Air tightness detection device for liquid cooling pipe of battery pack

Abstract

The invention discloses an air tightness detection device for a liquid cooling pipe of a battery pack, which belongs to the technical field of air tightness detection and comprises a main body, a sliding block and a locking mechanism, the sliding block is installed on one side of the main body in a sliding mode. The locking mechanism comprises a clamping jaw hinged to one side of the main body; the clamping jaw is matched with a base body of the liquid cooling interface; and a sealing pipe matched with the liquid cooling interface is arranged on one side of the sliding block. The main body is locked on a base body of the liquid cooling interface through the locking mechanism, and the sealing pipe on one side of the sliding block is in butt joint with the liquid cooling interface, so that the liquid cooling interface is led out; the operation is easy, and the docking state can be visually detected; the tight joint of the sealing pipe and the liquid cooling interface can be kept, and the airtight effect is good; the device is small in structure, convenient to carry, simple to maintain and low in maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of air tightness detection, and in particular to an air tightness detection device for a liquid cooling tube of a battery pack. Background Art

[0002] When new energy electric vehicles are running continuously, the battery pack will generate heat, which needs to be dissipated through the coolant circulation of the cooling system. The liquid cooling circulation pipeline is an important part of the cooling system. If there is a leak in the liquid cooling circulation pipeline, the cooling system will fail, the battery pack temperature will rise too high, and even cause power supply failure. Therefore, when a new battery pack leaves the factory, or when an old car is maintained, the liquid cooling circulation pipeline of the battery pack must be regularly tested for air tightness.

[0003] The battery pack is usually provided with a specific liquid cooling interface. The current liquid cooling interface lacks a fixed fastening mechanism, making it difficult to fasten the external detection pipeline to the liquid cooling interface. Summary of the invention

[0004] In view of the above-mentioned technical problems existing in the prior art, the present invention provides an air tightness detection device for a battery pack liquid cooling tube, which docks and tightens the liquid cooling interface of the battery pack to facilitate air tightness detection.

[0005] The present invention discloses an air tightness detection device for a liquid cooling tube of a battery pack, comprising a main body, a slider and a locking mechanism; the slider is slidably installed on the inner side of the main body; the locking mechanism comprises a clamping claw hinged on one side of the main body; the clamping claw cooperates with a base of a liquid cooling interface; a sealing tube cooperating with the liquid cooling interface is provided on one side of the slider.

[0006] Preferably, a handle is provided at the end of the clamping jaw;

[0007] A locking spring is provided between the handle and the main body;

[0008] The inner side of the clamping jaw is provided with a receiving groove for the base body.

[0009] Preferably, a boss is provided on one side of the main body, and the clamping claw is hinged on the boss; a clamping claw is provided on the left and right sides of the main body respectively; and a first limiting boss cooperating with the clamping claw is provided on the outer side of the main body.

[0010] Preferably, a sealing spring is provided between the slider and the main body; and at least one sealing ring matching the liquid cooling interface is provided on the sealing tube.

[0011] Preferably, the present invention also includes a guiding mechanism, which includes a guiding rod and a guiding groove arranged on the main body; the guiding rod is installed on the inner side of the sliding block; the guiding rod is slidably installed on the guiding groove; a limiting groove is arranged on the outer side of the guiding groove; and a limiting block matching the limiting groove is arranged at the outer end of the guide rod.

[0012] Preferably, the liquid cooling interface includes an inlet and an outlet arranged on one side of the base, and the sealing tube includes a first sealing tube matching the inlet and a second sealing tube matching the outlet; the outer diameter of the inlet is larger than the outer diameter of the outlet; the outer diameter of the first sealing tube is larger than the outer diameter of the second sealing tube.

[0013] Preferably, the sealing tube is fixed on the sliding block, and a detachable connecting tube is provided at one end of the sealing tube.

