A battery pack liquid cooling plate and plug thereof

Abstract

The present invention relates to a battery pack liquid cooling plate and a plug thereof. A locking groove is provided on the inner wall surface of at least one pipe opening of the battery pack liquid cooling plate for cooperating with an elastic claw to stop and lock the plug in the removal direction, and the end surface of the pipe opening forms a limiting end surface for cooperating with the plug to stop the plug in the insertion direction. The inner wall surface of the pipe opening has a sealing section extending axially on one side of the locking groove for sealingly cooperating with the sealing plug of the plug. The plug includes a sealing plug for sealingly cooperating with the sealing section of the liquid inlet pipe and / or the liquid outlet pipe of the battery pack liquid cooling plate, one end of the sealing plug is provided with a mounting section, and an elastic claw for cooperating with the locking groove is provided on the outer wall surface of the mounting section, and the end of the mounting section away from the sealing plug is stopped and cooperated with the limiting end surface of the pipe opening or the end of the sealing plug away from the mounting section is stopped and cooperated with the limiting end surface of the pipe opening. It has the advantages of simple operation and high reliability.

Description

Technical Field

[0001] The invention belongs to the field of batteries, and in particular relates to a battery pack liquid cooling plate and a plug thereof. Background Art

[0002] With the development of new energy vehicles and energy storage technology, power battery technology is also constantly improving. The application of power battery systems in the automotive field is becoming more and more extensive. Lithium-ion battery packs are composed of multiple lithium-ion cells connected together through a series-parallel structure to output the voltage, current and power required by the system. In order to meet the temperature control requirements of the battery pack, more and more battery packs are currently using liquid cooling plates to regulate the temperature of the battery pack. However, in some special application areas, due to the small charging and discharging current of the battery pack and other reasons, the heat dissipation requirements can be met without the use of a liquid cooling plate. At this time, the inlet and outlet of the liquid cooling plate can be blocked to rely on the natural heat dissipation of the battery pack for temperature regulation. In order to prevent the fluid from flowing in and out of the liquid cooling plate, a plug that is simple to operate and reliable in sealing is particularly important.

[0003] The plug used to seal the pipe joint in the prior art, such as a pipe plug disclosed in the Chinese utility model patent with the authorization announcement number CN207421625U, includes a threaded pipe and a sealing end provided at one end of the threaded pipe, and a notch penetrating the pipe wall is provided on the pipe wall of the threaded pipe, and the notch extends from the other end of the threaded pipe toward the sealing end. This type of plug is sealed by threads, and it is difficult to set threads and use this type of plug due to the small size of the liquid inlet and outlet of the liquid cooling plate.

[0004] For another example, the Chinese utility model patent with the authorization announcement number CN207896638U discloses a cable protection tube plugging head, which includes a sealing cover, a handle, a sealing column and a fixing plate, wherein the handle is arranged on the left side of the sealing cover, the sealing column is arranged on the middle part of the right side of the sealing cover, and the sealing column is fixedly connected to the sealing cover, the fixing plate is arranged on the left inner side of the sealing cover, and a sealing ring is fixedly connected to the outer side of the sealing column. The plugging head can be used to block the liquid inlet and outlet of the liquid cooling plate, but when the pressure in the flow channel of the liquid cooling plate increases, the plugging head may be pushed out, and the reliability is low. Summary of the invention

[0005] The object of the present invention is to provide a battery pack liquid cooling plate and a plug thereof, aiming to solve the problem in the prior art that the plug is difficult to seal the liquid inlet and outlet pipes of the battery pack liquid cooling plate, or the sealing reliability is low.

[0006] To achieve the above purpose, the technical solution of the battery pack liquid cooling plate of the present invention is:

[0007] The battery pack liquid cooling plate includes a flow channel and a liquid inlet pipe and a liquid outlet pipe connected to the flow channel. The inner wall surface of the pipe mouth of at least one of the liquid inlet pipe and the liquid outlet pipe is provided with a locking groove for cooperating with the spring claw to stop and lock the plug in the removal direction. The end surface of the pipe mouth forms a limiting end surface for cooperating with the plug stop to stop the plug in the insertion direction. The inner wall surface of the pipe mouth has a sealing section extending axially on one side of the locking groove for sealing with the sealing plug of the plug.

