disposed on the second surface 223 of the side beam 220, or may be disposed on the cooling joint 120. Fig.16 and Fig.19 In the illustrated embodiment, the second installation groove 225 is disposed on the second surface 223 of the side beam 220. The diameter of the fifth sealing ring 224 at the second clamping portion 2241 is greater than the diameter of the fifth sealing ring 224 at other portions, so that the fifth sealing ring 224 can abut against the groove wall of the second installation groove 225, thereby preventing the fifth sealing ring 224 from moving in the second installation groove 225, and making the fifth sealing ring 224 more stably installed in the second installation groove 225.

[0155] Please continue to see Fig.19 As shown, the fourth sealing ring 1141 and the fifth sealing ring 224 form a double-layer sealing structure, which can improve the sealing effect of the cooling device 110.

[0156] The embodiment of the present application also provides an electric device, including a liquid supply device and the battery pack 10 provided in the above embodiment, the battery pack 10 includes a cooling device 110, and the liquid supply device is used to provide cooling liquid to the cooling device 110. Among them, the structure of the battery pack has been described in detail in the above embodiment, and will not be repeated here. The battery pack is used to supply power to the electric device, and the electric device may include one battery pack or multiple battery packs.

[0157] The liquid supply device may include a liquid storage tank and a circulation pump. The liquid storage tank is connected to the cooling device 110 . The circulation pump provides power for the coolant to circulate between the cooling device 110 and the liquid storage tank to dissipate heat for the battery cell modules in the battery pack 10 .

[0158] The electrical equipment may be a vehicle, aircraft, ferry, computer or energy storage cabinet, etc., which is powered by a battery pack. The vehicle may be an electric vehicle (EV), a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or a new energy vehicle (NEV).

[0159] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A joint assembly, characterized in that: Used to connect the cold plate (113) and the liquid supply device, the joint assembly (100) comprises: A cooling joint (120), wherein the cooling joint (120) has a joint channel (121), wherein the joint channel (121) has a first end (1212) and a second end (1213) opposite to each other, wherein the first end (1212) is used to communicate with the cold plate (113), and the second end (1213) is used to communicate with the liquid supply device; A valve core (130), the valve core (130) is located in the joint channel (121), and the valve core (130) is used to open or block the joint channel (121).

2. The joint assembly according to claim 1, characterized in that: The joint channel (121) has a valve port (1211) therein, and the valve port (1211) is connected to the first end (1212) and the second end (1213). The valve core (130) is movably arranged in the joint channel (121) to open or close the valve port (1211), so that the joint channel (121) is open or blocked.

3. The joint assembly according to claim 2, characterized in that: A first limiting portion (1214) and a second limiting portion (1215) are provided inside the joint channel (121), the first limiting portion (1214) is provided close to the first end (1212), the second limiting portion (1215) is provided away from the first end (1212), and the second limiting portion (1215) has the valve port (1211); The valve core (130) is located between the first limiting portion (1214) and the second limiting portion (1215), and the valve core (130) includes a blocking portion (131) and an elastic member (122), wherein the blocking portion (131) faces the second limiting portion (1215), and one end of the elastic member (122) abuts against the first limiting portion (1214), and the other end abuts against the blocking portion (131), so that the blocking portion (131) abuts against the second limiting portion (1215) to block the valve port (1211).

4. The joint assembly according to claim 3, characterized in that: A first sealing ring (133) is provided on one side of the blocking portion (131) facing the second limiting portion (1215).

5. The joint assembly according to claim 3, characterized in that: An annular protrusion is formed on the inner wall of the joint channel (121), and the second limiting portion (1215) is configured as the annular protrusion.

6. The joint assembly according to claim 3, characterized in that: The first limiting portion (1214) comprises a limiting member, and the limiting member comprises a connected connecting plate (1214c) and an abutting plate (1214d), the connecting plate (1214c) has a first connecting hole (1214a), and the first connecting hole (1214a) is used to connect the joint channel (121) and the cold plate (113), and the elastic member (122) abuts against the abutting plate (1214d).

7. The joint assembly according to claim 6, characterized in that: The connecting plate (1214c) is threadedly connected to the inner wall of the joint channel (121).

8. The joint assembly according to claim 6, characterized in that: The limiting member further comprises an intermediate connecting portion (1214e), and along the extension direction of the joint channel (121), the connecting plate (1214c), the intermediate connecting portion (1214e) and the abutting plate (1214d) are sequentially connected, and the diameter of the intermediate connecting portion (1214d) is smaller than the diameter of the abutting plate (1214d).

9. The joint assembly according to claim 6, characterized in that: The limiting member is provided with a guide hole (1214b), and the valve core (130) further comprises a guide rod (132), wherein the guide rod (132) is connected to a side of the sealing portion (131) away from the second limiting portion (1215), the elastic member (122) is sleeved on the peripheral side of the guide rod (132), and an end of the guide rod (132) away from the sealing portion (131) is inserted into the guide hole (1214b).

10. The joint assembly according to any one of claims 2 to 9, characterized in that: It also includes an outlet connector (140), wherein the outlet connector (140) is used to connect to a liquid supply device; When the lead-out joint (140) is inserted into the second end (1213), the lead-out joint (140) is used to push open the valve core (130) so that the lead-out joint (140), the joint channel (121) and the cold plate (113) are connected in sequence; when the lead-out joint (140) is pulled out from the second end (1213), the valve core (130) is used to block the valve port (1211).

