External mounting liquid pipe interface structure applied to power battery

Abstract

The utility model relates to the technical field of power batteries, in particular to an external installation liquid pipe connector structure applied to a power battery, which comprises a liquid pipe connector body, the liquid pipe connector body is integrally of an integral structure formed by machining and is in threaded connection with a box body, and a side lug part is arranged in the middle of the liquid pipe connector body. A notch is formed in one side of the side lug part, an O-shaped ring is embedded through the notch, a sealing part used for being connected with a liquid pipe in a battery pack is arranged at one end of the liquid pipe connector body, and mounting holes matched and fixed with bolts are formed in the opposite angles of the side lug part. The external mounting liquid pipe interface structure applied to the power battery can reduce the development cost of a heat management system, improve the structural strength of a product and improve the heat exchange efficiency, is suitable for mass production and use, and is simple to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to an externally installed liquid pipe interface structure applied to power batteries. Background Technique

[0002] In recent years, the new energy vehicle industry has developed rapidly. With the continuous upgrading of the performance of new energy vehicles, the power battery system, as an important part of it, also needs to be optimized. The externally installed liquid pipes of power batteries usually refer to the coolant pipelines used in liquid-cooled battery thermal management systems. In a liquid-cooled system, the coolant circulation is a key part of maintaining the stable temperature of the battery pack. The design and layout of these pipelines are crucial for ensuring battery performance, extending battery life, and ensuring safety.

[0003] In the current power battery thermal management system, the traditional connection processes between the liquid-cooled system and the vehicle cooling hoses, including machining forming, cold heading forming, and integrated welding, etc., although they have reached a certain technical level and meet the basic application requirements, the common problems of these processes are large initial investment, long production cycle, complex process chain, and high requirements for operating skills, resulting in high development and manufacturing costs. At the same time, professional personnel are required for fine operation during the actual installation process, increasing labor costs and time costs. In view of this, it is particularly important to develop a liquid pipe interface structure that can not only ensure cooling efficiency and system stability but also greatly reduce production costs, simplify installation steps, and facilitate automated batch production. Content of the Utility Model

[0004] The purpose of the utility model is to provide an externally installed liquid pipe interface structure applied to power batteries to solve the problems of high cost, complex process, and difficult installation faced by the current connection process of the power battery liquid-cooled system as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An externally installed liquid pipe interface structure applied to power batteries, including a liquid pipe interface body. The liquid pipe interface body is an integral structure formed by machining and is screwed to the box body. A side ear is provided in the middle of the liquid pipe interface body. A notch is opened on one side of the side ear, and an O-ring is fitted through the notch. One end of the liquid pipe interface body is provided with a sealing part for connecting with the liquid pipe inside the battery pack. And mounting holes for cooperating with bolts for fixation are provided diagonally on the side ear. An axial surface is provided at the connection between the sealing part and the side ear, and a thrust surface is provided at the connection between the liquid pipe interface body and the side ear.

[0006] Preferably, the O-ring is a rubber sealing ring with an irregular cross-section, and a groove adapted to the structure of the O-ring is provided on the side of the side ear located on one side of the sealing part.

[0007] Preferably, the mounting hole has a variable diameter structure, and the depth of the large-diameter part of the mounting hole is 1.5 mm, and the depth of the small-diameter part is 4.5 mm.

[0008] Preferably, the thickness of the side ear part is 6.0 mm, and the length of the sealing part is 19.8 mm.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows: The external mounting liquid pipe interface structure applied to the power battery can reduce the development cost of the thermal management system, improve the structural strength of the product, enhance the heat exchange efficiency, and is suitable for mass production and use with simple assembly. The external mounting liquid pipe interface structure applied to the power battery designs an integrated structure of the side ear part and the sealing part through machining forming technology. The side ear part is stably connected and installed with the vehicle structure or the battery pack through the mounting holes arranged diagonally and cooperating with bolts, and the sealing part is directly connected to the liquid pipe inside the battery pack, realizing seamless docking with the liquid cooling system of the battery pack and ensuring the efficient and safe operation of the entire power battery thermal management system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic structural diagram of an external mounting liquid pipe interface structure applied to a power battery of the present utility model;

[0011] Figure 2 is a three-dimensional structural schematic diagram of a liquid pipe interface body of an external mounting liquid pipe interface structure applied to a power battery of the present utility model;

[0012] Figure 3 is a side view structural schematic diagram of a liquid pipe interface body of an external mounting liquid pipe interface structure applied to a power battery of the present utility model;

[0013] Figure 4 is a sectional view structural schematic diagram of a liquid pipe interface body of an external mounting liquid pipe interface structure applied to a power battery of the present utility model.