[0014] Preferably, a second limiting boss is provided on one side of the sealing tube, and a buckle is provided on the other side of the sealing tube; the sealing tube is fixed to the sliding block via the second limiting boss and the buckle.

[0015] Preferably, a through hole is provided on the main body, and one end of the sealing tube is movably installed in the through hole; the other end of the sealing tube is provided with a chamfer and connected to the liquid cooling interface.

[0016] Preferably, the present invention further comprises an injection assembly and a detection assembly, and the injection assembly and the detection assembly are connected to the sealing tube via a connecting tube.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the main body is locked on the base of the liquid cooling interface through the locking mechanism, and the sealing tube on one side of the slider is connected to the liquid cooling interface, thereby leading out the liquid cooling interface; the joining operation is easy to operate, and the docking status can be visually detected; the sealing tube and the liquid cooling interface can be kept in close connection, and the airtight effect is good; the structure is small and easy to carry, the equipment maintenance is simple, and the maintenance cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the coordination between the air tightness detection device and the liquid cooling interface;

[0019] Figure 2 It is a schematic diagram of the separation of the air tightness detection device and the liquid cooling interface;

[0020] Figure 3 This is a schematic diagram of the installation of the sealing tube;

[0021] Figure 4 It is a cross-sectional view of the main body and the slider;

[0022] Figure 5 It is a schematic diagram of the cooperation between the sealing tube and the liquid cooling interface;

[0023] Figure 6 It is the logic block diagram of the airtightness detection device.

[0024] Markings in the figure: 1 airtight detection device, 11 main body, 111 boss, 112 first limiting boss, 113 guide groove, 115 limiting groove, 117 through hole, 12 locking mechanism, 121 clamping claw, 122 handle, 123 receiving groove, 125 locking spring, 13 slider, 131 sealing spring, 14 sealing tube, 141 first sealing tube, 142 second sealing tube, 145 second limiting boss, 146 buckle, 15 guide rod, 16 limiting block, 17 sealing ring, 2 connecting pipe, 3 liquid cooling interface, 31 inlet, 32 outlet, 33 base; 4 injection assembly, 5 detection assembly. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0027] Overview: The liquid cooling circulation pipeline is an important component of the cooling system of a battery pack. The cooling circulation pipeline is laid in the battery pack and cannot be detected visually. The pressure of the liquid cooling circulation pipeline can be increased by injecting gas or fluid into the cooling system. After a certain period of time, the pressure change is detected, and it can be judged by the pressure change whether leakage occurs. The liquid cooling interface is an interface to the outside of the liquid cooling circulation pipeline. Through this interface, high-pressure gas or liquid can be introduced into the cooling circulation pipeline. The existing accessories that match the liquid cooling interface are fixed, or the locking system is complicated, which is not conducive to the frequent plugging and unplugging operations during battery pack maintenance; and the accessories have a short service life. After frequent plugging and unplugging operations, the accessories will wear and leak, and cannot meet the needs of large-scale inspection on the assembly line.

[0028] like Figure 1-Figure 6 The airtightness detection device 1 of the specific embodiment includes a main body 11, a slider 13 and a locking mechanism 12; the slider 13 is slidably installed on one side of the main body 11; the locking mechanism 12 includes a clamping jaw 121 rotatably installed on one side of the main body 11; the clamping jaw 121 cooperates with the base 33 of the liquid cooling interface 3; a sealing tube 14 cooperating with the liquid cooling interface 3 is provided on one side of the slider 13.

[0029] The main body is locked on the base of the liquid cooling interface through the locking mechanism, and the sealing tube on one side of the slider is connected to the liquid cooling interface to lead out the liquid cooling interface; the joining operation is easy to operate and the docking status can be visually detected; the sealing tube and the liquid cooling interface 3 can be kept in close connection with good airtightness; the structure is compact and easy to carry, the equipment maintenance is simple and the maintenance cost is low.