[0008] The beneficial effect is that when the liquid inlet pipe and / or liquid outlet pipe of the battery pack liquid cooling plate of the present invention is sealed in cooperation with the plug of the present invention, the plug is inserted into the pipe opening, and the sealing plug of the plug is sealed in cooperation with the sealing section of the pipe opening to achieve sealing, and the spring claws on the plug are locked in cooperation with the locking grooves in the pipe opening to prevent the plug from being pushed out when the pressure in the liquid inlet and outlet increases, which has the advantages of simple operation and high reliability.

[0009] Furthermore, the sealing section is located at a side of the locking groove away from the limiting end surface. The locking groove is located at the end of the pipe mouth for easy operation.

[0010] Furthermore, the locking groove is an annular groove arranged along the circumference of the pipe mouth. The annular groove is easy to process.

[0011] The technical solution of the plug of the present invention is:

[0012] The plug includes a sealing plug for sealingly cooperating with the sealing section of the liquid inlet pipe and / or the liquid outlet pipe of the liquid cooling plate of the battery pack, one end of the sealing plug is provided with a mounting section, the outer wall surface of the mounting section is provided with a spring claw that cooperates with the locking groove hook, the end of the mounting section away from the sealing plug is stopped and cooperated with the limit end face of the pipe mouth, or the end of the sealing plug away from the mounting section is stopped and cooperated with the limit end face of the pipe mouth.

[0013] The beneficial effect is that when the liquid inlet pipe and / or liquid outlet pipe of the battery pack liquid cooling plate of the present invention is sealed in cooperation with the plug of the present invention, the plug is inserted into the pipe opening, and the sealing plug of the plug is sealed in cooperation with the sealing section of the pipe opening to achieve sealing, and the spring claws on the plug are locked in cooperation with the locking grooves in the pipe opening to prevent the plug from being pushed out when the pressure in the liquid inlet and outlet increases, which has the advantages of simple operation and high reliability.

[0014] Furthermore, one end of the installation section facing away from the sealing plug is engaged with the limiting end face of the pipe orifice, and one end of the installation section for engaging with the pipe orifice has a cylindrical folded edge to form a plugging cap structure. Providing a cylindrical folded edge to form a plugging cap structure enhances the convenience of manual operation.

[0015] Furthermore, the sealing plug is a cylindrical structure, and the mounting section has a central through hole connected to the cylindrical hollow of the sealing plug, thereby reducing the processing materials of the plug and further reducing the processing cost of the plug.

[0016] Furthermore, there are multiple spring claws, and the multiple spring claws are evenly distributed on the outer wall surface of the installation section. The multiple spring claws are evenly distributed on the outer wall surface of the installation section so that the axial force of the plug at each position is equal, thereby enhancing the plugging effect of the plug.

[0017] Furthermore, a sealing ring is provided on the outer wall surface of the sealing plug, which enhances the sealing effect between the plugging cap and the pipe opening.

[0018] Furthermore, a sawtooth sealing structure is provided on the outer wall surface of the sealing plug, which can perform multi-layer sealing and achieve better sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the pipe opening of the liquid inlet pipe of the battery pack liquid cooling plate of the present invention;

[0020] Figure 2 For along Figure 1 Middle AA section view;

[0021] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0022] Figure 4 This is a schematic diagram of the use state of the first embodiment of the plug of the present invention;

[0023] Figure 5 for Figure 4 A top view of

[0024] Figure 6 For along Figure 4 Middle CC section view;

[0025] Figure 7 for Figure 6 Enlarged view of point D in the middle;

[0026] Figure 8 This is a schematic diagram of the use state of the second embodiment of the plug of the present invention;

[0027] Fig. 9 For along Figure 8 Middle EE section view;

[0028] Fig.10 for Fig. 9 Enlarged view of point G in the middle;

[0029] Fig.11 for Fig. 9 Enlarged view of H in the middle;

[0030] In the figure: 1-pipe mouth; 11-locking groove; 2-plug; 21-spring claw; 22-plug cap; 23-sealing plug; 24-sealing ring; 25-folded edge; 26-installation section; 3-plug; 31-spring claw; 32-serrated sealing structure. DETAILED DESCRIPTION

