Connector assembly, battery and electric equipment

Abstract

The utility model provides a connector assembly, a battery and electric equipment, and relates to the technical field of batteries. The connector assembly comprises a connector and an extension rod, a guide groove and a plurality of limiting grooves are formed in the inner wall of the connector, the extension direction of the guide groove and the arrangement direction of the limiting grooves are consistent with the length direction of the connector, the extension direction of each limiting groove is consistent with the extension direction of the guide groove, and each limiting groove is communicated with the guide groove; the extension rod is rotatably connected with the connector, a boss is arranged on the outer wall of the extension rod, the boss can be in sliding fit with the guide groove, the boss can be in interference fit with the limiting groove, and the length of the extension rod can be adjusted according to requirements so that the extension rod can meet the installation requirements under different conditions.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and more particularly, to a joint assembly, a battery, and an electrical device. Background Art

[0002] With the rapid expansion and development of the new energy market, the market share of new energy vehicles has gradually increased, and consumers' choices are increasingly inclined to new energy vehicles. For this reason, people's attention and requirements for the core component of new energy vehicles, the power battery, are also getting higher and higher. It is required that electric vehicles can provide sufficient driving range and performance for the whole vehicle. Among them, the thermal management of the power battery plays a crucial role.

[0003] As an important component in the thermal management system, the pipeline joint plays a role in conducting the coolant. Due to different envelope spaces and vehicle installation positions, the pipeline joint needs to be dimensionally matched according to the actual situation. If there are joints of multiple lengths in a battery, it is often easy to have the problem of material mixing, causing unnecessary troubles such as material scrapping. Summary of the Utility Model

[0004] The objectives of the present application include, for example, providing a joint assembly that can adjust its length according to requirements to adapt to installation requirements in different situations.

[0005] The present application also aims to provide a battery in which the joint assembly can adjust its length according to requirements to adapt to installation requirements in different situations.

[0006] The present application further aims to provide an electrical device in which the joint assembly can adjust its length according to requirements to adapt to installation requirements in different situations.

[0007] The present application can be implemented as follows:

[0008] In a first aspect, the present application provides a joint assembly, which includes:

[0009] A joint, in which a guiding groove and a plurality of limiting grooves are provided on the inner wall of the joint. The extending direction of the guiding groove and the arranging direction of the plurality of limiting grooves are both consistent with the length direction of the joint. The extending direction of each limiting groove is consistent with the extending direction of the guiding groove, and each limiting groove communicates with the guiding groove;

[0010] An extension rod, which is rotatably connected to the joint. A boss is provided on the outer wall of the extension rod. The boss can be slidably engaged with the guiding groove, and the boss can be in interference fit with the limiting groove.

[0011] Optionally, a sealing groove is provided on the inner wall of the joint, which is circumferentially opened around the joint. The sealing groove intersects and communicates with the guiding groove, and a first sealing ring is embedded in the sealing groove to seal the joint assembly in an interference fit.

[0012] Optionally, the sealing groove includes a first sealing groove, which is arranged at one end of the joint connected to the extension rod. A plurality of the limiting grooves are arranged at intervals in the direction away from the first sealing groove;

[0013] The sealing groove further includes a plurality of second sealing grooves, and each second sealing groove is arranged at one end of the corresponding limiting groove away from the first sealing groove.

[0014] Optionally, the limiting groove communicates with the guiding groove through a connecting groove. The connecting groove extends along the circumference of the joint. The limiting groove is connected to one end of the connecting groove away from the guiding groove and extends in the extending direction of the joint in the direction away from the first sealing groove;

[0015] A limiting portion is convexly provided on the side wall of the limiting groove away from the guiding groove. The boss is elastic, and the limiting portion can be used to limit the boss.

[0016] Optionally, the height of the first sealing ring embedded in the second sealing groove is greater than that of the limiting groove, so as to block the boss by the first sealing ring embedded in the second sealing groove;

[0017] Along the extending direction of the joint, the boss can be limited between the first sealing ring embedded in the second sealing groove and the limiting portion of the limiting groove corresponding to the second sealing groove, or the boss can be limited between the inner wall of the limiting groove away from the first sealing groove and the limiting portion of the limiting groove.