[0014] In the figure: 1. Liquid pipe interface body; 2. Side ear part; 3. O-ring; 4. Sealing part; 5. Mounting hole; 6. Axial surface; 7. Thrust surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0016] Please refer to Figures 1-4The utility model provides a technical solution: an externally mounted liquid pipe interface structure for a power battery, comprising a liquid pipe interface body 1, the liquid pipe interface body 1 as a whole is an integrated structure formed by machining and is screwed to the box body, a side ear portion 2 is provided in the middle of the liquid pipe interface body 1, the thickness of the side ear portion 2 is 6.0 mm, and one end of the liquid pipe interface body 1 is provided with a sealing portion 4 for connecting to the liquid pipe in the battery pack, the length of the sealing portion 4 is 19.8 mm, the axial surface of the sealing portion 4 is an effective sealing surface, the surface roughness does not exceed Ra1.6, and a mounting hole 5 is diagonally provided on the side ear portion 2 for fixing with a bolt, the liquid pipe interface body 1 of this structure is designed into a structure integrating the side ear portion 2 and the sealing portion 4 by machining forming technology, the side ear portion 2 not only provides a stable support point for installation, and is convenient for fixed connection with the battery pack, but also cooperates with the mounting hole 5 for precise matching, and at the same time, the sealing portion 4 is directly connected to the liquid pipe inside the battery pack, realizing seamless docking with the liquid cooling system of the battery pack, and this design ensures that the coolant can flow smoothly and unimpeded in the battery The internal circulation of the group effectively takes away the heat generated by the battery when it is working, maintains the battery pack in a suitable working temperature range, and can also be heated under low temperature conditions. Therefore, the overall structure of the liquid pipe interface body 1 is simple, the installation is simple, can meet the actual performance requirements, is convenient for mass production and installation, and reduces labor costs. An axial surface 6 is provided at the connection between the sealing part 4 and the side ear part 2. The axial surface 6 of this structure can guide the liquid pipe interface and the reserved hole of the battery pack box to be positioned by cooperating with the box clearance, thereby maintaining the stability of the connection. A thrust surface 7 is provided at the connection between the liquid pipe interface body 1 and the side ear part 2. When the hose of the whole vehicle is inserted, the design of the thrust surface 7 plays an important limiting role. It strictly controls the insertion depth of the hose to prevent assembly errors or system failures caused by excessive insertion, thereby ensuring assembly accuracy, simplifying the operation process, ensuring the sealing and normal function of the cooling system, and maintaining the assembly quality and operation safety of the whole vehicle. A notch is provided on one side of the side ear part 2, and an O-ring 3 is embedded through the notch. The O-ring 3 is a rubber sealing ring with an irregular cross-section and its material is EPDM 70, and the side ear portion 2 is located on one side of the sealing portion 4 and is provided with a groove adapted to the structure of the O-ring 3. The O-ring 3 of this structure can be installed in the groove on the sealing portion 4. When the liquid pipe interface body 1 is connected, the O-ring 3 will be squeezed. The O-ring 3 will fill the tiny gap at the connection of the liquid pipe interface body 1 through deformation, isolate the impurities and water vapor outside the power battery pack, form a sealing barrier, and prevent the coolant from leaking between the inside and outside of the system, thereby ensuring the sealing integrity and efficiency of the liquid cooling system, and thus ensuring the stability of the battery temperature. The mounting hole 5 is a variable diameter structure, and the large aperture depth of the mounting hole 5 is 1.5mm, and the small aperture depth is 4.When the installation hole 5 of this structure is fastened with bolts, a larger contact area and a deeper embedding effect can be generated. This can not only improve the stability of the bolt connection, but also ensure that a larger torque is transmitted during the fastening process, thereby enhancing the structural strength and anti-pulling ability of the entire connection area. This enhanced torque effect helps prevent the interface from loosening under vibration or high-load conditions, ensuring the reliability and safety of the long-term operation of the battery pack liquid cooling system.

[0017] Working principle: When using the external installation liquid pipe interface structure applied to power batteries, first, the O-ring 3 is placed in the groove installed on the sealing part 4, and then the liquid pipe interface body 1 is directly connected to the liquid pipe inside the battery pack through the sealing part 4. When the O-ring 3 is subjected to the extrusion pressure of the liquid pipe inside the battery pack, the O-ring 3 will deform to fill the tiny gaps at the connection of the liquid pipe interface body 1 for good sealing. And the axial surface 6 will also position the connection between the sealing part 4 and the liquid pipe inside the battery pack, and cooperate with the clearance of the box hole position to make the connection more firm. Then, when the liquid pipe interface body 1 is inserted into the hose of the whole vehicle, the thrust surface 7 can also limit the hose to control the insertion depth of the hose. Finally, the liquid pipe interface body 1 provides a mounting support pad through the side ear 2 to be mounted at a suitable position on the vehicle structure or the battery pack. The side ear 2 is precisely fitted and fixed through the installation hole 5 during installation. And due to the variable diameter design of the installation hole 5, when the installation hole 5 is fastened with bolts, a larger contact area and a deeper embedding effect can be generated, making the stability of the bolt connection better, ensuring that a larger torque is transmitted during the fastening process, and guaranteeing the reliability and safety of the long-term operation of the battery pack liquid cooling system, thus completing a series of operations.

[0018] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An externally mounted liquid pipe interface structure for a power battery, comprising a liquid pipe interface body (1), wherein the liquid pipe interface body (1) is an integral structure formed by machining and is screwed to a box body, and is characterized in that: A side ear portion (2) is provided in the middle of the liquid pipe interface body (1), a notch is provided on one side of the side ear portion (2), an O-ring (3) is engaged through the notch, and a sealing portion (4) for connecting to a liquid pipe in a battery pack is provided at one end of the liquid pipe interface body (1), and mounting holes (5) for fixing with bolts are provided diagonally on the side ear portion (2), an axial surface (6) is provided at the connection between the sealing portion (4) and the side ear portion (2), and a thrust surface (7) is provided at the connection between the liquid pipe interface body (1) and the side ear portion (2).

2. The externally mounted liquid pipe interface structure for a power battery according to claim 1, characterized in that: The O-ring (3) is a rubber sealing ring with an irregular cross-section, and the side ear portion (2) is located on one side of the sealing portion (4) and is provided with a groove that is compatible with the structure of the O-ring (3).

3. The externally mounted liquid pipe interface structure for a power battery according to claim 1, characterized in that: The mounting hole (5) is a variable diameter structure, and the large aperture depth of the mounting hole (5) is 1.5 mm, and the small aperture depth is 4.5 mm.

4. The externally mounted liquid pipe interface structure for a power battery according to claim 1, characterized in that: The thickness of the side ear portion (2) is 6.0 mm, and the length of the sealing portion (4) is 19.8 mm.

Images