[0031] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0032] A specific embodiment of the battery pack liquid cooling plate of the present invention includes a plate body, a flow channel is arranged in the plate body, a liquid inlet pipe and a liquid outlet pipe connected to the flow channel are provided on the plate body, the liquid inlet pipe includes a pipe opening 1, and the extension direction of the pipe opening 1 is defined as the front-to-back direction (i.e. Figure 1 Refer to Figure 1 , Figure 2 , Figure 3 It can be seen that the inner wall surface of the front end of the pipe mouth 1 has a locking groove 11 that cooperates with the spring claw 21 of the plug 2 in the removal direction to achieve locking when the plug 2 is inserted into the pipe mouth 1. The locking groove 11 in this embodiment is an annular groove arranged circumferentially along the inner wall surface of the pipe mouth 1; in other embodiments, there can also be multiple locking grooves 11, and the multiple locking grooves 11 are evenly distributed along the circumference of the inner wall surface of the pipe mouth 1. The end face of the pipe mouth 1 forms a limiting end face for cooperating with the plug to stop the plug in the insertion direction. The inner wall surface of the pipe mouth 1 has a sealing section extending axially on the rear side of the locking groove 11 and sealingly cooperating with the sealing plug 23 of the plug 2. The liquid outlet pipe in this embodiment has the same structure as the liquid outlet pipe of the battery pack liquid cooling plate in the prior art, and will not be repeated. In other embodiments, the locking groove may also be provided on the inner wall surface of the pipe opening of the liquid outlet pipe of the battery pack liquid cooling plate, and the liquid inlet pipe may have the same structure as the liquid inlet pipe of the battery pack in the prior art; or locking grooves may be provided on the inner wall surfaces of the pipe openings of both the liquid inlet pipe and the liquid outlet pipe.

[0033] The specific embodiment 2 of the battery pack liquid cooling plate of the present invention is different from the specific embodiment 1 of the battery pack liquid cooling plate in that the inner wall surface of the pipe mouth in this embodiment has a sealing section extending axially on the front side of the locking groove and sealingly cooperating with the sealing plug of the plug. The rest is the same as the embodiment 1 and will not be repeated here.

[0034] A specific embodiment 1 of the plug of the present invention is as follows Figure 4 , Figure 6 , the insertion direction of the plug 2 is defined as the front-to-back direction (i.e. Figure 4 , Figure 6The vertical direction in the figure corresponds to the specific structure of the nozzle in the first embodiment of the liquid cooling plate of the battery pack. The plug 2 in this embodiment includes a sealing plug 23 that is sealed with the sealing section of the nozzle 1 and a mounting section 26 disposed at the front end of the sealing plug 23. The outer wall surface of the mounting section 26 is provided with a spring claw 21 that moves radially into the locking groove 11 when the nozzle 1 is in a sealed state and hooks and cooperates. There are four spring claws 21 in this embodiment, and the four spring claws 21 are evenly distributed on the outer wall surface of the mounting section 26. In other embodiments, the number of spring claws 21 can also be two, three, five or other numbers. Specifically, the mounting section 26 is fixedly connected to the sealing plug 23. Since the spring claw 21 is a movable part, the front end of the mounting section 26 is fixedly connected to the sealing plug 23 at the outer part of the spring claw 21. There is a certain gap between the front end of the spring claw 21 and the sealing plug 23 so that the spring claw 21 can move in the radial direction. The front end of the installation section 26 has a flange structure to cooperate with the limiting end surface of the pipe opening, so as to limit the plug 2 in the insertion direction when the plug 2 is inserted into the pipe opening.

[0035] like Figure 5 , Figure 6 As shown, in order to save materials as much as possible and reduce the manufacturing cost of the plug of the present invention, the sealing plug 23 is a cylindrical structure. Similarly, the mounting section 26 has a central through hole connected to the hollow structure of the sealing plug 23.

[0036] like Figure 6 , Figure 7 As shown, the edge of the flange at the front end of the installation section 26 has a folded edge 25 extending forward, and the folded edge 25 is cylindrical. The cylindrical folded edge 25 and the installation section 26 together form a plugging cap 22, so as to facilitate manual operation to insert the plug into the pipe orifice.