11. The joint assembly according to claim 10, characterized in that: A mounting wall (142) is provided on one end of the lead-out connector (140) facing the connector channel (121), the lead-out connector comprises a protrusion (141), the protrusion (141) protrudes from the mounting wall (142) toward the connector channel (121), and a second connecting hole (1421) is provided on the mounting wall (142); When the protrusion (141) pushes open the valve core (130), the lead-out joint (140) and the joint channel (121) are connected via the second connecting hole (1421).

12. The joint assembly according to claim 10, characterized in that: The joint channel (121) comprises a first joint channel (121a) and a second joint channel (121b), wherein the inner diameters of the second end (1213) of the first joint channel (121a) and the second end (1213) of the second joint channel (121b) are different; The lead-out joint (140) comprises a first lead-out joint (143) and a second lead-out joint (144); the outer diameter of the first lead-out joint (143) matches the inner diameter of the second end (1213) of the first joint channel (121a) and is inserted into the second end (1213) of the first joint channel (121a); ​​the outer diameter of the second lead-out joint (144) matches the inner diameter of the second end (1213) of the second joint channel (121b) and is inserted into the second end (1213) of the second joint channel (121b).

13. The joint assembly according to claim 12, characterized in that: The lead-out connector (140) further includes a connector body (145), the first lead-out connector (143) and the second lead-out connector (144) are both connected to the connector body (145), and the connector body (145) is detachably connected to a side of the cooling connector (120) facing the connector body (145).

14. The joint assembly according to claim 13, characterized in that: At the first joint channel (121a), a second sealing ring (146) is provided between the cooling joint (120) and the joint body (145); and at the second joint channel (121b), a third sealing ring (147) is provided between the cooling joint (120) and the joint body (145).

15. A cooling device, characterized in that: The cooling device (110) comprises a cold plate (113) and a joint assembly (100) according to any one of claims 1 to 14, the cold plate (113) comprises a circulation pipeline (1131), and the first end (1212) of the joint channel (121) is connected to the circulation pipeline (1131).

16. The cooling device according to claim 15, characterized in that The invention also comprises an adapter (114), wherein a adapter pipe (115) is arranged in the adapter (114), and the adapter pipe (115) has a third end (1151) and a fourth end (1152) which are opposite to each other, and the third end (1151) of the adapter pipe (115) is connected to the first end (1212), and the fourth end (1152) of the adapter pipe (115) is connected to the circulation pipe (1131).

17. The cooling device according to claim 16, characterized in that The transfer pipe (115) comprises a first transfer pipe (115a) and a second transfer pipe (115b); the first transfer pipe (115a) has a first interface (111); the second transfer pipe (115b) has a second interface (112); the joint channel (121) comprises a first joint channel (121a) and a second joint channel (121b); the first interface (111) is in communication with the first joint channel (121a); ​​and the second interface (112) is in communication with the second joint channel (121b).

18. The cooling device according to claim 17, characterized in that The second transfer pipeline (115b) includes a transfer branch (1153), the circulation pipeline (1131) includes a circulation branch (1131a), and the transfer branch (1153) is connected to the circulation branch (1131a) in a one-to-one correspondence.

19. The cooling device according to claim 16, characterized in that A fourth sealing ring (1141) is provided between the adapter (114) and the cooling joint (120).

20. The cooling device according to claim 19, characterized in that A first mounting groove (1142) is provided on one of the adapter (114) and the cooling joint (120), the fourth sealing ring (1141) is located in the first mounting groove (1142), a first clamping portion (1141a) is spaced apart on the fourth sealing ring (1141), and the first clamping portion (1141a) abuts against the groove wall of the first mounting groove (1142).

21. A battery pack, characterized in that: The invention comprises a box body (200), a battery cell module and a cooling device (110) according to any one of claims 15 to 20, wherein the box body (200) comprises a bottom plate (210) and a side beam (220), the bottom plate (210) and the side beam (220) are arranged to form a receiving cavity (230), the battery cell module is located in the receiving cavity (230), and the cold plate (113) of the cooling device (110) is connected to the battery cell module.

22. The battery pack according to claim 21, characterized in that: The cooling device (110) also includes an adapter (114), and the cold plate (113), the adapter (114) and the cooling joint (120) are connected in sequence; the adapter (114) is located on the side of the side beam (220) facing the inside of the accommodating cavity (230) and is connected to the side beam (220), and the cooling joint (120) is connected to the side beam (220); the side beam (220) has a through hole (221) that penetrates the side beam (220) along the thickness direction of the side beam (220), and the cooling joint (120) is partially inserted in the through hole (221) to be connected with the adapter (114).

23. The battery pack according to claim 22, characterized in that: The adapter (114) comprises a first adapter portion (1144) and a second adapter portion (1145), wherein the first adapter portion (1144) is connected to the cold plate (113) and extends from the cold plate (113) along a first direction, and the second adapter portion (1145) is connected to the first adapter portion (1144) and extends along a second direction, wherein the second direction is a thickness direction of the side beam (220), and the second direction has an angle with the first direction.

24. The battery pack according to any one of claims 21 to 23, characterized in that: A fifth sealing ring (224) is provided between the cooling joint (120) and the side of the side beam (220) facing the outside of the accommodating cavity (230).

25. The battery pack according to claim 24, characterized in that: A second mounting groove (225) is provided on one side of the side beam (220) facing the outside of the accommodating cavity (230) and one of the cooling joints (120); the fifth sealing ring (224) is located in the second mounting groove (225); a second clamping portion (2241) is spaced apart on the fifth sealing ring (224); the second clamping portion (2241) abuts against the groove wall of the second mounting groove (225).

26. An electrical equipment, characterized in that: It comprises a liquid supply device and a battery pack (10) as claimed in any one of claims 21 to 25, wherein the liquid supply device is used to provide cooling liquid to a cooling device (110) of the battery pack (10).

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