[0030] like Figure 2 , Figure 3 and Figure 4 The end of the clamping jaw 121 is provided with a handle 122; a locking spring 125 is provided between the handle 122 and the main body 11 to facilitate the clamping jaw 121 to be clamped on the base 33; a receiving groove 123 matching the base 33 is provided on the inner side of the clamping jaw 121. A boss 111 is provided on one side of the main body 11, and the clamping jaw 121 is rotatably mounted on the boss 111; a clamping jaw 121 is provided on the left and right sides of the main body 11 respectively; a first limiting boss 112 matching the clamping jaw 121 is provided on the outer side of the main body 11 to limit the minimum angle of the clamping jaw 121, so as to facilitate operation.

[0031] A sealing spring 131 is provided between the slider 13 and the main body 11, and the sealing tube 14 is pressed against the liquid cooling interface 3 by the sealing spring 131; the pressing force of the sealing spring 131 has been strictly tested, and the airtight effect is good when the liquid cooling interface is stuck. At least one sealing ring 17 matching the liquid cooling interface 3 is provided on the sealing tube 14.

[0032] Figure 4 A guide mechanism is also shown, which includes a guide rod 15 and a guide groove 113 arranged on the main body 11; the guide rod 15 is installed on the inner side of the slider 13; the guide rod 15 is slidably installed on the guide groove 113; a limiting groove 115 is arranged on the outer side of the guide groove 113; and a limiting block 16 matching the limiting groove 115 is arranged at the outer end of the guide rod 15.

[0033] like Figure 2 The liquid cooling interface 3 includes an inlet 31 and an outlet 32 ​​arranged on one side of the base 33, and the sealing tube 14 includes a first sealing tube 141 matched with the inlet 31 and a second sealing tube 142 matched with the outlet 32; the outer diameter of the inlet 31 is larger than the outer diameter of the outlet 32; the outer diameter of the first sealing tube 141 is larger than the outer diameter of the second sealing tube 142. It can adapt to the docking work of special-shaped interfaces and solve the problem of no matching detection equipment for batch detection of liquid cooling pipelines on the assembly line and detection of liquid cooling pipelines of battery packs after disassembly at the end of sales.

[0034] The sealing tube 14 is fixed on the slider 13, and a detachable connecting tube 2 is provided at one end of the sealing tube 14. A second limiting boss 145 is provided on one side of the sealing tube 14, and a buckle 146 is provided on the other side of the sealing tube 14; the sealing tube 14 is fixed on the slider 13 through the second limiting boss 145 and the buckle 146.

[0035] The main body 11 is provided with a through hole 117 , and one end of the sealing tube 14 is movably installed in the through hole 117 ; the other end of the sealing tube 14 is provided with a chamfer and connected to the liquid cooling interface 3 .

[0036] like Figure 6 The air tightness detection device further includes an injection assembly 4 and a detection assembly 5, which are connected to one of the sealing tubes 14 through a connecting tube 2. More specifically, the connecting tube 2 is connected to a first sealing tube 141; the second sealing tube 142 is plugged to block the outlet 32.

[0037] The present invention makes a personalized docking setting based on the shape of the battery pack liquid cooling interface 3. At the same time, considering the limitation of the operating space, a locking mechanism is appropriately added, so that the operator only needs to align the interface according to the operating requirements and insert it to automatically lock it. The number of movable parts is reduced, the structure is simplified, the locking mechanism can play a locking role, and the operation is simplified, which is more suitable for a reusable production environment. The operating technology of the operator does not require professional training and usage skills.

[0038] The present invention can increase the service life and reduce the fixed asset investment; reduce the operation steps, making the airtight plugging and unplugging process simpler and more standardized; reduce the risk points - two interfaces are connected by one device at a time; it is beneficial to equipment management; improve the professional technical level of equipment, improve the efficiency of tooling utilization, and improve the test pass rate.