[0037] like Figure 6 As shown, the outer wall surface of the sealing plug 23 is also provided with an annular groove, and a sealing ring 24 is installed in the annular groove to enhance the sealing performance between the sealing plug 23 and the pipe mouth 1. The sealing ring 24 is an O-ring 24, and there are two of them. In other embodiments, the number of the sealing rings 24 can also be one, three or any other number.

[0038] When using the plug of the present invention to seal the liquid inlet pipe and / or liquid outlet pipe of the battery pack liquid cooling tube of the present invention, the plug 2 of the present invention is inserted into the liquid inlet and outlet pipes to be blocked, and the sealing plug 23 of the plug 2 cooperates with the sealing section in the pipe mouth 1 to seal. In the process of inserting the plug 2 into the liquid inlet and outlet pipes, the spring claw 21 moves radially and hooks with the locking groove 11 in the pipe mouth 1 to lock so as to limit the plug 2 in the direction of pulling out the plug 2. At the same time, the flange of the installation section and the limiting end face of the pipe mouth are stopped to limit the plug in the insertion direction of the plug 2, so that the plug 2 remains fixed in the pipe, preventing the plug 2 from being pushed out when the pressure in the liquid inlet and outlet pipes increases.

[0039] The specific embodiment 2 of the plug of the present invention is different from the specific embodiment 1 of the plug in that: Figure 8 , Fig. 9 , Fig.10 , Fig.11 As shown, the sealing structure on the sealing plug in this embodiment is a serrated sealing structure 32, which includes a plurality of toothed sealing rings arranged at intervals on the outer wall of the sealing plug, that is, the serrated sealing structure is similar to a wine bottle cork. When the plug 3 is inserted into the pipe mouth 1, the serrated sealing structure 32 is in sealing cooperation with the pipe mouth, and the spring claw 31 is in blocking cooperation with the locking groove 11.

[0040] The specific embodiment 3 of the plug of the present invention is different from the specific embodiment 1 of the plug in that, corresponding to the structure of the nozzle in the specific embodiment 2 of the battery pack liquid cooling plate, the installation section of the plug in this embodiment is arranged at the lower end of the sealing plug, the spring claw on the installation section at the lower end of the plug is hooked with the locking groove at the lower side of the nozzle, the sealing plug at the upper end of the plug is sealed with the sealing section at the upper side of the nozzle, and the sealing plug of the plug has an outer flange structure to cooperate with the limit end face of the nozzle. Others are the same as the embodiment 1 of the plug and will not be repeated.

Claims

1. A battery pack liquid cooling plate plug, the battery pack liquid cooling plate comprising a flow channel and a liquid inlet pipe and a liquid outlet pipe connected to the flow channel, characterized in that: The inner wall surface of the pipe mouth of at least one of the liquid inlet pipe and the liquid outlet pipe is provided with a locking groove for cooperating with the elastic claw to stop and lock the plug in the removal direction, the end surface of the pipe mouth forms a limiting end surface for cooperating with the plug stop to stop the plug in the insertion direction, the inner wall surface of the pipe mouth has a sealing section extending axially on one side of the locking groove for sealing with the sealing plug of the plug, a serrated sealing structure is provided on the outer wall surface of the sealing plug of the plug, an installation section is provided at one end of the sealing plug, and an elastic claw cooperating with the locking groove hook is provided on the outer wall surface of the installation section A plurality of spring claws are evenly distributed in the circumferential direction of the outer wall surface of the installation section. The spring claws are movable parts. There is a certain gap between the front end of the spring claws and the sealing plug so that the spring claws can move in the radial direction. The end of the installation section away from the sealing plug is stopped and matched with the limit end face of the pipe mouth, or the end of the sealing plug away from the installation section is stopped and matched with the limit end face of the pipe mouth. The end of the installation section used for stopping and matching with the pipe mouth has a cylindrical folded edge to form a plugging cap structure. The spring claws on the plug are locked with the locking grooves in the pipe mouth to prevent the plug from being pushed out when the pressure in the inlet pipe and the outlet pipe increases.

2. A battery pack liquid cooling plate plug according to claim 1, characterized in that: The sealing plug is a cylindrical structure, and the mounting section has a central through hole connected to the cylindrical hollow of the sealing plug.

3. A battery pack liquid cooling plate plug according to claim 1, characterized in that: A sealing ring is arranged on the outer wall surface of the sealing plug.

Images