[0018] Optionally, the depth of the first sealing groove is greater than that of the guiding groove, and the depth of the second sealing groove is greater than that of the limiting groove.

[0019] Optionally, a flange is provided on the extension rod. The flange has a set distance from the boss, and a second sealing ring is embedded on the surface of the flange facing away from the joint.

[0020] In a second aspect, the present application further provides a battery, including a liquid cooling plate, a box body and the joint assembly. The liquid cooling plate is arranged in the box body, and the joint assembly is arranged on the liquid cooling plate and / or the box body. The joint assembly is welded, bonded or bolted to the liquid cooling plate, and / or the joint assembly is welded, bonded or bolted to the box body.

[0021] Optionally, the battery includes a liquid inlet pipeline and a liquid outlet pipeline. A plurality of the joint assemblies are arranged along the length directions of the liquid inlet pipeline and the liquid outlet pipeline respectively. The number of the liquid cooling plates is multiple. Each single liquid cooling plate is simultaneously connected to one of the joint assemblies on the liquid inlet pipeline and one of the joint assemblies on the liquid outlet pipeline. The liquid inlet pipeline is provided with a liquid inlet, and the liquid outlet pipeline is provided with a liquid outlet. One joint assembly is connected to each of the liquid inlet and the liquid outlet.

[0022] In a third aspect, the present application further provides an electrical equipment including the battery described above.

[0023] The beneficial effects of the joint assembly, the battery and the electrical equipment of the present application include, for example: In order to be able to adjust the length of the joint according to requirements to adapt to the installation requirements in different situations, a joint assembly is designed. The joint assembly includes a joint and an extension rod. The inner wall of the joint is provided with a guiding groove and a plurality of limiting grooves. The extending direction of the guiding groove and the arranging direction of the plurality of limiting grooves are both consistent with the length direction of the joint. The extending direction of each limiting groove is consistent with the extending direction of the guiding groove, and each limiting groove communicates with the guiding groove; The extension rod is rotatably connected to the joint. The outer wall of the extension rod is provided with a boss. The boss can be slidably matched with the guiding groove, and the boss can be in interference fit with the limiting groove. During the use of the joint assembly, if it is necessary to change the size of the joint assembly, push or pull the extension rod relative to the joint so that the boss slides in the guiding groove. When the boss slides to a suitable position, rotate the extension rod relative to the joint so that the boss moves into the limiting groove and is in interference fit with the limiting groove. At this time, the joint and the extension rod are relatively fixed, thereby adjusting the length of the joint assembly. Setting a plurality of such joint assemblies in a battery is not likely to cause the problem of material mixing. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of the first joint assembly in the embodiment of the present application;

[0026] Figure 2 It is an exploded view of the joint assembly in the embodiment of the present application;

[0027] Figure 3 It is a schematic structural diagram of the joint in the embodiment of the present application;

[0028] Figure 4 ForFigure 3 Enlarged view of part A

[0029] Figure 5 Schematic structural diagram of the second joint assembly in the embodiment of the present application

[0030] Figure 6 Schematic structural diagram of the battery in the embodiment of the present application

[0031] Figure 7 Partial schematic structural diagram of the battery in the embodiment of the present application

[0032] Reference numerals: 100 - joint assembly; 110 - joint; 111 - guiding groove; 112 - limiting groove; 113 - first sealing groove; 114 - second sealing groove; 115 - connecting groove; 116 - limiting portion; 120 - extension rod; 121 - boss; 122 - flange; 1221 - second sealing ring; 200 - liquid cooling plate; 300 - box body; 400 - liquid inlet pipeline; 410 - liquid inlet; 500 - liquid outlet pipeline; 510 - liquid outlet Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application

[0035] It should be noted that: like reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings

[0036] In the description of the present application, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application

[0037] In addition, terms such as "first" and "second" are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0038] It should be noted that, without conflict, the features in the embodiments of the present application can be combined with each other.