[0039] A simple operation step is as follows:

[0040] Align the first sealing port and the second sealing port to the inlet and outlet of the liquid cooling interface respectively. Figure 2 ;

[0041] Push the main body forward and press it into the liquid cooling interface. When you hear a "click" from the locking mechanism, the connection is complete. Figure 1 ;

[0042] Start gas injection and testing;

[0043] After the test is completed, press the locking mechanisms on both sides, release under the action of the sealing spring, withdraw the main body and the slide, and the operation is completed. During docking and release, it can be operated with one hand to improve the operation efficiency.

[0044] The present invention is a personalized airtight detection device designed according to the structural characteristics of the liquid cooling interface. The single-tube sealing points all adopt a double sealing ring structure, and the automatic locking and automatic sealing thrust are integrated together. The sealing operation of the two interfaces is completed by clamping once.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The air tightness detection device of the battery pack liquid cooling tube is characterized in that: It comprises a main body (11), a slide block (13) and a locking mechanism (12); The slider (13) is slidably mounted inside the main body (11); The locking mechanism (12) comprises a clamping claw (121) hinged to one side of the main body (11); The clamping jaw (121) cooperates with the base (33) of the liquid cooling interface (3); A sealing tube (14) matching with the liquid cooling interface (3) is provided on one side of the sliding block (13).

2. The airtightness detection device according to claim 1, characterized in that: A handle (122) is provided at the end of the clamping jaw (121); A locking spring (125) is provided between the handle (122) and the main body (11); The inner side of the clamping jaw (121) is provided with a receiving groove (123) which matches with the base body (33).

3. The airtightness detection device according to claim 1, characterized in that: A boss (111) is provided on one side of the main body (11), and the clamping claw (121) is hinged on the boss (111); A clamping claw (121) is respectively provided on the left and right sides of the main body (11); The outer side of the main body (11) is provided with a first limiting boss (112) which matches with the clamping claw (121).

4. The airtightness detection device according to claim 1, characterized in that: A sealing spring (131) is provided between the slider (13) and the main body (11); The sealing tube (14) is provided with at least one sealing ring (17) which matches the liquid cooling interface (3).

5. The airtightness detection device according to claim 1, characterized in that: It also includes a guide mechanism, which includes a guide rod (15) and a guide groove (113) arranged on the main body (11); The guide rod (15) is installed on the inner side of the slider (13); the guide rod (15) is slidably installed on the guide groove (113); A limiting groove (115) is arranged outside the guide groove (113); and a limiting block (16) matching with the limiting groove (115) is arranged at the outer end of the guide rod (15).

6. The airtightness detection device according to claim 1, characterized in that: The liquid cooling interface (3) comprises an inlet (31) and an outlet (32) arranged on one side of the base (33); the sealing tube (14) comprises a first sealing tube (141) matched with the inlet (31) and a second sealing tube (142) matched with the outlet (32); The outer diameter of the inlet (31) is greater than the outer diameter of the outlet (32); The outer diameter of the first sealing tube (141) is greater than the outer diameter of the second sealing tube (142).

7. The airtightness detection device according to claim 1, characterized in that: The sealing tube (14) is fixed on the sliding block (13), and a detachable connecting tube (2) is provided at one end of the sealing tube (14).

8. The airtightness detection device according to claim 7, characterized in that: A second limiting boss (145) is provided on one side of the sealing tube (14), and a buckle (146) is provided on the other side of the sealing tube (14); The sealing tube (14) is fixed on the sliding block (13) via a second limiting boss (145) and a buckle (146).

9. The airtightness detection device according to claim 7, characterized in that: The main body (11) is provided with a through hole (117). One end of the sealing tube (14) is movably installed in the through hole (117); The other end of the sealing tube (14) is provided with a chamfer and is connected to the liquid cooling interface (3).

10. The airtightness detection device according to any one of claims 1 to 9, characterized in that: It also includes an injection component (4) and a detection component (5), The injection assembly (4) and the detection assembly (5) are connected to the sealing tube (14) via a connecting tube (2).

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