[0039] The inventors of the present application have found that the pipe joint, as an important component in the thermal management system, plays a role in conducting the coolant. Due to different envelope spaces and vehicle installation positions, the pipe joint needs to be dimensionally matched according to the actual situation. For one battery, several pipe joints with different lengths are required. However, if there are multiple pipe joints with different lengths in one battery, it is often easy to have the problem of material mixing, causing unnecessary troubles such as material scrapping. The embodiments of the present application provide a joint assembly that can adjust the length according to requirements to adapt to the installation requirements in different situations.

[0040] Please refer to Figures 1 - 5 , the joint assembly 100 provided by the embodiments of the present application includes a joint 110 and an extension rod 120. A guide groove 111 and a plurality of limiting grooves 112 are provided on the inner wall of the joint 110. The extending direction of the guide groove 111 and the arranging direction of the plurality of limiting grooves 112 are both consistent with the length direction of the joint 110. The extending direction of each limiting groove 112 is consistent with the extending direction of the guide groove 111, and each limiting groove 112 communicates with the guide groove 111; the extension rod 120 is rotatably connected to the joint 110. A boss 121 is provided on the outer wall of the extension rod 120. The boss 121 can be slidably matched with the guide groove 111, and the boss 121 can be in interference fit with the limiting groove 112.

[0041] The arranging manner of the plurality of limiting grooves 112 can be evenly spaced arrangement or unevenly spaced arrangement, which can be specifically determined according to the actual required length value of the joint assembly 100. When the actual required multiple length values of the joint assembly 100 are in an arithmetic progression, the arranging manner of the plurality of limiting grooves 112 is evenly spaced arrangement. When the actual required multiple length values of the joint assembly 100 are not in an arithmetic progression, the arranging manner of the plurality of limiting grooves 112 is unevenly spaced arrangement.

[0042] During the use of the connector assembly 100, if it is necessary to change the length of the connector assembly 100, push or pull the extension rod 120 relative to the connector 110 so that the boss 121 slides in the guiding groove 111. When the boss 121 slides to a suitable position, rotate the extension rod 120 relative to the connector 110 so that the boss 121 moves into the limiting groove 112 and is in interference fit with the limiting groove 112. At this time, the connector 110 and the extension rod 120 are relatively fixed, thereby adjusting the length of the connector assembly 100. Setting multiple such connector assemblies 100 in a battery is not likely to cause the problem of material mixing. It should be noted that during the length adjustment process, the connector 110 can also be pushed or pulled relative to the extension rod 120, and the connector 110 can be rotated relative to the extension rod 120, which can be adjusted according to needs as long as the relative movement between the connector 110 and the extension rod 120 can be achieved.

[0043] In some embodiments, a sealing groove is provided on the inner wall of the connector 110 and is circumferentially opened around the connector 110. The sealing groove intersects and communicates with the guiding groove 111, and a first sealing ring (not shown in the figure) is embedded in the sealing groove to seal the connector assembly 100 in an interference fit manner.

[0044] When the extension rod 120 is inserted into the inside of the connector 110, the outer wall of the extension rod 120 will abut against the first sealing ring, thereby achieving a good sealing effect, improving the sealing performance of the connector assembly 100, and preventing the risk of liquid leakage.

[0045] In some embodiments, the sealing groove includes a first sealing groove 113 which is provided at one end of the connector 110 where it is connected to the extension rod 120, and a plurality of limiting grooves 112 are arranged at intervals in the direction away from the first sealing groove 113; the sealing groove further includes a plurality of second sealing grooves 114, and each second sealing groove 114 is provided at one end of the corresponding limiting groove 112 away from the first sealing groove 113.

[0046] The first sealing groove 113 is close to the end of the connector 110 where it is connected to the extension rod 120. Each second sealing groove 114 corresponds to one limiting groove 112. Each second sealing groove 114 is farther away from the first sealing groove 113 than the corresponding limiting groove 112 to which it belongs. A second sealing groove 114 may not be provided on the side of the deepest limiting groove 112 inside the connector 110 away from the first sealing groove 113, and a first sealing ring is also embedded in each second sealing groove 114.

[0047] When the extension rod 120 is inserted into the interior of the joint 110, the outer wall of the extension rod 120 will abut against the first sealing rings within the first sealing groove 113 and the second sealing groove 114, and the multiple first sealing rings can further enhance the sealing effect. That is, during connection, it can be ensured that the first sealing rings within the first sealing groove 113 and the second sealing groove 114 play a dual sealing role for the joint assembly 100, further improving the sealing performance of the overall joint assembly 100 and ensuring the sealing effect.

[0048] In some embodiments, the limiting groove 112 communicates with the guiding groove 111 through a connecting groove 115. The connecting groove 115 extends along the circumferential direction of the joint 110. The limiting groove 112 is connected to one end of the connecting groove 115 away from the guiding groove 111 and extends in a direction away from the first sealing groove 113 along the extending direction of the joint 110; a limiting portion 116 protrudes from the side wall of the limiting groove 112 away from the guiding groove 111, and the limiting portion 116 is provided with a chamfer for the boss 121 to pass through; the boss 121 has elasticity, the end of the boss 121 is provided with a rounded corner, and the limiting portion 116 is used to limit the boss 121.

[0049] When the boss 121 slides to a suitable position, rotate the extension rod 120 relative to the joint 110 so that the boss 121 moves into the limiting groove 112, and then move the extension rod 120 along the extending direction of the limiting groove 112. After the boss 121 passes through the limiting portion 116, the limiting portion 116 can limit the boss 121, making the joint 110 and the extension rod 120 relatively fixed, thereby adjusting the length of the joint assembly 100. Through the limiting groove 112 communicating with the guiding groove 111, while facilitating the adjustment of the length, it is also convenient to achieve limiting, simplifying the operation and improving the adjustment efficiency.

[0050] Furthermore, the height of the first sealing ring embedded in the second sealing groove 114 is greater than that of the limiting groove 112 to block the boss 121 through the first sealing ring embedded in the second sealing groove 114 while ensuring the sealing effect; along the extending direction of the joint 110, the boss 121 can be limited between the first sealing ring embedded in the second sealing groove 114 and the limiting portion 116 of the corresponding limiting groove 112 of the second sealing groove 114, or the boss 121 can be limited between the inner wall of the limiting groove 112 away from the first sealing groove 113 and the limiting portion 116 of the limiting groove 112.

[0051] When the limiting groove 112 is not connected with the corresponding second sealing groove 114, the limiting portion 116 can cooperate with the limiting groove 112 to limit the boss 121 away from the inner wall of the first sealing groove 113. At this time, the first sealing ring in the second sealing groove 114 can stop the part of the boss 121 that is higher than the limiting groove 112; when the limiting groove 112 is connected with the corresponding second sealing groove 114, the limiting portion 116 can cooperate with the first sealing ring in the corresponding second sealing groove 114 to limit the boss 121. Regardless of whether the limiting portion 116 cooperates with the limiting groove 112 to limit the boss 121 away from the inner wall of the first sealing groove 113, or the limiting portion 116 cooperates with the first sealing ring in the corresponding second sealing groove 114 to limit the boss 121, the extension rod 120 and the joint 110 can be relatively fixed, thereby improving the limiting reliability.

[0052] In some embodiments, the depth of the first sealing groove 113 is greater than that of the guide groove 111 , and the depth of the second sealing groove 114 is greater than that of the limiting groove 112 .

[0053] The depths of the guide groove 111 and the limiting groove 112 are substantially the same, so as to facilitate installation and removal. The depth of the first sealing groove 113 and the depth of the second sealing groove 114 are substantially the same, and the first sealing groove 113 and the second sealing groove 114 are both embedded with a first sealing ring. The first sealing groove 113 and the second sealing groove 114 with larger depths are convenient for accommodating the first sealing ring to prevent the first sealing ring from moving.

[0054] When the boss 121 passes through any first sealing ring, the first sealing ring is compressed and deformed, and the boss 121 passes through the first sealing ring smoothly. It is precisely because the sealing ring is deformed by the pressure of the boss 121 that the operator can feel obvious resistance during the movement, thereby knowing that the boss 121 on the extension rod 120 has passed through several sealing rings. When the boss 121 passes through the first sealing ring, the extension rod 120 can be rotated relative to the joint 110, so that the boss 121 moves into the limiting groove 112. At this time, the limiting portion 116 can limit the boss 121; when the joint assembly 100 is perpendicular to the horizontal plane, due to the downward gravity of the joint 110, the boss 121 will be against the inner wall of the limiting groove 112 or the first sealing ring. In addition, with the existence of the limiting portion 116 and the interference fit, it is difficult for the boss 121 to fall out of the limiting groove 112, thereby keeping the length of the joint assembly 100 fixed.

[0055] Exemplarily, when there is one first sealing groove 113 and three second sealing grooves 114 in the joint 110, there are four first sealing rings in the joint 110. When the boss 121 passes through the first first sealing ring, the extension rod 120 can be moved and rotated to make the boss 121 enter the first limiting groove 112 through the connecting groove 115. After passing through the limiting portion 116 in the limiting groove 112, the boss 121 is clamped in the first limiting groove 112 in an interference fit manner. Similarly, when the structure of the boss 121 passes through the second first sealing ring, the operator can feel two obvious resistances, and then by moving and rotating the extension rod 120, the boss 121 can be smoothly clamped in the second limiting groove 112; when the boss 121 passes through the third first sealing ring, the operator can feel three obvious resistances, and then by moving and rotating the extension rod 120, the boss 121 can be smoothly clamped in the third limiting groove 112; when the boss 121 passes through the fourth first sealing ring, the operator can feel four obvious resistances, and then by moving and rotating the extension rod 120, the boss 121 can be smoothly clamped in the fourth limiting groove 112, thus realizing gear adjustment. By feeling the resistance, different adjustment lengths can be determined, and the adjustment length can be determined without setting an external observation structure.

[0056] It can be understood that the number of the second sealing grooves 114 in the joint 110 can be determined according to the actual working conditions. For example, the number of the second sealing grooves 114 can be more than four.

[0057] In some embodiments, a flange 122 is provided on the extension rod 120 for positioning and connecting the extension rod 120. The flange 122 has a set distance from the boss 121 to determine the adjustment length, and a second sealing ring 1221 is embedded on the surface of the flange 122 facing away from the joint 110.

[0058] The extension rod 120 has opposite first and second ends. The boss 121 is close to the first end of the extension rod 120, and the flange 122 is close to the second end of the extension rod 120. The shape of the flange 122 can be a polygon such as a circle or a triangle, which is not limited; when the flange 122 is connected to the box body 300, the second sealing ring 1221 can ensure the sealing between the joint assembly 100 and the box body 300.

[0059] When the flange 122 is of a metal structure, it is cooperated with the box body 300 or the liquid cooling plate 200 and sealed by laser welding or brazing. When the flange 122 is of an injection molding structure, it is cooperated with the box body 300 or the liquid cooling plate 200 and sealed by bonding or bolt fixing.

[0060] In addition, the connector 110 can be selected in different models and specifications according to needs, such as SAE, CQC, VDA and other models, and the material of the connector 110 can be selected as metal or injection molded parts according to needs, such as the connector 110 is injection molded, and the material is PA66+30GF. The material of the first sealing ring can be EPDM or silicone rubber, which can play a sealing role after being matched with the extension rod 120. The material of the extension rod 120 can be injection molded or metal, such as the extension rod 120 is an injection molded structure, and the material is PA66+30GF.

[0061] Please refer to Figure 6 , Figure 7 The embodiment of the present application also provides a battery, including a liquid cooling plate 200, a box 300 and the above-mentioned joint assembly 100, wherein the liquid cooling plate 200 is arranged in the box 300, and the joint assembly 100 is arranged on the liquid cooling plate 200 and / or the box 300, and the joint assembly 100 is welded, bonded or bolted to the liquid cooling plate 200, and / or the joint assembly 100 is welded, bonded or bolted to the box 300. A plurality of battery cells are arranged in the box 300 of the battery, and the liquid cooling plate 200 is used to implement thermal management on the battery cells.

[0062] The joint assembly 100 can be set on both the liquid cooling plate 200 and the box body 300. When the joint assembly 100 is set on the liquid cooling plate 200, the joint assembly 100 is welded, bonded or bolted to the liquid cooling plate 200. When the joint assembly 100 is set on the box body 300, the joint assembly 100 is welded, bonded or bolted to the box body 300.

[0063] The battery also includes a liquid inlet pipeline 400 and a liquid outlet pipeline 500, and the liquid inlet pipeline 400 and the liquid outlet pipeline 500 are each provided with a plurality of joint assemblies 100 along their length direction. There are multiple liquid cooling plates 200, and a single liquid cooling plate 200 is simultaneously connected to one of the joint assemblies 100 on the liquid inlet pipeline 400 and one of the joint assemblies 100 on the liquid outlet pipeline 500. The liquid inlet pipeline 400 is provided with a liquid inlet 410, and the liquid outlet pipeline 500 is provided with a liquid outlet 510, and a joint assembly 100 is connected to each of the liquid inlet 410 and the liquid outlet 510.

[0064] The liquid inlet pipeline 400 and the liquid outlet pipeline 500 can both be fixed to the box body 300, and a single liquid cooling plate 200 is simultaneously connected to one of the joint assemblies 100 on the liquid inlet pipeline 400 and one of the joint assemblies 100 on the liquid outlet pipeline 500, so that the liquid cooling plate 200 can achieve liquid inlet and liquid outlet circulation; a joint assembly 100 is connected to each of the liquid inlet 410 and the liquid outlet 510, so that the liquid inlet 410 and the liquid outlet 510 can be connected to an external liquid cooling device.

[0065] For the joint assembly 100 connected to the liquid cooling plate 200, during the gear adjustment process of the joint assembly 100, each time a gear is changed, not only can the length of the joint assembly 100 be adjusted, but also the flow distribution of the thermal management system can be achieved. That is, when the inner diameter of the joint 110 is the same, the longer the size of the joint assembly 100, the relatively greater the flow resistance. In a parallel cooling system, the smaller the flow rate obtained. By adjusting the flow distribution of the entire cooling system, the length of the joint assembly 100 on the liquid cooling plate 200 closest to the joint assembly 100 on the liquid inlet 410 is the longest. Because this liquid cooling plate 200 is closest to the joint assembly 100 on the liquid inlet 410 and the theoretical flow rate is the largest. By adjusting the length of the joint assembly 100 on this liquid cooling plate 200 to the longest, the flow resistance becomes the largest, thereby improving the flow distribution, making the mass and flow rate of the coolant entering this liquid cooling plate 200 relatively small. Correspondingly, along the direction away from the liquid inlet 410, the lengths of the joint assemblies 100 on multiple liquid cooling plates 200 arranged in sequence gradually become smaller, and the flow resistance gradually becomes smaller, thereby improving the flow distribution, making the mass and flow rate of the coolant entering the liquid cooling plate 200 farthest from the joint assembly 100 on the liquid inlet 410 larger. By matching multiple different gears of joint assemblies 100 for multiple liquid cooling plates 200, the uniform distribution of the mass and flow rate of multiple liquid cooling plates 200 is achieved, thereby realizing the optimization of thermal management performance.

[0066] For the joint assembly 100 connected to the box body 300, if the joint assembly 100 is made of a metal material, such as an aluminum joint assembly 100, it can be hermetically fixed to the box body 300 by welding; if the joint assembly 100 is in an integrally injection-molded form, it can be sealed and fixed to the box body 300 by bonding. When a flange 122 is provided on the extension rod 120, the flange 122 can also be fixed to the box body 300 by bolting, and the second sealing ring 1221 inside the flange 122 is used to ensure the seal between the flange 122 and the box body 300.

[0067] The embodiment of the present application also provides an electrical device, including the above-mentioned battery. For example, the electrical device can be a vehicle, a ship, a spacecraft, etc. Among them, the vehicle can be a fuel vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle and a spaceship, etc. The embodiment of the present application does not make special restrictions on the above-mentioned electrical devices.

[0068] As mentioned above, only the specific implementation manners of the present application are described, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

Claims

1. A joint assembly, characterized in that: include: A joint (110), wherein the inner wall of the joint (110) is provided with a guide groove (111) and a plurality of limiting grooves (112); the extension direction of the guide groove (111) and the arrangement direction of the plurality of limiting grooves (112) are both consistent with the length direction of the joint (110); the extension direction of each limiting groove (112) is consistent with the extension direction of the guide groove (111); and each limiting groove (112) is connected to the guide groove (111); An extension rod (120) is rotatably connected to the joint (110), and a boss (121) is provided on the outer wall of the extension rod (120). The boss (121) can be slidably matched with the guide groove (111), and the boss (121) can be interference matched with the limiting groove (112).

2. The joint assembly according to claim 1, characterized in that: The inner wall of the joint (110) is provided with a sealing groove opened circumferentially around the joint (110); the sealing groove is cross-connected with the guide groove (111); a first sealing ring is embedded in the sealing groove to seal the joint assembly by interference fit.

3. The joint assembly according to claim 2, characterized in that: The sealing groove comprises a first sealing groove (113), the first sealing groove (113) being arranged at one end of the joint (110) connected to the extension rod (120), and the plurality of limiting grooves (112) being arranged at intervals in a direction away from the first sealing groove (113); The sealing groove further comprises a plurality of second sealing grooves (114), each of the second sealing grooves (114) being arranged at an end of the limiting groove (112) corresponding to the second sealing groove (114) away from the first sealing groove (113).

4. The joint assembly according to claim 3, characterized in that: The limiting groove (112) is connected to the guide groove (111) via a connecting groove (115), the connecting groove (115) extends along the circumference of the joint (110), the limiting groove (112) is connected to an end of the connecting groove (115) away from the guide groove (111), and extends along the extension direction of the joint (110) in a direction away from the first sealing groove (113); A limiting portion (116) is convexly provided on the side wall of the limiting groove (112) away from the guide groove (111); the boss (121) is elastic; and the limiting portion (116) can be used to limit the boss (121).

5. The joint assembly according to claim 4, characterized in that: The height of the first sealing ring embedded in the second sealing groove (114) is greater than the limiting groove (112), so that the first sealing ring embedded in the second sealing groove (114) stops the boss (121); Along the extension direction of the joint (110), the boss (121) can be limited between the first sealing ring embedded in the second sealing groove (114) and the limiting portion (116) of the limiting groove (112) corresponding to the second sealing groove (114), or the boss (121) can be limited between the inner wall of the limiting groove (112) away from the first sealing groove (113) and the limiting portion (116) of the limiting groove (112).

6. The joint assembly according to claim 3, characterized in that: The depth of the first sealing groove (113) is greater than that of the guide groove (111), and the depth of the second sealing groove (114) is greater than that of the limiting groove (112).

7. The joint assembly according to claim 5, characterized in that: The extension rod (120) is provided with a flange (122), the flange (122) and the boss (121) have a set distance, and a second sealing ring (1221) is embedded in the surface of the flange (122) away from the joint (110).

8. A battery, characterized in that: The invention comprises a liquid cooling plate (200), a box (300) and a joint assembly (100) according to any one of claims 1 to 7, wherein the liquid cooling plate (200) is arranged in the box (300), the joint assembly (100) is arranged on the liquid cooling plate (200) and / or the box (300), the joint assembly (100) is welded, bonded or bolted to the liquid cooling plate (200), and / or the joint assembly (100) is welded, bonded or bolted to the box (300).

9. The battery according to claim 8, characterized in that The battery comprises a liquid inlet pipeline (400) and a liquid outlet pipeline (500), the liquid inlet pipeline (400) and the liquid outlet pipeline (500) are both provided with a plurality of the joint assemblies (100) along their length direction, the number of the liquid cooling plates (200) is multiple, a single liquid cooling plate (200) is simultaneously connected to one of the joint assemblies (100) on the liquid inlet pipeline (400) and one of the joint assemblies (100) on the liquid outlet pipeline (500), the liquid inlet pipeline (400) is provided with a liquid inlet (410), the liquid outlet pipeline (500) is provided with a liquid outlet (510), and the liquid inlet (410) and the liquid outlet (510) are both connected to a joint assembly (100).

10. An electrical device, characterized in that: A battery comprising the battery of claim 8 or 9.

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